Panasonic TH-50PHD5 Troubleshooting Manual Download Page 9

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•Simple and low cost circuit

•High performance
•Higher brightness

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Summary of Contents for TH-50PHD5

Page 1: ...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...

Page 2: ...mponent Video Input mode Sync 21 D1 Board 22 D1 Main ICs Operation 22 D2 Board 23 D2 Board details 24 SC Board Explanation 25 SS Board Explanation 28 Power Supplies 31 Standby Power Supply 31 Main Power Supply 32 Power Factor Control 32 Low Voltage Power supply 33 Voltage Regulation 33 High Voltage Power Supply 34 Protection Circuits 36 Diagnostic Procedures 38 Self Check Display Indication 38 Pow...

Page 3: ...69 P BOARD CONNECTORS 69 HX BOARD CONNECTORS 73 HY HZ BOARD CONNECTORS 74 Adjustment Procedures 75 Panel label Information 75 B Set up 76 Confirmation 76 Driver Set up 77 Initialization Pulse Adjust 78 P C B Printed Circuit Board exchange procedure 79 Adjustment Volume Locations 79 Test Point locations 80 Serviceman mode 81 CAT computer aided test Mode 81 I2 C Mode 81 CD mode 82 SD Mode 83 I2 C Me...

Page 4: ...h charts and connector information should provide enough detail that the technician can accurately determine which one of the printed circuit boards is required to repair the product Alignment and adjustment procedures are also included in this document The Block diagrams and the schematic drawings reference the model TH 42PHD5 but the technology is consistent with any GPH5D chassis ...

Page 5: ...eality Advanced 3 dimensional Progressive Scan 1366 x 768 XGA Resolution UXGA Compatible TH 42PHW5 42 inch 106cm TH 42PW5 42 inch 106 cm Wide Plasma Display Plasma Contrast Automatic Tracking System C A T S 3 Dimensional Progressive Scan VGA Resolution UXGA Compatible TH 37PW5 37 inch 94cm ...

Page 6: ...s 1 280 x 768 0 98 million pixels Pixel pitch 0 810 H x 0 810 V 0 656 0 858 H x 0 808 V 0 693 N A 42 43 inch 42 Screen size 1 024 x 768 0 79 million pixels 43 Screen size 1 024 x 768 0 79 million pixels 1 024 x 5120 52 million pixels Pixel pitch 0 898 H x 0 674 V 0 605 0 930 H x 0 698 V 0 649 0 90 H x 1 02 V 0 918 2 0 459 1frame Relationship between Picture resolution and Scanning method 768p 720p...

Page 7: ...024 pixels 768 pixels 790 000 pixels SD Standard Definition Panel HD High Definition panel Reproduces even the tiniest details of high definition sources and other high quality images Provides the optimum number of pixels for viewing standard broadcasts and DVD Figure 1 ...

Page 8: ...is a system developed from the 3 electrode discharging system The ALIS method uses an interlaced driving scheme which means the even and odd lines are addressed alternately New Asymmetrical Cell Structure Panel Figure 3 shows the unique asymmetrical cell structure that achieves both high brightness and crisp whites The asymmetrical arrangement of the red blue and green cells that control color rep...

Page 9: ...10 D Du ua al l S Sc ca an n H HD D S Si in ng gl le e S Sc ca an n S SD D Simple and low cost circuit High performance Higher brightness Figure 5 Figure 4 ...

Page 10: ...ar Cover Removal Remove the 27 screws shown in Figure 6 and then pull away the rear cover Removal of the shield Remove the six screws shown in Figure 7 and then pull away the rear shield cover Figure 8 Figure 7 Figure 6 ...

Page 11: ...10 11 12 13 14 15 16 17 18 Z6 è P6 Œ Z10 è D10 Œ Œ Z17è D17 Œ D12 èD22 D16 è D26 D25 è P5 Œ Œ Œ Œ D27 è P7 Œ Œ Œ Œ SC2 è P2 Œ Ž Œ Œ Œ Œ Œ SC4 è P4 Œ Ž Œ Œ Œ Œ Œ SC20 è D20 Œ SC21è D21 Œ H37è Z3 Œ Œ Œ Œ Œ Œ H37 èZ4 Œ Œ Œ Œ Œ Œ Œ Œ Œ Œ SS1 èP1 SS3 èP3 Œ SS32 èC32 SS42 èC42 Œ ESC POWERè SS34 Œ ESC V BOARDè C44 Œ F9 è P9 Fan 1 è P10 Œ Ž Œ Fan 2 è P11 Œ Fan 3 è P12 Œ Œ Fan 4 è P13 Œ Œ Œ Œ Wind the cabl...

Page 12: ...rminal HX TZTNP01LLSU PC type Input terminal HZ TXNHZ40JJS RCA type Input terminal P TXN P10LLS Power supply P3 TNPA2439 Drive voltage oscillator P5 TNPA2440 Primary oscillator P6 TNPA2441 PFC oscillator P7 TNPA2442 Drive voltage protection P8 TNPA2443 Process voltage protection S1 TNPA2283AC Power switch SC TNPA2434 Scan out SD TNPA2433 Scan connection Lower SS TNPA2435 Sustain out SS2 TNPA2436 S...

Page 13: ...ine filter H3 TNPA2249 Speaker Terminal HX TZTNP02KESE PC type Input terminal HZ TXNHZ40JJS RCA type Input terminal P1 TXNP110MHS Power supply P3 TNPA2566 Drive voltage oscillator P5 TNPA2567 Primary oscillator P6 TNPA2568 PFC oscillator P7 TNPA2569 Drive voltage protection P8 TNPA2570 Process voltage protection S1 TNPA2283AC Power switch SC TNPA2434AB Scan out SD TNPA2518 Scan connection Lower SS...

Page 14: ...ne filter H3 TNPA2249 Speaker terminal HX TZTNP020JAS PC type Input terminal HZ TXNHZ40JJS RCA type Input terminal P TNPA2598 Power supply S1 TNPA2622 Power switch SC TNPA2534 Scan out SD TNPA2584 Scan Connection Lower SS TNPA2535 Sustain Out SS2 TNPA2536 Sustain Connection Upper SS3 TNPA2537 Sustain Connection Lower SU TNPA2583 Scan Connection Upper V1 TNPA2621 Front SW Remote Receiver Z TNPA2590...

Page 15: ...ter signal selection the composite or S Video signals are amplified buffered and applied to a 3D comb filter inside IC3803 The 3D Comb filter converts the Composite input signals to Y Pb and Pr component signals The output of IC3804 is applied to the D1 Board via pins 1 3 and 5 of the connector H2 D2 Individual amplifiers buffered the Component input signals that are then applied to the D1 Board v...

Page 16: ... of transistor amplifiers The RS232C communications bus line is also connected on this board The RS 232C connection is provided so that operation changes can be made via PC An example of an application of this port would be remote turn on of the unit for a kiosk or similar display The outputs of the HX board are applied to the D1 board via connector HX1 D3 ...

Page 17: ...ptional Digital Visual Interface DVI input bypasses the A D process as DVI information is already in the digital format Concurrently the desired sync signals are selected and applied to the Sync Processor NTSC and Component sync signals are stripped from the Green video component while the PC sync is applied directly The Sync Processor combines the On Screen Display Sync signal with the input sync...

Page 18: ... Panels The DVI interface allows direct digital transfer from a display device to the panel A VGA or component video signal requires a conversion from the digital to analog and then conversion back to digital prior to input to the Format converter see Figure 17 The double conversion can introduce distortion to the signal Figure 17 ...

Page 19: ...connection of the digital video signal to the Format converter This bypasses the D A and A D process providing the better quality picture Installation of the DVI interface requires removal of the HY HZ Board and replacing it with an optional DVI interface board Figure 18 ...

Page 20: ...ocessor IC9451 IC9451 mixes the image sync signal with the OSD sync signal prior to output to the format converter IC9200 Composite Component Video Input mode Sync The video signals are applied to an input switch IC3001 The output signal is separated into Y Pb and Pr with Sync on green signal The Sync on green signal is applied to a sync separator IC8001 IC8001 outputs the Vertical and Horizontal ...

Page 21: ...tch The user selects the desired video input using the front panel button or the remote control The microprocessor reads this data and sends out a command via the IIC bus line The IIC data is read by IC3001 and the video input is chosen IC9007 A D Converter This integrated circuit converts the RGB analog signals to eight bit parallel data IC9200 Format Converter The digital video data is converted...

Page 22: ...to the SC board The sustain pulses are output to the SS board The data drive signals are output to the C1 C2 C3 and C4 boards The C1 board drives the Upper right portion of the panel the C2 board drives the upper left portion The C3 and C4 boards drive the lower right and left portions of the panel respectively ...

Page 23: ...r eight bit video signals are memorized into two Plasma AI processors IC9651 and IC9601 The Plasma AI circuits converts the 8 bit signal data to 10 bit signal data The Flash memories contain the algorithms for the AI circuit Two AI processors are used to speed up the scanning process and control the number of sustain periods This increases the brightness and improves the contrast ratio ...

Page 24: ...25 SC Board Explanation Figure 23 ...

Page 25: ... SC20 provides the drive signals 140V 100V and 18V Connector SC21 provides trigger signals to switch the FET transistors The D2 board switches the FETs on and off to create the distinctive scan signal Each trigger signal switches a drive FET creating a portion of the waveform For example applying the CPH signal to the 140V FET creates the peak portion of the waveform see figure 23 ...

Page 26: ...rd it is applied to the SU and SD boards for de multiplexing The signal is input to a series of shift registers inside the PDP scan driver IC Figure 25 shows an example of the de multiplexing circuit There are six driver ICs on the SU board and six on the SD board ...

Page 27: ...s are output to the SS board The erase pulse is output at the beginning of each scan period The pulse is applied to the SS2 and SS3 boards to remove the previous charge for the upper and lower sections of the display panel The sustain pulses are also developed on the D2 board and are applied after the scan periods ...

Page 28: ...29 Figure 27 Figure 28 ...

Page 29: ...ulses are applied to FET drivers creating the distinctive sustain pulse The drivers switch the voltages 150V 155V and 175V at selected intervals determined by the D2 board The basic waveform remains constant but the exact number of sustain pulses is determined by the amount of luminance required see figure 28 ...

Page 30: ... applied to the primary side of transformer T402 Diode D439 rectifies the AC output at pin 15 of the secondary of T402 to create STB Standby voltage for the system control circuit The AC output at pin 14 of the secondary of T402 is rectified by diode D440 to create the DC voltage for the power relays Transistor Q418 creates the ground path for power relay RL401 Transistor Q417 provides the ground ...

Page 31: ...ge drop enters pin 5 of connector P19 P19A of the power factor control circuit board The power factor control circuit board is a switching control oscillator circuit which boosts the input voltage at pin 2 of the transformer T401 to 400Vdc As the pulses are output at pin 4 of connector P19 P19A the transistors Q400 Q405 are switched On Off controlling the charge and discharge time of the inductor ...

Page 32: ...pin 10 of transformer T401 is applied to IC401 where it is regulated to 18V This voltage is used to power the Drive Oscillator circuit board that will be discussed later Voltage Regulation The 13 5V source and the VDA source voltage levels are monitored by IC650 of the P5 Board A voltage increase of the 13 5V or an increase in the current flow of the VDA source causes IC416 to conduct harder allow...

Page 33: ...quare wave outputs at opposite polarity The two signals are then output to the P1 board as H OUT at pin 1 and L OUT at pin 6 of connector P15 Amplification of the two signals is performed the transistors Q407 Q408 Q409 Q410 before being applied to the transformer T400 The output of the transformer is provided to the SC Board via pin 1 and 2 of the connector P2 and to the SS board via Pins 2 and 3 ...

Page 34: ...ed to the system control circuit via pin 13 of connector P15 for immediate shutdown of the entire unit The P7 High Voltage Protector and P8 Low Voltage Protector circuit boards monitor the DC output of all power supply boards If any of the inputs is higher than the desired level a DC level is output via the SOS IN line to pin 1 of connector P16 The operation is the same as the OVP input at pin 6 o...

Page 35: ...ggering Q751 Q751 triggers Q750 on applying a high to pin 95 of the main CPU IC9351 The circuitry on the P8 board monitors the plus and minus 13 5V lines used by the audio circuit the 5V line and another 13 5V line If any of these supplies were to drop the comparator will output a low signal turning on Q776 Q776 conducts applying a high to pin 95 of the main CPU IC9351 The four ventilation fans ar...

Page 36: ...omparator goes high Q6741 turns on effectively grounding the SOS line The SC board uses a similar circuit to monitor the 17V line The SS and SC boards contain an LED indicator to alert the technician when a problem exists The LED should be lit during normal operation a dark LED indicates that a problem exists on that board ...

Page 37: ...controlled circuits of the Plasma display To get into the Self check mode press and hold the Volume Down button on the front of the unit then the OFF TIMER button on the remote control The graphic in figure 32 should be displayed Note In case the H HY or HZ boards are disconnected IC3699 is displayed Figure 33 ...

Page 38: ... timing chart When an abnormality has occurred in the unit the protection circuit operates and shuts off the power supply The faulty area can be identified by the number of flashes of the Power LED at the front of the unit ...

Page 39: ...ht up 2 The power LED is green at power up It then turns red a few seconds later and blinks on and off 3 The power LED is red at power up and never changes state No Check the P Board Replace the defective component Yes Does the power LED turn on No Do F900 and F901 measure correctly The F Board is suspected to be defective Yes ...

Page 40: ...ply voltages is missing the red LED blinks on and off Remove Connector P5 No Is the LED still blinking red Check D1 Board Check SS SC Boards Yes Blinking stops But still no picture Check the output of the P Board No Remove Connector P1 P2 Is the Power LED still blinking red Yes ...

Page 41: ...EDs lit The SS board is suspected to be defective Is the SC board LED lit The SC board is suspected to be defective Is the Vda voltage correct The Power supply is suspected to be defective The D1 is suspected to be defective NO NO NO YES YES YES ...

Page 42: ...luminated SC Board is probably defective SS Board is probably defective D1 or D2 Board is probably defective Does the problem exist on all inputs Does the problem exist on Composite video Does the problem exist on PC RGB video HZ Board is probably defective HX Board is probably defective No Yes Yes Yes Yes No No No No Yes Yes ...

Page 43: ...defective Is the TPSC1 Waveform incorrect The D2 Board is suspected to be defective Are the voltages at connectors SC2 and SC23 of the SC board correct The Power Supply is suspected to be defective Are the trigger signals at connectors SC20 and SC21 of the SC board correct The D2 Board is suspected to be defective The SC Board is suspected to be defective NO NO NO NO NO YES YES YES YES YES ...

Page 44: ...o be defective Is the TPSS1 Waveform incorrect The D2 Board is suspected to be defective Are the voltages at connectors SS11 and SS12 of the SS board correct The Power Supply is suspected to be defective Are the trigger signals at connector SS33 of the SS board correct The D2 Board is suspected to be defective The SS Board is suspected to be defective YES YES YES YES YES NO NO NO NO NO ...

Page 45: ...y to be the cause Figure 34 Service Hints Symptom No picture black Screen v Suggestion The use of a magnifying glass can help localize the defective printed circuit board Use the magnifying glass to take a close look at the pixels of the screen 1 If the pixels are totally dark the defect is most likely located in one of the following boards a SC Board b SU Board c SD Board 1 Check the status of th...

Page 46: ...s suspected Suggestions Check the Scan pulse waveform at TPSC1 Use TPSS1 of the SS board to trigger the oscilloscope Verify the input signals at connector SC2 SC4 SC20 and SC21 Verify that the signals of the clock and serial data lines from the D board are present at connector SC20 and SC21 Figure 37 Figure 36 ...

Page 47: ...faintly lit the defect is most likely located in one of the following boards A SS Board B SS2 Board C S3 Board 1 Check the status of the LED located on the SS Board if the LED is dark a malfunction of the SS Board is suspected 2 Listen to the buzz noise of the SS board If the buzz noise is not present a malfunction of the SS Board is suspected 3 Verify the input signals at connector SS3 and SS1 SS...

Page 48: ... to trigger the oscilloscope Proceed to check the power sources at connector SS11 SS12 and SS33 Verify that the clock and serial data lines from the D board are present at connector SS33 Note It is easier to measure input levels at connector C33 of the C3 Board instead of connector SS33 Figure 40 ...

Page 49: ...in the area of the black bar 1 If the pixels are totally dark the defect is most likely located in one of the following boards a SC Board b SU Board upper half of the screen only c SD Board lower half of the screen only 2 If the pixels are dimly lit the defect is most likely located in one of the following boards a SS Board b SS2 Board upper half of the screen only c SS3 Board lower half of the sc...

Page 50: ...efect can be localized to the C2 Board or the D2 Board q Symptom Vertical Black Bar Suggestion Since the C3 board contains the serial to parallel converters for the picture data that drive this portion of the screen the most likely cause for this defect can be localized to the C3 Board or the D2 Board Symptom No OSD but it has video v Suggestion Check signal on the D1 board Figure 42 Figure 43 ...

Page 51: ...52 v Symptom Burned image pattern is visible Suggestion Activate the scroll bar or run the set with a white raster for at least fifteen minutes Panasonic Figure 44 ...

Page 52: ...Press the Setup button on the remote control 2 Use the Up Down arrow buttons on the remote to highlight screensaver then press the center button Use the Up Down arrow buttons to highlight the function Use the Left Right Arrow buttons to change the setting Negative causes the image to invert white areas become dark and vice versa White bar scroll causes a white bar to appear and scroll across the s...

Page 53: ...remote control 2 Use the Up Down arrow buttons to highlight Side bar adjust then press the action button 3 Use the Left Right Arrow buttons to select the desired setting Off Dark Mid Bright Note Setting the side bar to Bright may cause a flashing effect depending on the image being displayed Also Bright sidebars may cause an after image 4 Press the R button on the remote control to exit this menu ...

Page 54: ...the Option Menu 1 Press to display the Setup menu 2 Press to select OSD Language 3 Press the surround button on remote control for more than three seconds The action menu should be displayed on screen Figure 56 Figure 57 Figure 58 ...

Page 55: ...able Off timer operation Enable Disable On Screen display Off Enable Disable to display input mode indication after power on and no signal indication Input Initial Off Sets the initial input mode when the power is turned on Allow input mode selection while power is on Initial VOL level Sets the initial volume level when the power is turned on Allow Volume control while power is on Maximum VOL Leve...

Page 56: ...ting the remote control User Level and Remote ID off 1 Access service mode CAT mode and press SET UP key on remote 2 Access the hidden option menu 3 Change the remote control User Level and or Remote ID set to off ...

Page 57: ...t a board should be replaced it is advisable that these waveforms are checked to help achieve the right conclusion Figure 61 is an illustration of the HZ Board The board is the interface between the AV inputs and the D1 Board When troubleshooting connect a signal source to the input terminals and observe the output signals at the connector VIDEO YUV CONVERTER Figure 61 ...

Page 58: ... and I2 C inputs to the HZ Board are present If these are correct replacement of the HZ Board is recommended CN H2 Pin B3 20us div 20mV Blue Signal Output CN H2 Pin B5 20us div 20mV Red Signal Output CN H2 Pin A6 20us div 0 2V Horizontal Output CN H2 Pin A8 5ms div 0 2V Vertical Output CN H2 Pin A19 0 1ms div 0 2V SCL3 CN H2 Pin A20 0 1ms div 0 2V SDA3 CN H2 Pin B1 20us div 20mV Green Signal Outpu...

Page 59: ... listed above is missing Verify that all DC and I2 C inputs to the HZ Board are present If these are correct replacement of the HZ Board is recommended CN H2 Pin B17 5us div 20mV Blue Signal input CN H2 Pin B19 5us div 20mV Green Signal Input CN H2 Pin B15 5us div 20mV Red Signal Input CN H2 Pin A19 0 1ms div 0 2V SCL3 CN H2 Pin A20 0 1ms div 0 2V SDA3 ...

Page 60: ...on of the HX Board The board is the interface between the PC input and the D1 Board When troubleshooting connect a PC to the input terminals and observe the output signals at connector HX1 D3 See the next page for waveform samples Figure 62 ...

Page 61: ...DC inputs to the HX Board are present If these are correct replacement of the HX Board is recommended CN HX1 Pin B20 10us div 20mV Red Signal Input CN HX1 Pin B18 10us_20mV Green Signal Input CN HX1 Pin B16 10us div 20mV Blue Signal Input CN HX1 Pin B12 5ms div 0 2V Vertical Drive CN HX1 Pin B14 10us div 0 2V Horizontal Drive CN HX1 Pin A4 5us div 20mV Serial Data CN HX1 Pin B4 5ms div 0 2V Serial...

Page 62: ...n to the remaining boards of the panel The SC board is the interface between the D2 Board SU and the SD Boards When troubleshooting connect a fixed video source to any of the input terminals and observe the input signals at connector SS20 and SS21 See the next two pages for waveform samples ...

Page 63: ...ctor SC20 of the SC Board CN SC20 Pin 1 1ms div 0 2V CRL CN SC20 Pin 2 1ms div 0 2V CEL CN SC20 Pin 3 1ms div 0 2V CEH CN SC20 Pin 6 1ms div 0 2V CSL CN SC20 Pin 7 1ms div 0 2V CSH CN SC20 Pin 8 1ms div 0 2V CML CN SC20 Pin 9 1ms div 0 2V CMH CN SC20 Pin 10 1ms div 0 2V CRH ...

Page 64: ...t connector SC21 of the SC Board CN SC21 Pin 2 1ms div 0 2V CL CN SC21 Pin 3 1ms div 0 2V CLK CN SC21 Pin 4 1ms div 0 2V SIU CN SC21 Pin 9 1ms div 0 2V CPH CN SC21 Pin 6 1ms div 0 2V SID CN SC21 Pin 7 1ms div 0 2V SCSU CN SC21 Pin 8 1ms div 0 2V CPL ...

Page 65: ...nection to the remaining boards of the panel The SS board is the interface between the D2 Board SS2 and the SS3 Boards When troubleshooting connect a fixed video source to any of the input terminals and observe the input signals at connector SS32 See the next page for waveform samples ...

Page 66: ...ctor SS32 of the SS Board CN SS32 Pin 2 1ms div 0 2V URH CN SS32 Pin 3 1ms div 0 2V UEL CN SS32 Pin 4 1ms div 0 2V UEH CN SS32 Pin 5 1ms div 0 2V UBL CN SS32 Pin 6 1ms div 0 2V USH CN SS32 Pin 7 1ms div 0 2V UML CN SS32 Pin 8 1ms div 0 2V UMH CN SS32 Pin 10 1ms div 0 2V URL ...

Page 67: ... Single Defect Pair Defect Defect Distance G 0 A R 0 0 B 3 G B R 0 6 0 5 cm B Dead Pixel Zone Specification 1 Dead Pixel pixel is always off 2 Lit Pixel pixel is always on 3 Pair defect Adjacent pixels defective 4 Defects Distance Distance between nearest two defective pixels ...

Page 68: ...nput Level P BOARD CONNECTORS The following table lists the voltage levels present at each pin of the connectors of the P1 Board Use this information to confirm that the P1 Board is operating properly Connector P1 SS1 Pin Numbers Signal Name Signal Flow Board or Connector 1 NC P1 àSS1 SS BOARD 2 VSUS P1 àSS1 SS BOARD 3 VSUS P1 àSS1 SS BOARD 4 NC P1 àSS1 SS BOARD 5 GNDa P1 àSS1 SS BOARD 6 GNDa P1 à...

Page 69: ...ard or Connector 1 13 5V P5 àD25 D2 BOARD 2 13 5V P5 àD25 D2 BOARD 3 GND P5 àD25 D2 BOARD 4 GND P5 àD25 D2 BOARD 5 5 2V P5 àD25 D2 BOARD 6 GND P5 àD25 D2 BOARD 7 FAN CONT P5 àD25 D2 BOARD 8 GND P5 àD25 D2 BOARD Connector P6 Z6 Pin Numbers Signal Name Signal Flow Board or Connector 1 13 5V P6 àZ6 Z BOARD 2 GNDs P6 àZ6 Z BOARD 3 13 5V P6 àZ6 Z BOARD 4 NC P6 àZ6 Z BOARD 5 GNDs P6 àZ6 Z BOARD 6 5 2V P...

Page 70: ...tor P15 P15A Pin Numbers Signal Name Signal Flow Board or Connector 1 H OUT P15 àP15A P3 BOARD 2 H OUT GND P15 àP15A P3 BOARD 3 H VCC P15 àP15A P3 BOARD 4 NC P15 àP15A P3 BOARD 5 NC P15 àP15A P3 BOARD 6 L OUT P15 àP15A P3 BOARD 7 L DRIVE GND P15 àP15A P3 BOARD 8 L CNT GND P15 àP15A P3 BOARD 9 I SENSE GND P15 àP15A P3 BOARD 10 I SENSE P15 àP15A P3 BOARD 11 NC P15 àP15A P3 BOARD 12 18V P15 àP15A P3 ...

Page 71: ...nector 1 START P19 àP19A P6 BOARD 2 VCC P19 àP19A P6 BOARD 3 BACK UP P19 àP19A P6 BOARD 4 GATE P19 àP19A P6 BOARD 5 MULTI P19 àP19A P6 BOARD 6 H DRIVE GND P19 àP19A P6 BOARD 7 H SIGNAL GND P19 àP19A P6 BOARD 8 VRMS P19 àP19A P6 BOARD 9 IAC P19 àP19A P6 BOARD 10 TV ON P19 àP19A P6 BOARD 11 F B P19 àP19A P6 BOARD 12 OVP SOS IN P19 àP19A P6 BOARD Connector P22 P22A Pin Numbers Signal Name Signal Flow...

Page 72: ...àD3 D1 BOARD A 16 NC NC HX1 àD3 D1 BOARD A 17 NC NC HX1 àD3 D1 BOARD A 18 NC NC HX1 àD3 D1 BOARD A 19 PC Rs 5 2Vdc HX1 àD3 D1 BOARD A 20 PC Ls 5 2Vdc HX1 àD3 D1 BOARD Connector HX1 D3 Pin Number Signal Name Voltage Findings Signal Flow Board or Connector B 1 STB5V 5Vdc HX1 àD3 D1 BOARD B 2 STB5V 5Vdc HX1 àD3 D1 BOARD B 3 9V 9Vdc HX1 àD3 D1 BOARD B 4 9V 9Vdc HX1 àD3 D1 BOARD B 5 NC 0Vdc HX1 àD3 D1 ...

Page 73: ...V 5 2Vdc H1 àD1 D1 BOARD A 6 5V 5 2Vdc H1 àD1 D1 BOARD A 7 GND GND H1 àD1 D1 BOARD A 8 GND GND H1 àD1 D1 BOARD A 9 3 3V 3 46Vdc H1 àD1 D1 BOARD A 10 3 3V 3 46Vdc H1 àD1 D1 BOARD A 11 GND GND H1 àD1 D1 BOARD A 12 GND GND H1 àD1 D1 BOARD A 13 STB5V 5Vdc H1 àD1 D1 BOARD A 14 STB5V 5Vdc H1 àD1 D1 BOARD A 15 GND GND H1 àD1 D1 BOARD A 16 GND GND H1 àD1 D1 BOARD A 17 GND GND H1 àD1 D1 BOARD A 18 GND GND ...

Page 74: ...e V Vad V Made in Japan M Panel Production Date Panel Part Number Panel Serial Number Adjustment Voltage Year 9 1999 0 2000 1 2001 1 7 1 Month 1 January 2 February 3 March 9 September O October N November D December 1 Beginning of Month 1 10 2 Middle of Month 11 20 3 End of Month 21 31 Beginning of July 2001 Figure 65 ...

Page 75: ... below for the specified voltage Adjustment table Name Test Point Voltage Volume PFC P24 pin 1 400V 1V R548 Vsus P1 pin 2 175V 1V R625 Vda P3 pin 1 75 0 0 5V R545 Confirmation Name Test point Voltage 18V P4 pin 1 17 2V 0 5V 13 5V P5 pin 1 13 2V 0 5V Audio 15V P6 pin 1 Audio 13 5V 0 5V Audio 15V P6 pin 3 Audio 13 5V 0 5V 5 25V P5 pin 5 5 1V 0 3V STB5V P7 pin 4 5 0V 0 3V Figure 66 ...

Page 76: ...rmation label located on the heat sink of the panel See the next page for more information about the panel label Name Test point Voltage Volume Vsus TPVSUS SS BOARD Vsus 1V R625 P3 BOARD Vbk TPVBK SC BOARD Vbk 5V R6670 SC BOARD Ve TPVE SS BOARD Ve 1V R6770 SS BOARD Vset TPVSET SC BOARD 218 V 6V Vad TPVAD C9 BOARD Vad 1V R6477 SC BOARD Vda TP117 SC BOARD 74V 1V R545 P1 BOARD VSCN TPVSCN SC BOARD Va...

Page 77: ...nal Set the picture mode to Normal and the White Balance to Normal Adjustments Adjust the indicated test point for the specified waveform Use TPSS1 as the trigger source Test point Volume Level T1 TPSC1 SC R6523 SC Board 0 T2 TPSC1 SC R6557 SC Board 170 20µ Sec Figure 67 ...

Page 78: ...m Volume Test point Level PFC R548 P3 P24 connector pin 1 400V 1V Vsus R625 P3 TPVsus SS Vsus 1V P Board Vda R545 P1 TP117 C9 74V 1V Vad R6477 SC TPVAD SC Vad 1V SC Board Vbk R6670 SC TPVBK SC Vbk 5V SS Board Ve R6770 SS TPVE SS Ve 1V D1 D2 Board White Balance Pedestal and Sub brightness for NTSC Pal HD PC and 625i signals Refer to the Panel label for the exact value Adjustment Volume Locations Fi...

Page 79: ...80 Test Point locations Figure 69 ...

Page 80: ...om the front page of the CAT menu and then press the Action button on the remote control How to use the I2 C mode 1 Select the alignment subject by pressing the UP Down buttons on the remote control 2 Select the alignment item by pressing the Left and Right buttons on the remote control 3 Adjust the optimum setting by pressing the Volume Up Down buttons on the remote control 4 The data is memorize...

Page 81: ...en the main power switch is pushed to the off position To exit the CD mode press the R button on the remote control MiCom Software version Memory data version D Memory data version H Memory data change Address Data 0 11 0 11 1 21 05 0 0 0 0 OK 8 63 78 3F Factory Use New data Original data 0 0 0 0 Address Data Change by pressing the Up Down buttons on the remote control Change by pressing the Volum...

Page 82: ...Action button on the remote control OSD To exit the SD mode press the R button on the remote control Input command Check Power Protect MTBF Parameter WT PT 23 25 27 27 27 27 28 25 25 37 72 12 Remote Control mode A B History of remote control command Factory use Cumulative time for power on condition Unit hour Counter of power on Unit hour ...

Page 83: ...84 I2 C Menu Structure The values indicated in this flowchart are sampled data Figure 70 ...

Page 84: ...lor Temp X Y Cool High 0 272 0 290 Normal Mid 0 288 0 296 Warm low 0 313 0 329 Step 5 If the Sub Brightness has changed re adjust it to set Low light to 10 cd m2 Step 6 Find the 75 white area using the color sensor Step 7 Access the G Drive setting and set G Drive to D8 Step 8 Access the B and R Drive settings and adjust B and R Drive to set the color temperature as shown in table 1 Step 9 Repeat ...

Page 85: ...ssion starts at black 2 area and no emission occurs in the black 0 area Step 4 Under the Chroma Control setting Set Gun off to 3 Only blue pixels emitting Step 5 Access the RGB Sub Adjust B Sub Bright setting and adjust B Sub bright so that blue pixel emission starts at black 2 area and no emission occurs in the black 0 area Step 6 Under the Chroma Control setting Set Gun off to 6 Only red pixels ...

Page 86: ... Y Cool High 0 272 0 290 Normal Mid 0 288 0 296 Warm Low 0 313 0 329 Step 5 If the Sub Brightness has changed re adjust it to set Low light to 10 cd m2 Step 6 Find the 75 white area using the color sensor Step 7 Access the G Drive setting and set G Drive to D8 Step 8 Access the B and R Drive settings and adjust B and R Drive to set the color temperature as shown in table 1 Step 9 Repeat item 4 to ...

Page 87: ...ure of the R G B drive and cutoff data into table 3 Table 3 White Balance Cool Normal Warm R Drive G Drive B Drive R Cutoff G Cutoff B Cutoff Step 16 Input a RGB Signal Step 17 Copy the PC Data R G B drive and cutoff data to the RGB settings ...

Page 88: ...lor Temp X Y Cool High 0 272 0 290 Normal Mid 0 288 0 296 Warm Low 0 313 0 329 Step 5 If the Sub Brightness has changed re adjust it to set Low light to 10 cd m2 Step 6 Find the 75 white area using the color sensor Step 7 Access the G Drive setting and set G Drive to D8 Step 8 Access the B and R Drive settings and adjust B and R Drive to set the color temperature as shown in table 1 Step 9 Repeat ...

Page 89: ... R G B drive and cutoff data into table 5 Table 5 White Balance Cool Normal Warm R Drive G Drive B Drive R Cutoff G Cutoff B Cutoff Step 16 Change the Input signal to 525i and 525p Step 17 Copy the HD drive and cutoff data to the 525i and 525p settings ...

Page 90: ... X Y Cool High 0 272 0 290 Normal Mid 0 288 0 296 Warm Low 0 313 0 329 Step 5 If the Sub Brightness has changed re adjust it to set Low light to 10 cd m2 Step 6 Find the 75 white area using the color sensor Step 7 Access the G Drive setting and set G Drive to D8 Step 8 Access the B and R Drive settings and adjust B and R Drive to set the color temperature as shown in table 6 Step 9 Repeat item 4 t...

Page 91: ... 4 Set the white balance to Normal Step 5 Adjust all the cut off values to the same data values of the Cool mode settings Step 6 Set the white balance to Warm Step 7 Adjust all the cut off values to the same data values of the Cool mode settings Step 8 Apply the same pattern to the PC input Step 9 Repeat steps 1 8 Step 10 Apply the grayscale pattern to the RGB input Step 11 Repeat steps 1 8 Step 1...

Page 92: ...93 ...

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Panasonic TH-50PHD5, Troubleshooting Manual

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