SHARP SERVICE MANUAL - The Sharp MZ
Contents
1. 3 F 0495 z j 5 vIDEO 4 5 SIGNAL P 0501 T SCREEN CONTROL TO FOCUS CONTROL 2SCIB26G SYNC RED oroe ON HORIZ OUT XFMR ON HORIZ OUT XFMR VERT OUTPUT 1 2K t daos lE _ e M M SS ee R519 7 520 5 y TK 8524 5404 390 390 S Coie HA 2SAIOI5 Y jew 35v 35V z RAB 21482 32 H EXOOBICE o fai 44 560 560 450 5 uv a A B L Bi C510 ig v CENTER 1048 20402 3304p 4 H EXODASCE H E XOOAITA 4 51v 5 OXGGSAEE 91 e Pr 0 R404 im EAS 27 3 5 56K 152473 x2 0502 1 8 o d s 2100 2548 i 2w 0401 5 25 85410 162475 ic R521 R522 R52 R528 R529 R530 P H DXOO46CE 2SA67 3 B 5 1 220 100 ATO rt 4 2 152471 25A562T O0 Cib 3 ee x 1 x S M 2419 20K BLANKING 1485 _ ee a LEER IU 2605 H SIZE x eM Ld CILZ0 8TA 9 v pe ADR 4 cC5lI4 RSS R630 a i n 7 Be i 409 gt s p D TEP vend szara i 2K 0 02. 2 1005 SHARP SERVICE MANUAL PRODUCT OUTLINE The MZ 1D05 is the 14 color display unit designed for personal computer terminal Mz It is driven by three independent video signal inputs of B and separate synchronous signal inputs of and V Input signals are supplied through the round 8 pin DIN connector SPECIFICATION Input frequency band Video signal input circuit Video signal amplifier Vertical oscillator Horizontal oscillator Pincushion distortion corrector Power rectifier Power stablizer Demagnetizer Display tube Display tube size Power consumption High voltage output ICs Transistors Diodes SCR Video signal frequency 3 stages CR ocsillation CR oscillation Right to left saturable reactor type Capacitor input bridge rectifier SCR phase control Automatic posistor 12 90 degree deflection 320MAB 22 21 8 wide x 21 1 high x 33 5 diagonal cm 58W 22KV 4 chips 15 pcs 35 pcs 1 pc SHARP Supply power Cabinet Physical dimensions Weight Input signal cable Video signal input Synchronous signal input AC cord Accessories CORPORATION CODE 00ZMZ 1D05 E COLOR DISPLAY UNIT M Z 1DO05 220V 50Hz Plastic 36 4 w x 42 5 d x 37 0 h cm 13 5Kg Round 8 pin DIN connector R G B three indepen dent input method Input level of 2 4 to 5Vp p positive polarity H
3. 601 a j m 249 5 L604 560 Li 2WI IINE mie o TO ER Enn nae NE BS Btooaace 42 28508 TRNODOSACE reads sane 182475 T IOKLB VR B87O076TA 505 50 2 294 227 FOCUS 39K BRIGHT R502 590 5 CONTROL 2 2K zJ ex SCREEN 1701 j 4 CONTROL s i C50 b I1X0137 E 05877 POWER REGULATOR C511 ord 21 39P eg 330p TH B 257 1601 Im qelnT o pipi MH 1 0065 x l sza758 77 v s sv Jos 15 ML e 1 2 3 HIGH VOLTAGE 32 i 0604 ai CR BLOCK E 41 R629 H DXOIOICE IRTOT CT 4 RET OCOS3CE 5 iRF I 2 06 VR BTOB2ZTA VR MTO46TA sh V HOLD L _ gt ITPBA _ TANZOOSSCE RTI po gt RTI 60 SYNC LN pues 55 J ae RTO 4 70 C799 TP9I 701 A Sie 14 L60 1 SS6142F cw MU ERB26 20 4 SS6192F 200v R609 R6iO C609 ver gt 390 001 cero AA 3 VE cit 001 lt A noa TRNCOO28CE 0704 0701
4. Capacitor 50WV 1uF _ VCEAAAIHWIO06M Capacitor 50WV 104F VCEAAAIHW337M Capacitor 3304F C510 Capacitor 50WV 4 7uF C615 Capacitor 50WV 47 C708 Capacitor 160WV 100uF 707 619 Capacitor 250WV 22uF Capacitor 6 3WV 4704 Capacitor 16WV Capacitor 160WV Capacitor 200WV 0 47F Capacitor 1600WV 8200pF Capacitor 1600WV 3900pF Capacitor 25WV_0 01F Capacitor 50 150pF Ca 500WV 1000pF Capacitor 500WV 4700pF Capacitor 500WV O 0104F Capacitor 50WV 1000pF C609 614 Capacitor 0 010 F C711 712 482 611 Capacitor SOWV 150pF Capacitor 220pF 50V Capacitor 50WV 0 014F Capacitor 50WV 0 0224F Capaci F citor 100WV 2700p Capa Capacitor SOWV_0 018uF Capacitor 50WV 2200pF Capacitor SOWV 0 027uF Capacitor 50WV 0 0564F DESCRIPTION Resistor 100 Res 00 ____ Resistor 1 2W 2 7KQ 10 R880 882 Resistor 1 2W 4 7KQ 10 Resistor 1 2W 470 0 10 7 Resistor 1 4W 1 00 5 Resistor 1 4W 1000 5 Resistor 1 4W 1 0KQ 59 R408 451 461 471 Resistor 10KQ 1 4W 5 R405 407 622 505 Resistor 1 4W 1200 5 Resistor 1 4W 1 2KQ 5 R409 452 462 472 Resistor 1 4W 12KQ 5 R511 606 403 Resistor 1 4W 15KQ 5 R603 710 632 C jResis
5. V seprate synchro nous signal input method Input level of 2 4 to 5Vp p nagetive polarity 3 core wires 2m with detachable plug Instruction manual and AC cord 2 1905 OBSERVANCE CASUALTY FREE JOB AND CHECK OUT OF SAFETY PERFORMANCE 1 Strict observance of given cautions Those sections that require special attention i e cabinet chassis and component parts are cautioned on label or by stamp Job has to be carried out in accordance with those cautions and others mentioned in the instruction manual 2 Use of genuine parts Component parts are manufactured in compliance with safety requirements pertinent to indivisual parts i e non inflammability voltage withstanding property etc In this view component replaced must be identical to the original parts in its characteristics As critical components required for safety performance are noted with mark in the circuit diagram and parts list they must be replaced with the genuine parts 3 Proper replacement of removed components and wirings For safety s purpose some of items are insulated with such as tube or tape or isolated from the printed card As for wirings they must be replaced on original positions as they have been installed for free of heat and high tension taking their routes into consideration and by supporting them with such as clamps How to select supply voltage setup Power supply setup must be done in the follow ing manner acco
6. computer Check the Is ther 6 4V on video tube and the collector of its peripheral OK Q402 circuits NE Dod O401 or O402 or T602 or C854 eaters their peripheral of the video 2 1 circuits tube or 1 SCREEN VR 0401 R413 0402 20402 NOTE In case picture does not appear on the PICTURE DOES NOT APPEAR screen try to turn the BRIGHT knob fully clockwise before check t Check the video signal on the base of Q452 using the oscilloscope Is the video signal on Check the video input circuit and its peripheral circuits Check the video signal on the base of Q851 using the oscilloscope Is the video signal on Input cable in put socket Check Q402 Check 0452 through 1491 computer its peripheral Q851 and their peri 0451 471 0r circuits pheral circuits 0451 471 SYNCHRONIZATION DISABLED Horizontal or vertical syncchronization not 1601 R608 enabled R602 C601 Check appearance of sawteeth waveform Manipulate H HOLD to see if a change is and synchronization signals on pin 14 of met in the horizontal synchronizing fre 1601 quency 1601 C501 R502 C504 VERTICAL SWEEP NOT ENABLED VPORTANT inani avoid damaging the video tube Ripple current signal appears on the junction of F702 and R703 Send ripple current signal to pin 2 of 1601 via the serial
7. 0 10 eo 12 LX N23062CEZZ 13 0001 00 14 PSPAGO0O023CEZZ 17 1 Mechanical parts NO 7 Z 1065 TP91 701 402 32 MEET eT 3 3 5 3 2 2 0 2 DESCRIPTION elo 2 5315 od EE an Sjo ge lt jo PART RANK PRICE RANK Cabinet parts PARTS CODE o 8 2 I 5 wh ag td 5 2 9 oro Oi lt lt NO m NIN N e lt NINININININ TN NINN lt lt lt lt lt lt lt lt 4 o gt 0 Land am irim olo I 2 ojaj gt jojojojz 00 lt lt lt lt lt gt 4 ae Caution card Caution card x 3 8 ca olo 8 lt 323233 3 3 3 3 C A
8. connected resistor 1 kohms and capacitor 10uF Raster is sweeped verti Does not sweep cally 1601 D502 0501 0503 0502 R503 DY601 R504 0504 R507 R505 R507 Continued on page13 1 n 2 _ 4 5 5 SCHEMATIC DIAGRAM AND WAVEFORMS 4 200vP P iH 8 VIDED INPUT 261 s 5 rcm cesi Trev o ev zv rev ov au ias _ __ aia Ji i i 1 4 gt i 4 a Q472 aj T 1 l 2SCIBI5 Y 9853 al 491 659 2 25C2068LB 2202 afg lt 4 B AMP RBA j 4 ae T 3 L_ P BLUE OUTPUT 470 2852 TT Ej 270 84945 CARE H DXOOSSTA ass 47 A 1 270 220P 1152076 0652 C 4 86 0O10CE 6 Y 0492 E ln cmm 0471 270 25 1015 T ima CONT CONTROL 1 EO 152473 AMP ER PO eee E EU R4IS LI CNW O34HTA pags m 270 cass lt 220P p VR B4224CE Ria 250 x B DRIVE I VR B7076T14 xx CONTRAST 1 Ed ae
9. in connection and with the video input signal of OV screen not working under the given rating 1 Voltage value is the value measured by the 20kohms V voltmeter NOTE 2 H and V in waveform description represent repeat frequency H 15 61Hz V 50 0Hz 2 Resistor and capacitor rating description Resistor Capacity No mark ohms K Kohms M Mohms Error No mark 10 J 5 Rated power No mark or 1 4W Capacitor Capacity No mark or u uF P pF Rated voltage No mark 50V Type No mark Carbon film No mark Ceramic Solid Mylar Metal oxide film Polypropylene film Meta film Film Cement Tantalum Special Styrol 3 Test point noted in parenthesis has no pin 8 LEAD WIRE SHAPING AND WIRE THREADING METHOD Coating earth lead 205 9 PACKING OF THE SET Knob Positions Accessories Poly bag 55 2 2 Instruction Book TINSZ7011TAZZ Dast cover SPAKP6416TAZZ Printed material in the bag is contained Cushion SPAKA6416TAZZ Carton Europe Except UK SPAKC7011TAZZ UK only SPAKC7010TAZZ Serial number card TLABKOOO1TAZZ bottom are stapled 16 2 1005 PARTS LIST B370MA DESCRIPTION B Picture tube 6 IC H AND V 1601 3 0 IC SCR Power 1701 1481 491 DESCRIPTION Thyristor SCR701 Transistor 0401 451 461 47
10. 1 T 560v 0602 E di 6705 TRNCOORBCE 6108 ACISOVI ak 250869 1 nmr 0068 R606 0601 HORIZ OUTPUT 1706 6 pt 500V 50 T 2SC24B2 A X Loi m 7 HORIZ DRIVE o o A FZO is say ovo Aiea vie 2 0 gt ng H p IS0V ML T der 004 JCE SUM Mano then EE Fs Cie2Im C KZ004 NUNT CETTE CELS LA ee JCE 2 1 R603 C6OB 1 R625 VR a gt H DXOOSBCE ISK JF 100p 100 lt HS HOLD Pti 2 T v sa a 151887 680K lt iewi 26 1 7622 20801 J Ag E 629 59627 RE 5322222 TA 47 00 p en ME a ee Ie 060 519 SOKIB VR M7242TA 10602 652 H DXOO48CE H CENTER isk 152473 C614 Am izvi 00 60 9 949 2 2 1005 f 55 m 7 6 0851 045 1 AM 2SC206BLB H DXOOXSZTA RED OUTPUT R 52076 8 ire 78V 1 ml UC S Jer 1 ja Q45I R453 caos 2SAI01I
11. 1 Transistor Transistor 0452 462 472 Transistor 0501 0502 Transistor 0851 852 853 Transistor H Drive 0601 A Transistor 0602 DESCRIPTION D451 461 471 D701 704 191887 10401 0402 405 D604FR 1 Zener diode 20402 Zener diode 20701 702 Zener diode Zener diode 20481 Zener diode 20401 Zener diode 20601 Photo transistor m ps 22 SIKH Hla Coo gt gt 2 00 02 Gol 27 22 Mmmm mim 2 gt mimi 2 gt gt NINININININININININININININ mim mimimi o gt lt gt lt gt lt gt lt gt lt gt lt gt lt gt lt ejojejlo joioijoioiolioiolo nimm nI S SOC SEI SINT NINN 4 Packaged circuits PARTS CODE DESCRIPTION AL_I RMPTPO022CEZZ AN Block resistor PR701 Coil and Transformers 1 DESCRIPTION Coil Degaussing coit ADG L701 Choke transformer B Choke T702 B H VOLT Transformer Power transformer Europe except U K Power transformer U K onl Pin Cushion trans Side Pin B _ Transformer Drive T601 C Peaking 1601 PRICE NEW PART NO ARTS CODE PRICE NEW PART DESCRIPTION AD B __ Variable r
12. 59 Resistor LW 3 90 5 Resistor 1 2W 1500 5 Resistor 1 2W 820 5 Resistor 1W 2700 5 Resistor 3900 59 Resistor 1W 3 9 0 5 Resistor 1W 5 6KQ 5 Resistor 1W 8200 5 Resistor 2W 1000 5 Resistor 2 1 2 0 59 Resistor 3 9KQ 2W 5 Resistor 2W 3300 5 Resistor 2W 8 2KQ 5 Resistor 1W 5600 5 6 R Resistor SW 1 80 109 VRD RA2HDI Resistor 1 2W 1 5KQ 59 2 3 4 0 1 2 4 0 1 8 2 9 1 1 6 1 0 1 7 9 1 0 1 1 2 2 1 1 2 2 1 2 1 8 2 j E J J J J J J J J J J J d J J J J J J J 1 1 1 j J J J J J J J J J K J R 0 R 9 2 R 0 5 7 2 4 R 5 2 7 9 9 6 2 0 2 9 3 2 5 DESCRIPTION K Magnet Heat sink 10501 502 YO Heat sink 10501 502 YO Heat sink Heat sink Insulator Insulator AC cord U K only cord EUROPE except U K Fuse holder Plug 3pin SW AA Plug 2 C Plug LED YO _ AB Plug 4P PLG 2 PT C g DY YO AK Socket AC INLET AA N C Socket AB Socket 2pin LED AA Socket Socket Spark gap Spark gap C S
13. C AC A B THIN gt Printed Japan R SHARP CORPORATION Industrial Instrument Group Reliability amp Quality Control Dept Yamatokoriyama Nara 639 11 Japan July 1983 DESCRIPTION Packing case EUROPE except U K x 8 c EE 3E gt 513 m x S D N N MARK as PRICE NEW RANK 10 2 16 70 64 C7011TAZZ PARTS CODE AK AK AK SP SP SP S T 22 5 00036 22 iNSZ7011TAZZ 17 TLABS0041TA2Z2 The others parts 1 2 3 5
14. SLY A CONT CONTROL r 27 em VR B4224CE DRIV 25 1815 MESS I 046 6 j 2SC2068LB o 2v 15 Ee 56V 152076 a gt i E ES c pom kase GREEN fe Resi OUTPUT fav 47 ae Q46 AWA er 1491 HD7406 23410159 4 uA RBST 330530 13 CONT CONTROL R464 5 6 E E SPECOOLI 8 10 _ 11 10 2 1 12 12 0702 0404 482 9 io K603 20605 6584 e 1 R415 R507 R5I4 CONTRAST V SIZE 9 V HOLD 9 P W B A Mother Board Wiring Side 11 P W B B CRT Socket Board Wiring Side Na EF got Ec 1 i EJ 3 705 TOB ov gooVv P A E70 ros Power Supply P W B 3 10 11 12 742 12 2 1005 SPECIFIED COLOR DOES APPEAR Raster in green or F Raster in red or cyan Raster in blue or yellow Check the red video circuit Check the green video Check the bl
15. esistor Drive R856 858 B Variable resistor R863 865 B Variable resistor V Line R526 200B Variable resistor SUB BRIGHT R419 B Variable resistor R415 420 Variable resistor R514 607 D Variable resistor Variable resistor B ADJ Variable resistor H CENT C701 Capacitor C703 704 618 Capacitor 50WV 15pF C451 461 471 acitor 50WV 220pF C855 857 Capacitor 50 180 Capacitor 50 39pF C511 Capacitor 6 3WV 4704F C513 Capacitor 16WV 10uF C602 607 lt lt lt lt lt lt lt R B4 R B 4 R B7 R B7 R M7 zooo binin gt gt 59 2 x gt 4141414 41 mimimim NIN NININININININ NINININ mINININ E am DESCRIPTION 17 2 1005 7 Capacitors PRICE NEW PART NO PARTS CODE DESCRIPTION STVCEAAAICW107M Capacitor 100uF 16V C505 608 626 10 1 226 Capacitor 16WV 224F C401 11 12 13 14 VCEAAA1CW227M Capacitor 220uF 16V C404 481 1 106 Capacitor 25WV 10 VCEAAUIEWI107M Capacitor 25WV 1004F VCEAAAIEW337M Capacitor 25WV 3304F _ VCEAAA1EWA76M Capacitor 25WV 47 VCEAAULEW477M Capacitor 25WV 470uF VCEAAALHW1O5M_
16. ition 3 Adjust the FOCUS knob to obtain an optimum o focus 4 Manipulate the BRIGHT knob to see that it is in a optimum of focus Test signal 2 WHITE signal 10 PRINT 20 FOR 71 TO999 30 PRINT H 40 NEXT 50 GO 50 1 1 20 COLOR 30 PRINT 40 GET AS 50 IF THEN 70 60 GO TO 40 70 NEXT 80 COLOR 0 90 PRINT 100 END 4 TROUBLESHOOTING POWER NOT IN SUPPLY Is there 130V between positive pole of SCR701 and ground Insert zener diode 60V between the gate of SCR701 and the junction of F702 and D705 Connect to the zenor diode at the gate of SCR701 Power circuit in operation now Insert 50Oohms 15W resistor between TP91 and the junction of F702 and D705 Horizontal synchronizing circuit in operation now 15 there 18V between 1701 and ground 5 there 7 8V between 1701 and ground SCR701 R712 R705 C709 C710 750 0704 701 1702 F702 7701 0701 R701 0702 20701 0705 20702 R704 MZ 1D0 RASTER DOES NOT APPEAR 15 there 110V between TP91 Power supply hori zontal synchroniza tion or protect 1 circuit Check the dc voltage level on the collector of Q851 Under the normal condition the DC voltage could be vary between 160 140Volt when turn the bright ness contro VR Check for contact failure in connectors interfacing the video unit with the
17. lockwise increa ses the B voltage Watch the voltmete while ad justing so as to avoid too much voltage increase Adjusting horizontal synchronization 1 Set the personal computer so that the same letter should be displayed on an entire screen area on an entire data display period horizontal 36 088 5 vertical 12 811msec using such as alphabet letter of H see Test signal 1 2 Adjust the H HOLD knob so that the picture should situate in a middle of the screen 3 Try to turn on and off power for a few times to see that the picture is stayable Adjusting horizontal amplitude 1 Set the personal computer so that the letter should be displayed on an entire screen area on an entire data display period horizontal 36 088usec vertical 12 81 1 see Test signal 1 2 Adjust the horizontal amplitude coil so that the ampli tude on the center should become 245mm NOTE Tuming the horizontal amplitude coil clockwise will make amplitude increased Adjusting vertical amplitude 1 Set the personal computer so that the letter should be displayed on an entire screen area on an entire data display period horizontal 36 088 5 vertical 12 81 1msec see Test signal 1 Adjusting white balance 1 Turn the SCREEN knob fully counterclockwise each of RED GREEN and BLUE bias knobs fully clock wise the BRIGHT knob fully clockwise maximum and the RED BLUE knob to a midwa
18. n plug 297 W 5 fies 1089 RN L702 1 PARTS IDENTIFICATION FRONT SIDE POWER INDICATOR LAMP POWER SWITCH REAR SIDE CONTRAST H HOLD SERIAL NO LABEL BRIGHTNESS V SIZE Figure 1 2 REMOVING MAIN PARTS COMPONENTS Figure 2 Removal of the rear cover 1 Disconnect the AC cable 2 Untighten two screws that secure the upper part and two other screws that secure the lower part of the rear cover 3 Remove the screw then pull off rear cover 4 Untighten the screw Rear side of the printed wire board Figure 3 3 ADJUSTMENTS It needs a personal computer i e MZ 700 to carry out adjustments Even though everthing had been adjusted to their opti mum points before the unit left the factory it has to be adjusted in the following manner whenever parts replace ment is done or when an adjustment error should occur e B power supply circuit It needs the voltmeter with internal resistance of 20kohms V 1 Ensure that the ac supply is above the rating below depending on power source rating 228V for 240V set 209V for 220V set 2 Adjust the B potentiometer so that there should appear the dc voltage of 110V between TP 91 and ground NOTE 1 Supply of required 110V may not be obtained when the source voltage is under the given rating but there would be no specific problem NOTE 2 Turning the B potentiometer c
19. park gap C Push switch Sw750 Terminal DESCRIPTION Fixing metal Fixing metal Fixing metal Fixing metal Fixing metal 19 DESCRIPTION DESCRIPTION metai ing Fixi lt lt lt lt lt lt lt Oja lt lt lt lt lt lt lt m lt lt lt lt lt lt lt lt lt N SISLOISIO OININIZSISISINISININININININ gt WWILINILININININININ lt NINININI MIN Et LOW Slew ajajaj ejoiojojlojeiolelojei iuv o oijoiojolo oi o olojleielei 4 3 MOM 2 gt 2 2 j 2 5 lt jajaa 01 1 5 5 5 3 jure 2182 gt lt gt lt 10210 ale alse RANK MARK RANK lt a 2 0 PARTS CODE I LHLDF1016CEZZ PARTS CODE 2 LHLDW1013TAzZ Nim rie mio Ola jo Am 7 LX BZ3086CEFD 9 LX NZ0023TAFD NIN NUN eje ojo 0 lt lt
20. rding to the power source rating For 220V region change K701 plug to K703 For 240V region change K701 plug to K704 F701 T1 6A O 2 L 1 N 4 Careful handling of video tube Because the explosionproof video tube is in use it will be safe against explosion so as long it is installed in the cabi net But sufficient care must be paid to avoid shock to the cone of the tube in working on the core from the back of tlie unit or when the tube is removed from the unit 5 Radioactive hazard As safety means are implemented for the video tube and the high tension peripheral circuits in order to protect radioactive hazard use of the genuine parts becomes neces sary in repairing the high tension peripheral circuits It is also mandatory to avoid any circuit modification Use of components of any other make may increase voltage in high tension line which may cause to emit radioactive ray from the video tube 6 Safety check out Before completion of your job you must ensure that such screws components and wirings that removed during servicing have been properly replaced on their original locations and see that there is no damage around the ser viced area Also check insulation among input signal ter minal external metallic portion and cable plug Safety performance must be ensured at all times before completion of your job Power Supply PWB O K702 4 2 65 To 2 4 1 pi
21. tor 1 4W 1 8 0 5 41 Resistor 1 4W 18 5 Resistor 1 4W 2 2KQ 5 Resistor 1 4W 220 0 59 Resistor 1 4W 2700 5 Resistor 1 4 2 7 0 5 Resistor 1 4W 3300 5 Resistor 1 4W 3 3KQ 5 Resistor 1 4W 5 Resistor 1 4W 3900 5 Resistor 1 4W 3 9KQ 5 Resistor 1 4W 470 5 Resistor 1 4W 4700 5 R413 453 436 473 Resistor 1 4W 4 7 5 R509 602 626 Resistor 1 4W 47KQ 5 Resistor 1 4W 560 5 Resistor 5600 1 4 5 R711 481 483 Resistor 1 4W 5 6KQ 5 R404 _ Resistor 1 4W 56KQ 5 R706 18 8 Resistors ae DESCRIPTION CODE RANK MARK ONCE wade _ Resistor 1 4W 6 8KQ 5 8 Resistor 1 4W 68KQ 5 jmimm _ Resistor 1 4W 680KQ 5 C jResistor 1 4W 820 5 Resistor 1 4W 8200 59 Resistor 1 4W 8 2KQ 596 Resistor 1 4W 820KQ 35 TResistor 1 2W 1 00 5 _ 20 20 2 23 20 20 OOOO Resistor 1 2W 4700 5 Resistor 1 2W 6 80 5 Resistor 1 2W_1 0KQ 595 _ Resistor 3 90 1 2W_ 5 Resistor 1 2W 3900 5 R 8 8 2 2 2 2 R 7 Resistor 1 2W 1000 5 Resistor 1 4W 1500 5 Resistor 1 4W 470 5 Resistor 1 4W 8200 5 Resistor 1W 0 470
22. ue video at 1491 0451 0452 and circuit at O462 0461 circuit at Q472 0471 Q851 and 0852 and Q853 1491 R881 0462 C851 0461 C857 Q852 D461 R864 Continued from 8 13 7 CHASSIS LAYOUT 370MAB22 CRT PWB_ CONVERGENCE PURITY MAGNET ead tee to 1 plug mes 148 INPUT CIRCUIT DEM 1491 MAIN PWB VERTICAL OUTPUT C706 0 502 R 49 SUB nr POWER l arc 97 220V K701 701 N POWER SUPPLY PWB K702 705 K703 1702 C701 F1089TA 1 N V H R707 0 501 CIRCUIT ADJ SCR 70 ION y D POWER OUTPUT R 526 701 ee V LINE FUSE REGULATOR 1 9 1 SIDE PINCUSHION FOCUS PACK 5 HV 5 B c H OUTPUT c i H DRIVE 2 v9 LL 1043 T602 FORCUS n ii t 9415 V SYNC H SYNC SCREEN V SIZE BRIGHTNESS CONTRAST NOTES ON WIRING DIAGRAM There may be a slight difference depending on the serial number because this wiring diagram is the basic wiring diagram Since the parts component noted with a A mark is criti cal for safety performance it has to be replaced with the genuine parts for safety s sake as well as maintaining pro per performance of the unit 1 Voltage values and waveforms indicated in the wiring diagram are the values that measured with the personal computer MZ 700
23. y position 2 Set the personal computer so that an entire screen area on an entire data display period horizontal 36 088 psec vertical 12 811msec should become all white see Test signal 2 3 Pull out the service chip V1 4 Turn the SCREEN knob clockwise until a single color raster becomes slightly visible 5 Tum the BIAS knobs of two other suppressed colors counterclockwise so that raster should appear white gray Slightly decrease the SCREEN knob until raster disappears 6 Replace the service chip V1 7 Manipulate the personal computer so that an entire screen area on an entire data display period hori zontal 36 088usec vertical 12 811msec should remain Test signal ex MZ 700 Test signal 1 1000 characters H signal 2 Adjust the V AMP knob so that the amplitude at th center of the picture should become 183mm all white see Test signal 2 8 Adjust by means of the RED BLUE knob so tha raster should turn white 9 Set the BRIGHT knob to the maximum position the adjust the SUB BRIGHT knob R419 so that dc 5 6 should appear between TP 402 and TP 403 10 Try to vary the position of the BRIGHT knob t ensure white balance at both extremes of bright an dark 11 Repeat Steps 3 through 10 above to attain lete adjustment Adjusting focus 1 Set the personal computer and bring letters appeare on the display see Test signal 1 2 Set the BRIGHT knob to the maximum pos
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