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Panasonic 10th Generation Plasma Seminar

1. LOW 15V ON H C CO PANEL MAIN ON H 51 Panasonic ideas for life P15V P5V Circuit The P15V is generated when the power is turned on The high 3 2V Panel Main On command from the board is applied to pin 24 of the Power MCU 501 on the Power Supply board When IC501 receives this command on pin 24 3 2V pin 10 goes high 4 8V When the power on command is received the F STB ON command 3 2V is applied to pin 23 of IC501 When pin 23 goes high just like during standby the relays are closed the PFC circuit is on and pin 15 goes high to turn on the low voltage power control 520 to drive the oscillator circuit 0408 0409 Q412 and Q413 When this happens voltages are developed by the secondary circuit The rectified 15V from T404 is applied to the DC DC converter Q555 The output of Q555 is controlled by the voltage on pin 4 The high from pin 10 changes the bias of Q569 to provide 22V to pin 4 of Q555 turning it on When Q555 is on 15V is output on pins 1 2 and 3 This voltage is applied to the 5V DC DC converter IC510 to output the PSV 52 Panasonic ideas for life Vsus Vda Circuit T404 _D531 1 PANEL MAIN ON 53 Panasonic ideas for life Vsus Vda Circuit The 3 2V from pin 11 of connector P25 is applied to the PANEL_MAIN_ON pin 24 of the POWER CPU 501 When pin 24 goes high 14 goes low to provide the ground path to turn on the LED
2. OUTPUT CONVERTER SF PROCESSOR DRIVER E s lt 55 1 9200 1C9303 9901 RECEIVER LYDS Signal From A Board IC9003 SUB MICRO PROCESSOR To Board DATA TIMING Level Converter To SC Board 109802 DISCHARGE SCAN CONTROL I 1c9803 Es CONTROL SUSTAIN CONTROL css Y Panasonic ideas for life To SS Board D Board Block Diagram Component IC9500 LVDS RECEIVER DISCHARGE CONTROL 9802 3 LEVEL CONVERTER 3 3V gt 5V IC9900 PLASMA Al SUB FIELD PROCESSOR IC9303 FLASH MEMORY IC9901 DDR SDRAM IC9003 SUB MICRO PROCESSOR IC9200 CLOCK GEN Discharge Control IC9500 of the D board contains the Discharge Control circuit that analyzes the RGB and sync information of the video signal to create the Scan data to drive the Scan operation SC board and Sustain data to drive the Sustain operation SS board The SC board is responsible for the generation of the scan pulses Scan pulses are used for initialization and selection of the pixels The SS board is responsible for the generation of the sustain pulses Sustain pulses are used to initialize and control the brightness of the panel Data Drive The LVDS receiver inside IC9500 of the D board converts the video signal to 10 bit RGB data the original format The output is provided to IC9900 IC9900 contains a format converter that changes the resolution of the signal to match the
3. Models Comparison 0747 078 057 057 057 057 LETS 152 0578 Pixel Pitch mm Display Capability 1080p 10801 720p Cinema Made with Pro Setting Viva HD3D Sound SD Memory Card slot SDHC Compatible 2 HDMI Input ee rp Sm S Video Input Mini D sub 15 Mini D sub Mini D sub 159 Mini D sub 15 Mini D sub 15 FC Input nin x 1 frear 15 pin x 1 pin x 1 rear pin x 1 rear pin x 1 rear Panasonic ideas for Models Comparison J TH SUPXTSU TH 42PX75U Number of Pixel 1049088 786432 1 049 088 1 049 088 785432 moer o 366 x 768 0024 x 768 1 366 x 768 1 366 x 024 x 768 0 81 SUR WEIN 0942x 081 087 Pixel Pitch mmm 0 942 mm Display Capability 1080p 10801 720p with rm Setting Sed aD Memory Card Slot SDHC Compatible HDMI Input der Composite Video 3 1 side 3 1 side as a E 8 Panasonic ideas for life High Resolution FULL HD Panel The Full HD plasma panel boasts a total of about 2 070 000 pixels 1920 x 1080 It renders true to life HD images with about twice the resolution of a standard HD panel HD PDP approx 1 050 000 pixels o o 1 EP PrN D DL I HET Sn EE 1 S Me HN
4. Picture menu Vivid SC Normal Set HUE s SC 105V 1V VR6600 Full 50 Caution 5 1 Perform the Vsus adjustment Vda TPVDA SS 75V iV 2V Fixed _ This should be done after the adjustment of Vad which should be 105 Mi Panel Label information When Vad 105V Vscn voltage is 35V 4V Serial No i na Vsus Note See the panel label for voltages MADE IN JAPAN NO j that are nol listed in the service manual 96 Panasonic ideas for life Initialization Pulse Adjustment 1 Input a 100 White signal to the unit 2 Set the picture controls as follows Picture menu Vivid Normal Set Aspect Full 3 Connect an Oscilloscope to test point TPSC1 Using VR6602 adjust T2 for 195 10u Sec T2 1905104 Ss 2 Panasonic ideas for life Quick adjustment after P C B exchange 1 Caution Wait 1 minute for the electrolytic capacitors to discharge before removing any PCB from the unit 2 Quick adjustment after P C B or Panel exchange P Board TPVSUS E GT P TE PEC Qo 396 OV 05V R443 660 SC SS ns TPVE I SN 55 3oard W Vhite bala nes r NTS gne 98 Panasonic ideas for life
5. 15 lace narr ONH 32 Panasonic ideas for life TV SUB ON F STB ON The F STB ON voltage 3 2 from pin 6 of connector P7 is applied to pin 23 of the Power CPU 1C501 on the P board 501 sends out commands to first turn on the primary circuit of the power supply and then the circuit that allows the F STB15V to develop 1 2 33 The relay commands high from pins 11 and 12 of IC501 are used to trigger the relays RL402 and RL403 A low from pin 16 of IC501 is used to turn on the power factor control IC IC406 to generate the 395V DC A high from pin 15 of 501 is used to turn on the V low power control IC 520 to turn on the oscillator in the Active Clamp Full Bridge System circuit A low from pin 18 of IC501 is used to turn on the F_STB15V DC DC converter Q556 Panasonic ideas for life TV SUB ON Relay Drive Circuit LINE FILTER RECTIFIER RL402 MAIN A amp B 300ms Ai BP 250V 8A NEUTRAL POWER MCU 34 Panasonic ideas for life TV SUB ON Relay Drive Circuit F STBY ON voltage 3 2V from pin 6 of connector P7 is applied to pin 23 of the power MCU 501 on the P board When pin 23 goes high pin 12 goes high turning on Q502 to trigger the inrush relay RL403 Approximately 300ms later pin 11 also goes high turning on Q501 to trigger the main relay RL402 300ms later pin 12 goes low allowing for only the main relay RL402 to r
6. 70 A 777 Panasonic ideas for life 66 O 7 2 lt e LC 2 c 19 2 MTO OIM io 0 19 OOO I 2 I 0 222 58 FICO COO 55 5058 deas for life BUFFER IG I Panason NE NAO dc 19 BUFFER PANEL DATA DRIVER 67 DATA 24bit DAG DC7 BUFFER DATA DRIVE LOWER LEFT FRONT VIEW 5 Blinks SOS 1 The 5V SOS be caused by a defective shift register located on a ribbon cable that connects the boards to the panel A shorted shift register typically shorts out both the Vda and 5V inputs To determine whether a shift register is shorted or not disconnect the connector SS23 and measure the resistance between pin 12 of the connector C23 and ground The normal resistance is approximately 110000 ohms If the panel is shorted the resistance to ground is very low If the panel is determined to be shorted the left and right side of the panel can be isolated by disconnecting the connector C20 C10 Furthermore the ribbon cables of the panel data electrodes can be disconnected one at a time until the short is no longer present 68 Panasonic ideas for life SOS Drive reset CLK 0 DOUTDAs DOUTDC15 CLK 1 CLK 2 CLK 3 TO 031 om DATA DRIVE LOWER RIGHT FRONT VIEW CLKD_3N CLKD_1N CLKD_2P VOC IC7101 Gua BUFFER Gua Vda75V PANEL DATA DRIVER 69 Pana
7. Audio Process Block Diagram 83 ACFB Active Clamp Full Bridge Switching Circuit 37 Self Check Function 88 mansus vargs m Howto Reseine nt _ DTV SUBEY SOS Deea ar on porten fa fe E Troubleshooting No Power Dead Unit Part 1 155 Internal Test Patterns 95 3 Panasonic ideas for life 21 25 28 30 32 34 36 37 39 3 51 53 55 Table of Contents Continued Driver Setup Adjustment ES Initialization Pulse Adjustment Quick adjustment after P C B exchange 98 E Panasonic ideas for life 2007 Panasonic Plasma Line up TH 65PZ750U TH 58PZ750U TH 50PZ750U 1080p HD High End Model TH 58PZ700U TH 58PX600U TH 50PZ700U TH 50PX600U TH 42PX600U TH 42PX60U _ TH 42PD60U TH 50PZ77U TH 42PX75U TH 50PE700U TH 50PE77U TH 42PE77U TH 50PX6U Derivative Model ETS TH 58PE75U TH 42PE7U HD High End Model HD Step Up Model ED Leader Model 5 Panasonic ideas for life Models Comparison PZ750 Series PZ700 Series PX77 Series PX75 Series Er mg 65 58 50 58 50 50 42 58 50 42 ee o me A EEE E TE Sub Pixel Controller El Se cone materai _ HEU m Spar Rp E ET RE En 0 Y SDHC Card Slot AVCHD MPEG2 JPEG JPEG JPEG JPEG 6 Panasonic ideas for life
8. POWER SUPPLY _ Poweron At Plug in fe 256 STB 15V L LLL Jin e Panasonic ideas for life Overall Block Diagram The operation of the plasma TV can be divided into 3 different sections 1 Power Supply Circuit The power supply circuit board P board provides voltages to the Signal switching processing circuit and the Panel drive circuit Signal Switching Processing Circuit Upon connecting the unit to the AC voltage source the STB5V of the P board is provided to the A board for system control operation The F_STB15V is also provided to the signal switching processing circuit of the A board It remains present for approximately 25 seconds unless the power button is pressed This circuit also receives 15V for audio operation and fan drive for models with fan Panel Drive Circuit The Panel drive circuit receives the Vsus Vda 15V and 5V sources from the P board when the unit is in operation 17 Panasonic ideas for life 18 Panasonic ideas for life Power Supply 20 Panasonic ideas for life Standby Circuit STBSV gt eo i 2 POWER SUPPLY RELAYS CLICK F STB ON STBSV sters 21 Panasonic ideas for life Standby Circuit 1 When the TV is connected to the AC line the power supply outputs 5V 2 This voltage is applied to the D board and the A board The 5V applied to the D board in the Panel Drive Section is not used during
9. SUB ON is output on pin 1 This command splits in 2 TUNER SUB ON and TV SUB ON The TUNER SUB ON command together with the STB5V is applied to the SOS detect circuit to monitor the sub voltages generated in the A board The TV SUB ON command is applied to the power supply board P board to create the F 15V 29 Panasonic ideas for life 508 50 ON TV SUB ON TUNER SUB ON Q3502 Q3503 STB5V R3518 N SOS D3507 D3502 OCP F 15V D3503 TUNER SUB ON E A7 5X 30 Panasonic ideas for life TV SUB ON TUNER SUB ON The STB 5V at pin 5 of connector A7 and the TV SUB ON command at pin 6 are used to activate the PA SOS detect circuit on the A board This circuit monitors the F 15V DT9V and SUBSV for abnormality Under normal operation the TUNER SUB ON voltage from pin 1 of the main CPU IC1101 turns on Q3504 When Q3504 is on a low is applied to the base of Q3502 turning it on When Q3502 is on 5V is applied to the emitter and base of Q3503 The transistor remains off until a short circuit or excessive voltage is developed in the supply lines connected to its base When 03503 is off a low is output to pin 114 of IC1100 31 Panasonic ideas for life TV SUB ON F STB 501 POWER MCU STBY P D5 ONH 1 MAIN RELAY H ON OFF 16 rol signal ONH ont 12 RUSH RELAY H ACFBcircuit to driv v Low ON OFF
10. and the power LED on the board 25 Panasonic ideas for life STBSV Circuit 7 5 STB5V R4166 E 05 9 9 04014 R4167 ak STANDBY This circuit combined with the circuit in the following page is used to explain the reason why the CPU 9003 on the board is not active during Standby The transistor 09014 is on to keep PANEL_STBY_ON low 26 Panasonic ideas for life A STBSV 3 STANDBY IC9011 STBY5V STB3 ON OFF The STB5V source is connected to the voltage input pin 4 of the RESET STB3 3V regulator IC9011 The output of this IC is controlled by the ON OFF pin Pin 6 The DC level of this pin is determined by the STB3 3V ON OFF circuit During standby pin 6 of IC9011 is low keeping IC9011 off When the power is turned on pin 6 goes high the IC turns on and outputs 3 3V on pin 3 27 Panasonic ideas for life Main CPU VCC Supply A Board STB5V Circuit A 5604 STB3 3V SOS DETECT CIRCUIT 28 Panasonic ideas for life Main CPU VCC Supply A Board On the A board the STB5V is applied to pins and 4 of the 3 3V regulator 5604 Pin 4 is the voltage input to the IC and pin 3 is the ON OFF command The STB5V at pin 3 allows pin 5 to output 3 3V The 3 3V from 5604 is then applied to pins 31 50 74 78 81 85 and 100 of the CPU IC1100 This turns on the main CPU 1100 and a high command SUB ON TUNER
11. da PEELE AT ET FJ B N 1366 4 NH y NI NN Y INN ANN i 1 DT About Twice the Resolution of a Standard HD PDP 9 Panasonic ideas for life 10 Panasonic ideas for life Board Layout 12 Panasonic ideas for life TH 42PX75U Boards Layout amp Description TH 42PX75U DC DC Converter r Speaker Out S D Sound Processor Power Supp y Sustain can Drive AV Terminal Dri AV Switch p ivi Digital Signal Processor Micon HDMI Interface Peak Lite 2 SS Sub Field BG Driver Lower Lower Rig EN EE Switch Lower Panasonic started using single scan addressing in the 42 HD models last year when the 9th generation of Plasma TV was introduced The single scan addressing was only used on standard definition models previously For this generation Panasonic has added the 50 models to the list of TV using single scan addressing Panasonic ideas for life TH 42PX75U Board M Pictorial ideas for life 2006 2007 Signal Process Switching Circuit 2007 The 2007 42 plasma models have less boards than the previous generation The PA DT DG H and HC boards used on the 2006 42 models are now incorporated within the new A board of the 2007 models 15 Panasonic ideas for life Overall Block Diagram Power on
12. 590 _ RST Sv D31 con 2 Panasonic ideas for life DRV RST SOS The DRV RST circuit of the D board is used to monitor the physical connection of the D board to the C board DRV RST input to IC9500 and IC9003 must be high for the unit to operate The D board provides the 5V source needed to power the boards On the C2 board the 5 is routed back to the D board via connector C20 C10 C11 D31 to activate the 5V SENSE circuit A voltage divider consisting of R9369 and R9371 develops a voltage drop that causes the collector of transistor Q9301 to become low As a result the base voltage of Q9302 also becomes low causing its collector to go high The output voltage is applied to 9500 and IC9003 as DVR RST When the 5V SENSE circuit does not detect 5V from the C2 board the DVR RST output becomes low The unit goes into shutdown and the power LED blinks 12 times When troubleshooting 5 blinks SOS isolating the C board and the panel may be necessary To avoid having the power LED blink 12 times after disconnecting either D31 C11 or D32 C21 test point TP9010 should be shorted to ground Test Point TP9200 is the ideal location to check for DRV RST 64 Panasonic ideas for life of 09302 ideas for life Close up View of Q9302 rest 4 9 eau w bd E et 22 J x gaat purk ate am aii gt 946 44 ye Ia a Ae PT cee
13. As a result the cathode of D2520A goes low causing the illumination of the power LED Panasonic ideas for life Power On 2 2 POWER ON A 1100 CPU PANEL STBY ON to 8 12 AM Genx STB VCC PANEL STBY ON PANEL ON Upon receiving the power on command the PANEL STB VCC ON pin of the main MPU IC1100 outputs 2 5V to the base of Q4015 turning it on Q4015 outputs a low to turn off Q4014 allowing pin 20 of the connector A5 D5 to go high I Panasonic ideas for life Power On 3 PANEL MAIN ON IC9011 z lt 2 PANEL STBY ON 100 20 Q9046 SY OFF STB3 3V ON OFF 48 Panasonic ideas for life Power On 3 The STBYSV from the power supply board is applied to pin 4 of the regulator IC9011 During Standby operation the regulator does not operate due pin 6 being low Upon receiving the power on command the PANEL STB ON high from pin 20 of connector D5 is applied to the base 09044 on the board turning it Q9044 outputs a low to turn off 09046 When pin 6 goes high IC9011 outputs the reset command at pin 1 and the STB3 3V at pin 3 The STB3 3V is applied to the VCC pins of the CPU IC9003 pins 24 39 61 63 68 and 88 The CPU then outputs a high 3 2V at pin 100 The 3 2V is directed to the power supply via pin 11 of connector D25 P25 49 Panasonic ideas for life Power On Summary IC501 VSUS L Control signal u
14. B5V R3518 605 7 03507 D3502 R3521 OCP F 15V R3523 SUB9V IA SUBSV OVP D3506 7 5 2 Panasonic ideas for life F 15V DIV9V SUBSV SOS Detect Circuit The F 15V DTV9V and SUB5V are monitored for over voltage and over current conditions by the SOS circuit on the A board Under normal condition pin 114 of the main CPU IC1100 is low When a short circuit or an over voltage condition occurs the SOS detect circuit is triggered causing pin 114 to go high When pin 114 goes high the TV shuts down and the power LED blinks 10 times When the F STB15V line is shorted the base of Q3503 goes low turning it on When Q3503 is on a high is applied to pin 114 IC1100 triggering the shutdown operation The same will happen if a short circuit develops in the DTV9V line and the SUBSV line The transistor Q3505 monitors the SUB5V and the DTV 9V lines If any of these supply voltages becomes excessive the inline zener diode D3505 or D3506 goes into conduction and turns on transistor Q3505 As a result a voltage drop appears at the base of Q3503 causing it to turn on and output a high to pin 114 of the MPU IC1100 The MPU shuts down the unit 42 Panasonic ideas for life Power On Operation Power on SUPPLY PANEL STB ON 43 Panasonic ideas for life Power On Operation The power command from the power switch on the S board or the remote control receiver o
15. ED may also be obtained from pin 3 of IC9003 the DRV RESET input The D board provides the 5V source needed to power the C boards On the C2 board the 5V is routed back to the D board via connector C20 C10 C11 D31 causing pin 3 of IC9003 to be high If 5V is not routed back to the D board pin 3 of IC9003 goes low The set goes into shutdown mode and the power LED emits 6 blinks 7 Blinks SOS Pin 93 of the MPU IC9003 monitors the status of the SC SU SD board During normal operation the photo coupler PC6480 outputs a low to pin 93 If the SC SU or SD board becomes defective a high is provided to pin 93 As a result the unit shuts down and the power LED blinks 7 times 8 Blinks SOS Pin 91 of the MPU IC9003 monitors the status of the SS board During normal operation pin 8 of connector 5523 outputs a low to pin 91 If the SS board becomes defective high is provided to pin 91 As a result the unit shuts down and the power LED blinks 8 times 10 Blinks SOS The SUB5V and DT9V sources created on the A board are monitored by IC 1100 If they are not present at pin 30 and 34 the MPU shuts down the unit The power LED blinks 10 times 10 Blinks SOS The F_STB_15V of the P board as well as the derived SUB5V and DT9V sources are monitored on the A board for excessive current If a short circuit is developed in one of the supplied lines pin 114 of IC1100 receives high The SUB5V and DT9V lines are also monitored for excessive voltage Wh
16. Panasonic Service and Technology Company National Training Panasonic ideas for life Panasonic Service and Technology Company Prepared by Cesar Perdomo and Jean Magloire Panasonic Service and Technology Company National Training Copyright O 2007 by Panasonic Services Company All rights reserved Unauthorized copying and distribution is a violation of law Warning This service information is designed for experienced repair technicians only and is not designed for use by the general public It does not contain warnings or cautions to advise non technical individuals of potential dangers in attempting to service a product Products powered by electricity should be serviced or repaired only by experienced professional technicians Any attempt to service or repair the product or products dealt with in this service information by anyone else could result in serious injury or death Panasonic ideas for life Table of Contents subject Pages Sublet 5 Troubleshooting No Power Dead Unit Part 2 z z Z CUTE e Standby Circuit 2 STB5V STB3 3V Distribution 2 12Blinks SOS 70 Main CPU VCC Supply A Board 28 Signal Circuit Overview 75 TV SUB ON TUNER SUB ON ENS Video Process Block Diagram 77 STB ON 32 4 4 Overall Block Diagram SOS Drive reset D amp C Boards Connection TV_SUB_ON F_STB_ON D Board Block Diagram 79 TV_SUB_ON Relay Drive Circuit Panel Drive TH 42PX75U 81 PFC Circuit
17. amp rr Peaks Lie ASW Digital demodulator 91 Panasonic ideas for life Serviceman Mode To enter the Serviceman Mode turn the TV on and while pressing the VOLUME button on the main unit press the RECALL button of the remote control three times within 3 seconds To exit the Serviceman Mode Press the Power button on the TV or the Remote Control 92 Panasonic ideas for life Serviceman Mode Menu and Navigation NOTE This is not part of the Menu Key command 1 button Main items Selection in forward direction 2 button Main items Selection in reverse direction 3 button Sub items Selection in forward direction 4 button Sub items Selection in reverse direction VOL button Value of sub items change in forward direction in reverse direction Panasonic ideas for Internal Test Patterns To access the internal patterns select AGING from the main adjustment menu and press the 3 or 4 button of the remote control to select the desired pattern To exit the Serviceman Mode Press the Power button on the TV or the Remote Control 95 Driver Setup Adjustment Driver Set up Remarks Name Test Point Jolt olume E Item Preparation Vsus TPVSUS Vsus 2V R628 1 Input a white signal to one of the SS unit s video input TPVE SS Ve 1V 6000 SS
18. e The P board Disconnect connector A1 If cable between connectors K1 and A1 is OK Replace the K board Do the AC relays click after Yes NO Yes the TV is plugged into the AC line Reconnect A1 and Disconnect connector A52 Do the AC relays click after he TV is plugged into the AC line Replace The A board If cable between connectors GS52 and A52 is OK Replace the GS board 56 Panasonic ideas for life Shutdown Circuits 58 Panasonic ideas for life SOS Circuit Overview P Board D Board 1C9003 4900 COMPARATOR DeL 0051 9052 Siimes 5 85 PSV Gtimes 6 DET imes SCAN_SOS 9905319054 ipee 8C Floating 2 87 DET T times 109807 4 us y 8 SOS 93 QREG23 86 per Micom 4 times 8 times 2 92 P5 505 805 505 91 11 100 Panel Main ON 12 times ALARM READY 3 y ns Sk gt Fil SV R7281 ic8001 legg tet era Peaks Lite2 SOS D 501 MAIN 22 13 24 TI JRELAY Vsus PS SOS TVMAIN ON OFF ON OFF DET DET 4 501 12 RELAY TV SUB ON OF ON OFF Power MCU F 06275 D6276 SS53A 1 2301 02301 Sound SOS 105605 if Q5021 HE Det Det sin 33 oc le F STB ON gt Bus 101100 d MES Main CPU 59 Panasonic ideas for life SOS Circuit Overview Protection circuits are incorporated in the u
19. e DC DC converter Q556 The output of Q556 is controlled by pin 4 Pin 18 goes low to turn off Q524 When Q524 is off 22V is applied to pin 4 of Q556 turning it on At this time pins 1 2 and 3 of Q556 output the F_STB15V The F_STB15V is applied to pins 7 8 and 9 of connector P6 38 Panasonic ideas for life MAIN SUB Voltages 3 34 DC DC IC3500 327 5600 SUB 5V SUB 9V o 1 2 1 8 DC DC SUB 5V TOO dpi SUB 5 IC5601 9 0 03500 CO ERROR DET TP3504 Le NOE 39 Panasonic ideas for life MAIN SUB Voltages The F 15V from the power supply is applied to pins 6 7 and 8 of connector A6 on the A board The 15V is applied to the voltage input pin pin 9 of the SUB 5V SUB 9V dual regulator IC3500 The 15V is also used to keep pin 1 and pin 15 high Pin 1 and pin 15 are the pins When pin 1 is high pin outputs 5V When pin 15 is high pin 13 outputs 9V 03500 monitors the 15V line for OVER VOLTAGE condition If the 15V becomes excessive 03500 conducts to turn 03500 When Q3500 is on pint and pin 15 go low to disable IC3500 The 9V from pin 13 of 3500 is applied to the 3 3V DC DC converter IC5600 to generate the SUB3 3V The 9V is also applied to the 1 2V 1 8V DC DC converter 15601 to generate the SUB1 2V and the SUB1 8V 40 Panasonic ideas for life F 15V DIV9V SUBSV SOS Detect Circuit TV SUB ON TUNER SUB ON Q3502 Q3503 ST
20. e serial data output is provided to the switch The HDMI receiver section of 4510 converts the incoming HDMI audio into serial data The Audio interface circuit selects between the two HDMI audio outputs the SD serial Data to the switch located inside 2106 Digital television reception of the tuner is output in the form of an IF Intermediate Frequency signal IC8302 contains a detector circuit that retrieves the transport stream from the IF signal The transport stream then enters The DTV I F Interface section of IC8001 where the audio signal is extracted and converted to serial data The output is provided to the switch located inside 2106 The output of the switch enters the Audio Process section of the IC Volume bass treble and balance adjustments of the audio signal are performed by this circuit The output is two channel PWM data that are applied to IC2301 for amplification The PWM output signals of the power amplifier are output to the right and left channel speakers for sound reproduction The Monitor output connection of IC3101 provides left and right channel audio output for connection to an external audio amplifier HDMI PCM Pulse Code Modulation Audio and DTV AC3 audio are connected to the optical audio output jack via a switch located inside 2106 94 Panasonic ideas for life 85 Panasonic ideas for life Adjustments 87 Panasonic ideas for life Self Check Function 1 Checks the commu
21. emain on RL401 is triggered whenever RL402 or RL403 are triggered AC voltage flows through the relays contact the line filter and the bridge rectifier D401 for conversion into DC 35 Panasonic ideas for life PFC Circuit AC Fa D401 DC395V FROM RELAYS R450 L403 yoy E D444 A424 A424 NI Q401 Pin 16 of IC501 also goes low when pin 23 is high When pin 16 goes low the diode within the photo coupler 401 emits light to turn on the photo transistor Pin 4 of IC401 goes low This low is applied to the gate of Q401 turning it on to apply 12V to pin 8 of PFC circuit 36 Panasonic ideas for life ACFB Active Clamp Full Bridge Switching Circuit PR401 5A 250V 395VDC Vlow Power Control Q408 Q409 0412 0413 501 POWER MCU LOW ON OFF F STB 15 STE H ON OFF Gh O 37 Panasonic ideas for life ACFB Active Clamp Full Bridge Switching Circuit The 395VDC is applied to the switching circuit 0408 0409 0412 and 0413 The operation of this switching circuit is controlled by the transformer T402 which is driven by the V low power control IC IC520 1 A high from pin 15 of 501 is used to turn on the power control IC 520 to energize the primary of transformer T402 and allow the switching circuit to drive transformer T404 The secondary circuit of transformer T404 outputs the Vsus Vda and 15V voltage sources The 15V is applied to th
22. en an over voltage condition is detected a high is also output to pin 114 of IC1100 The DT9V is provided to DC DC converter to create the BT30V for the tuner If the BT30V becomes excessive a high is output to pin 114 of IC 1100 A high at pin 114 of 1100 causes the unit to shutdown and the power LED to blink 10 times 61 Panasonic ideas for life SOS Circuit Overview 10 Blinks SOS 5600 is 3 3V regulator located on the A board Its output is monitored by IC1100 If the 3 3V is not present at pin 67 the MPU shuts down the unit The power LED blinks 10 times 12 Blinks SOS On the A board transistor Q2301 monitors the Sound 15V line and the operation of the audio power amplifier IC2301 If the audio output circuit IC2301 or the 15V lines develops a short to ground transistor Q2301 goes into conduction and applies a high to pin 118 of the MPU IC1100 triggering a SOS condition The power LED blinks 12 times 12 Blinks SOS We have also discovered that 12 blinks of the power LED may also be caused by a defective SS board To determine the source of the shutdown disconnect the connector D5 and connect the unit to the AC source If the panel turns on and the LEDs of the SS and SC boards stay on the problem is on the A board If the panel does not stay on the problem is likely to be the SS board 62 Panasonic ideas for life DRV RST SOS DRV RST TP9010 09301 wer EX DRV RST FE Ic9500 1 SV 169
23. er are all are connected to IC3001 for selection The video output signal of the switch can be in any of the three formats Video Y G or Y Pb Pr The selected output enters 4510 the HDMI IF Receiver Decoder IC for A D conversion The comb filter inside 184510 converts the composite video signal of the main picture to Y and C luminance and chrominance signals S Video which is already Y C separated simply passes through the comb filter The chrominance data is then applied to the Chroma Demodulator circuit to separate the color signal into Pb and Pr data At the completion of this process the format of the composite or S Video signal is now the same as a digital 480i component signal If the incoming video is in the 480 720P or 1080i format the Y Pb and Pr signals undergo A D analog to digital conversion only The 10 bit YUV data is provided to a video switch The HDMI receiver section of 4510 converts the incoming HDMI signals to a YUV video signal The Video interface circuit selects between the two HDMI sources and outputs the YUV signal to the switch The output of the switch is provided to another switch located inside the PEAKS LITE 8001 Digital television reception of the tuner is output in the form of an IF Intermediate Frequency signal IC8302 contains a detector circuit that retrieves the Transport stream from the IF signal The transport stream then enters the DTV I F Interface section of IC8001 where the v
24. ideo signal is extracted and converted to YUV data The output is provided to the Video Input I F for selection The JPEG data of the SD card enters the JPEG I F section of IC8001 for conversion into YUV data and output to the Video Input I F circuit The video input interface outputs the selected picture data to the video process circuit This Video Process section of the IC performs all picture control operations such as brightness contrast color tint etc On Screen Display data such as channel numbers Digital TV closed caption and picture adjustments are mixed with the video data The output signal is then applied to the LVDS Low Voltage Differential Signaling transmitter for conversion into serial data The LVDS transmitter transfers the video information from the A board to the D board It distributes signals with low jitter while creating little noise It reduces power consumption and the generated noise from data transmission Another benefit of the LVDS standard is minimal concern for cable length The main MCU handles all video applications It serves as the controller that monitors all operations of the TV section not display of the unit When watching digital television or viewing pictures from an SD card the digital YUV output of the Video Input Interface is converted into analog composite video signal for output at the monitor out jack 78 Panasonic ideas for life D Board Block Diagram 1 9500 EITT PLASMA Al DATA ile PICTURE
25. ignal is then applied to the D board The D board is responsible for displaying the picture It provides the scan sustain and data drive signals to address the panel The scan pulses are output to the SC board The sustain pulses are output to the SS board The data drive signals are output to the C1 and C2 boards The C1 board drives the right half of the panel the C2 board drives the left half of the panel The SC board is responsible for the generation of the scan pulses Scan pulses are used for initialization and selection of the pixels The SU and SD boards are de multiplexer boards that are responsible for converting serial data output of the SC board into parallel data to drive the panel The SS board is responsible for the generation of the sustain pulses Sustain pulses are used to initialize and control the brightness of the screen The SS2 and SS3 boards are extension connector boards used to connect the SS board to the panel 76 Panasonic ideas for life Video Process Block Diagram 1C4510 HDMI LF RECEIVER VIDEO INPUT VIDEO LYDS LF PROCESS XMITTER RGB MIX DTV IF AD RXCLK RXCLK RX2 EX RX1 CHODATA RXD Panasonic ideas for life Video Process Block Diagram The main function of the A board is to select and process one of the incoming video signals Video inputs 1 and 2 Component Video Inputs 1 and 2 and the composite video output of the tun
26. ion As a result the base voltage of Q2301 becomes low and a high is output to the MPU to trigger an SOS condition 72 Panasonic ideas for life Signal Processing 74 Panasonic ideas for life Signal Circuit Overview 75 Panasonic ideas for life Signal Circuit Overview The is the Remote Receiver and Power LED board Commands that originate from the remote control or keypad of the GS board are received and processed by the system control circuit located on the A board The A board contains an Optical Audio Out jack for use with a Dolby Digital decoder and a multi channel audio amplifier When a digital channel is selected the output from the Digital Audio Out jack is Dolby Digital The same jack outputs PCM Pulse Code Modulation when any other signal source is selected NTSC ATSC and QAM television reception is performed by the A board The unit also contains two video inputs two HDMI inputs and two component inputs that are directly connected to the A board The A board selects the video signal for display on the screen It is responsible for converting all inputs into YUV data for video processing The A board performs PIP Picture in Picture and picture control operations such as brightness contrast color tint etc The PEAKS firmware of the unit also resides in this board The RGB output of the A board passes through an LVDS Low Voltage Differential Signaling transmitter for conversion into serial data The output s
27. n SS board The SC board is responsible for the generation of the scan pulses Scan pulses are used for initialization and selection of the pixels The SU and SD boards are de multiplexer boards that are responsible for converting the serial data output of the SC board into parallel data to drive the panel Each board drives one half of the panel horizontally The SS board is responsible for the generation of the sustain pulses Sustain pulses are used to initialize and control the brightness of the panel Data Drive IC9900 memorizes the 10 bit data into two field data to drive the left and right side of the panel IC9900 subsequently converts the picture data into the 10 11 or 12 subfields data to feed the data electrodes of the panel The data drive signal of IC9900 is output to the C boards The C boards are buffer boards that are used to distribute data to the shift registers of the panel 82 Panasonic ideas for life Audio Process Block Diagram 4510 HDMI IF RECEIVER IC2106 SOUND PROCESSOR SPDIF 4 FRONT END PROCESSOR 83 Panasonic ideas for life Audio Process Block Diagram IC3101 of the A board handles the audio selection of most inputs Analog Audio signals from composite component and DVI inputs are connected to IC3101 for selection The analog audio of the tuner is also provided to IC3101 for selection The output of IC3101 enters IC2106 and undergoes analog to digital conversion Th
28. n the K board is provided to the CPU in the A board The CPU on the A board outputs the PANEL STB ON command and the F STB ON command The PANEL STB ON is provided to the D board to turn on the STB3 3V regulator The output voltage is applied to the CPU in the D board The STB ON command is provided to the power supply to develop the STB 15V When the CPU on the D board is energized it outputs the PANEL MAIN ON command to the power supply This command turns on the power supply circuit that outputs the Vsus Vda 15V and 5V 44 Panasonic ideas for life Power On 1 STB3 3V O esca es 4 SW3754 SW3758 SW3757 SW3756 SW3755 IC5604 3 3V Reg 101100 Key Main Micon Genx4 R LED Key3 RM In ON SW2500 RM2501 REMOTE RECEIVER D2520A POWER LED Modem LED KEY3 Q2511 3 Active STB LED 45 Panasonic ideas for life 46 Power On 1 When the unit is turned on using the power button on the front of the TV the momentary connection of the power switch to ground supplies a low to the base of Q5604 DG board to turn it on Q5604 outputs a low to the key input line pin 18 of the CPU IC1100 on the A board The R C receiver receives the power on command of the remote control and outputs the IR data to the amplifier 02510 of the A board The data is amplified and output to pin 45 of the MPU 1100 A high from pin 49 of 1C 1100 enters the base of 02511 to turn it on
29. nication bus lines 2 Provides a SOS History To Access the Self Check Mode turn the TV on and while pressing VOLUME button on the main unit press the OK button on the remote control for more than 3 seconds TV volume down amp on remote only does a basic self check It does restore the unit to factory shipping settings It does not clear channel programmed settings picture settings channel labels LOCK mode settings or password Using this method it shows the unit s firmware version Peaks 1 050 and GenX 1 00 and it checks communications ONLY This is more useful to identify the firmware version without having to decode the info in the setup menu About Version screen To Exit the Self Check Mode Press and hold the Power button on the TV for 5 seconds or disconnect the AC cord from the wall outlet 88 Panasonic ideas for life How to Reset the Unit Note All customer programmed parameters will be erased To Reset the Unit turn the TV on and while pressing the VOLUME button on the main unit press the Menu button on the remote control for more than 3 seconds The Self Check menu appears on screen Then disconnect the cord from the wall outlet 89 Panasonic ideas for life Crni uL h A A p y EIT GNECK Jal xy h A LAL AA UA VU SELF CHECK Check point ef No Description
30. nit to prevent the failure of a single circuit or component from creating catastrophic damage 1 Blink SOS This shutdown operation is usually caused by a lack of communication between the A and the D boards 1 Blink SOS This shutdown operation may be caused by the improper connection of a SS board connector to the panel 2 Blinks SOS Pin 87 of the MPU IC9003 monitors the 15V line During normal operation the transistors Q9053 and Q9054 output a high to pin 87 If the 15V line is missing or shorted a low is provided to pin 87 As a result the unit shuts down and the power LED blinks 2 times 3 Blinks SOS 9807 is a 3 3V regulator located on the board Its output is monitored by IC9003 If the 3 3V is not present at pin 86 the MPU shuts down the unit The power LED blinks 3 times 5 Blinks SOS Pin 85 of the MPU IC9003 monitors the 5V line During normal operation the transistors Q9051 and Q9052 output a high to pin 85 If the 5V line is missing or shorted a low is provided to pin 85 As a result the unit shuts down and the power LED blinks 5 times 6 Blinks SOS Pin 90 of the MPU IC9003 monitors the status of the SC board During normal operation the transistor Q6581 and 6581 output a low to pin 90 If the SC board becomes defective a high is provided to pin 90 As a result the unit shuts down and the power LED blinks 6 times 60 Panasonic ideas for life SOS Circuit Overview 6 Blinks SOS 6 blinks of the power L
31. o the Power MCU 501 located on the Power Supply board Subsequently the power MCU outputs the following commands 1 Relays ON OFF To turn on the circuit that activates on the AC relays The PFC Power Factor Control circuit goes into operation to create the DC voltage needed to power the circuit 2 VLOW ON OFF turn on the ACFB Active Clamp Full Bridge circuit to generate the 15V 3 F STB ON OFF to provide the command to turn on the DC DC converter to output the F 15V The F 15V is applied to the 5V 9V regulator IC3500 on the A board The voltage outputs of IC3500 used by various circuits on the A board To avoid catastrophic failures they are monitored by an SOS Detect circuit for over voltage and over current conditions This SOS Detect circuit is controlled by the TUNER SUB ON command from the Main CPU 100 The 9V from IC3500 is also applied to a 3 3V regulator 5600 The and 9V from IC3500 and the 3 3V from 5600 are connected to the CPU for voltage presence detection 24 Panasonic ideas for life STBSV STB3 3V Distribution STB5V IC901 1 Circuit 4 A18 STBSV IC5604 FOR FACTORY The STB5V is connected to the D and A boards During standby this voltage is not used by the D board On the board the STB5V is applied to a 3 3V regulator 15604 to generate the STB3 3V to power the MAIN MICON Genx4 161100 The STB3 3V is also connected to the remote receiver IC
32. sed to turn POWER MCU ON OFF pecs 502 RESET AC_DET FSTBH PANEL MAIN ON 24 15V ON OFF NIC AS D 11 MAIN RELAY H Used to trigger the relays RL401 RL402 V LOW ON OFF 15 RL403 ON L ON OFF 16 2 RUSH RELAY H LOW15V_ON OFF on the VSUS and the Vda When turning the TV On P7 F STBY ON D512 p2 Main Panel ON TAE R547 Control signal used to turn ON L on the F_STB15V DC DC Converter Q556 ON H Control signal used to turn on the oscillator in the ACFBoircuit to drive T404 ON H Control signal used to turn Control signal used to turn on The PFC circuit on the 15 converter Q555 When the power is turned on the PANEL MAIN ON command and the F STB ON command are applied to the power MCU 501 The complete standby operation is repeated when the STB ON command from the A board is applied to pin 23 When the 3 2V PANEL MAIN ON command from the D board is applied to pin 24 of IC501 pin 10 goes high and pin 14 goes low The high from pin 10 turns on the 15V DC DC converter Q555 to output the P15V When pin 14 goes low the Vsus switching circuit is turned on to allow for Vsus and Vda to be output 50 Panasonic ideas for life P15V P5V Circuit Vlow Power Control Q408 Q409 Q412 0413 Ni Ev 70 y Q555 D gt D DC DC Conv 15V XS ION 79
33. size of the panel It also contains the Plasma Al Adaptive brightness Intensifier circuits that analyzes the for the distribution of dark and bright components 9900 subsequently converts the picture data into the 10 11 or 12 subfields data to feed the two C boards The C boards are buffer boards that are used to distribute data to the shift registers of the panel The level converter ICs are level shifters that changes the voltage level of the data from 3 3V to 5V IC9200 is a clock generator IC9303 is a non volatile memory chip that contains parameters for driving the panel IC9901 is a memory chip that is used for sub field conversion 80 Panasonic ideas for life Panel Drive TH 42PX75U D Processor 1 E SCAN SUSTAIN ELECTRODE i ELECTRODE 768Line 42 HD i 768Line 42 HD lt Back side view gt Lia DATA ELECTRODE Voltage 1024Line R G B 42 HD Reg lt SU Board gt lt SD Board gt lt C Board gt 6901 6906 SHIFT REGISTER UPPER 6951 6956 SHIFT REGISTER LOWER IC7XXXX BUFFER 81 Panasonic ideas for life Panel Drive TH 42PX75U Discharge Control IC9500 of the D board contains the Discharge Control circuit that analyzes the RGB and sync information of the video signal to create the Scan data to drive the Scan operation SC board and Sustain data to drive the Sustain operatio
34. sonic ideas for life M I Ln PET me more sore ee 7 sr The improper connection of the connectors C1 1 4 C21 C10 and C20 causes aDVR_RST SOS The power LED blinks 6 times leading one to believe that there is a problem in the audio output circuit C C A CE bet Caution 1 The ribbon cable C10 C20 must be transferred during a panel exchange 2 The improper installation of the connectors C11 and C21 may cause vertical lines to appear in the picture 10 Panasonic ideas for life 12 Blinks SOS IC1100 18 MAIN CPU Genx4 D2303 D2304 2106 SOUND PROCESSOR 71 Panasonic ideas for life 12 Blinks SOS 1 Sound processing and adjustments are performed by IC2106 The two channel PWM audio output of the IC is applied to the audio power amplifier IC2301 The PWM signals of the power amplifiers are output to the right and left channel speakers for sound reproduction 2 102303 converts the 15V source to 12V for connection to the audio power amplifiers 3 The diode D2303 and transistor Q2301 monitor pin 5 of the power amplifiers for excessive current drain If a short circuit develops transistor Q2301 goes into conduction and outputs a high to pin 118 of the MPU IC1100 triggering an SOS condition 4 Ashortcircuit of the 15V line causes the diode D2301 to go into conduct
35. standby operation the other hand when the A board receives the 5V from the Power supply it outputs the F STB command 4 This command is applied to the power supply board to generate the F_STB15V The F_STB15V is applied to the A board to energize the Signal SW Process Circuit 22 Panasonic ideas for life Standby Circuit Standby Power Circuit AE MA A PS E 1 101100 Micom sv OV DET DET DET PFC ACFB Circuit Circuit 23 Panasonic ideas for life Standby Circuit When is applied to the TV the Standby circuit outputs 5 and 12Vdc The 5 is applied to the Power MCU and the switching transistor Q537 of the power supply circuit The 12V is provided to the SS board A jumper at connector SS34 of the SS board routes the 12V back into the power supply board to turn on Q537 When Q537 is on the STB5V is output to the D and A boards On the D board the STB5V is applied to 3 3V regulator 109011 During standby operation this regulator is kept off to disable the panel drive circuits The STB5V is also applied to 3 3V regulator 5604 on the A board to provide the supply voltage STB3 3V to the Main CPU 161100 The STB3 3V is also applied the Remote Control receiver and the power LED on the K board Furthermore the STB3 3V is provided to the SD card slot Not shown in the diagram When the Main CPU IC1100 receives the 3 3V it outputs the TV SUB ON TUNER SUB ON command t
36. within the photo coupler 507 The light from the LED turns on the phototransistor within the photo coupler and its collector pin 4 goes low to turn off Q540 When Q540 is off the DC voltage from the rectifier D586 is applied to the gate of Q507 turning it on Q507 outputs the VSUS voltage The VSUS voltage is also used to turn on Q527 to output the VDA 54 Panasonic ideas for life Troubleshooting No Power Dead Unit Part 1 NO Do the AC relays Yes click after the TV is plugged into the AC line Is there 5V at pin 5 of connector A7 when the TV is plugged into the AC line NO Yes Is there 2 5V at pin 20 of connector D5 when the power button is pressed Yes NO pin 5 of connecto A1 momentarily go from 4 5V to OV when the power button is pressed NO Yes Unplug the TV Yes Disconnect connector A7 Does the TV turn on by itself with no picture and lit LEDs on the SS amp SC boards when it is plugged into the AC Replace The A board Check connections and the S amp K boards Is there 3 2V at Yes pin 11 of connector P25 when the power button is pressed Replace Replace The P board The D board Panasonic ideas for life NO Replace The A board Replace The P board 55 Troubleshooting No Power Dead Unit Part 2 Is NO there 3 3V at Yes pin 6 of connector P7 when the TV is plugged into the AC line Replac

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