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TSS Logs for Sony Television Products

1. There are no drive controls to any of the CRT The only adjustment that can be made is G2 and focus All other KPR53EX20 serial 8001436 unit has poor black adjustments are automatic through he IK circuit Suggest the tech look at each tube faceplate and inspect the phosphor for and white tracking Tech needs to know how to get WRONG COLOR the normal registration burn If the tubes are coffee color in into the internal adjustments to adjust drive to each i 5 the registration area It may just mean we have a set with a When the set is in the external video input mode system control jand put back into the antenna mode the set will be on channel 167 with white noise on the screen D KP53XBR15 p KP53EX20 When measuring the Power Key input to the main KPR46EX35 Unit turns itself on or off at its own Microprocessor IC001 11 it was only 3 7 volts with no keys will Customer explains that the TV will turn it self pressed Evan veil Connemon a was dnoonnecied SYSTEM ae IC001 11 stayed at 3 7 volts Also this voltage fluctuated in KPR46EX35 AP on in the middle of the night or it will turn itself off CONTROL _ level from 3 5 to 3 7 When C038 was removed the voltage while watching the set The power switch IC001 in A board increased to 5 1 volts Suggest the tech replace C038 a 0 01 i mfd capacitor With the new capacitor the voltage retained the 5 1 volts C038 was leaky P Si lot of hours on the CRT and
2. sent tech information KP41T35 RA2 lines approx 1 16th of an inch lines that are interlacing on the symptom that may lead him to the conclusion that the kind of a basket weave look like Tech replace the Jungle IC is at fault Flyback with no effect in the symptom A2 TSS Logs for Sony Television Products SYMPTOM MODEL KEYWORD KP53V75 NO RASTER KP53V75 9057801 Unit has no raster and cycling on and off every 2 seconds When turning up the G2 on any one of the CRT s the CRT will not have a complete raster but a glow that will be brighter on the top of the screen than the bottom KV53V75 Unit will not turn on KP53S65 serial 9141528 Unit has a normal picture but it does not have luminance in the PIP area KP53S65 KP41T65 retrace Unit has a bright screen with retrace lines KV53V75 NO TURN ON This symptom is generally indicative of a vertical failure had the tech measure the amp 15 vdc from the main power supply at PS601 amp PS602 PS601 was open causing the 15 volts to be missing However two weeks later we were out again to replace both fuses Customer claimed as before the set was working fine the day before and he turned it on in the morning and it failed to have raster This indicated the fuses were opening at TURN ON rather than failing while watching the set It was indicated by Sony there was going to be a bulletin on this unit that reduced the size of the filter capacitors on the
3. Sony KP53V15 AP chassis This unit will not allow Electronic centering is accomplished by the customer using the customer convergence centering to function _ the remote Serial data codes will instruct the bus decoder Tech sei to know where the electronic centering IC506 to change the D C offset voltage to 1C551 on V board Defective IC551 Tracing the pulsating we find the output of IC506 has a Unit has a pulsating red convergence pulsing on it that is coinciding to the pulsing on the screen Unit has a defective IC506 Feed Sei ce ai Hacer eee This unit has 3 defective CRT s that have letter burns on caused by the word VIDEO is burned on the sofeen them All three tubes need replacement This phenomena is normal and is caused by the IK pulses that are produced at the instant of turn on Even thought the cathodes are not completely warmed up there will be a slight amount of beam current produced by just the IK pulses Since these pulses are at the top portion of the tube or on the curved funnel portion of the CRT this symptom is common and is not considered a defect in the CRT KP41EXR96 unit dead Will not power up But will No 15 or 15 volt supply Diode D605 shorted Feeds all turn if the convergence board is disconnected devices on the and 15 volt supply line Note the Customer claimed Picture separated in to colors replacement Dual diode be sure it is a common ANODE then the TV went out device KPR46EXR15 Unit has
4. amp C565 Unit had 0 effectively move the vertical height and centering defective Pump up capacitor C565 but it will not eliminate the foldover condition SYMPTOM vertical sweep Also has top vertical foldover Tech VERTICAL SWEEP can get into the menu and effectively move the vertical height and centering but it will not illuminate the foldover condition KV36XBR200 serial 9015396 Unit has insufficient KV36XBR200 AA 2H Customers DVD player always plays back in 16X9 mode Customer has JVC DVD player Disc plays back in 16 9 customer selects 4X3 mode on their DVD player but TV stills displays 16X9 The JVC DVD player puts out ID signal even when no 16X9 U ERAR R E 16x3 mede available When the Sony TV detects this special ID signal it automatically puts the TV in to the 16X9 mode Compression Mode Customer must now select modes manually on their DVD player KV36XBR250 This television has as symptom on the screen where a small area has a non linear horizontal area that causes the image to expand GEOMETRY when the image passes through this area The area about 1 2 inch wide and effect the entire frame of the picture It can be seen if characters are scrolling through the screen KV36XBR250 AA 2W Sony KV32V26 serial 8012582 Goes to green retrace lines and then shuts down When it comes back on again the unit will be in the video input mode KV32V26 green retrace lines Tech needs to replace 1C561 D561 amp C5
5. horizontal line at the top of the screen It was a discoloration toward the color yellow when White is displayed Also on the E ea lower corner was a dark circular pattern that did not match KP53XBR45 RA1 SCREEN screen or a scratch between the Lenticular and me curvature a De Frenel ete neue Se a 7 fresnel lens Tech calling in for an authorization for eset iha Antra opaca igit pAr tor Any datena Tag EERE lacameni reported back to me the mirror had a smear completely p across the surface area Possibly caused by a previous cleaning with a cleaning rag that has some oil based contaminate Gently cleaning the mirror corrected the fault TSS Logs for Sony Television Products 1i MODEL KEYWORD SYMPTOM When checking IC901 18 amp 13 and IC903 13 we had no positive voltages that would cause a high voltage protect shut down At no time did we ever get high voltage or i Horizontal drive for the High voltage output Q801 However e a cue a Q505 the horizontal driver for the horizontal output always KP53XBR45 shut down After changing the CRT s and the E board it was pad drive i Whee ne iat steal opines ine discoveredtre et had a lt ymbom oi imediate original circuit board it was discovered that he did not mE transfer the jumpers on CN804 There must be three Sugan jumpers on this connector otherwise the set will never get high voltage CN804 1 amp 2 CN804 3 amp 4 CN804 5 amp 6 Unit needs these three jumpers to route the 2 ABL cir
6. on the CBA are so thin the and no cracks in the board material could be seen the decision was to install a small jumper wire between these two points This corrected the TSS Logs for Sony Television Products Fi MODEL KEYWORD KV36XBR200 AA 2H arcing ee AA 2H FOCUS KV36XBR20Q AA 2H GEOMETRY KV36XBR20Q AA 2H GEOMETRY SCREEN KV36XBR20Q AA 2H TEMPERATURE SYMPTOM CURE The best way to tell if the arcing is related to the HV lead which may be breaking down is to use a high voltage probe Connect the ground to the CRT ground and run the tip of the high voltage probe over all high voltage connections amp wires If an arc is drawn to the probe tip this would mean that a break down in the insulation has occurred This test revealed a break down in the High voltage connection at the High Voltage anode button The silicone sealant did not seal between the HV button and HV cup Cleaning the area around the anode button replacing the anode cap and resealing the connection with high voltage silicone sealant KV36XBR200 serial 9023068Out of focus on the CRT Attempting to move the focus control does not cause the area on the outside of the CRT to change focus Unit inches have a noticeable focus error may have Bad CRT KV36XBR200 Picture is tilted There is insufficient Use part number out of bulletin 379 for the pix tilt correction range in the tilt adjustment coil KV36XBR200 Serial 9016768 Unit has pincushion error o the t
7. 16vdc KP61XBR45 9034307 Unit turns on but goes into Measuring the 200 VDC source the finds no voltage Unit encoun shut down after raster comes on and the set has a has open R859 Unit will need modification listed in bulletin KP61V35 KP61XBR48 KP53V35 needed tech to check the more of the not so common shut down sensors These were D board protect line CN1757 7 E board Protect line CN851 5 and the A board protect KP61V35 Unit will turn on then go into immediate line CN222 4 first had tech remove the CRT sockets from shut down Tech has tried all the normal methods ofeach CRT to prevent phosphor burns on the tubes Next isolating CRT HV block Loss of horizontal or remove the fuses on the D board and remove connector Shidown vertical sweep disconnecting the 200 vdc source CN1757 Then turn on the television It turned on with high voltage from the red CRT All these circuits being voltage and stayed on This indicated the trouble was din the disconnected still did not prevent shut down D board A quick static test of all the post regulators bright screen with retrace lines Unit now has all 291R1 and 281R1 Tech will need to correct the main three CRT burned problem then after corrected the CRT will have to be Sony KP53V35 RA 1 Unit shut down as soon as set is turned on Tech ordered R865 and D814 Unit had torn trace on E board that connects the 200 vdc line because they were shorted After parts were to CN708 7
8. Data on 9 chip to load down the Data and Clock lines and cause this amp 10 of the Jungle IC symptom KV35V35 serial 9011978 Unit flashes bright green Kva5vas AA 2 SHUTDOWN With retrace lines then shuts down When powered Toini has a defective CRT A89LJT8OX back up sometimes the set will be in the VIDEO 1 mode KV32XBR48 Unit get a bright red screen then Tech needs to tap on neck of CRT and see if the symptom is KV32XBR48 AA 2 shuts down looses horizontal sweep then shuts down Unit can aggravated by this action After tech got to the house an be turned on again right awa tapped on CRT it was founf that the Tube was causing the TSS Logs for Sony Television Products Fa MODEL KEYWORD SYMPTOM KV27V22 serial 8004933 Unit has a green screen with slight retrace lines Tapping on the neck of the CRT Due to this trouble suggest that we replace the CRT Mveriee SRUTSDOWN tube aggravates the green drive then the set shuts A68KZJ50X off KV27S40 KV35S40Unit is making a noise internal to the These sounds are apparently caused by loose laminations in zdied television that resembles the sound a fax machine the Linearity transformer It is suggested the tech replace q makes when listening to it over a telephone L511 1 406 607 41 C520 1 101 821 00 002 mfd 500 connections KV27V25 Unit has intermittent snow in the picture zThe tuner pn 8 598 340 20 was replaced Now I instructed the tech to enter the tech mode and set the ID t
9. Line filters T601 and T602 find that we have no AC voltage on the output of T602 but present on the input side Isolating the open coil and removing the defective VDR602 allows the set to turn on and operate correctly Tech will need to replace T602 and TSS Logs for Sony Television Products MODEL KEYWORD KV36FV1 GEOMETRY D KV27S10 D KV27V65 GEOMETRY i n SYMPTOM KV36FV1 Customer is running the television on a DSS satellite system Customer claims the set looses focus in the picture when there is a lot of detailed movement KV36FV1 serial 9046442 Unit has poor focus on left and right side of picture KV27S10 serial 723009 Unit has symptom every time the set looses power the geometry memory is lost VPOS VSIZ HSIZ PAMP drop at least 10 points each When resetting these values and writing them to memory the they will be erased as soon as power is removed KV27V65 serial 8027393 Customer complaint is a slight geometry error or tilt in the lower right hand corner of the screen It causes a symptom of horizontal lines that are not perfectly straight In this case the lines are elevated by at width of 2 horizontal lines This is caused by the 10 megabit throughput limit of the DSS video compression format MPEGS In order for the compression to work correctly the Digitization process only updates the data that is changing Background data is not updated as regularly as the foreground data Hence when everything mus
10. and 15v Appears to have KV32S825 Unit has Bright glow at top of screen the wrong inputs to the vertical output chip Data line shorted KV32S825 uneven brightness Unit had 8 volts at pin 5 of vertical output chip It is to ground The clock line sitting at 5 volts with no clock vertical sweep TSS Logs for Sony Television Products No vertical drive from Jungle chip Data and clock normal LE eens repaired problem KV35V35 Unit has not vertical sweep and no Jungle chip has been replace several times with no effect Suggest the tech try to replace the Charge pump diode and pump up capacitor D561 amp C565 This did not correct the symptom But it was found while moving the wires around the yoke connector the symptom changed slightly But when tugging on the wiring going into the deflection yoke the tech KV36FV1 A VERTICAL KV36FV1 Unit has insufficient vertical sweep and found a significant change in the vertical deflection scan SWEEP vertical foldover at the bottom of the screen There isn t a schematic for the yoke assembly but a small connector inside the yoke housing where the 3 controls were mounted The connector is called P16 It was not soldered very well It had thin solder across the land to the pin but what looks like pin oxidation it from making a good electrical The description sounds like jail bars caused by a ringing in KV32S45 Serial 8047063 Unit has a thin the B to the Flyback transformer It is suggested to insta
11. between the connector CN274 15 and C3578 located inside the combfilter shield located at coordinates C2 on the UY board audio level is dropped down to a lower level to vibrate Suggested customer use external speakers E KV32XBR50 PINCUSHION Ba e ai Unit has narrow picture and hourglasel ozon shorted and R571 open asked the tech go through the ID codes for this unit and see KV35V36 Unit has no control over PIP channels if they were the correct value ID3was 10 ID5 was143 amp KV35V36 The PIP only displays the main channel It wilinat oo t These wera wrong The IG rodas arh Supp cena te change on its own be from IDO ID7 25 55 47 10 155 6 0 After resetting the ID codes the set operated the PIP correctly but still needed to set the PIP chroma phase Sony KV27S822 Serial 8126359 the sound is This symptom is called acoustical vibration It is caused by Picture increased to a 60 to 80 level the CRT will exhibit the sound energy from the speakers coupling acoustically KV27S22 ran ene an effect on the sides resembling a water fall through the CRT frame to the Aperture grille inside the CRT effect It disappears if the audio is muted or if the The vibration causes the aperture grille assembly in the tube TSS Logs for Sony Television Products MODEL KEYWORD SYMPTOM KV32S40 8096389 Customer complaint is when the set is turned off there is a slight noise zip noise from the flyback transformer that lasts for about 2 1
12. convergence CRT board has H stat control have attached the two Service Manual supplements and the SB325R1 However none of them have show this resistor We were able to install a resistor in this unit that was a two 10 megs in series Trimming the value by adding another 10 meg in parallel with one of the other 10 megs we were able to converge the set Original part was not available KV32XBR45 KV32XBR45 KV32TS46 TSS Logs for Sony Television Products KEYWORD CONVERGENCE CONVERGENCE GEOMETRY SYMPTOM Unit has mis convergence of red and blue vertical lines They are displace horizontally Tech replaced the CRT without correcting the symptom Unit has nis convergence of red amp blue vertical lines which are displaced horizontally Tech replaced the CRT This did not solve the problem Unit was dead has shorted horizontal output and shorted Q601 amp Q602 components in power supply replaced After replacement unit will turn on but still has no secondary voltage output of power transformer All relays click but no high voltage Has sound Unit is trying to constantly adjust the vertical height and horizontal size intermittently R789 open H state not operational What I m finding is a resistor that appears to be open on this C board It is R789 The value cannot be read nor is it listed in the ESI software parts list Trying another value from 10 to 20 megohms This resistor is in the ground return of the H
13. flawlessly in the video input mode This the entire screen The pattern consists of approx really can only have 1 cause which will be the tuner It was 16th in lines that are interlacing kind of a basket not mentioned in the first assessment of the symptom that it weave look also had a roaring in the audio at the time of the line paring of basket weave interference across the screen Unit had bad tuner asked the tech to remove CN501 from the G board and try starting the set up again The set turned on and developed high voltage Tech did not follow instructions in the bulletin 396 This area was covered in detail in the class Unit has a shorted Red CRT and burned video driver IC on the CR board Tech will need the CRT and the RED tech needs to inspect the filament winding continuity at CN766 5 amp 4 at the blue CRT socket with all CRT s KP61V45 R ET KP61V45 serial 9000412 Unit has no raster Unit disconnected This resistance should be around 1 ohms In appears to have high voltage but no filaments this case the unit was 53 ohms instructed the tech to check into filament winding and R569 Quick check of Q569 found it had increased in value to over 50 ohms It is supposed to KP53V75 serial 9008493 Unit is not turning on no High voltage The power supply turns on but it will not develop high voltage KP41T35 Unit has a symptom of an uneven pattern covers the entire screen It consists of This symptom is known as line paring
14. had a leaky Q706 Q733 defective TSS Logs for Sony Television Products MODEL Chassis KEYWORD SYMPTOM Monitor the cathodes of each CRT at the instant of turn on All cathodes were close to 186 volts But as soon as the raster appeared the voltage dropped to 89 volts This indicates the CRT s are in saturation During this test the 200 volt source was still is running nearly 200 vdc The IK lines are causing this problem Measuring the IK line at the CG board at CN731 1 we measured 5 volts DC as soon as we turned on the set After the picture appeared the voltage did not change NOTE on a working set this voltage should be near Zero volts as long as there is 0 beam current Each cathode had a normal IK pulse of 38 volts The IK Buffers on each board are very hard to get to so another plan was develped to check these devices The following transistors are the IK buffers Q733 CG board Q764 CB board amp Q706 CR board They are hidden by a heat sink for the Video output transistor This unit had a leaky Q733 KP53V80 serial 9007644 Once the set is turned on the raster will appear as a bright screen with video KP53V80 RA3 BRIGHT RASTER but the brightness is intense There are no retrace defective Q764 Is leaky lines The set does not have any On screen display sound OK KP53V80 serial 9004624 Once the set is turned on the raster will appear as a bright screen with KP53V80 RA3 BRIGHT RASTER video but the brightness is
15. intense There are no retrace lines The set does not have any On screen display sound OK TSS Logs for Sony Television Products p MODEL KEYWORD SYMPTOM CURE Monitor the cathodes of each CRT at the instant of turn on All cathodes were close to 186 volts But as soon as the raster appeared the voltage dropped to 89 volts This indicates the CRT s are in saturation During this test the 200 volt source was still is running nearly 200 vdc The IK feedback lines are causing this problem Measuring the IK Pa pena a pres inet umes et line at the CG board at CN731 1 we measured 5 volts DC the raster will appear as a bright screen with video KP53V80 RA3 BRIGHT RASTER But the brightness is intense Tech replaced the TE SOOT ais ee eee tas ne piers Bee acd sais 3 the voltage did not change NOTE on a working set this A board which did not cure the symptom The set HENTE does not have any OSD either voltage should be near Zero volts as long as there is 0 beam current Each cathode had a normal IK pulse of 38 volts The IK Buffers on each board are very hard to get to so another plan was develped to check these devices The following transistors are the IK buffers Q733 CG board Q764 CB board amp Q706 CR board They are hidden by a heat sink for the Video output transistor This unit had a ata Pale bal ane a ee On this chassis all of the sub deflection yokes are protected _ by fuse links The fuse for the blue vertical sub def
16. ion the projection television will be destroyed requiring them to be replaced Replacement cost is over 800 00 Be aware Do not leave any Projection television ON with a stationary picture Just like screen savers are used to keep the computer monitors from leaving an imprint There is a burn in the center of the green tube Tech will need to replace the GREEN CRT Tech also needs to follow KP61V45 Unit has a purple dot in the center of the the directions for the CRT module upgrade Bulletin 380 colored spot _ picture Can be seen in when there is a white Addition of a 1SS83TD diode between Anode R708 and screen cathode to IC pin 6 In the event the IC is not available the CRT driver board is CRT generic is O7MAC2 G The possible subs are 8 733 494 05 8 733 561 05 and 8 733 KP41T25 Ra KP53V45 i KP53V75 TSS Logs for Sony Television Products p MODEL KEYWORD CONVERGENCE CONVERGENCE convergence convergence SYMPTOM Sony KP41T65 Cannot converge set Technician replaced all microprocessors EPROM and Convergence output IC s without effecting a cure KP41T25 Red convergence will not write to memory When convergence is properly aligned red horizontal lines will migrate up or down after time KP53V45 serial 9011383 Unit has no convergence control All dimensions are way out of adjustment and have no effect when adjusting the values of the convergence parameters KP53V75 Unit has and intermittent
17. no control over the Red or blue Horizontal centering for the customers convergence adjustment Unit has preglow at the instant the television is turned on The preglow shows in the lower left and right hand corner and stays until the raster appears KP41EXR96 KP46S55 PR53EXR19 KP46S55 KP53V15 AP AP AP AP p TSS Logs for Sony Television Products MODEL KEYWORD DEAD SYMPTOM KP41EXR96 unit dead Will not power up But will turn if the convergence board is disconnected KP46S55 serial 9104007 Unit is a dead set Unit has an extremely hour glass picture Q508 getting very hot KPR53EXR15 Unit had no power Unit has Q603 and Q614 are shorted When all are replaced only Q614 shorts Unit is a dead set Unit has an extremely hour glass picture Q508 getting very hot Unit is dead Will not turn on Just shuts down The 15 or 15 volt supply was missing Diode D605 shorted Tech should check all devices on the and 15 volt supply line as well as the 4 post regulators on the D board Tech found a shorted C1742 located on the D board It connects between the 15 and 15 regulators IC905 IC906 Tech needs to check the B on the emitter of the Horizontal output Tech will need to check the areas around the Q508 and it s drivers It was found the voltage was normal but Q508 C was at 106 vdc Further visual inspection on the driver Q507 found ring fractures in the solder connections in this circuit While
18. power supply PM501 1 810 061 21 amp IC601 1 810 PM501 was to culprit in this case Sony KV32XBR45 Unit has a very faint picture But There is video at the base of Q401 but not at the emitter the OSD is fine Problem shows up in the tuner Q401 measures 9 volts on all elements Base must be 4 5 Bsa ee Ava WEAS VIDEO and video input mode Tech ordered Q401 but did volts Transistor is in cut off Bases and emitter are the same not correct the symptom 9 volts Unit has open R617 a 680 ohm resistor TSS Logs for Sony Television Products MODEL KEYWORD SYMPTOM The hum is a result of magnetic flux from the vertical KV32S40 serial 9028282 that has a low level deflection yoke The 60 hz is radiating into the low level audio hum in the video input or tuner mode audio circuits through inductive pick up from lead dress and KV32S40 AA 2 A C Hum oe ground loops To minimize these Remove JW086 and Looked in the FPR on web site but could fine nothing on the subiect The hum isat 60 Henz JW1007 Add 22AWG wire from JW270 to ground side of 9 ee R477 This wire should be on the top side of the A board and 820 mfd electrolytics in a voltage doubler configuration This causes a tremendous amount of in rush current that may KV27V10 AA 2 draw several amperes until the filters are charges up This will cause a contact arc the moment the set is connected to the AC line This set poses no more fire hazard than any other electrical device that plugs into the AC outl
19. remote control Front panel controls are operating OK KV32FV1 serial 9002390 Main tuner will not tune any channels but the PIP tuner is fine Tuner was changed without any change in the symptom Set just displays snow on all channel from the main tuner and the OSD for main channel display is normal Unit has 0 volts on the output of the IR receiver 1C2001 1 This should be 5 volts as long as it is not receiving data Customer has an RCA DVD player connected using the S video input and the S Link too Sony s S Link is not compatible with RCA s G Link input used to control operational functions Disconnect the S link G link connections and restored operations Unit has 0 volts on the output of the IR receiver 1C2001 1 This should be 5 volts as long as it is not receiving data Customer has an RCA DVD player connected using the S video input and the S Link too Sony s S Link is not compatible with RCA s G Link input used to control operational functions Disconnect the S link G link connections and restored operations had tech check the B on the tuner that are stamped on the board The 9 30 amp 5 volts are normal The SCL line is only 2 volts and the SDA line is 4 6 The SCL line is the trouble Tech did not have an oscilloscope but since the SCL line for this tuner is the same for the PIP tuner we concluded the CPU was not at fault There appeared to be an open between the SCL of the main tuner and CN1101 6 Since the traces
20. sits in an enclosed oak cabinet no doors in a bedroom with tile floors One can here a pin drop in this room This set is operating This phenomena is normal and is caused by the IK pulses that are produced at the instant of turn on Even thought the cathodes are not completely warmed up there will be a slight amount of beam current produced by just the IK pulses Since these pulses are at the top portion of the tube or on the curved funnel portion of the CRT this symptom is common and is not considered a defect in the CRT don t know what the latch time is for the Degauser relay thought that it was a bit excessive But even though the latch time is excessive the posistor THP601 should increase high enough in resistance to drop the degaussed current to minimum levels The trouble was corrected by replacing the THP601 the aperture grill has No magnets appear to have moved into a position that would this effect It cannot be adjusted out It has been determined the CRT needs replacement TSS Logs for Sony Television Products SS ewoo ee ee KV27V22 Serial 8049735 Unit has red screen pauline teats Se lege epee Sele CRT Due to this symptom and the intermittent nature of the KV27V22 AA 2 RASTER Tapping on neck of tube causes the picture to if trouble suggest that we replace the CRT A68KZJ50X return to normal Tech could not duplicate the trouble again After this the set ran fine When raising the G2 voltage it was discovered t
21. stat resistor that is installed in the CRT Tech needs to try different values to try and make this set converge horizontally This TV converged with a 10 megohm resistor Suggest tech look for R789 and see if itis open It is on the on C board The value is around 10 meg There are two different chassis and CRTs used for this model If they have the older chassis type that requires H stat convergence CRT board has H stat control they need to order the older CRT as per the manual If newer type No H stat then the new CRT as per Service Manual supplement 1 is needed CRT 8 733 743 05 The H Stat is done using the Yoke ring magnets Tech needs to check the condition or RY602 RY602 is the switching relay that turn on and off the set The relay is HOT switched In other words one side of the relay is connected to power oscillator output that runs nearly 350 vac Peak to Peak at 90Khz Once the relay is closed this energy is placed across the power output transformer and provides the drive necessary to produce the B Measuring the input voltage of the relay to HOT ground found it to be 150 volts DC mode But on the other side of relay we has 3 volts DC mode Unit has defective RY602 relay When monitoring the E W Pin output of the M board the signal was very instable It was decided to replace IC351 the Jungle IC This corrected the trouble KV32XBR85 KV32XBR250 AA 1 AA 1 AA 1 A 1 TSS Logs for Sony Television Products MOD
22. then the fuse Checking Q5001 we do not find a short between Drain and Source Suggest the tech remove the MOV and replace the fuse and try operating the set It operates fine Suggest the tech replace the MOV but disable the television until the MOV can be replaced since the MOV is a Protection device in the event the Power surge returns NOTE It was discovered the VCR was also dead which not was not evident at the time of the call This confirms the power surge theory VDR5050 1 801 074 41 F5050 1 576 193 11 6 3 amp 125vac TSS Logs for Sony Television Products There are apparently no shorts circuits on the secondary of the main switcher supply However when trying to discover why the IC601 was shorted we could not find any evidence of line surges that might have shorted the VDR601 or open KV27V40 B Unit is dead Only the Timer LED flashes R618 But when checking the secondary of the Flyback transformer at the outputs of D560 and D561 we found nearly 4 6 ohms from the 13 to the 13 volt source Floating KV27FV15 Unit has Unit has a symptom when it is on Channel 4 KNBC Los Angeles the set will KV27FV15 B INT RASTER display a normal picture then get brighterand er Needs to enter the tach menu mods and change the values of CDMD to 1 and VSS to 3 brighter then go to a no raster symptom with sound 10541 28 amp 4 removed the shorted condition Unit has a Checking all the MUST HAVES I found that all B s were normal on t
23. volts KP46S15 RA1 no turn on Click be heard from the G board when the Checking with an oscilloscope we found 22 volts peak to power is applied or when the power is turned on peak on the input of the regulator Unit had defective C667 a 470mfd 35 vdc Replacing the capacitor corrected the TSS Logs for Sony Television Products MODEL KEYWORD SYMPTOM CURE Checking the ID codes in the set wee found all id codes KP53825 Unit will play then it will go to a slight correct except for ID4 it was 64 instead of 80 Resetting the KP53S25 RA1 OSD green picture the channel displays will come on code to 80 caused the set to loose raster and enter the video automatically input mode We let it do that and initialized the EEPROM Everything operated correctly after that point Sony KP61XBR48 Unit has rainbow colors in the Rainbow caused by the speaker wire casting a shadow in the lower right hand corner amp when the power turned light path from the projected image Tech needs to reroute a7 i aed Bae off using the power button on the television the set wire Next tech will need to install a 2 2 mfd capacitor across will not shut off the power switch ial Unit has no high voltage E board is wet from glycol coolant KP41T15 RAT RASTER TATS Onitis tring on Timer light faches at ac from the Fed and Blue CRT s that are leaking Redan turn on and set will have sound but no raster Blue tube The defect as the tech explains showed up as a straight
24. which connects to the CR board Apparently the installed a new symptom was evident Unit turns traces were accidentally torn in the process of moving the on but enters shutdown after the tube warm up chassis around Repairing the traces corrected the symptom CRT s get bright with ret KP53815 Unit has a green smear When tapping on green CRT the picture the picture will smear Tapping Pix flashes upside down then back to normal This defective Jungle ic301 SHUTSDOWN KP53S15 8 z KP46S25 MODEL KP46S25 KP53S65 Chassis RA1 RA2 KP53V45 RA2 KP53V45 RA2 KP53V75 RA2 TSS Logs for Sony Television Products KEYWORD wrong color arcing audio SYMPTOM The picture turns a reddish or pinkish cast after 20 minutes This is intermittent Pix flashes upside down then back to normal This takes about 20 defective Jungle IC chip IC301 minutes but can be accelerated by heating the IC301 with a heat gun had tech disconnect all connections except to the variable fixed output to the rear of the set while in the condition mentioned in the first complaint After all other Sony KP53S65 Cust has two complaints 1 Unit inputs to the set was disconnected the CATV connection was has low level AC hum when using an external amp the only connection remaining When it was disconnected connected to the variable fixed or the monitor the hum disappeared This indicated the trouble is caused by outputs of t
25. white is readily available is on the PIP module They are marked C OK Also no Chorma while using the PIP Sound IN amp C OUT on connector CN501 1 amp 5 We have chroma eee BOER and On Screen Display OK Initializing EPROM going into the PIP board but nothing coming out Jumping does not change the effect these pins together with a 1 mfd capacitor caused the color to return as long as the capacitor was in place Unit has bad KV32XBR48 no chroma PIP Sony KV32XBR48 No chroma in PIP X3304 On PX board not soldered PIP TSS Logs for Sony Television Products MODEL KEYWORD SYMPTOM CURE KV27S825 serial 811908 Unit has no High voltage LED in front is flashing on and off after power up There does not seem to be any horizontal drive to the Horizontal drive transistor Defeating the KV27925 NO HIGH Horizontal output by removing the collector Looks like the tech has a bad IC351 CXA2025AS A second VOLTAGE connection still will not allow Horizontal drive to Jungle IC corrected the problem appear at 1C351 37 This pin is sitting at nearly 8 5 volts not the 3 volts it is supposed to be Also 1C351 38 the HOFF AFCPIN is at 3 3 volts which is normal tom the linale IC told us we were looking at a shutdown symptom Checking ie all secondaries we found nothing shorted Replaced flyback which corrected trouble The horizontal driver has tremendous amount of ringing on it Does not change if we remove horizontal output transistor The tr
26. will shut off the problem All remote control functions return to normal and so did the keyboard functions TSS Logs for Sony Television Products MODEL KEYWORD SYMPTOM CURE After first turning on the set the cathodes of the CRT are Unit ailita on but nothave any raster unilthe measured with an oscilloscope An interesting fact that after i ny the set is turned on there are no visible IK pulses on any of channel is selected The LED in front flashes indenne untilthe channels selected AAEEG the CRT cathodes IK pulses only appear when the channel KV36FS10 AA 2 System control y T is addressed with the remote or the Channel up down channel is selected the set will run fine the rest of ne SACA f command on the television Initialization of the EEPROM did the day The unit has high voltage filaments amp air neeo da e no ra ondon not correct the symptom No incorrect values found in the P 9 alignment parameters Only by elimination was the trouble found to be in the EEPROM will need to split the cable before it gets to the CATV box and deselect any VCR or CATV box questions by answering NO to questions about them in the initial setup The IR blaster is used to communicate from the television to the CATV box in order for downloading to occur If the IR i blaster is not used the feature will remain inoperable because a a ae when the set downloads the data it must find the host channel It uses the IR blaster to chan
27. 0 of a second The customer exchanged the first Sony for this trouble But the symptom was also in this TV too The customer tried two of the same models and claimed they did not here this noise when they heard it at the store KV32S40 Power supply chirp KV27S22 KV27822 serial 8091271 After the unit is turned on and the picture is on there is evidence the degausser is still running for about 5 seconds after PURITY the picture comes on There seems to be a 18 second delay before the Degaussing relay unlatches There is only a 10 second delay for the picture to appear after power up error in the lower right hand corner of the picture KV36FV15 serial 9026985 Unit has in the lower KV36V15 A PURITY left corner the tube has a sever convergence and purity error KV27S45 KV35S40 Unit has preglow at the instant the television is turned on The preglow shows in the Beg preglow lower left and right hand corner and stays until the raster appears AA 2 AA 2 AA 2 AA 2 A 2 This noise is normal due to the fact the set does not shut off the Main B from the main SMPS What is turned off is the 9 volt source from IC642 in the G board As the voltage decays the there may be a slight phase shift in the horizontal drive signal as soon as the 9 volts begins to drop The reason the customer could not hear this symptom in a store is due to its acoustics The store is far noisier and carpeted walls and floors In the customers home the set
28. 1 T 935 001 61 per bulletin CLOSED the closed caption mode if using the DVD player R329R1 After replacement the tech will need to enter the KV27S820 AA 2 CAPTION However if the television operates in the tuner tech menu and select CRIW and change it from 15 to 3 mode for over the air telecasts closed caption Also check the LBLK must be 7 RBLK must be 7 and works fine HBSWO must be 0 At this point save the new data and The tech needs to set the ID codes to the following ID0 25 ID1 19 ID2 47 ID3 0 ID4 27 ID5 3 ID6 0 ID7 0 If KV27V20 AA 2 CLOSED KV27V20 8015729 No closed caption on premium these are OK then the tech will need to replace the IC001 CAPTION channels with an upgraded version per bulletin 329R1 Original generic is CXP85640 004S the new generic is CXP856P40S 1 part number T 935 001 61 D CAPTION closed caption on premium channels device is CXP85640 006S D CAPTION caption on premium channels 006S CPU was replaced and did not correct the symptom KV27V20 KV27V20 KV32V15 KV27V22 AA 2 AA 2 AA 2 A 2 TSS Logs for Sony Television Products MODEL KEYWORD CLOSED CAPTION CLOSED CAPTION color banding CONVERGENCE SYMPTOM No closed caption on premium channels Sony KV27V20 unit has intermittent symptom of closed caption coming up on screen Cust claims they cannot turn off the closed caption option Sony KV32V15 serial 9013716 AA 2D Unit has horizontal banding of purple and red a
29. 1T65 KP41T65 KP41T65 KP46C36 KP53S25 RA2 RA2 RA2 RA2 RA2 A2 TSS Logs for Sony Television Products MODEL KEYWORD SYMPTOM KP41T65 serial9515238 Tech needs CRT KP41T65 9515238 Needs Green CRT Tech originally ordered the Green CRT by using the tag on the original tube which is A 1501 372 A What he received is a A 1501 373 A which is a blue KP41T65 serial Needs blue CRT Tech originally ordered the blue CRT by using the part number from service bulletin 359R1 What he ordered is a 8 733 539 05 is a A 1501 373 A which is a blue KP41T65 The tech is trying to replace the Red CRT but has received the wrong tube Tech ordered from the service manual a 8 733 539 05 But it is the wrong mounting structure and will not fit in the opening of the KP46C36 Serial 9005538 Unit has a burn in the blue CRT The unit has an excessive afterglow once the television is turned off The after glow is only blue No other colors have this afterglow KP53S825 serial 90222755 Tubes are burned from the PIP screen being on the screen for an excessive period of time CRT Tech is receiving the wrong tube the most recent tube to be received is A 1501 369 A which is a blue CRT The first wrong tube was A 1501 373 A also a blue CRT Tech is getting the part number off of the tube frame and not out of the service manual As long has he is using that number he will always get a blue CRT I m not sure who subbed the part but the corr
30. 21 sound but no OSD or PIP Checking the G2 voltage at each CRT it was discovered it was only 82 volts on all tubes The G2 wires to each tube KP53XBR45 serial 9017298 Unit has no raster were disconnected and measured the free end and it was still Led in front is flashing Unit does have High only 84 volts The output from the flyback T801 MV KP53XBR45 RA no raster voltage and sound There is an IK pulse on the supply voltage for the Screen Focus block was 12 000 cathode of each CRT but it is too high over 90 volts This is normal Disconnecting the G2 wire that leads volts PP The G2 voltage is too low over to CN882 1 allows the picture to come on but the G2 supply only increases by a few volts It has been determined by these tests that the Focus Screen High Voltage resistors KP53V25 Unit will not turn on Shorting the Emitter and base of highvoltage output allows the h drive KP53V25 RA1 NO TURN ON _ to appear at the collector of the h driver transistor Anode 1 900 21 1 34 short link for anode lead Update unit had bad flyback Anode lead will not come out of flyback Must replace lead link fro ee F601 amp f602 are open Factory upgrade Replace C815 KP53XBR45 NO TURNON Sony KP53XBR45 unit is not turning on C897 858 amp 889 from a 1000mfd 35 vdc to a 470 md had the tech measure the Standby B at the input of KP46S15 Unit will not turn on At no time cana IC652 1 The voltage should be 24 vdc We only had 9
31. 22 When HSIZ is set to AA 2 SWEEP sweep The sweep is reduced by 10 to 15 on the 48 Q512 C will drop to 16 volts The set will have full sweep left side and 2 5 on the right but it has a slight foldover condition on the right side of picture It is recommended the tech replace the retrace capacitors C511 amp C513 and the Yokes capacitors C518 amp C515 Tech replaced all of the capacitors and the symptom KV32S40 ser 8053998 Unit has sever over scan of AA 2 horizontal sweep horizontal sweep Tech replaced Q512 Shorted and Q511 open all elements HORIZONTAL Poor 1 sotial 202668 Uni has aiseverovel Tach nesds to check on Lei Q61 0519 C514 D502 amp KV36FV1 AA 2 scan condition for horizontal sweep Tech did not SWEEP FEBRE D504 One or more of these are shorted measure any voltages in the pin amp circuit KV35V75 AA 2 HORIZONTAL Unit has shorted L511 and Q512 Tech replaced _ Tech needs to replace D503 D502 D504 and C511 C512 SWEEP these items and they burn out again the retrace capacitor along wit the other components TSS Logs for Sony Television Products Fa MODEL KEYWORD SYMPTOM CURE had tech short the CN1761 1 2 3 amp 6 together This should give a perfect black ee white picture But when this was shorted we had a black and white picture but the picture KV32S26 Unit has a brighter than normal picture still was flashing Since the jungle IC was already replaced it KV32926 Int Raster When G2 is low
32. 4FV10 Unit will shut down immediately after When monitoring the VP at IC001 18 only 1 volt peak to KV24FV10 shutdown turn on But the unit will stay on if the service peak was measured Floating 1C001 18 allowed the voltage mode is entered to return to 5 volt PP Replacing the IC001 corrected the KV32822 serial 8055057 Unit will run fine for sese me somn 15 30 minutes with sporadic arcing then it will Unit needs replacement CRT 8 733 741 05 suom i down with a bright green flash KV32840 Unit will turn on and immediately shut Severing the 135 B line and placing a 40 watt bulb in series with the supply were are still getting the same symptom but down It does get high voltage briefly Appears to ie Fes Eni E Gr Gurren eheiicen Wa cinta eL the Light illuminates brightly We began to disconnect the KV32S40 shutdown g flyback loads D530 D531 After disconnecting these we the collector of the horizontal output appears i Se found the set will run with D530 disconnected Checking this normal Horizontal drive is normal if the horizontal Sree device it passes the static check This component is the 15 A EE volt source It was suggested to replace D530 This corrected KV32S65 Unit goes into shut down Will allow HV Open coil that supplied the B to the audio controller and to com up but goes into immediate shut down buffer chips This loss in voltage caused the audio processor RveeSos ne sutaan S a time did we ever have
33. 61XBR45 RA AUDIO amp is connected to the Line outputs the set will necessary for the audio to turn on Tech needs to check the produce line level audio to the external amp condition of the 4 fusible resistors in the 18 amp 18 volt supply R1217 R1273 R1297 R1295 MODEL KP53XBR45 KP53S35 KP53XBR45 KP61XBR48 KP46S15 TSS Logs for Sony Television Products KEYWORD control panel control panel Di A1 A1 A1 A1 RA1 SYMPTOM KP53XBR45 serial Unit has history of the GB board shorting out the switching transistors in the switcher supply Q1201 amp Q1202 short with R1206 opening By simply replacing the transistors and C1210 C1211 C1212 and C1213 the power supply will run for 3 to 5 weeks then short the switching transistors again The customer explained that they lost audio while the set was playing The sound quality was normal up until the event that took place to short the switching transistors This has happened 2 times Tech is wondering if there are any other case histories regarding this symptom Sony KP53S35 Unit has poor chroma of the main picture Sony KP61XBR48 When the power button is pushed in the set will shut off then turn back on again Sony KP61XBR48 When the power button is pushed in the set will shut off then turn back on again KP46S15 serial 9013364 Unit has leaking CRT Unit has convergence Both red and green CRT are leaking coolant leak Damage is localized to just th
34. 65 This auto feature can be turned off but only in the Service Mode Change ID7 from 9 to 8 This is the No Auto V Customer must now select modes manually on their DVD player Tech needs to change the value of C553 from 33 200 vdc to 47 250 vdc part number 1 117 667 71 This improve the linearity in that are of the screen The CRT is A80JYV51X The cathode voltages at red and blue cathodes are 156 but the green cathode is 22 When the socket is disconnected the green cathode supply jumps to 153 vdc The CRT is defective TSS Logs for Sony Television Products MODEL KEYWORD SYMPTOM CURE Unit had small ring fractures around the vertical deflection KV27TS20 ANU vertical Pya head Unit haa highiy mterminam veanieal yoke connector pins on the chassis Resoldering the foldover mostly at the top of the screen connections corrected the symptom KV32XBR10 ANU1 AUDIO ites ro audo 8 741 592 2 8 741 100 56 original number SBX1592 02 corrected the symptom Sony KV27XBR15 ANU 1 chassis Unit is dead Horizontal output is also shorted This unit requires a Unit had all 3 regulators loose All had ring modification to the horizontal output section KIT T 998 566 KV27XBR15 ANU1 dead fractures Once resoldered the set still did not turn 41 This Kit consists of a 2SC4927 and a 68 ohm resistor on because of a short to ground on the 135 vdc that must be used in the emitter of the horizontal output line transistor Further visual ch
35. A 2 ARCING ee serial se TSS TUBE ARON MY cat wil nosa ORT ACOLITAOKE KV27V65 KV27S45 KV32S65 KV27S20 KV27S36 TSS Logs for Sony Television Products MODEL KEYWORD AUDIO audio SYMPTOM Audio level adjustments will not increase in a linear A new microprocessor is available for this unit It is part fashion instead the audio will increase rapidly in the first 1 3 of the bar graph KV27S45 serial 8046950 Unit has a very rapid change in volume when increasing the level from minimum to 4 notches above minimum KV32S65 Serial 8014575 Sound and picture is fine but when the fixed or variable audio out is connected to an external audio amp and the set is muted a loud pop is heard in the right channel Sony KV27S20 Unit has a low pitch whine in the left audio channel Sony KV27S36 Unit has choppy SAP audio Stereo 0 K number T 998 600 32 It replaces the original IC001 which was M37273MF 251 Tech needs to add a resistor in parallel with R432 to effectively reduce the value of R432 This changes the voltage divider ratio to the volume control circuit and makes the volume circuit more linear in operation had the tech try to measure if there was any DC voltages that resided on the Variable audio output connectors There was 4 5 volts on the Right channel and 0 volts on the left channel When the Mute transistors on the variable line triggered they pulled both lines to ground When the external amp was con
36. A 2 chassis Unit is dead Tech voltages at IC601 were 340 volts E1 and B1 were always KP53S35 RA2 DEAD ordered Q601 in the G board power supply 0 One of the soft start resistors R614 was open R612 section No change in the symptom R613 R614 amp R615 are responsible for the initial start up of this power supply KP46C36 serial 9010238 Unit has shorted horizontal output transistor for the third time All three CRT s have been replaced two months ago Unit has shorted horizontal output transistor G board must KP46C36 RA2 DEAD All has been well up to this point The set failed be replaced as a complete assembly Also all three CRTs are again now we are faced with changing the CRTs __ burned again again but we are at this point are going to replace the G board in its entirety KP46C36 serial 9002356 Unit is dead C608 the __ It apparent the television either had a significant A C line KP46C36 RA2 DEAD main raw B filter capacitor is vented along with _ voltage surge or C608 just took this time to blow Either way IC6601 shorted the tech should replace C607 amp C608 along with IC601 Tech did not measure any voltages on the G board These KP53V75 Unit is dead Will not start up Just has must be confirmed before we can possibly know where to go the flashing red LED on the front of the set looking for what might be wrong It is possible nothing is KP53V75 RA2 dead Disconnecting the connector CN501 which shorted in the po
37. Chip reinstalled and the set operated Ea MODEL KEYWORD KV27V40 KV27S40 KV27S45 TSS Logs for Sony Television Products SYMPTOM KV27V40 8112963 Unit is dead Only the Timer LED flashes KV27S40 Unit is dead Will not turn on LED flashed 5 time The set will latch the relay but will not develop secondary voltages from the main power suppl KV27S45 VDR5050 Unit dead Inspection of the chassis discovered there is no stand by voltage Inspecting the E board found that the fuse F5050 was open and the VDR5050 had a chunk of material blown off of it There are apparently no shorts circuits on the secondary of the main switcher supply However when trying to discover why the IC601 was shorted we could not find any evidence of line surges that might have shorted the VDR601 or open R618 But when checking the secondary of the Flyback transformer at the outputs of D560 and D561 we found nearly 4 6 ohms from the 13 to the 13 volt source Floating 1C541 2 amp 4 removed the shorted condition Unit has a shorted vertical output 1C541 shorted from the 13 volt to the Checking the secondaries of T603 we could not find any short circuits on the se The needs to connect a variac up to the television and supply 18 volt AC A jumper need to be installed across the contact connections of RY602 in the A VDR5050 is metal oxide varistor It is in parallel with the AC line voltage It appears the customer had a AC line source that blew the MOV
38. EL KEYWORD KV32TW77 KV32XBR37 No high voltage NO RASTER NO RASTER SYMPTOM Sony AA 1 chassis Unit no high voltage or sound RY602 latched at turn on Tech replaced the flyback and Q601 Q602 VDR601 VDR602 VDR603 amp R607 After theses components were replaced the unit still did not produce secondary B Only 3 volts on the collector of the Horizontal output KV32XBR327 serial 80139945 Unit has no raster Has sound CRT filaments and high voltage Led in front is flashing KV32XBR85 Unit has no raster Has sound and weak OSD Stand by light is not flashing Sony KV32XBR50 This customer has a Goldstar 8mm VHS dual deck VCR located under this television on the built in shelf When customer uses the 8mm deck the playback of the tape has corrupted audio and poor tracking performance when played back on this television Inspected the Power oscillator and discovered that it was running and producing 167 volts DC at the input side of RY602 but a lt 13 volts on the low side Jumping RY602 restored High voltage Unit had a bad RY602 relay in the power supply Tech may have a IK failure When bringing up the G2 the raster will appear with full vertical sweep and a purple screen Not much green Tech needs to look at the IK buffer collectors on Q771 Q772 amp Q773 Normally with beam current there shall be about 1 volt on each collector With the CRT Socket removed all collectors must drop to 0 volts Q771 did not
39. It was 1 2 volts regardless if the tube was connected or not Tech needs to short Q771 E amp B and see if the collector will drop It did not TV will need a replacement Q771 Replacement cured the symptom Unit appears to have a normal IK feed back to the jungle IC Screen voltages are 670 vdc and the cathode is running at 180 vdc Unit looks like a defective Jungle IC Replacing the Jungle IC corected the symptom The design of the 8mm format is significantly different from that of the VHS The 8MM format does not have any stationary heads and completely relies on the signals from the rotary video heads on drum 4 ATF Auto Tracking Fix carriers are recorded on to the tape Apparently the shielding in the 8 mm VCR this close proximity to the TV and the lack of shielding in the Sony TV caused the corruption of the 4 ATF signals Placing the VCR on the bottom shelf of the TV cabinet corrected the symptom TSS Logs for Sony Television Products MODEL KEYWORD SYMPTOM CURE Tech needs to look into the Data amp Clock lines of the chassis KV36FV15 Unit will tum on with the front panel These lines must be 5 volts peak to peak and have a typical control but the set will not develop raster or sound word length of 1000 milli seconds Tech discovered the SDA KV36FV15 RASTER i pulses were 3 3 volts peak to peak whereas the CLK pulses The high voltage will turn but no raster After 3 i E E E mill aecear were at 5 volts Tech had to isolate e
40. K MODEL KP53V80 KP53V80 TSS Logs for Sony Television Products Chassis KEYWORD SYMPTOM KP53V80 9001186 Unit goes to a bright screen then the set may shut down or just operate with an extremely bright picture but no retrace lines Unit has no ON Screen Display and the sound s OK RA3 BRIGHT RASTER KP53V80 Serial 9000364 Once the set is turned on the raster will appear as a bright screen with video RA3 BRIGHT RASTER but the brightness is intense There are no retrace lines The set does not have any On screen display sound OK Monitor the cathodes of each CRT at the instant of turn on All cathodes were close to 186 volts But as soon as the raster appeared the voltage dropped to 89 volts This indicates the CRT s are in saturation During this test the 200 volt source was still is running nearly 200 vdc The IK lines are causing this problem Measuring the IK line at the CG board at CN731 1 we measured 5 volts DC as soon as we turned on the set After the picture appeared the voltage did not change NOTE on a working set this voltage should be near Zero volts as long as there is 0 beam current Each cathode had a normal IK pulse of 38 volts The IK Buffers on each board are very hard to get to so another plan was develped to check these devices The following transistors are the IK buffers Q733 CG board Q764 CB board amp Q706 CR board They are hidden by a heat sink for the Video output transistor This unit
41. KEYWORD SYMPTOM CURE KV32SR10 ANU 2 ae KV32SR10 Unit has dark raster with flaring across the picture pi KP61V15 ARCING TV will turn on but the Front panel LED will continually blink on and off Unit gets high voltage but has a lot of arcing around the High voltage distribution block Unit does have sound and has vertical sweep The chassis is heavily corroded due to the environment Unit is located next to an open window that receives ocean spray from the surf KP53XBR35 Unit has symptom of when the volume up is activated the channel down is activated instead All other buttons act normally on this analog string Tech did not check the other analog string which is where the Menu and display key gt a KP46V15 CONVERGENCE KP46V16 Unit does not have control of Red horizontal centering KP53V15 serial 9011915 Unit was serviced by another service vendor Unit has a pulsating red convergence Measuring the G2 voltage at 1000 vdc source for the G2 only finds 62 volts R519 is open Replacing R519 a 2 2K resistor amp D501 After closer inspection tech found the focus screen block assembly wires were falling off of the assembly Cleaning the connections with water and thoroughly drying the connections then resoldering them to the block assembly corrected the fault There are two identical analog keyboard voltage dividers attached to the KSENSO amp KSENS1 lines to the microprocessor The should act identical in ope
42. MPTOM CURE Unit has burned A board on the corner 1E coordinated This KP53XBR45 KP53XBR45 serial number 9017123 Unit is dead circuit is for the dynamic focus output and the 3 horizontal KP53XBR45 The set went up in smoke Customer unplugged deflection yoke drives The corner is completely burned away the set and called for service from the A board Tech will need a replacement AA board A 1297 540 A Tech needs to look at the vertical pin correction signal on the A board CN304 5 This signal must be about 1 volts peak to peak of a vertical parabolic waveform riding on a 2 7 volts HORIZONTAL KV53XBR45 unit has horizontal overscan DC level If the voltage is significantly over three volts the Pincushion ciircuit will saturate and damage will occur If the voltage is too high too low or missing the Parabolic wave the Jungle IC should be suspect parabolic drive signal at R501 on the A board Install a de bouncing capacitor 2 2 mfd 16vdc between KEYBOARD CO te re Whenmthe Power wined Git an ie Lew and High side of te Power on ali switch The fron the set the TV will turn back on again screen will have to be removed to accomplish this Sony KP53XBR45 RA1 Chassis Unit has line paring This condition is when the vertical scan rated changes an possibly reverse directions quickly then return to normal again KP53XBR45 KP53XBR45 KP53S25 had tech freeze the jungle chip which stopped the symptom Heating the chip aggrava
43. OM CURE asked tech to check the negative supply voltage to IC 103 l Memory IC on 10 it should be 29 VDC before replacing the KV2084 P3 Sey eel VADA nes Enanz E anys Nanne CPU and Memory IC CPU was not needed Verified the CONTROL Tech ordered the CPU and Memory IC i presence of the supply voltages at the memory chip The memory chip was defective KP46XBR25 E CONVERGENCE Unit has an intermittent Out of convergence Tech needs to a the Q603 Q614 R604 D605 both picture But now the unit is completely dead convergence IC s D605 is shorted KP53XBR45 serial 9012904 Unit Has an arcing Bulletin 281R1 need to be preformed on this chassis It will KP53XBR45 arcing Red and green CRT then shuts down Tapping on protect the GRT arier board iram are aver damage as a the neck of the tube aggravates the symptom result of an arcing CRT It is suggested to replace both CRT s and perform upgrade on all 3 CRT driver boards Sony KP61XBR48 Distorted audio only when using Call tech back regarding the IC or circuit involved with this KP61XBR48 RA1 AUDIO the Surround mode or any high end audio feature e panded audio teannen Cnitin AUA S ay ese 3 Ming The sound is a raspy approx 100 150 Hz buzz IC305 8 759 341 23 all located in the AA board complete i board is A 1297 622 A Tech is not getting B to any of the Audio output IC s on the KP61XBR45 unit has no audio When an external K board Apparently the GB board is not providing the B KP
44. RD SYMPTOM CURE The problem is caused by D1409 on the A Board shorting Problem caused by an intermittent B regulator on the G board IC651 1 809 524 11 Replacement resolves problem Unit will not turn on No high voltage Measuring We have seen a number of these units lately with D1409 HVJEAERIB EN Deag the condition D1409 is shorted shorted Often it is simply ring cracks on IC651 causing the problem This unit did have a loose solder connection on 1C651 1 but it did not drop the voltage down enough across D1409 The voltage was always 36 6 volts across a 36 volt R623 and VDR 602 burned up Tech needs 8 2 ohm resistor We to replace Tech does not have 8 2 ohm in his stock KV32XBR96 FN DEAD SEB RUG Unte dead and haa no v rmical However he can make an 8 2 ohm by paralleling a 10 and 47 EER ohm resistor This will create a 8 24 ohm resistor C531 vented is Connected to R881 KV32XBR36 Unit will not power on Monitoring the KV32XBR36 FN dead 17 vdc stand by supply we find the voltage One of the primary filtara onthe 17 yde standby supply CEB2 a 220mfd 35vdc was open running at 4 6 volts had tech look at Q501 E the voltage should be about 16 HORIZONTAL volts This is the pin modulator input for pincushion Busesengs FN SWEEP ee eRe dee neines AN ETAMAN ies PEIE correction In this TV it was 2 ae A hick ee check finds the ohm value to be under 10 ohms Tech needs to check The problem is caused by D1409 on the A Board shor
45. RE Tapping on neck of blue CRT gives flashes of heave blue KP53S35 a taps ene ca ese AE Mee Die horizontal lines then returns to normal B amp W Tracking Unit Bes will need a Blue CRT 8 733 497 05 KP53V85 Unit has bright screen with retrace lines KP53V85 CRT socket CR board has a hole burned through Tech has no 200 vdc source from the G board The 1 ohm BRIGHT RASTER it Previous tech out simply ordered All three CRT resistor is open from the D520 200 vdc rectifier to the CR driver boards and the 3 CRT s because of a burn in board the center of the tube KP53V65 KP61V45 Unit has CRT Burn caused by a DVD player or a CATV marquee that was allow to stay on the screen for an extended period of time This apparently is caused when the DVD player has a disk in it and not playing the disk a LOGO of the disk movie will appear on the screen Ona conventional direct view television this is not a problem if the display is left on the screen for several hours But this is not KP53V65 Unit has purple and cyan shadows on true with projection televisions Sever damage will result if a RA2 colored shadows the screen These shadows are very pronounced _ stationary image if left on the screen for prolonged period of when an all white pattern is shown on the screen time This is especially true with Sony when it is in the external Video input mode and the DVD VCR is OFF All Sony s will say VIDEO printed on the screen In 1 to 2 hours the tubes
46. TSS Logs for Sony Television Products pg MODEL KEYWORD SYMPTOM CURE KV32XBR45 AA 1 CONVERGENCE KV32XBR45 convergence is way off in the horizontal direction KV32XBR45 KV32XBR45 KV32XBR45 Unit has convergence of all vertical lines are displace horizontally Tech replaced the CAERA ENGE CRT without authorization This did not solve the symptom KV32XBR45 Unit has sever Horizontal static t convergence error TV cae to us from another AA CONVERGENCE shop where the CRT and flyback was replaced Customer call us for secont opinion Unit has an open R789 a 18 meg 1 2 watt resistor for the Horizontal static convergence The tech will have to make a resistor out of 3 6 2 meg resistors Suggest tech look for R789 and see if itis open Itis on the on C board It The value is around 10 meg There are two different chassis and CRTs used for this model If they have the older chassis type that requires H stat convergence CRT board has H stat control they need to order the older CRT as per the manual If newer type No H stat then the new CRT as per Service Manual supplement 1 is needed CRT 8 733 743 05 The H Stat is done using the Yoke ring magnets have attached the two Service Manual supplements and the SB325R1 Suggest tech look for R789 and see if itis open It is on the on C board It The value is around 10 meg There are two different chassis and CRTs used for this model If they have the older chassis type that requires H stat
47. Taah needa yoke Gave tech bulletin 387R2 relating to the shoulder roll off op modification for the yoke upgrade KV27S25 AA 2 HIGH VOLTAGE Unit has no high voltage LED in front is flashing on and off after power up Unit has a insufficient horizontal sweep The KV35V36 AA 2 horizontal sweep is reduced by 10 to 15 on the left side and 2 5 on the right Unit has a severe over scan condition for KV36FV1 AA 2 horizontal horizontal sweep Tech did not measure any voltages in the pin amp circuit Unit has severe over scan of horizontal sweep KV32S40 AA 2 horizontal Tech replaced Q512 Shorted and Q511 open all elements Tech needs to break the bonding of the yoke ant reposition the yoke There does not seem to be any horizontal drive to the Horizontal drive transistor Defeating the Horizontal output by removing the collector connection still will not allow Horizontal drive to appear at 1C351 37 This pin is sitting at nearly 8 5 volts not the 3 volts it is supposed to be Also 1C351 38 the HOFF AFCPIN is at 3 3 volts which is normal Unit has a bad 1C351 CXA2025AS When going into the tech set up parameters and adjusting the HSIZ value the sweep will change to full sweep Monitoring the voltage at the Collector of Q512 the voltage will vary from 27 volts HSIZ set to 22 When HSIZ is set to 48 Q512 C will drop to 16 volts The set will have full sweep but it has a slight foldover condition on the right side of picture It is reco
48. Unit hada loud pop and then the set lost top and bottom convergence It stayed that way for twp days according to the customer then it popped again and the problem disappeared and the set returned to normal but it lost sound 1 day later the sound returned and for the past 6 days the set is playing OK had tech check the data pulses from the Microprocessor to the DAC chips One of the Data chips was only 3 volts peak to peak Not the 5 volts necessary to communicate to the DAC Problem was a leaky zener diode D803 suggest that the red sub deflection yoke plug be removed This action eliminates the influence the convergence correction circuitry has over the Red CRT Once this was done the TV was turned on again and the cross hatch was placed on the screen One of the intersection points of the Red cross hairs was marked with a post it note The TV was allowed to run for 15 minutes After 15 minutes the red cross hair mover 1 4 inch down the screen This indicated the CRT was defective The only deflection the RED tube had was the deflection that feed all the tubes If vertical center were to drift it would drift on all the CRT not just the RED CRT Tech needs to check the protect diodes at the input of the G board D809 D810 D807 D808 These diodes are the upgrade listed in the latest revision of TVB380 Tech need to check the CRT sockets for the presence of the safety diodes in the on the cathodes of the power supply KP41T65 KP4
49. WORD SYMPTOM KV32S40 serial 8001469 Unit had the power supply IC601 shorted and open R607 Tech replaced these components and it shorted out again at the instant the television is plugged in KV32S40 Unit will run for several days then it will short the horizontal output transistor and destroy the power supply IC601 KV32V40 Unit was originally dead Q502 was replaced Now set has a sever over scan of horizontal sweep Collector of Q512 only 2 volts Q512 was shorted L511 is burned and needs to be changed along with D504 D503 D502 C511 C513 and L511 never recommend that after replacing these components in the power supply that the set have full line voltage applied to it The odds are very high the new components will be instantly Suggested the tech use a variac to do these tests This power supply should start running at 10 vac as a line source The current should never go above 100 ma during a no load test Max 800 ma during a normal load When running this power supply at 15 volts the current was surging to over 200 MA Checking al the loads on the secondary found no obvious short circuits However when checking the capacitors in the primary we found C610 has internal resistance of 470K There should be no internal resistance Replaced C610 and restored normal operation Suggest that C609 C610 C611 and C612 be automatically replaced This product was brought into the shop where the set was operated with the CRT disconnecte
50. YMPTOM KV24FV10 unit will not turn on No High voltage LED in front blinks 4 times indicating there is a vertical deflection has stopped Both relays will latch but RY600 will unlatch after 15 seconds Sony KV27S40 serial 8070786 No raster Has OSD and Sound Timer LED not flashing Tracing the video signal found that it was getting to the comb filter but no chroma or luminance output KV27S42 Unit has a flashing picture on channel 2 The raster will increase to a point where the raster will disappear with the Front panel LED flashing 5 times indicating an AKB failure KV27V42 When playing the DVD player through the S video input the Letters DVD show on the screen RY600 is the degaussing relay The 15 second delay is normal Since the unit never develops high voltage it would be obvious to all that vertical deflection will not occur However the flashing of the LED 4 times is a bit misleading The turn on relay RY602 latches but we are not able to achieve secondary B Closer inspection discovers that we are not getting primary voltages either Jumping the relay RY602 achieves High voltage and all functions work normally Unit has a defective RY602 part 1 755 266 11 Pin 27 of the combfilter did not have and 3 58 MHz signal on it Looking in the Tech menu of the chassis found the parameter 51 fsc was set to 0 We set it to 1 and restored the chroma and luminance Tech need to enter the tech menu and reset the VSS paramete
51. a MODEL KEYWORD SYMPTOM KP46S25 serial 9025552 Blue CRT leaking on E KP46S25 board Also the red and green tubes are showing 5 KP46S25 signs of seal rupture around the tubes Ss op KP53XBR45 The blue tube has a rupture in the Expansion chamber Unit needs three CRT s and E board A 1343 248 A which is NLA Asking tech to go out and get the E board to clean it in shop environment RT RT KP46S25 Serial 9010029 Unit s blue CRT No board damaged by the leaking Unit has to have the blue leaking CRT replaced RT KP53825 serial 924413 Unit has leaking blue CRT OK to order the E bard and CRT RT eS eS ee eee Unit needs Blue CRT and attempt to clean the E board dropped over E board When checking IC901 1 amp 13 and IC903 13 we had no positive voltages that would cause a high voltage protect shut down At no time did we ever get high voltage or KP53XBR45 Serial 9015424 Unit had two CRT s Horizontal drive for the High voltage output Q801 However RA1 Red and Blue leaked on the original E board Q505 the horizontal driver for the horizontal output always had drive to it When the first technician replaced the prompting their replacement After changing the ae a ae original circuit board it was discovered that he did not CRT s and the E board it was discovered the set transfer the jumpers on CN804 There must be three had a symptom of immediate shut down i l jumpers on this connector otherwise th
52. ach load on the SDA pp line and found the PIP tuner was responsible for loading down the DATA line KV32TW67 serial 70040800 Remote does not function RMY102 remote is being used The menu displays when in the menu button on the remote i pressed WE ae abie i nig tliat each apa gi The remote has been changed without effecting the the menus selection which are the Video Timer ee symptom This appears to be a system control failure All ID Setup and closed caption choices But when we KV32TW67 remote codes are within normal values Suggest the tech replace the selection of any of these are tried nothing happens following components IC101 and IC 102 are 8 752 856 00 In the service mode Service menu the service i and 8 759 280 74 The components correct the symptom menus comes up with AFC as the first selection However the binary number 1000 displayed under the word Service keeps changing from 1000 to 1100 randomly Unt wilchut down eachiime the Aemote Unit has an intermittent short to ground on the IR12 volt line KV32XBR35 AA 1 shut down located at the output of IC202 3 4 located on the A board headphones circuit is turned on This short Was caused b id that circuit y a solder splace on that circui When HV comes up the signal at the Collector of the KV32V16 eee KV32V16 serial 7089163 Unit will not stay on horizontal output transistor is normal No shorts can be found Goes into shut down immediately after turn on in the
53. amp 15 volt lines All 4 electrolytics are reduced from 1000 mfd to 470 mfd 25vdc These are C656 C657 C815 amp C889 After replacement no more had tech check continuity on the AC line cord which would measure the resistance of the Stand by transformer Continuity was 570 ohms which is good Next the tech needs to measure the input of IC641 it must be 20 volts IT Was The output of IC641 was 0 This IC is a 3 legged linear regulator with a generic of 7812 It should have had a 12 The PIP and comb filter assembly are in the PT module CN5001 5 is the sub video input for the PIP signal However the CN5051 14 is the Luminance output is missing The U amp V signalsCN5051 16 amp 15 are present They are the Red and blue portions of the PIP signal Tech needs to replace the PT module part 1 665 394 12 When measuring the cathode driver pin on the CG socket with it connected to the tube we found 36 volts When disconnecting the socket the voltage rises to 177 vdc Unit has defective CRT A 1501 372 A KP53V85 KP41T65 KP46C65 i KP46S25 TSS Logs for Sony Television Products KEYWORD retrace RETRACE LINES screen SHUT DOWN SYMPTOM Unit has bright screen with retrace lines CRT socket CR board has a hole burned through it Previous tech out simply ordered All three CRT driver boards and the 3 CRT s because of a burn in the center of the tube KP41T65 serial 9531495 Unit has a brought screen wit
54. and the Flyback but when power was reapplied the set destroyed the power supply again Unit is dead After talking to customer they explained that they had a power surge caused by a car hitting a power pole Checking the Collector of the Horizontal output transistor the retrace period was running in excess of 20 microseconds not the traditional 11 5 microseconds Closer inspection found the deflection yoke leads inside the connector were loose and the crimp for the wire to the horizontal winding were not making contact to the terminal inside the connector Unit had a blown IC601 and R607 Tech had failed to check the condition of the Power supply output for the 135 vdc source It was discovered there was a 1 2 ohm short to ground caused by a shorted protect diode in the secondary of the power supply cannot stress enough the tech needs to check all loads on the secondary of the power supply for shorts and use a variac to start up all power supplies All parts changed earlier are destroyed and need to be replaced The set was completely dead VDR602 was noticeably burned up Cutting this device our of the circuit found that it was open However the device is connected in the circuit like a metal oxide varistor It should measure open since it is in parallel with the A C Line It was discovered that no other shorted components could be found in the primer of the power supply Main line fuse WAS NOT BLOWN Checking the raw AC voltage on the AC
55. ansistor has drive has 7 distinct pulses on the base that go above and below the cut off point of the transistor KV32V25 AA 2 No Highvoltage eee Nie Seiten a EONAR Unit has ma high These seven pulses are 1 microsecond in duration and are voltage grouped in clusters after where the horizontal drive pulses are supposed to be If allowed to operate for more than a minute the horizontal driver transistor Q502 will short C to E The product has a bad jungle 1C301 When monitoring the Horizontal output collector we found ee the 140 dropped slightly at turn on But the Horizontal driver Meee ae devlop high vatage yhen Q501 C dropped to 85 and back up to 140 had the tech to the set is turned on no high voltage appears The ea remove the horizontal output transistor and try starting up the set has sound and has a flashing light on the front KV32S25 AA 2 No Highvoltage Gar set again After power up measure the Q501 C horizontal indicating the set is still in a stand by mode driver transistor It should be about 85 volts and stayed This waiting for IK pulse feed back acknowledgement KV26V36 KV27S20 KV32S25 KV32S65 TSS Logs for Sony Television Products MODEL KEYWORD NO RASTER NO RASTER No raster SYMPTOM KV26V36 Unit has no raster Further checking we found the set had High voltage and vertical sweep Just no filaments KV27S20 Unit has no raster Tech had replaced CRT but the symptom was not corr
56. aps The following transistors are the IK buffers Q733 CG board Q764 CB board amp Q706 CR board They are hidden by a heat sink for the Video output transistor Tech needs to order the spark gaps for each CRT module and replace the defective IK buffer IK buffer number is 8 729 200 17 and the spark gap is 1 517 729 31 Locations for Spark TSS Logs for Sony Television Products MODEL Chassis KEYWORD SYMPTOM CURE KP53V80 serial 9001172 Unit will turn on anda KP53V80 RA3 shutdown picture will appear but it will periodically arc and Blue CRT defective Arcing in neck Visual arcing shut down Unit has all three CRT burned from running at the ee 9 This error code is an indication the GREEN SKEW is off store Unit was sold as a open box item with the f There are no electrical adjustments for green skew What tubes already burned Once all the tubes were need to be moved is the mechanical rotation of the deflection installed the tech could not set the Green Green ele The ato Gonvarannce ie an vo nite During the setup of the Green CRT the unit gave wii g y giving yoke has any tilt at all an Error 80 KP53XBR200 serial 9008681 Unit has a faint Unit needs KIT T 9986 0653 per bulletin CSV 1 402 Kit KP53XBR200 RA4 Lines vertical line in the picture lines in the picture Only consists of 9 resistors 4 capacitors a 22 inch wire shows up on tuner video connector a wire tie and instructions The LED is blinking 5 times This
57. as the raster appeared the voltage dropped to 89 volts This indicates the CRT s are in saturation During this test the 200 volt source was still is running nearly 200 vdc The IK lines are causing this problem Measuring the IK line at the CG KV53V80 After the set is turned on the raster wil I reo on the set Aftor the picture appeared the votage did OSD AeA AA OANT eee ny ee ae not change NOTE ona ae ee voltage hace be brightness is intense and lacks contrast The OSD i eae menu is also missing near Zero volts as long as there is 0 beam current Each cathode had a normal IK pulse of 38 volts The IK Buffers on each board are very hard to get to so another plan was develped to check these devices The following transistors KP53V80 KP53V80 the PIP color is normal the tech will probably need to change the A board The set is less than 30 days old and the A board can be replaced under warranty The set is covered under the SAYS program Unit had a defective A board KP46C70 KP53V80 KV53V80 KP53V80 TSS Logs for Sony Television Products MODEL KEYWORD raster RETRACE LINES rster SYMPTOM KP46C70 serial 9001847 Once the set is turned on the raster will appear as a bright screen with video but the brightness is intense There are no retrace lines The set does not have any On screen display sound OK KP53V80 After the set is turned on the raster will appear as a bright screen with video The brig
58. at a shutdown symptom Checking Jung all secondaries we found nothing shorted Replaced flyback which corrected trouble Kva2ses intermittently he set walla ch Thie 0 C0 be rauc uy ECAT uggest ihe ween disconnect the CRT socket an run the set with the tube process takes about 30 60 minutes The set can Bessa ca bak onnaa if aie owe DIE disconnected and see if the set shuts down with the CRT shut down g p disconnected With the tube disconnected the chassis ran 3 KV32S25 KV32S65 pressed twice Sometimes the set comes on in the Video 1 input mode when it was in the tuner mode before it shut down days without shutting down A CRT was substituted and the problem never showed up on the other CRT Replaced the CRT and it corrected the symptom TSS Logs for Sony Television Products MODEL KEYWORD SYMPTOM CURE KV35V36 serial 9024090 Unit has an intermittent Tech needs to order the CRT Since we are not able to shut down that only occurs after two or three days confirm any trouble with chassis The CRT is nearly out of When shut down occurs the LED in front is Warranty It is recommended that since we are unable to al ANE anukdawn Blinking and raster disappears but sound is OK determine any chassis fault the problem must be due to CRT When flexing heating or freezing the main circuit arc over Note after 4 weeks of normal operation the CRT board the problem can never be recreated seems to have corrected the symptom KV2
59. connector were loose and the crimp for the wire to the horizontal winding were not making contact to the terminal inside the connector Cleaning the terminal and prepping the connection was necessary because there was evidence they were burned by the voltage drop in the poor connection After running the television for over 1 hour with the CRT disconnected It was determined the power supply deflection and horizontal deflection were all working It was further decided to change the CRT needs to be replaced CRT fixed the unit The set was completely dead VDR602 was noticeably burned up Cutting this device our of the circuit found that it was open However the device is connected in the circuit like a metal oxide varistor It should measure open since it is in parallel with the A C Line It was discovered that no other shorted components could be found in the primer of the power supply Main line fuse WAS NOT BLOWN Checking the raw AC voltage on the AC Line filters T601 and T602 find that we have no AC voltage on the output of T602 but present on the input side Isolating the open coil and removing the defective VDR602 allows the set to turn on and operate correctly Tech will need to replace T602 and KV27V65 KV36FV1 TSS Logs for Sony Television Products MODEL KEYWORD m SYMPTOM Originally dead with shorted IC601 converter IC and horizontal output transistor shorted too Unit is Dead Tech replaced the IC601 and R607
60. cuits Horizontal drive pulse Replacing these jumpers restored CRT faceplates for phosphor burns If burned the CRT will also need replacement Q510 and Q509 shorted Unit turns on but goes into shut down after raster Meseunngina2v0 VDE ue ne fine ee noe pile KP61XBR45 _ RA hutdown ti mand the cet hasa bridht screenith has open R859 Unit will need modification listed in bulletin aaa oe eee Unitnow tad all hai CRT burned 291R1 and 281R1 Tech will need to correct the main problem then after corrected the CRT will have to be KP53V35 had tech measure the B at the 135 and the 135 VDC sources The 135 was not indicating any voltage There is a 18 ohm short to ground on the emitter of the horizontal output transistor I m having tech check into the Horizontal SHUTDOWN at T a a Ae at pin amp ante Norze MA oput eee E A aon ita a but shuts off i circuit occur when the set ha a picture it is very likely that CRT damage has occurred It is recommended the screen be removed or use what ever method available to check the TSS Logs for Sony Television Products MODEL KEYWORD SYMPTOM However the unit will still shut off right after high 1C1804 1 1C1803 1 1C1808 1 amp 1C1807 1 found that a voltage comes up short circuit to ground was indicating on the output of 1C1804 1 this is the 5 volt regulator checking through the board and lifting the bypass electrolytic capacitors on this line discovered a shorted C1832 a 330 mfd
61. d be replaced Note to can be heard even if the TV is placed in AUX tech is that he must copy down the EPROM values or the mode with no input the his is noticeable tech will need to re converge the set from scratch TSS Logs for Sony Television Products Ea MODEL KEYWORD SYMPTOM KP53V75 unit has no audio C404 has audio up to G NEEME a input of 1C404 2 amp 4 Unit has no audio Tech ordered the A board under the SAYS program Cannot get the KP53V75 AUDIO EEPROM reader to read the data from the EEPROM to transfer the convergence alignment data from the old board to the new board El KPsav4s KP53V75 Unit has black lines that appear across the picture Further talking to the customer reveals black lines that they were wondering why when they operated this television it caused interference on other televisions in the house KP53V75 3 Unit has no audio I1C404 has audio up to the input KP53V75 AUDIO of IC404 284 KP53S35 No audio While in the process of servicing the set AUDIO the unit lost Green and blue convergence CURE Measuring the IC404 7 amp 11 which are the outputs of the 1C404 finds 1 3 amp 32 vdc respectively Each of these outputs must be exactly 50 of the B of IC404 9 which was 32 volts Unit has defective IC404 TA8216 part 8 759 246 70 Suggest the tech check the PS401 fuse It was open Suggest tech to change the fuse and audio output IC IC401 instead of replacing the A board Uni
62. d for approximately 100 hours continuously It ran fine But 6 hours after the CRT was connected the Horizontal output and power supply self destructed again Unit has defective CRT Suggest the tech replace the CRT After replacement of the components the sweep was still excessive When using an oscilloscope on the IC351 31 the E W pin out we found 6 volts DC and no 60 HZ parabolic wave form If this E W output pint was touched to ground through a 270 ohm resistor the picture narrowed up to a an almost normal width Product had defective IC351 MODEL KV32XBR48 KV35S26 KV36FV1 Chassis AA 2 AA 2 TSS Logs for Sony Television Products KEYWORD SYMPTOM KV32XBR48 Originally dead with shorted IC601 converter IC and horizontal output transistor shorted too The horizontal drive looked odd but this was not the problem KV35S36 serial 9027801 Unit goes dead after 10 minutes after the power supply was repaired Q601 amp Q602 were not running hot they just shorted They were replace 4 times Each time the transistors lasted 10 minutes and in 1 case 1 week KV36FV1 serial 9029271 Unit is dead After talking to customer they explained that they had a power surge caused by a car hitting a power pole Checking the Collector of the Horizontal output transistor the retrace period was running in excess of 20 microseconds not the traditional 11 5 microseconds Closed inspection was found the deflection yoke leads inside the
63. e exact same type of damage and so did the first replacement where it was replaced after a few weeks where it was changed again This second tech warned the customer not to use any liquid cleaner on the screen Now this screen has obvious liquid damage This is customer responsibility Tech forgot about a unusual symptom that if the set looses vertical sweep the television will cycle on and off as long as the antenna is connected But if the antenna is disconnected the set will shut down immediately This was the case for this unit 1C1501 was shorted Also PS602 was open MODEL KP41T35 KV36FV1 KP61V75 KP46S25 TSS Logs for Sony Television Products KEYWORD SHUTDOWN SHUTSDOWN 7 SYMPTOM KP41T35 Unit has blown PS601 and PS602 fuses The Tech replaced the convergence IC s and the fuses and powered up the unit again It blew the fuses again KV36FV1 Unit shuts off immediately after turn on Measuring the collector voltage Q502 C finds it rises up then falls to zero KP61V75 se 9009906 The symptom on this screen is a strange artifact in the video next to fine detail objects The artifact can be seen at times if a persons face is displayed and zoomed out to a distant image The lips will can still be seen but to the upper left of the lips there is a bright white artifact in the shape of the lips This can be seen on other images but this is the tech explanation of the symptom KP46S25 serial 9026954 Unit has no o
64. e CRT s Suggest the tech look at replacing the following components D1204 D1205 D1209 D1208 D1206 D1207 D1210 amp D1211 These are the limiting diodes and have a generic 1SS133T In addition there are 2 zener diodes in the secondary of this power supply that are used as protection They are D1213 and D1214 They will act like a crowbar across the or 18 volt source in the event the voltage increases beyond the avalanche limits of the zener diodes In addition to the components would suggest the tech replace 1C1201 It appears like a loss of chroma phase lock of the 3 58 internal oscillator The frequency is unstable Recommend tech resolder the connections on X301 C305 C310 and R322 in the AFCFL circuit of the Jungle IC This is IC301 near pins 1 2 and 3 Unit had broken connection on R322 The power on off switch is pushed the logic low that gets sent to the CPU is not staying low It get corrupted with a bounce caused by the contact in the Power on off switch This fix is to install a 2 2 mfd capacitor across the on off switch to de bounce the contacts The power on off switch is pushed the logic low that gets sent to the CPU is not staying low It get corrupted with a bounce caused by the contact in the Power on off switch This fix is to install a 2 2 mfd capacitor across the on off switch to de bounce the ON OFF switch Unit will need replacement Red and green CRT s TSS Logs for Sony Television Products E
65. e e CRT Removing ihe module mom ihe CRT the voltage raises the voltage to 189 vdc at KB CRT Unit will need a replacement CRT When the set shuts down All Cathodes of the CRT are only KV32S26 Unit will go to as bright screen with 66 volts With the CRT disconnected from the module the Rvees26 Aire RETRAGE DINE retrace lines then shut down RK BK amp GK will increase to 202 vdc Unit will need a replacement CRT Unit has the 200 vdc cathode source voltage measures 179 A vdc but when measuring on the cathode directly the voltage KV32S26 AA 2 retrace lines KV32S26 Unit has bright screen with retrace lines is very low 22 vde Disconnecting the socket causes the voltage to rise back to 198 vdc Unit has a defective CRT Measuring the 200 volt B at the CRT socket we found the voltage to be under 126 vdc This indicated the 200 volt KV32V25 AA 2 retrace lines Reeve aerial TOVADA Ua NAS Gig hh sereen source was not running had the tech check R553 a 47 ohm with retrace lines then shuts down i i 1 2 watt resistor and it was open Replaced the resistor and the set operated normall 7 had tech measure the 200vdc supply line and it measured EI KV27S25 nae ss ag BRO R Se rearrwet fetioes ANEM ual only 78 volts Unit had defective capacitor in the 200 vdc source TSS Logs for Sony Television Products MODEL KEYWORD SYMPTOM CURE KV27V40 araca lines Sony KV27V20 has retrace lines no video Unit will Missing 200 vo
66. e set will never get high voltage CN804 1 amp 2 CN804 3 amp 4 CN804 5 amp 6 Unit needs these three jumpers to route the 2 ABL circuits Horizontal drive pulse Replacing these jumpers restored KP53XBR45 KP53XBR45 KP53XBR45 serial 9032096 Unit has burned CRT s again CRT were replaced in October of 1998 because of a bar burned across the face plate Now the same bar is burned across the face plates of green and blue CRT s This is caused by the stock market channel and or CNBC banner at the bottom of the screen This customer was warned last year this would be a 1 time replacement for this symptom They were warned that continuous display of a stationary image will burn any CRT especially a projection television TSS Logs for Sony Television Products MODEL Chassis KEYWORD SYMPTOM Unit has leaking CRT Unit has convergence Both KP46S15 RA1 CRT red and green CRT are leaking coolant Damage is Unit will need replacement red and green CRT s localized to just the CRT s KP46S25 _ serial 9021406 all 3 CRT s Pen KP46S25 RAY ar leaked damaged to Unit needs Blue CRT and attempt to clean the E board if E BOARD possible Board will need to be replaced Hole is approximately 1 inch KP41T15 serial 9012082 Unit has a burned hole in square hole under IC 1601 around the current limiting the D around R1625 R1627 R1629 amp R1621 resistors Board number is A 1346 296 A and is no longer available from Sony World parts cent
67. ecks in the television discover the filaments KV32XBR51 ANU1 intermittent raster KV32XBR51 Unit has intermittent symptom of no become elaine More visual inspection reveals D raster Has sound and high voltage many small ring fractures around the heater pins of the flyback transformer Product has a defective MTS audio controller part 8 741 KV32XBR10 ANU1 no audio KV32XBR10 Unit has no audio 592 2 8 741 100 56 original number SBX1592 02 corrected the symptom P Sony KV32XBR50 No high voltage Has sound 7i a A e 7 OK on ee Driver KV32XBR50 ANU1 No Highvoltage Tech claims all B s are normal from power supply a A AA a eenneatian oosa gn however no high voltage primary connection of driver transformer Resoldered and restored normal operation REMOVE THE FOLLOWING PARTS ON THE C BOARD Unit has intermittent raster Bringing up the G2 bes ee ee E TT es KV27HSR10 RASTER voltage stops the aem action of the CRT ELECTROLYTIC 22NF 25V R755 RESISTOR 5MM JUMPER 330 OHM CONFIRM AND READJUST THE G2 ANU1 FOR CORRECT WHITE BALANCE Apparently nothing else is damaged with this chassis i l However if the horizontal output is shorted after several KP41EXR96 ANU 1 dead Sony AU chassin Umt nas detscive honzontal hours of operation Unit has defective horizontal driver output transistor transformer and driver transistor Leads on driver transformer show signs of oxidation TSS Logs for Sony Television Products EW MODEL
68. ect part number is the A 1501 372 A There are no subs for this tube at this time According to Sony World Parts center they have them in stock and can be shipped anytime The correct part number is the A 1501 373 A According to Sony World Parts center they have them in stock and can be shipped anytime Called Sony World Parts center and obtained the correct part number for the tube Currently there is no way to find out what tube is in the set by simply looking up the number in the manual The generic number must be compared to a new list the Sony Part has We were lucky to find the part number on the original CRT of A 1501 367 A Tech will need Replacement CRTO7MAC02B OK for CRT replacement TSS Logs for Sony Television Products RJ MODEL KEYWORD SYMPTOM CURE Unit will need the Red CRT This should be an ICB to the store since this was damage caused by leaving a DVD player connect to the set with the Bugs Life CD in side When not KP53S35 RA2 CRT alka het Pile 6 EGGO of Bugs MeBurmed playing and in the standby mode the logo will appear Since into the red CRT the logo never moves and over a prolonged period of time the CRT s can be permanently damaged with an image burn in the phosphor Unit has no output from the blue CRT Swapping ane Ey KP46S25 the green to the blue socket does not transfer the ees he Ee Eta ve lage TONNA E BE voeon trouble After replacement voltage checks indicated the E2 and B2 SONY KP53S35 R
69. ected Power light still flashing indicating the unit is in the stand by mode KV32S25 Has no Raster When the G2 is had tech check the must haves The only thing that was not present was Heater voltage had the tech remove the socket and measure the total resistance of the filament source by measuring the H1 amp H2 terminal pins on the C board It was open H1 amp H2 at the flyback were less than 1 ohm Checking CN503 found the black wire was loose and fell out of the connector when unplugged from the main board Connector wire would stay in place if reseated Pushing connector back in place corrected the trouble Open trace on the CRT driver board causing the IK pulses not to be returned to CN1761 6 not to be fed back into the jungle chip increased the set has a partial raster but brighter at The symptom indicates the set has a vertical deflection the top of the screen then the bottom Measuring across the vertical yoke windings we find there is a voltage of approximately 8 volts These is sound and channels can be selected KV32S65 serial 8014809 Unit has no Raster Sound O K LED on front panel flashing It also does have high voltage failure but more precisely a power supply failure for the _15 volts source The tech either has a open R536 47 ohm or open D530 had tech measure the G2 voltage at the CRT It was only 54 volts With the socket disconnected the G2 voltage returns to 410 volts Unit has defect
70. ency it locka 9 will not phase lock with the 3 579545 MHZ in the television H This is a software problem with the Satalite receiver A software download will be available to all receivers in Late KV35S26 TSS Logs for Sony Television Products a MODEL KEYWORD SYMPTOM CURE The customer is using two different RF sources Cable TV and a satellite dish The CATV is being feed into the RF input KV36XBR200 When the customer is using the RF labeled VHF UHF and the satellite is fed into the AUX input input labeled VHF UHF the set will picture will lose It appears the tuner does not correct the AFT when two KV35XBR20 AA 2 CHROMA chroma intermittently But when using the AUX different RF sources are used The channel will has to be O 0 input the chroma is solid and does not vary The _ readdressed again for any AFT correction to occur Suggest tech replaced the RF switch without effecting the the customer used the satellite in the S video and separate symptom video input mode In his present configuration the customer is loosing all stereo reception and all high frequency detail over This corrected the symptom Unit is connected in to component video input When operating a different DVD player the symptom is the KV35XBR48 AA 2 CHROMA mode through a DVD player The picture has a same There is no cure to this phenomin from Sony at this predominately green picture time KV27S820 serial 7042141 Unit will not operate in Tech needs to order IC00
71. er All power supplies are normal in operation Unit has Horizontal sweep when checking the Q505 C we have over 900 v peak to peak We do not have High voltage or high KP41T15 Unit is Dead Was hit by a power surge _ voltage drive to Q801 B or Q810 B find no horizontal drive KP41T15 RA1 D655 was defective Unit still will not power up Checking the HV protection circuit finds the IC902 1 is after the device was replaced sitting at 6 2 volts This is because IC902 7 is higher than IC902 6 This is attached to the OCP circuit It is conceivable the flyback is shorted on this due to the fact the 135 vdc OCP line is being triggered Unit did havea KP41T15 RA1 J ee has coolant leak which destroyed Unit will need a replacement E board ee a iss Tat ea dies The E board is heavily corroded and cannot be sufficient KP41T25 RA1 tubes are leaking Unit has been leaking for quite a y y KP41T15 RA1 while cleaned E module and all 3 CRT s must be replaced Further checking has discovered the E board has a large KP41T25 RA1 DEAD KP41T25 serial 9006330 Unit is dead hole burned through the board caused by a coolant leak from one of the CRT KP46S15 serial 9013723 DEAD Unit has leaking CRT s Both red and blue CRT s are noticeably Unit will need replacement CRT and the convergence output leaking with the green showing signs of moisture IC s around the expansion chamber KP46S15 RA1 TSS Logs for Sony Television Products MODEL Cha
72. ered the picture blinks on an off was assumed the IK pulses were OK from the jungle chip Tech replaced the flyback and jungle chip with no The main concern is if the pulses are leaving the main board changes in symptom and if the pulses are getting back to pin 27 This flashing condition indicates the IK feedback pulses are insufficient some where in this path Further static check indicated a shorted zener diode D1792 in the IK buffer path on the CRT KV27V25 Unit has intermittent snow in the picture zThe tuner pn 8 598 340 20 was replaced Now I instructed the tech to enter the tech mode and set the ID the set has a symptom where the remote control codes D0 25 ID1 23 ID2 47 ID3 0 ID4 27 1D5 135 KV27V22 intermittent snow CaUSeS the set to enter the video input mode when ID6 1 ID7 0 Write these in memory then press 8 Enter the channel is selected Also the set will enter the to initialize This corrected the problem video input mode if the and another brand of remote that operates a stereo receiver will put the set into the video input mode ID codes are 0 25 1 55 2 47 3 0 4 155 5 143 6 6 KV36FV75 No AUDIO KVS6FV75 Unit has no audio But also hasno 7_ which is correct Initializing the EEPOM did not correct OSD stating Main or Stereo Main picture is fine the trouble Tech will be returning with a Manual Scoping the first place where the chroma signal can be KV27S15 Unit has no Chroma Black amp
73. et We also performed an A C leakage test on the chassis and found that KV32V25 serial 7036251 Unit has an arcing inside Tech noticed the 15 volt source was lower than expected It the flyback transformer Tech replaced the was only 10 volts It is not unusual The voltage is normally AA 2 arcing transformer now the unit has a bright band at the 12 volts What the tech was missing is the 15 This voltage top of the screen The tech replaced the jungle IC must be there in order for the set to have any vertical sweep it was less than 015 volts measured at the customers ground connection and neutral was out a few days ago he plugged in the set in to wall and when the prongs made contact with the AC leakage claim AC wall outlet a small spark was seen The CATV rep exclaimed The television is a fire hazard and you need to call for service He left the set unplugged and we went out on this day routed to following the audio signal lines from 1C1401 audio Our tech plugged in the set and found the set did have a KV32V25 without effecting the symptom D530 was shorted and open R536 the 0 47 ohm current KV32V26 oe serial 8019814 Arcing in the neck off I Taah will need replacement CRT A80JYV51X spark as soon as the set was plugged in the AC outlet This 2 Z Kv35v76 ARCING KV35V75 CRT is arcing in the neck The CRT is bad KV27V10 serial 7104657 When the CATV rep is perfectly normal because this chassis has to fully charge 2 KV35XBR48 A
74. ge channels on the pee ice Peo ies Sl si siege kor co es ee ee CATV box in order to find the host channel In order for this ee g to operate the customer must use the IR Blaster If not they will need to split the cable before it gets to the CATV box and The IR blaster is used to communicate from the television to the CATV box in order for downloading to occur If the IR blaster is not used the feature will remain inoperable because a oan akan T r pue ale ise when the set downloads the data it must find the host function When the television is setup for TV guide KV35V68 AA 2 TV Guide PI Plus th omer Ee celoeiine tha hes Reve G channel It uses the IR blaster to change channels on the eee ee g ya CATV box in order to find the host channel In order for this VCR and CATV box But they are not using the to operate the customer must use the IR Blaster If not they Calble Mouse or IR Blaster deselect any VCR or CATV box questions by answering NO to questions about them in the initial setup TSS Logs for Sony Television Products p MODEL KEYWORD SYMPTOM CURE When raising the G2 voltage it was discovered the CRT had a uniform brightness where the top of the screen was brighter This product has a strange glow toward the top of than the rest in the CRT Measuring across the vertical yoke KV32S20 AA 2 uneven brightness the tube Sort of an out of focus raster but only at windings we found a8 5 volts It should be 0 volts if the the t
75. gulators IC904 is a 3 legged regulator used for the 15 volts supply The original was a plastic one Tech KP4evis AP SHUTDOWN KP46V15 Unit has a shutdown symptom AATE EE eee ieee ee ground because the new device has a metal back where the original was all plastic The cure was to cut the trace on the CBA that connected IC 904 heatsink to cold ground The enabled the set to operate with this new regulator asked the tech to check the B at the G board connector G2 9 amp 1 Pin 9 should be 115 vdc and 1 should be 135 They were Next connect and oscilloscope to the collector of Q811 high voltage output and turn on the set There should be a pulse of 1000 volts peak to peak spaced at 63 KP53S55 serial 9101980 Unit shut down microseconds apart This signal was perfect then the set shut KP53S55 AP chine dawn immediately after the set is turned on Set does get down Next had the tech check the Collector of Q502 high voltage Tech replaced the flyback Horizontal output There was no Horizontal signal it should transformer which did not correct the symptom look exactly like the Horizontal output Since Q502 runs ona negative source voltage the DC supply goes to Q502 E it should be 109 vdc It was 0 volts Further checking it was discovered that Q508 was completely turned off Checking the components in the Horizontal output circuit found an open R515 an 18K resistor Replacing resistor restored Unit going into deflection s
76. h retrace lines KP46C65 This screen has been replaced 3 times Customer claims screen has a crack in the screen This crack is in the same place as the last two times in the same set KP46S25 serial 9000075 unit is shutting down The stand by voltage is stable during the stand by mode Before working on the television it would cycle on and off It had a bright glow at the top of the screen Now after the second tech worked on the unit the set shuts down immediately after turn on Tech has no 200 vdc source from the G board The 1 ohm resistor is open from the D520 200 vdc rectifier to the CR board When measuring the cathode driver pin on the CG socket with it connected to the tube we found 36 volts When disconnecting the socket the voltage rises to 177 vdc Unit has defective CRT A 1501 372 A There is no crack but evidence that a liquid was smeared down the front lenticular screen which left 5 vertical bands of varying widths from 3 mm to 7 mm The liquid pooled at the bottom of the screen and it migrated by capillary action behind the front screen to the rear screen Fresnel The fluid followed the contour of the circular cut screen This is the reason for the dark lines that appear in a U shape at the bottom of screen This is clearly fluid damage and not covered by any warranty Customer does admit to using a Diskwasher rear projection screen cleaner in a red spray bottle According to the customer the original screen had th
77. has color temperature error in According to Sony tech support there is no adjustment for ileal ee the YUV input mode only this input Refer this customer to Sony customer affairs KV27S822 serial 8102548 Unit goes to a bright Unit has a defective CRT When unit is able to turn back on RYE ese BRIGHT RASTER blue screen with retrace lines then shuts down again the set will sometimes be in the video input mode Suggest the tech look very close to the connection s to 1IC351 4 This the Chroma AFDC filter Components R354 C355 C355 are in the AFCFIL circuit It is possible the trouble is a Jungle IC but Before replacing it is recommended to check the aforementioned components first Note when checking the components it was found that C366 has glue touching each end of the device The glue effectively changed the value of the device Cleaning the glue and reinstalling the device corrected the problem KV35S36 Unit has random chroma phase shifting The tint will vary radically NTSC color bars are not stable Barber Polling effect of colors on bars chroma This symptom acts like it is a problem with the satellite KV35 26 Unit has the tint phase shift and color receiver Inside the satellite receiver there is a NTSC lock up problems only on the Hughs satellite encoder which injects the 3 579547 MHz color oscillator KV35S26 AA 2 CHROMA receiver VCR and over air canak have cand elon signal in the video If this oscillator is too far off frequ
78. he CRT had When turned on the raster has a dim glow with the a uniform brightness where the top of the screen was brighter KV32S20 AA 2 raster top brighter than the bottom The Timer LED in than the rest in the CRT It was also discovered the 15 was front flashes Unit has high voltage and sound missing Tech needs to look at D530 and R537 a 0 47 ohm resistor ee Tech noticed the 15 volt source was lower than expected It Unit had an arcing inside the flyback transformer The tech replaced the transformer now the unit has was only 10 volts It is not unusual The voltage is normally 12 volts What the tech missed is the 15 This voltage must KV32V25 AA 2 raster a bright band at the top of the screen The tech i be there in order for the set to have any vertical sweep replaced the jungle IC without affecting the symptom Resistor for the 15 volt source from the Flyback was open D530 and R537 a 0 47 ohm resistor KV27S22 AA 2 ee Unit goes to a bright blue screen with retrace lines Unit has a defective CRT When unit is able to turn back on a then shuts down again the set will sometimes be in the video input mode Unit has bright screen with retrace lines then it will shut down Measuring the G2 supply finds nearly KV32S22 AA 2 retrace 420 vdc but the CRT cathodes are running only 55 1 a aa a U a a i Unit will need a replacement CRT volts Disconnecting the CRT socket causes the cathode source voltage to rise over 180 volts Mea
79. he set has a symptom where the remote control codes D0 25 ID1 23 ID2 47 ID3 0 ID4 27 I1D5 135 SYSTEM causes the set to enter the video input mode when ID6 1 ID7 0 Write these in memory then press 8 Enter CONTROL the channel is selected Also the set will enter the to initialize This corrected the problem video input mode if the and another brand of remote that operates a stereo receiver will put the set into the video input mode Unit has intermittent snow in the picture 8 598 340 20 tuner was replaced Now the set has a symptom where the remote control causes the set system control to enter the video input mode when the channel is selected Also the set will enter the video input mode if another brand of remote that operates a stereo receiver is used KV27V22 KV27V25 instructed the tech to enter the tech mode and set the ID codes ID0 25 ID1 23 ID2 47 ID3 0 ID4 27 ID5 135 ID6 1 ID7 0 Write these in memory then press 8 Enter to initialize Checking Key in to the 1001 we found it to be sitting at 3 7 KV27F15 The set has a symptom of the keyboard volts without any keys pushed This is an analogue input to the CPU and must be at 5 volts with no keys pushed SYSTEM doing the wrong functions Cannot get into the tech A KV27FV15 AA 2 Keyboard had small board contamination on the channel CONTROL menu When the display button is pushed the set down switch Removing the channel down switch corrected
80. he television The hum is present when a Ground Loop This condition is caused by the CATV the volume on the TV is muted or set to minimum ground is a different potential than the rest of the equipment and the volume of the external is turned up 20 This may not be able to be corrected without an electrician The hum is quite noticeable at this level 2 When checking the customer electrical neutral and ground using the variable fixed outputs the set will not connections in the customer house wiring We can simply have left channel output solve the trouble by having the CATV company installing a ground breaker in series with the CATV feed 2 The no output to the left channel output is caused by a torn trace at the left output connector for the variable fixed outputs KP53V 45 Unit has red tube that is arcing be calling in for Red CRT Approval CRT is Arcing in the KP53V45 No audio While in the process of Unit has a defective PS401 fuse and IC403 in the output servicing the set the unit lost Green and blue have stage As for the convergence problem there is a loose lost convergence connection between the A board an the G KP53V75 Serial 9018895 After the set is on for I have never heard of this symptom but since the television only a brief period of time there will be a slight Hiss is under warranty and is covered in the S A Y S program that will come an go in the right channel audio It _ then It would be best that the A boar
81. he vertiical output IC But checking the Data and clock found that the pulses after the power is pressed the data and clock pulsed 3 time during a the 3 second period wait affter power button was pushed After the 3 seconds there was a were a series of pulses with a duration of only KV27S45 serial 8015302 Unit will turn on but will 120 microseconds wide remaining for 3 more seconds then gt NO HIGH have high voltage It will shut down with the LED in disappeared The pulses were 5 volt peak to peak and O KV27S45 VOLTAGE front flashing 5 times indicating there is no vertical looked OK Artificially was able to tickle 1C451 1 amp 7 with sweep Jumping RY602 I was able to keep the set my Fluke 77 meter in the diode check mode This tests the on and test the power supply and IC451 integrity ability of the IC to deflect the beam up or down to check the intergrity of IC451 was able to get the beam to move up and down with this test We had the same type of Data and clock going to all peripherials unplugged the P board and A4 A4 BA4 i MODEL KEYWORD SYMPTOM shorted vertical output IC541 shorted from the 13 volt to the started the set again The Data and Clock now changed dramatically Instead of a 120 Microsecond pulse train it increased to was 1000 microseconds Unit has defective P KV24FV10 KV27S40 KV27S42 KV27V42 TSS Logs for Sony Television Products KEYWORD NO HIGH VOLTAGE No Raster NO RASTER S
82. hoot on it the exceeds the previous step This problem is being caused by the 3D Combfilter or the PD board Tech needs to order the Unit will need the Blue CRT G2 voltage running at 33 vdc On Blue CRT TSS Logs for Sony Television Products MODEL KEYWORD SYMPTOM This phenomena is caused by one of the IK buffers on the CRT driver boards The condition should be treated by replacing All IK buffers and replacing the Spark Gaps The KV53V80 serial 915183 Unit has banding of bright following transistors are the IK buffers Q733 CG board KP53V80 banding areas across the screen that becomes larger as the Q764 CB board amp Q706 CR board They are hidden by a heat sink for the Video output transistor Tech needs to order the spark gaps for each CRT module and replace the defective IK buffer IK buffer number is 8 729 200 17 and the spark gap is 1 517 729 31 Locations for Spark KP53V80 Serial 9008991 Once the set is turned on the raster will appear as a bright screen with KP53V80 RA3 BRIGHT RASTER video but the brightness is intense There are no Q764 was defective retrace lines The set does not have any On screen display sound OK KP53V80 KP53V80 Serial 9012671 Once the set is turned on the raster will appear as a bright screen with video but the brightness is intense There are no Be eat oe retrace lines Tech replaced the A board which eu edS ba did not cure the symptom The set does not have any On screen display sound O
83. hould be about Unit has loose solder connection on At D624 Also the connections to KP53EX35 AP NO RASTER a Unit has no raster but has sound and ie Filament transformer were loose on the board Several i loose solder connections on T605 4 amp 6 were also in question suggested the tech resolder all dubious connections in the G board Unit has no filaments to any of the three CRT s Tech needs to look at the output of T607 This is the filament supply KPR53EX35 Unit has no raster but has audio and transformer Note the filament voltage rides 240 volt above PRESENS PETER high voltage cold ground Filament voltage can be read between connector G4 3 4 Product had loose solder connections AP around this transformer and R613 Previous tech did not put ant heatsink compound on the KP53V15 Unit has Q509 getting very hot after 15 Device Putting Heatsink compound on Q508 allowed the BESINI AR pineusnign to 20 minutes device to run 20 minutes but still gets slightly warmer than it should R518 a 18K resistor has increased in value KP46S55 ser 9100302 Unit has a Q502 and Q508 On the A board the area around C510 has hole burned KP46S55 AP PINCUSHION Shorted Pervious Tech was working on the flyback through the board This makes the board unrepairable Unit section will need the A board TSS Logs for Sony Television Products Ea MODEL KEYWORD SYMPTOM CURE Several technicians were out and the last technician installs the D board re
84. htness is intense and lacks contrast The OSD menu is also missing KV53V80 serial 9001186 After the set is turned on the raster will appear as a bright red screen with video KP53V80 After the set is turned on the raster will appear as a bright screen with video The brightness is intense and lacks contrast The OSD menu is also missing Q733 defective This phenomena is caused by one of the IK buffers on the CRT driver boards The condition should be treated by replacing All IK buffers and replacing the Spark Gaps The following transistors are the IK buffers Q733 CG board Q764 CB board amp Q706 CR board They are hidden by a heat sink for the Video output transistor Tech needs to order the spark gaps for each CRT module and replace the defective IK buffer IK buffer number is 8 729 200 17 and the spark gap is 1 517 729 31 Locations for Spark gaps are Pulling the red CRT socket and turning on the set we measured the Collector of Q706 The red IK buffer It should have been 0 but it was 9 volts Replaced Q7056 and did the factory upgrade on the all the CRT modules corrected the problem Tech replaced the spark gaps for each CRT module and replaced the defective IK buffer IK buffer number is 8 729 200 17 The spark gap Pn 1 517 729 31 with locations of SG702 SG732 SG762 This phenomena is caused by one of the IK buffers on the CRT driver boards The condition should be treated by replacing All IK buffers and replacing the Spark G
85. hut down Unit has no horizontal KP53EXR95 AP SHUTSDOWN Sony KPREXR95 Unit will click on but not say on Sweep Bad solder connection under Horizontal output transistor on N board KP46V15 serial 9009331 Unit has a high pitch It is unknown what compound is in the glues used to quiet eens Trom the high voltade Dower elinaly T ch down the transformer but would not use it any more Super KP46V15 AP Squeal q 9 ee PPIy glue or cyanoacyralate is probably the best compound to tried to glue the transformer with speaker cement ace Haas stop acoustical lamination vibration The tech will need to now the set does not run anymore replace the flyback transformer TSS Logs for Sony Television Products MODEL KEYWORD SYMPTOM Suggest tech listen to where the noise is coming from It was KP46S55 Unit making a mechanical squeal either determined that L501 was the source of the trouble Rather KP46S55 squeal in the power supply or deflection circuit The than ordering the coil suggested the coil be saturated in a symptom occurs when the unit is first turned on cyanoacryltic compound super glue to quite the loose coil laminations This is an illegal channel entry and is not a function of CATV our the UHF channel number Everything else works normally with the exception of this glitch My suggestion is to try to initialize the EPROM and see if the symptom clears up This action did not correct the symptom EEPROM replacement solved the problem
86. is about 1 2 H KP53XBR35 Forwarding this case to Sony This symptom is intermittent Recommend the Digital comb filter for this unit to be replaced Since the jungle IC was replaced to try and correct this symptom with The digital combfilter is the only thing that could cause the storage of several lines of video and insert it in the wrong spot if the digital counters in the combfilter malfunction Swapping the combfilter cured the KP53XBR35 After unit has been playing a while the picture will duplicate it self on the left side of screen Customer was able to take a photograph of the symptom ghosting Unit has a intermittent symptom of a horizontally Recommend the Digital comb filter for this unit to be doubled picture In other words if a 1 inch wide re replaced Since the jungle IC was replaced to try and correct vertical bar were to be displayed at the center of this symptom The digital combfilter is the only thing that the screen another inch wide red vertical bar could cause the storage of several lines of video and insert it would be seen about 4 inches from the left side of in the wrong spot if the digital counters in the combfilter the picture malfunction Sony AP chassis Unit has line paring at the vertical rate Appears like the scanning lines are _ This is a very good test to insure the trouble is in the line paring spreading apart in the middle of the screen These convergence correction Unit had defective Convergence di
87. is an indication of a IK error Since it is so intermittent suggested that he could replace the A CB CG amp CR boards These are covered by the S A Y S program It is possible that a tube is causing this trouble but we cannot confirm it unless we see the symptom The replacement of the boards is an attempt to eliminate 4 possibilities of the IK generating and sensing circuit This is the XDS extended data services information that is broadcast in the VBI It is selected of the customer has the XDS feature turned on We could not turn this unit off Suggest tech to enter the tech menu and initialize the EPROM by pressing 8 the Enter This corrected the symptom P61XBR200 RA4 KP61XBR200 No Raster but has sound Unit will operate for several days then loose raster During the episode the Timer Led will blink as it does during the warm up sequence KP61XBR20Q RA4 NO RASTER KP53XBR200 Unit will not loose the on screen KP53XBR200 display data that shows the program material length of time type or program rating etc TSS Logs for Sony Television Products MODEL KEYWORD SYMPTOM CURE KP61XBR200 Unit has a symptom Unit has an intermittent symptom of loosing raster every hour KP61XBR200 RA4 RASTER or so When the raster disappears the stand by replace CR CG CB and A boards under the SAYES LED in front blinks on and off In about 15 minutes or so the set will S KV20EXR20 HORIZONTAL KV20EXR20 Insufficient horiz
88. ive CRT CRT must be replaced A80JYV52X KV32V40 KV20VM20 jie KV32S22 KV32V25 AA 2 AA 2 AA 2 A 2 TSS Logs for Sony Television Products MODEL KEYWORD NO RASTER no raster no sound no video SYMPTOM KV32V40 Unit has no raster When G2 is increased the unit has a non uniform bright screen brighter at the top of the screen The television has sound Sony KV20VM20 Unit has no raster but sound and OSD are O K KV32 Unit has a horizontal line across center of the screen The line is elevated above center by 2 inches There is no sound too No LED S in front are blinking KV32V25 Unit has no video when using the front input jacks All other inputs are O K Cure Checking the 12 and 12 volts at 1IC561 2 amp 4 respectively are normal Monitoring Q561 C it was only 1 7 volts where it should be about 3 volts and Q561 B was 0 6 volts where it should be 0 volts The voltage at Q562 B is always low 0 11volts By pulling the base Q562 B high with a DMM in the diode check mode we are able to get full vertical sweep It appears there is no or poor pulse coupling between the FB pulse U561 3 and Q562 B A strong pulse is present at U561 3 when grounding Q561 B No pulse at C564 Tech needs to replace C564 1mfd 50 volts was Unit did not have any Horizontal blanker pulse to pin 19 of the Jungle IC Shorted Z1403 Unit had 60 Peak to Peak at the FP of flyback At cathode of Z1403 should be 7 volts
89. laims the menu Tech will need to check back in two days an see if the LED in front does not flash symptom shows up in Sony KV9PT50 serial Unit does not respond with the remote or Keyboard In fact when the keyboard KV9PT50 BN1 SYS CON is activated the Volume goes low and any other Shorted C009 on pin IC100 key causes the set to either turn off or change channels Unit will not get raster even if the G2 is raised all the way up We still don t get a bright screen with KV32XBR100 DA1 raster retrace lines Tech requesting the Feature Box R554 was open This will be a waste of time because the feature box is not necessary The 200 vdc line at the CRT is only running at 144 vdc on all V32XBR100 DA1 RETRACE LINES aa Pint nase Bright Sereen Min Notiace cathodes Unit has an open diode on flyback transformer for the 200 vdc source a KV27XBR10 Serial 7009564 Unit has AFT drifting Unit fleeces have the IF Demodulator module removed from it s shielded compartment and resolder all the KV27XBR10 FN AFT as soon as the channel is addressed It never stops __ adjustable tuning transformers The AFC coil transformer has the AFT search ring fractures around the pins that protrude through the Unit will not power on Monitoring the 17 vdc stand One of the primary filters on the 17 vdc standby supply C662 a KVJEAEMSG by supply we find the voltage running at 4 6 volts a 220mfd 35vdc was open TSS Logs for Sony Television Products MODEL KEYWO
90. lection is KP61S70 RAS CONVERGENCE convergence control for blue horizontal lines This PS1506 an it s open Itis a 2 amp device Part 1 533 593 mean the vertical sub deflection circuit is 11 malfunctioning KP61S70 serial 9005015 Unit is not developing ae KP61S70 RA3 HIGH VOLTAGE high voltage but has Sound No secondary Reo tan Inal nectar non ter ihe er bgardi Unable Tg provide part number voltages from Main power suppl TSS Logs for Sony Television Products MODEL KEYWORD SYMPTOM are the IK buffers Q733 CG board Q764 CB board amp Q706 CR board They are hidden by a heat sink for the Video output transistor Tech needs to order the spark gaps for each CRT module and replace the defective IK buffer Since the trouble does not affect the B amp W portion of the picture it was ruled out any failure with the IK circuitry Also the PIP was unaffected so we ruled out the PIP module or KP53V80 Unit will run fine for hours but color hues the Jungle IC The only logical answer was the 3D comb filter will changes and at times and the color will since the video is digitized and the resulted Chroma and pixelate pixelate Problem does not show up if the color is Luminance converted back to analog again This is about the turned all the way down The PIP is not effected jonly place where the chroma can become Pixilated However Monitor the cathodes of each CRT at the instant of turn on All cathodes were close to 186 volts But as soon
91. ll a i OT capacitor with a value of 33 mfd at 250 vdc in place on top of vertical lines in picture that are spaced 1 inch nap 2 chassis in positive side to FB503 and negative side to KV32S45 vertical lines _ apart on the left side of the screen It can be scene G ground This simply increases the capacitance on the 130 on all inputs Best seen on scenes around 10 20 i IRE volt line to the horizontal output section and reduce ripple caused by the hard demand of current when the flyback is switched on Part 1 107 654 11 This minimized the effect jose sound EPROM was changed too with no effect But the CPU IC001 connection Resoldering the connection returned the set to AA 2 AA 2 A 2 TSS Logs for Sony Television Products MODEL KEYWORD SYMPTOM Gaining a little more information from the tech found out the set actually had a No Raster condition and the timer led was flashing The G2 was increased tin order to get this KV32V20 Unit has poor contrast Tech has to washed out picture The probable cause of this problem is the IK pulses may be too low for the Jungle IC to correctly AA 2 VIDEO rae Nee ust ua a ey when none interpret them By raising the G2 voltage the IK pulses are a ss i washed out and lackingigoad raised up to a point where the Jungle will acknowledge them j But by then the RGB drive is too great and a overdrive condition occurs on the CRT Tech needs to check the components in the IK buffe
92. lt source from flyback to CRT driver board shut down if left on after the filaments warm up Trace broken at CN1781 After checking out the box and moving the box it was KV32840 Brightness shading in brighter on the discovered the movement of the box effected the screen Ay brightness The box was mounted directly beneath the right side than it is on the left side of the screen s KV32840 shading Symptom only shows up in the tuner mode VCR in television If the box was moved to the far left the symptom disappeared If centered below the TV the symptom was vigen input made Enne Urt has le Box evident Solution was to move the CATV box away from the Scientific Atlantic model 8580338 ae ra television and remove any electromagnetic interference caused by the television When monitoring the Horizontal output collector we found An i the 140 dropped slightly at turn on But the Horizontal driver oae a a Geyetep mah voltage When Q501 C dropped to 85 and back up to 140 had the tech to the set is turned on no high voltage appears The i E remove the horizontal output transistor and try starting up the set has sound and has a flashing light on the front AA 2 shut down P DE set again After power up measure the Q501 C horizontal indicating the set is still in a stand by mode ae driver transistor It should be about 85 volts and stayed This waiting for IK pulse feed back acknowledgement tom the nale ic told us we were looking
93. mmended the tech replace the retrace capacitors C511 amp C513 and the Yokes capacitors C518 amp Tech needs to check on L511 Q512 C513 C511 D502 amp D504 One or more of these are shorted Measuring the collector of Q512 tech finds the voltage running in excess of 7 volts The voltage on this transistor in inconsistent with the symptom on the screen of a narrow raster that is hourglass shaped L511 and Q512 are burning up Suggest the tech replace the following additional components D502 D503 D504 C511 and C513 N MODEL KV27S20 KV32S40 KV35V35 TSS Logs for Sony Television Products Chassis KEYWORD SYMPTOM CURE Sony KV27S20 Black banding across the screen Gave tech modification on the KV27S20 to replace C1267 AA 2 horizontal lines Symptom does not appear when playing a tape from a 047 to a 47 tantalum capacitor Measuring the collector of Q512 tech finds the voltage running in excess of 7 volts The voltage on this transistor in inconsistent with the symptom on the screen of a narrow raster that is hourglass shaped L511 and Q512 are burning up Suggest the tech replace the following additional components D502 D503 D504 C511 and C513 When going into the tech set up parameters and adjusting the HSIZ value the sweep will change to full sweep Monitoring the voltage at the Collector of Q512 the voltage HORIZONTAL KV35V36 Product has a insufficient horizontal will vary from 27 volts HSIZ set to
94. n the television tech replace the crystal and the two padding capacitors in the crystal network KV27V40 Unit has vertically skewed convergence Center vertical convergence is Skewed with red CONVERGENCE skewed counter clockwise by 0 5 inches and blue Problem is caused by a defective CRT skewed clockwise by nearly the 05 inched Green lines are straight KV27V66 a gt KV27V40 dp All TV s that use autoprogramming must have 2 inputs to the CPU that will tell the CPU it will store a channel in its memory These inputs are AFC crossover voltage amp presence of horizontal sync The AFC get the frequency of the video carrier centered in the passband of the IF The KV27S42 Serial 411756 Unit does not horizontal sync is used to validate the signal is a non autoprogram When using direct access to change scrambled video signal This television did not have the BA4 AUTOPROGRAM channels the set will execute channel change but Horizontal sync from IC010 an HSYNC SW This device is takes nearly 4 seconds before it will lock in used to detect valid horizontal sync from both tuners There channel the set will access it was composite video at 1C010 1 but there was no output on IC010 7 Neither one of the tuners had good channel lock in characteristics Suggest the tech check out IC010 IC 10 had a contaminate under the chip It was a light brown compound that covered all pins under the IC The contaminate was removed and the old
95. nected to this circuit the input capacitor for the right channel charged with this 4 5 volts We still had audio on this line even though it was at a 4 5 vdc potential But when the Sony muted the input capacitor inside the Big External amp discharged and caused a tremendous pop C172 is a 47mfd used to decoupling the audio from IC101 the Variable audio control IC This capacitor had 4 5 vdc on each leg measured to ground Removing the capacitor and measuring the DC resistance across the cap measured 175 ohms Replacement of the capacitor corrected the symptom Problem is best heard in the video input mode with no signal put to the input It can be seen with an oscilloscope on one of the output pins of 1C1401 but not on the input Part number is 8 759 369 39 1C1401 corrected the trouble All SAP Stereo and mono functions come from the Tuner assembly and nowhere else If a problem exists for the S A P feature all circuitry relating to the feature is replaced when the tuner assembly is replaced Recommend the Tuner IF MTS decoder assembly Replacement corrected the TSS Logs for Sony Television Products 2 MODEL KEYWORD SYMPTOM CURE Sony KV27V65 Sound does not ramp up correctly I had tech get into the ID codes and reset ID2 from 239 to KV27V65 AA 2 audio Seems to get very loud as soon as the volume 175 and ID 4 from 130 to 194 Then initialize the EPROM gets higher in a very short time Set returned to normal operation KV35XBR35 Unit
96. ness It would drop to 8 volts but never lower than that The Q571 B was at 135 1 and Q571 E was 135 The device is a PNP transistor With these voltages this transistor should be turned off 0 volts on the collector had the tech remove Q571 C and the set ran fine The collector then measured 135 vdc Transistor checked statically OK but suggested the tech replace it an Customer want to autoprogram all of these sources into antenna A and the other source into Antenna B This is not possible with this type of television TSS Logs for Sony Television Products jE neo foma kewworo smo fame KV27V42 serial 8028220 When this television is on Channela the rastar wilgo mt Changing ihe Tech needs to enter the tech menu and adjust the CDMD KV27V42 BA4 system control channel the raster returns Going back to channel E Fos Te parameter from 0 to 3 2 the raster disappears again LED in front flashes when the NO raster symptom is present Customer claims the set develops a symptom of a Taking a conservative approach to this repair the tech needs black vertical line in the center of the screen Itis to enter the tech menu and reset the VSS parameter from 0 spreads rapidly across the screen until there is no to 1 and the CDMD from 0 to 3 This will cause intermittent VEU YD ens VERTICABEINE raster Afterwards there is still sound but no On loss of raster There are no error codes listed in the Tech screen Display or Raster Customer c
97. ontal sweep IC603 On the G board all the B on the supply IC503 is defective N SWEEP is the wrong IC for this chassis SEC135
98. op 1 5 of the tube vertical output is working It was also discovered the 15 was missing Tech needs to look at D530 and R537 a 0 47 ohm resistor Unit had bad diode resistor and vertical output KV32922 AA 2 uneven brightness KV32S22 Unit was dead Has a glow at the top of Unit is missing the 15 volt source voltage to the vertical the screen only when the G2 voltage is increased output supposed to be 0 volts Also unit has no audio _ signal Removal of the PIP module restores the normal operation Unit has defective PIP module Tech is trying to cure the vertical sweep defect but the not the sound These are related to each other This set will not develop vertical sweep unless there is data communications between the microprocessor and Jungle IC Tech needs to KV32XBR48 this is a AA2C chassis The monitor the SDA amp SCL lines that are marked on this television has no vertical sweep and no sound chassis If there is a short on either line the set will loose elated a VERMGRE Tech replaced the vertical output IC without vertical sweep Clue is you need the SCL amp SDA lines to correcting the symptom control audio if a short is on these lines or data is corrupt the set will have no audio too There was no Data or clock on the UX board Checking the presence of 9 volts we found it to be only 7 volts Monitoring the protect diode D261 zener diode on the SDA line Unit had a defective D261 on the UX Both 2 and 4 of IC1501 are 12v
99. op of screen Area around Bulletin 387 did not mention a THL plate which needed to be the extreme edges of the fields do not have adjusted was in the old deflection yoke After following the straight lines Horizontal lines have a shoulder roll new bulletin 387R1 we were able converge the set Also the off Tech ordered Yoke specific to bulletin 387 new tube needed 3 magnetic on the bell of the tube to but received the complete CRT held off correct a purity error and converge the lower right hand replacing the CRT due to three of these have been corner changed so far with no changes in the symptom KV36XBR200 Unit has an intermittent arc over that will shut down the television When looking at a blue raster at 60 IRE the blue does not have uniform brightness across the screen The light output KV36XBR200 serial 9016329 On the far extreme _ is not the same level at the area of the screen where we see left and right side of the screen the picture has a__ the yellow with a 60 IRE white screen We are not able to yellow color temperature where it should be white adjust the Blue to make it equal in brightness in all areas of the screen This is a defective CRT Customer does not want the set requesting a replacement Under 30 da TSS Logs for Sony Television Products MODEL KEYWORD Unit has insufficient vertical sweep Also has top KV36XBR20 AA 2H vertical vertical foldover Tech can get into the menu and Tech needs to replace IC561 D561
100. peak to peak Replace diode and restored normal operation This symptom is inductive of a problem in the data or clock bus Measuring the SCL amp SDA found the SCL was running at 1 volt peak to peak and the SDA was at 4 97 volts PP had the tech start pulling all of the stand up boards out of the mother board to isolate the SDA amp SCL lines After the main tuner was removed the SCL returned to normal Replacing the main tuner corrected the trouble When tracing the video signal from the front input connector we find good video on the connector but less than an inch away from the connector is a coupling capacitor C2233 Apparently the trace was torn after the video input jack entered the board Placing a hard jumper wire from the Jack corrected the fault TSS Logs for Sony Television Products A MODEL KEYWORD SYMPTOM CURE Checking the video at the input of the comb filter IC3504 2 on the rear I O circuit board The video is perfect ae the Luminance out IC3504 9 is broken into pseudo square This television had sever noise resembling black amp waves that are random in size and shapes This indicated the white random lines of varying lengths No Combfilter was not working Further checking discovered the Pyanpmig Moser nied discernable picture Noise is in the tuner and video FSC 1C3504 37 which is a 3 58mhz carrier was reduced to and modes a 60hx pulses At CN271 15 we found the FSC signal normal Problem was an open trace
101. pusher the set will have a normal picture with sound But obviously it will not turn off KV27V42 Unit runs but will shut down intermittently with the timer LED flashing ina sequence of two flashes then a 4 second pause then two flashes Seem be sensitive to the effects of beam current Just prior to shut down the set will exhibit horizontal instability The main B from the power supply is stable KV27V40 serial 8015653 Unit is connected to antenna and two different satellite systems and want to auto program each satellite receiver in both A and B inputs The vertical out is shorted and burns out the 15 volt supply The resistor R561 is a 1 4 watt and R562 is a 1 2 watt These resistors typically are both the same wattage It is suggested to replace both with the same value 0 47 ohm While running in this condition discovered the base of Q610 was in saturation Floating the collector of Q610 allowed the set to run without the jumper on the relay On Off operation was normal Measuring the anode of D620 found it to be 4 5 volts where the cathode was at 7 5 This appears to be a 10 volt zener Replacing the diode D620 cured the trouble Suggest the tech try running the set with the CRT disconnected The set runs fine in this mode The horizontal output is running normal temperature Suggest the tech measure the collector of Q571 C It should be close to 4 to 5 volts with beam current It was 9 volts with a normal screen bright
102. r circuit on the C board D1792 3 9 volt zener diode amp Q1790 2SA1309A black and white tracking It is thought that a designed KV32V20 separate black and white tracking or RGB drive KV35XBR48 adjustment in the YUV mode will solve this trouble Since this set has the super flat CRT It incorporates a dynamic focus circuit In other words the focus voltage varies KV32FV1 Unit has poor focus on the left and right ae tha beam travala iram BHO right Measuring ha Sde oiscreen but OK m th conter Ithe locus Horizontal parabolic wave form up to the input of the primary KV32FV1 AA2H focus i i SR of the DF transformer we found the signal to be normal We control is varied through its range the sides will were unable to measure the voltages further because they become in focus with the center out of focus i were potentially focus voltage potential The horizontal parabolic wave form enters the Flyback at the secondary of the DF transformer Unit had defective flyback transformer KV35XBR48 serial 01901543 Customer using this television on a DVD player and has it connected through the YUV inputs The gray scale is According to Sony there isn t any drive adjustments in the favoring the green color temperature even if no YUV mode This symptom shows up on another Sony color is present on the screen Playing back the television of the same model Sony claims this is a normal WRONG COLOR ci i same signal in the Compo
103. r from 0 to 1 and the CDMD from 0 to 3 Channel 2 is broadcasting a signal in the VBI area of the video signal asked the tech to enter the tech menu and change the setting in the VSS parameter from 0 to 1 Also change CDMD from 0 to 3 This relates to the bulletin TV420 However this did not correct the symptom had the tech scrutinize the picture very closely and he discovered the image begins to have a slight sync stability prior to the event where the set displays the words DVD had the tech interrogate the composite video out of the DVD player and look for any anomalies in the composite video vertical blanking interval and horizontal sync This unit uses sync to determine if the input port is live with valid sync If sync is missing or corrupt the OSD will show the words that are defined by how the input label programmed This unit ma MODEL KV27V42 KV27S42 KV27V42 KV27V40 Chassis BA4 BA4 BA4 BA4 TSS Logs for Sony Television Products KEYWORD shut down shutdown SHUTSDOWN SYS CON SYMPTOM KV27V42 Unit had led in front flashing 4 times after turn on This indicates the unit has no vertical deflection KV27S42 Unit will turn on but will shut down after 1 second The LED in front flashes 5 times If you check the Error codes of 4 times which indicates the set has a vertical failure However when we jumper the relay RY602 AC contacts the set will come on and id power button is
104. ration The switches that acts as the volume up was swapped with the Menu key switch The volume switch began working correctly and the menu stopped The switch was replaced and now it works correctly Tech needs to look at the output of IC506 5 for the Red horizontal centering This IC is the Bus Decoder that decodes the data to 4 separate outputs Each output is for Red H amp V B H amp V Centering Since the Centering is fine for the B Horizontal and poor for red it is suggested too replace the IC New IC corrected the symptom Tracing the pulsating we find the Output of IC506 has a pulsing on it that is coincident to the pulsing on the screen Unit has a defective IC506 MODEL Bice es KP53V15 KP53V15 KP53S25 KV35S40 KP41EXR96 TSS Logs for Sony Television Products KEYWORD CO CO CO NVERGENCE NVERGENCE NVERGENCE SYMPTOM Suggest the tech check the possibly that a problem on the A board IC506 may be causing the trouble This IC controls both the horizontal and vertical centering of the red and blue CRT registrations The Horizontal correction voltages are simply a DC voltage that is fed to the V board The V board houses the IC s and drivers that will change the DC offset voltage that effects the Horizontal centering However these circuits were operating correctly It was determined that IC902 was running warmer than normal Unit had defective IC902 CXA1268P the Wave generator was defective
105. s voltage is about 180 volts too high This voltage did not vary even when the CRT was disconnected This indicated the 180 volts source at cathode of D512 180 v source was too high If CRT were disconnected the voltage is still too high Open bleeder asked tech to check to see if the upgrade listed in CSV 397 Jumper are present in the correct spots of the K board Tech can measure 9 6 volts buzz at speaker terminals However with the speakers disconnected the customer still claims to hear the 60 hz buzz It this is true the tech needs to look into the deflection yoke for a cure the buzzing By putting pressure on the yoke the tech can try to eliminate the vibration in the yoke assembly caused by loose Tech will need to go out with an variable audio tone generator to see where the source is of this mechanical vibration Once found the tech must apply a special tape to the mating surfaces of the cabinet parts that are vibrating as stated in bulletin 244R1 This bulletin does not actually apply to this model but the approach to the repair is the same Part of the tape necessary for this job is 7 632 661 51 TSS Logs for Sony Television Products MODEL KEYWORD SYMPTOM CURE TRI Tech needs to check the SDA And SCL lines to the tuner a re T aall When the set is on the Clock line at the tuner has a pulse but KV27V40 BA4 all snow hele image oei jacedthe A cat a the SDA is Low No data pulses Unit had a scratched trace ge p leading to the
106. sappear after the fuses are removed from the D output IC s board horizontal D KP53XBR35 i KP41EXR96 Measuring the B s at the A board connector A2 1 amp 9 we find 90 amp 115 respectively The 90 is wrong It should be Unit has no high voltage Tech replaced the High 135 vdc Measuring the collectors of the Drivers for the HV eos nF APEE E voltage block and the set still has no High voltage output Q806 we find the voltage at 122 This would indicate the Horizontal drive may be missing Tech needs to look at the H driver circuit for a no drive condition TSS Logs for Sony Television Products pa MODEL KEYWORD SYMPTOM CURE Measuring the B s at the A board connector A2 1 amp 9 we KP53S55 Serial 9003661 Unit has no high fins 90 amp 115 respectively The 90 is a wrong It should be 135 vdc Measuring the collectors of the Drivers for the HV KP53S55 AP no High voltage voltage Tech replaced the High voltage block and ok the set still has no High voltage output Q806 we find the voltage at 122 This would indicate i the Horizontal drive may be missing Tech needs to look at the H driver circuit for a no drive condition Sony KPR46EX25 Unit has no raster Filaments do _ KPR46EX25 AP NO Raster not warm up No pulses to the filament pulses to wi NaN ee i filaments CRT but filaments are 200 volts above ground Unit has no filament voltages Tech needs to measure the filament source at G4 3 amp 4 This s
107. set has high voltage with horizontal and KP53V75 RAD intermittent no junit will run for days then it will go to no raster and vertical deflection Tracing the SDA amp CLK signals finds the raster no sound with Stereo Led flashing CLK is running 3 5 volts pp and the SDA runs at 5 1 volts pp While the tech was working on TV the picture came back on again and the CLK line climbed to 3 9 volts pp It never climbed to 5 1 v pp like the SDA line Tech isolated all the plug in boards to try to get the CLK to rise to 5 1 Only when the TU101 was disconnected the CLK Line went to 5 1 volts pion wee sepa dels On ES aatan Wen Removing the screen finds the main reflector mirror is KP53V75 RA2 LINES the middle of picture from top center left to lower g h inen center right side fractured down the center of the glass TSS Logs for Sony Television Products ra MODEL KEYWORD SYMPTOM The name for this symptom is called line Paring It is most KP41T35 with lines in the pix resembling arcing likely caused by the Jungle IC Suggest the tech try the set in Tech saw this symptom several times in direct the video input mode and see if the symptom shows in that views and the solution has been the flyback Tech mode before any more parts are replaced After a short test it replaced the Flyback and the divider block but still was determined the problem is not caused by the Jungle IC KP41T35 LINES had the same symptom It is the pattern covers because the set ran
108. site input or the S video function and there are no plans to address this phenomena input the color temperature is normal with normal There is nothing wrong with the Television It is operating as TSS Logs for Sony Television Products MODEL KEYWORD SYMPTOM KV32XBR200 serial 9008075 Unit has just had Bulletin 387 did not mention a plate which was in the old the new CRT with the attached yoke replaced i ae toda to correct ihe Shoulder Boll oi svmotonas deflection yoke The missing THL plate needed to be V32XBR200 AA2H GEOMETRY y ame removed from the old yoke and placed in the same slot in described in Bulletin 387 However the new tube i the new yoke After following the new bulletin 387R1 we and yoke did not solve the vertical pincushion Smoon were able converge the set KV32XBR200 serial 9018039 Unit has Shoulder We have changed several yokes so far as of 4 2 99 WITH V32XBR200 AA2H GEOMETRY Roll Off symptom as described in Bulletin 387 LIMITED SUCCESS Performing a complete setup of purity Tech will be ordering new yoke and needs the part convergence and geometry setting corrects most of the number geometry errors However this set will not be perfect KV32XBR200 Unit has just had the new CRT with Bulletin 387 did not mention a THL plate which needed to be adjusted was in the old deflection yoke After following the the attachad yoka rapiacad today 1 corect the new bulletin 387R1 we were able converge the set Al
109. so the V32XBR200 AA2H GEOMETRY _ Shoulder Roll off symptom as described in Bulletin i 9 j new tube needed 3 magnetic on the bell of the tube to 387 However the new tube and yoke did not get correct a purity error and converge the lower right hand installed Instead we are going to contact Sony a KV32XBR200 Unit has just had the new CRT with the attached yoke replaced today to correct the V32XBR200 AA2H GEOMETRY Shoulder Roll off symptom as described in Bulletin See bulletin 387R1 387R2 However the new tube and yoke did not solve the vertical pincushion symptom KV36FV1 AA2H GEOMETRY ek serial Unit has shoulder roll off on the ave tech bulletin 387 for the yoke upgrade Unit has b to horizontal output but no horizontal drive If the Horizontal output is removed the set will produce the A ate necessary drive signals Collector of H driver Q501 C V32XBR200 AA2H HOHDE ee A E E measures 85 with Horizontal output removed Unit appears VOLTAGE turn ofaga Does net Geb nigh voltage to have a shorted Flyback or a problem in the horizontal output section that caused the OCP circuit to attack Product had a defective Flyback transformer MODEL KV32FV1 KV32FV1 KV32FV1 Chassis AA2H AA2H AA2H TSS Logs for Sony Television Products KEYWORD remote remote tuning SYMPTOM KV32FV1 Unit does not operate with remote control Front panel controls are operating OK Unit does not operate with
110. ssis KEYWORD SYMPTOM had tech disconnect the connectors to the M board M CN653 on the G board This removed the load on the 20 volt stand by and let the 12 volt stand by to rise to near 20 volts too It is possible we have two regulators bad IC652 and IC001 IC001 may have been damaged by too much KP46S15 Unit has an over heated stand by voltage on its input because of a defective C652 OR there KP46S15 RA1 transformer The 20 volt source is running at 3 is a sever load on the output of IC001 the 5 volt standby on volts the M board where the 12 volt stand by enters on connector CN053 Pin 1 then to the IC001 a post 5 volt regulator There is also a 1000 mfd 6 3 vdc on the output of the 5 volt post reg Suggest the tech bring out both regulators and the capacitor C002 as a precaution As a idea this board can be worked on outside of the KP46S26 RA1 oie SEEGER CO TAS ie Sours eomayielay All three tubes are leaking Coolant leaking on E board Unit has no high voltage E board is wet from glycol coolant KP61V25 RA1 DEAD KP61V25 serial 9001930 Dead leak from the Red and Blue CRT s that are leaking Red an Blue tube Forcing the power supply on with artificial loads on the amp 135 vdc power supply allowed the supply to run correctly High voltage was disabled by removing G4 connector This disables the B to the High voltage output transistor Q801 It should be known this television has a High voltage output transistor and a Hori
111. suring the 200 volt B at the CRT socket we found the Unthas briahiecreenwithireraca ines hen shule voltage to be under 126 vdc This indicated the 200 volt KV32V25 AA 2 retrace 9 source was not running had the tech check R553 a 47 ohm down i 1 2 watt resistor and it was open Replaced the resistor and the set operated normall TSS Logs for Sony Television Products jE neo foma keo smo fame Unit has bright screen with retrace lines The Unit has the 200 vdc cathode source voltage measures 179 KV32S26 AA 2 retrace flyback was changed but did not correct the Pu sted MESUR me palhods direc Ine voltage symptom is very low 22 vdc Disconnecting the socket causes the voltage to rise back to 198 vdc Unit has a defective CRT Disconnecting the CRT and measuring the RK BK amp GK on KV32S22 AA 2 atrage lines KV32S22 serial Unit has bright screen with the CRT socket we found all of them running at 187 vdc But 02 retrace lines then it will shut down after connecting the socket again to the CRT they immediately dropped to 33 volts Unit will need a KV32S22 serial 8011789 Unit has intense blue Bra AA 2 RETRACE LINES Jraster with retrace lines then shuts down Tapping Tech will need to replace the CRT 8 733 741 05 on neck of tube aggravates the symptom Monitoring the C board Blue cathode terminal the tech found the voltage was less than 70 volts when connected to KV32S22 AA 2 RETRACE LINES a ae a oe Blue eeleen wl retrac
112. t get updated But the MAX Data throughput is finite the entire video waveform will not be accurately represented instead the smaller detailed portions of the picture will begin to have larger pixels so not to exceed the Max Data This is why to the eye the set appears to loose resolution or picture detail This is normal The set has a dynamic focus error Tech needs to see if the Dynamic focus circuitry is running correctly Also before any hardware is tested the parameters of HAMP and DCSF should be adjusted to see if the dynamic focus is effected When adjusting these parameters the values get the best focus when each is mixed out to 60 The focus becomes poor 2 inches from the left side of the screen and 5 inches from the right side of the screen Tech needs to replace the EPROM 1002 corrected the problem This television is operating within specifications The geometry errors should not deviate more than 1 8 of an inch across the length of the Horizontal line Horizontal tilt can be no more than 1 8 of an inch This television beats this measurements There is nothing can recommend to the tech to do to improve on the geometry of this receiver TSS Logs for Sony Television Products MODEL KEYWORD SYMPTOM CURE KV32S45 serial 8102913 picture is rotated KV32S45 AA 2 GEOMETRY clockwise by 1 4 inch Tech claims this tube does not have a pix tilt circuit or rotation on the CRT bell E 6 Secevy Bee GeoMery C 2O vT sanal noses
113. t has a defective PS401 fuse and IC403 in the output stage As for the convergence problem there is a loose connection between the A board and the G Measuring the IC404 7 amp 11 which are the outputs of the 1C404 finds 1 3 amp 32 vdc respectively Each of these outputs must be exactly 50 of the B of IC404 9 which was 32 volts Unit has defective IC404 TA8216 part 8 759 246 70 This set appears to have a slight high voltage arc or corona discharge that is causing interference to other televisions This arc is also causing problems in the video circuit which is why the tech and the customer are seeing it on the screen of this television Tech needs to isolate the High voltage block and CRT from possible suspect by one by one disconnecting them from the high voltage source The only indicator the tech can use is another television and look for the interference to disappear since the Sony will not allow the raster to appear if any one of the tubes is disconnected After the test the it was determined the flyback was causing the problem The radiated noise reduced but was did not disappear It was recommended to replace the G board since the unit was covered under the SAYS program The G plows tuses Sony KP53S35 RA 2 chassis Unit looses PS601 Factory upgrade Replace C815 C897 858 amp 889 from a and PS602 intermittent 1000mfd 35 vdc to a 470 md 35 vdc TSS Logs for Sony Television Products MODEL KEYWORD SYMPTOM CU
114. t top of screen If the color was reduced the banding would disappear Color bar did not have a normal appearance KV27V22 serial 8051260 will not converge the bottom red green or blue horizontal lines The tech needs to set the ID codes to the following IDO 25 ID1 19 ID2 47 ID3 0 ID4 27 ID5 3 ID6 0 ID7 0 If these are OK then the tech will need to replace the IC001 with an upgraded version per bulletin 329R1 Original generic is CXP85640 004S the new generic is CXP856P40S 1 part number T 935 001 61 Unable to see any problem with circuitry and ID codes are correct All appears normal Setting all CC1 CC4 and teletext 1 and 2 to the Minus option this effectively shuts off the closes caption feature Instruct customer to operation od Resistor R354 was not soldered in correctly The resistor is in the Color AFC circuitry It had a 15 ms ripple on it causing a phase shift in the chroma in the first 4 to 5 inches on the picture Problem was caused by a glue used to secure the surface mounted resistor The glue prevented a good connection of the resistor to the pad Cleaning the glue away and resoldering corrected the symptom Unit has over 6 permaloy magnetic on the CRT bell in the area of the bottom of the yoke This is not a good sign It is also a rebuilt CRT We are not going to place more Permaloy strips on this CRT It needs replacement KV32S40 KV32S40 KV32V40 TSS Logs for Sony Television Products 1i MODEL KEY
115. ted the symptom This is caused by the Jungle chip LINE PARING Problem appears to be related to the jungle chip The vertical KP53825 Horizontal lines in pix in the tuner video drive signal is supposed to be a clean saw tooth wave form and OSD Actually the lines appear as gaps but when the problem showed up on the screen the saw tooth between the normal scan lines develops sharp and rapid deviation in the the angular movement of the wave Replacement of the jungle IC The tech was in wrong area of the chassis The area he KP46S25 This set has horizontal overscan Tech should be in is the Horizontal output not the High voltage KP46S25 RA1 HORIZONTAL _ was trying to find a failure in the circuit that houses output The set uses Q510 as H Output and Q509 as pin Q811 output Tech needs to verify the presence of Vertical TSS Logs for Sony Television Products MODEL KEYWORD SYMPTOM CURE There has been a case history problem with the sample and hold capacitors C313 C314 C315 in the jungle IC circuit KP46S25 RA1 no green Sony KP46S25 Unit turns purple looses green These devices become leaky and cause a loss of 1 specific color peso Umt nas no Teale tar T gt to 2O minimes It appears that the Jungle IC 1C301 CXA1477AS may be Unit has high voltage and the timer LED flashes for KP53S25 RA1 no raster causing this trouble The we have Luminance up to IC301 1 the normal 15 seconds then goes out Unit has and OSD at 19 20 amp
116. the voltages were being measured the set began to operate correctly Tech needs to apply power to this unit easily with the use of a variac While watching current go up gradually Suggest that the D board be disconnected and see if it will turn on with no more than 1 amp of current It did not An Amp of current was reached at 38 vac Further checking found a Tech needs to check the B on the emitter of the Horizontal output Tech will need to check the areas around the Q508 and it s drivers It was found the voltage was normal but Q508 C was at 106 vdc But further visual inspection on the driver Q507 found ring fractures in the solder connections in this circuit While the voltages were being measured the set began to operate correctly Q811 shorted Tech replaced the transistor with a 2SD188 Tech checked the distribution of high voltage for pin holes in the lead dress Nothing was found The transistor did not overheat and he let it run for 45 minutes Suggest the set run for a while and see if it shorts again All looks well in its operation TSS Logs for Sony Television Products g moo foras KEYWORD SYMPTOM The duplicated picture is in the proper chroma phase sync brightness and contrast but is slightly elevated in height about 3 or 4 horizontal lines The symptom may stay on the screen for a few minutes or several hours The second phantom picture is delayed by what calculates in the photograph 31 microseconds which
117. they simply cannot produce enough light to achieve normal white balance tracking According the tech the tubes were very dark in the MODEL KP61XBR38 KV13V50 KV27V66 KV32V40 BA4 TSS Logs for Sony Television Products KEYWORD RASTER NO RASTER acoustal vibration SYMPTOM KP61XBR38 Unit has no raster but has PIP Sound and On Screen Display This symptom shows up in the tuner and video input modes Sony KV13V50 No raster Has sound Tech replaced CRT and Jungle chip without any positive results Unit has a slight 60 Hz buzz in the speakers When in the external input mode and no signal applied the hum is evident KV32V40 serial Unit has an acoustical vibration on certain frequencies When checking the monitor output from the rear of the set the video is fine Next we needed to measure the video in to the P4 board This is the digital combfilter Checking P4 32 6 we had good composite video But there was no Luminance out at P4 32 3 All B s were normal on the post regulators on the board Placing a 4 7 mfd capacitor between these points luminance was restored This test proved the combfilter was defective and the rest of the set was OK It appears that IC201 on board may be defective Video can be traced to IC201 25 Clock amp BGP are present at IC201 11 amp 17 Tech will need to replace the board if it is available had tech measure the Cathode of the CRT All cathodes were at 368 volts Thi
118. ting Problem caused by an intermittent B regulator on the G board IC651 1 809 524 11 Replacement resolves problem KV32XBR76 Unit will not turn on No high voltage We have seen a number of these units lately with D1409 KVJZAERIG EN ng high welage Measuring the condition of the D1409 is shorted shorted Often it is simply ring cracks on IC651 causing the problem This unit did have a loose solder connection on 1C651 1 but it did not drop the voltage down enough across D1409 The voltage was always 36 6 volts across a 36 volt TSS Logs for Sony Television Products MODEL KEYWORD SYMPTOM This symptom is a result of a high frequency loss The ability for the amplifiers in the B drive to turn on an off rapidly is a direct result of how high the bandwidth is In this case the three outputs of the Jungle 1C301 20 22 amp 23 had the typical the same vertical spike in the center of the horizontal line on the oscilloscope scope Waveform showing the cross hair pattern was the same value on all three outputs However on connector E1 5 the signal was noticeably lower R359 the supply resistor for Q325 had increased in value to 3 76K KV32XBR76 Unit has poor color registration but color bars appear near normal But when cross hair signal when viewed on an oscilloscope All three outputs had KV32XBR76 POOR COLOR pattern is put up on the screen there are no blue vertical line There are red and green vertical line and all three colors of hori
119. tuner assembly Jumpered trace and tuner not solve the symptom now runs correctly When Isolating the mute transistors find that removing the Coupling capacitor C223 stops the muting action This Capacitor appears to be monitoring the B used for the audio output IC We do have a slight fluctuation of voltage 0 3 KV27V40 8024539 Unit goes looses audio on 0 5 volts to the audio output when the volume is maximized KV27V40 BA4 aido voice peaks or when ever the volume is moved to jout this is coincident to load variations of loud to soft sounds a high position the volume will mute for about 1 However when this variations reach the 0 5 volt deviation the second audio will mute R210 is good and so is Q204 We replaced C223 with a new one and even tried to reduce the value to 1 mfd but we still get the same muting effect on voice peaks I 401 has been replaced on an earlier visit with no changes in the symptom It is unknown why this is causing this KV27V65 Unit has a 60 hz buzz in the audio will Tech needs to add a ground wire to the ground side of R544 uA near minimum level is selected to the ground under the flyback transformer TSS Logs for Sony Television Products Ea MODEL KEYWORD SYMPTOM KV27S42 The clock should remain within 7 seconds or minus in a KV27V66 serial Unit looses 3 minutes a in 2 a panon me ime n SM en eure clock we count down circuit inside the microprocessor Suggest the weeks on the internal clock i
120. utput from the blue CRT Swapping the green to the blue socket does not transfer the trouble Tech needs to check into the possibility that the convergence output are being rail to either side of the power supply The process of disconnecting the sub deflection yokes from the G board then power up the set will eliminate the possibility of a fuse blowing in the event that a convergence output IC is being railed to either power supply Tech also needs to check the bulletin 344 related to reducing the value of 4 electrolytic in the convergence circuit C858 C859 C815 C897 These must be reduced from 1000 mfd 25 vdc to Asked tech to remove Q502 B amp E then measure Q502 collector After unit is turned on It was at 135 vdc Q501 C was at 77 vdc Unit has Horizontal drive at Q501 C This indicated the unit had horizontal drive Scope reading showed a 60 40 duty cycle at 63 microseconds There are no apparent short circuits on secondary of Flyback transformer Unit has defective Flyback asked the tech to reproduce a stair step waveform on the screen The stair step was to be interrogated very closely for any anomalies on the steps or in the Sync area of the signal Video looks great at the input of the PD board CN3401 6 But there are fine overshoots on each assendig steps of Luminance on all steps measured at the Y output CN3401 2 An overshoot on the 7 5 IRE step is in excess of 4 volts Each after the first step has an over s
121. vere load on the output of IC001 the 5 volt standby on the M board where the 12 volt stand by enters on connector CN053 Pin 1 then to the IC001 a post 5 volt regulator There is also a 1000 mfd 6 3 vdc on the output of the 5 volt post reg Suggest the tech bring out both regulators and the capacitor C002 as a precaution All power supplies are normal in operation Unit has Horizontal sweep when checking the Q505 C we have over 900 v peak to peak We do not have High voltage or high Unit is Dead Was hit by a power surge D655 was voltage drive to Q801 B or Q810 B find no horizontal drive defective Unit still will not power up after the Checking the HV protection circuit finds the IC902 1 is device was replaced sitting at 6 2 volts This is because IC902 7 is higher than IC902 6 This is attached to the OCP circuit It is conceivable the flyback is shorted due to the fact the 135 vdc OCP line is being triggered Unit did have a shorted had the tech measure the Standby B at the input of Unit will not turn on At no time can a Click be IC652 1 The voltage should be 24 vdc We only had 9 volts Dead heard from the G board when the power is Checking with an oscilloscope we found 22 volts peak to KP41T15 A KP46S15 applied or when the power is turned on peak on the input of the regulator Unit had defective C667 a 470mfd 35 vdc Replacing the capacitor corrected the TSS Logs for Sony Television Products MODEL KEYWORD SY
122. wer supply and we has an open start up removes the 200 vdc load created by all 3 CRT resistor in the base circuits of C601 Tech needs to check drive modules does not allow the set to turn on R609 R610 R611 R612 all are 220K and have been known to open causing a Dead Set condition TSS Logs for Sony Television Products i MODEL KEYWORD SYMPTOM CURE Tech did not measure any voltages on the G board These Unit is dead Will not start up Just has the flashing must be confirmed before we can possibly know where to go red LED on the front of the set Disconnecting the looking for what might be wrong It is possible nothing is KP53V75 RA2 Dead connector CN501 which removes the 200 vdc shorted in the power supply and we has an open start up load created by all 3 CRT drive modules does not resistor in the base circuits of IC601 Tech needs to check allow the set to turn on R609 R610 R611 R612 all are 220K and have been known to open causing a Dead Set condition gt i i H s 3 KP41T35 RAD Ghost KP41T35 serial 9102191 Unit has ghost line across Tech will need the PT board Noise artifacts are seen while the screen looking at the Y signal out from this board The stereo led flashing is not the typical LED is to indicate the system control is waiting for a acknowledgement from the Jungle IC When this set goes into the failure mode it kills raster and sound but High voltage remains Closer inspection also finds the
123. zontal line form 1K Replaced R359 surface mount resistor corrected KV32XBR36 KV32XBR36 Unit has a slow compressing and vertical i decompressing of the vertical sweep KV32TS27 7039676 Unit has an intermittent audio squeal in the audio when trine to receive a stereo broadcast KV32XBR50 Unit has sever horizontal overscan horizontal Measuring Q505 C the voltage was near 0 volts Tech changed Q501 but the transistor shorted in less than 5 seconds Sony KV27TS27 LN 1 chassis predominately red red raster picture KV32TS27 KV32XBR50 KV27TS27 Unit has AFT drifting as soon as the channel is o KVATABRIQ addressed It never stops the AFT search Unit needs to have the IF Demodulator module removed from it s shielded compartment and resolder all the adjustable tuning transformers The AFC coil transformer has ring fractures around the pins that protrude through the Q605 was not soldered well Tech needs to replace the Audio IC SBX1627 11 IT was discovered that the Q505 was shorting collector to emitter Also R571 was also showing signs of overheating It was suggested that L501 amp R571 be replace with a new Q505 The set now runs correctly When shorting out the RGB cathodes on the CRT the set will get a perfect black and white picture but shorting out the RGB inputs on the CRT board the set is missing green Trouble is a defective green output transistor TSS Logs for Sony Television Products MODEL KEYWORD SYMPT
124. zontal output transistor Q508 With the HV disabled we could check out the H output stage with reduced B and current by placing a 40 watt light bulb in series with the 135 source Al power up with the shutdown defeated the bulb lit up brilliantly This indicated too much current A process of elimination indicated C514 was breaking down under operating voltages The value was a 0068 1 2KV physically measured 001 mfd Replaced KP61XBR48 Unit is dead Q601 amp Q602 are shorted along with R607 open Preliminary checks of the secondary loads on this supply indicate no shorts circuits Replacement of these devices again resulted in the instant failure of these transistors again KP61XBR48 RA1 TSS Logs for Sony Television Products Fa MODEL KEYWORD SYMPTOM KP46S15 DEAD Unit has leaking CRT s Both red and blue Dead CRT s are noticeably leaking with the green Unit will need replacement CRT and the convergence output showing signs of moisture around the expansion __ IC s chamber had tech disconnect the connectors to the M board M CN653 on the G board This removed the load on the 20 volt stand by and let the 12 volt stand by to rise to near 20 volts too It is possible we have two regulators bad IC652 and IC001 IC001 may have been damaged by too much RAY Dead Unit has an overheated standby transformer The voltage on its input because of a defective IC652 OR there 20 volt source is running at 3 volts is a se

TSS Logs for Sony Television Products

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