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TH-42PX25U 3.3V SOS detect

Pin 2 of the Microprocessor IC9709 on the D board, monitors the 1.8V_S, the
1.8V, and the 3.3V generated on the D board. It also monitors the P12V
(Unregulated. 14V) generated on the P board. The 12V(Unregulated. 14V) from
the P board is connected to pin 1 and pin 2 of connector D25.

If the voltage in any of these lines drops, the SOS circuit is triggered.

Under normal conditions, the voltage drop derived from the voltage divider
circuits at the base of Q9714, Q9717, or Q9716 is enough to turn the transistor
on. However should the voltage drop at the base of any of these transistors
decrease, the transistor is turned off. This allows the 5 volts at their collectors to
forward bias transistor Q9715. This effectively grounds pin 3 of the CPU (IC9709)
on the D board, triggering the shutdown circuit.

Under normal condition, pin 3 of IC9709 is set to high.

TH-42PX25U 5V SOS Detect Circuit (D board)

Pin 2 of the Microprocessor IC9709 on the D board, monitors the P5V from the P
board
If there is a short or the voltage goes low, the voltage drop derived from the
voltage divider circuit goes low and the SOS circuit is triggered.

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Содержание GP6DU

Страница 1: ...Technical Guide Plasma Training Course GP6DU GPH6DU and GPH7D Onyx Chassis Troubleshooting Panasonic Services Company National Training ...

Страница 2: ...d 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...

Страница 3: ...assis 13 GPH7D Onyx 21 ONYX J Board Video Selector 21 ONYX J Board Sync Selector 22 ONYX DR Board Block Diagram 23 Onyx RGB Sync Analog to Digital Conversion 25 Onyx Data Drive Operation 26 GPH7D Onyx Tuner Receiver 27 Photo Viewer 28 Power on Operation 29 Power on Operation TH 42PD25U 29 TH 42PD25U P Standby Circuit 29 TH 42PD25U P Power On with Switch on the Front Panel 29 TH 42PD25U P Power On ...

Страница 4: ...Times 63 SOS Troubleshooting TH 42PX20U 65 Troubleshooting chart for the TH 42PX20U 69 Power LED blinks 2 Times 69 Power LED blinks 3 Times 70 Power LED blinks 4 Times 71 Power LED blinks 5 Times 72 Power LED blinks 7 Times 73 Power LED blinks 9 Times 74 Power LED blinks 12 Times 75 Power LED blinks 13 Times 76 TH 42PX25U P Protection Circuits 77 TH 42PX25U PA board SOS detect 79 TH 42PX25U 3 3V S...

Страница 5: ...25U TH 42PD25U TH 42PX25U and TH50PX25U 109 Heat Transfer Pads for Models Number TH 37PD25U TH 37PX25U TH 42PD25U TH 42PX25U and TH50PX25U 109 Corrupted EEPROM data in the 480i addressing area for Models Number TH 37PD25U TH 37PX25U TH 42PD25U TH 42PX25U and TH 50PX25U Service Bulletin SB B19 04 12 110 TH 37PX25U TH 42PX25U TH 50PX25U 113 Remedy to reduce the rattle noise from speaker 113 TH 42XVS...

Страница 6: ......

Страница 7: ...on for new circuits employed in this line of Plasma models Provide drawings with emphasis on signal path to simplify the task of signal tracing and to locate the cause of a defect Furnish troubleshooting procedures that contribute to a speedy repair of the product Provide examples of typical problems that may have occurred in similar types of circuits 1 ...

Страница 8: ...2 ...

Страница 9: ... Tuner_ NTSC Standard analog broadcasts for PIP PC SD Card Inputs Integrated Speaker System Surround Sound TH 42PD25U 42 inch EDTV Version 2 Component Video Inputs 3 Composite Video Inputs 3 S Video Inputs 1 HDMI HDCP input 1 Tuner _NTSC ATSC QAM SDTV and HDTV broadcasts Cable CARD Ready 1 Tuner_ NTSC Standard analog broadcasts for PIP PC SD Card Inputs Integrated Speaker System Surround Sound TH ...

Страница 10: ...igital Multimedia Receiver 2 Component Video Inputs 3 Composite Video Inputs 3 S Video Inputs 1 HDMI HDCP input 1 Tuner _NTSC ATSC QAM SDTV and HDTV broadcasts Cable CARD Ready 1 Tuner_ NTSC Standard analog broadcasts for PIP PC SD Card Inputs Integrated Speaker System Surround Sound TH 65XVS30UP 65 inch HD Version 720p via PC input only 2 Component Video Inputs 3 Composite Video Inputs 3 S Video ...

Страница 11: ...eiver to Plasma set It doesn t need to be close to components Long Life Expectancy Up to 60 000 hours comparable to CRT Over 25 years Based on approximately 6 hours a day 365 days per year equals 27 4 years Burn In Resistance Reformulated phosphors utilized Aging occurs much more slowly 8 58 Billion Colors via Improved Super Real Gamma 2 048 shades of gradations 8 58 billion colors Color reproduct...

Страница 12: ...n Noise Reduction New technology detects patterns that generate noise Circuit employs countermeasures to maximize image quality Image will be smoother and more natural with all sources New Sub Pixel Controller Handles contour correction at sub pixel level Greatly improves control precision of image Diagonal lines will appear sharp and straight Compare diagonal lines on Onyx XVS sets to other 6 ...

Страница 13: ...2PX25U P GPH6DU 1024x768 Yes 1536 Up to 3000 1 TH 37PX25U P GPH6DU 1024x720 Yes 1536 Up to 3000 1 TH 42PD25U P GP6DU 852x480 Yes 1536 Up to 4000 1 TH 37PD25U P GP6DU 852x480 Yes 1536 Up to 4000 1 TH 42XVS30 GPH7D Onyx 1024x768 Yes 1536 Up to 3000 1 TH 50XVS30 GPH7D Onyx 1366x768 Yes 1536 Up to 3000 1 TH 65XVS30 GPH7D Onyx 1366x768 Yes 1536 Up to 3000 1 TH 50PHW7BX GPH7D2 1366x768 Yes 1536 Up to 30...

Страница 14: ...8 ...

Страница 15: ...Boards Layout TH 42PD25U Boards Layout GP6DU Figure 1 TH 42PD25U boards layout TH 42PX25U Boards Layout GPH6DU Figure 2 TH 42PX25U boards layout 9 ...

Страница 16: ...TH 50PX25U Boards Layout GPH6DU Figure 3 TH 50PX25U boards layout TH 42XVS30 Onyx Boards Layout GPH7D Figure 4 TH 42XVS30 Board Layout 10 ...

Страница 17: ...TH 50XVS30 Onyx Boards Layout GPH7D Figure 5 TH50XVS30 Board Layout TH 65XVS30 Onyx Boards Layout GPH7D Figure 6 TH65XVS30 Board Layout 11 ...

Страница 18: ...12 ...

Страница 19: ...DMI input connector on the DG Board accepts signals to HDMI receiver where it undergoes serial to parallel conversion The output of the receiver is then converted to Y Pb Pr component signals before being applied to the Main switch The MPU selects one of the 8 inputs for main picture operation and another for sub picture operation On the DG Board the global core IC GC2M converts the composite vide...

Страница 20: ...14 Figure 7 Video Block Diagram ...

Страница 21: ...15 Figure 8 H Board Block Diagram ...

Страница 22: ...16 ...

Страница 23: ...Figure 9 H Board Block Diagram 17 ...

Страница 24: ...Figure 10 DG Board Block Diagram 18 ...

Страница 25: ...log Y Pb and Pr video signals The signals are output from IC5003 to a set of video amplifiers After amplification the signals are applied to the A Board via pins 14 16 and 18 of the connector DV7 DG51 Note To connect an external device that has a DVI output to a plasma panel model that has an HDMI input only use an adaptor cable and connect the Audio signal to the Audio jacks located below the HDM...

Страница 26: ...the DV Board After buffering the JPEG information is decoded by IC6013 and converted to luminance and chrominance data The digital video output of IC6013 is then converted to analog by IC6015 and output to the DG Board via the connector JG3 DG31 On the DG Board the luminance and chrominance photo viewer information is selected and processed as for any other video input 20 ...

Страница 27: ...sma panel models incorporate three video inputs IC3005 selects between Y Pb Pr and RGB signals that are output by the DR Slot 2 and HX boards The Y Pb Pr or RGB signals output by IC3005 are amplified by IC3101 and applied to the D board via pins 4 8 and 12 of the connector J1 D1 21 ...

Страница 28: ...board and enter the D board via pins 16 and 18 of the connector J1 D1 The horizontal and vertical drive signals of the HX board PC input are inverted by IC8016 and output to the D board via pins 17 and 20 of the connector J1 D1 Composite Component Video Input mode The luminance Y or G signals are applied to an input switch IC3005 The selected Sync signals output by IC3005 are applied to the sync p...

Страница 29: ...nnector and then to IC3304 for decoding into analog RGB The RGB signals are applied to pins 1 3 and 13 of the selector IC IC3309 The selected RGB signals are output via pins 4 14 and 15 The signals are then amplified by IC3310 and output to the J Board via pins A30 A32 and A38 of the connector CN3303 J1 Serial clock and data from the receiver box are applied via pins 6 and 7 of the video connector...

Страница 30: ...t by IC3305 are applied to an I2 C bus repeater circuit IC3307 before being applied to the EEPROM IC3308 The EEPROM contains the HDCP keys used to block or allow the display of the content of a particular program Data communication is bi directional allowing a complete handshake to take place before a program is viewed The DR board also performs sync selection of the input signals Horizontal and v...

Страница 31: ... in a later sectio of this manual S T connector J1 DG1 On the D Board the level shifter IC IC9850 changes their logic Level from 5V to 3 3V The output signals are applied to the Sync Processor IC IC97 for selection between RGB sync and LVDS sync not shown in the diagram The selected sync signals are output to IC9869 for analog to digital conversion IC9869 produces the digital sync and clock signal...

Страница 32: ...ht components The Plasma AI circuit converts the 8 bit signal data to 10 bit signal data The Sub field Processor is used to speed up the scanning process and control the number of Sustain periods This increases the brightness and improves the contrast ratio The Sub field Processor is also used to create the four channels of data that drive the C1 C2 C3 and C4 data output boards The D board provide...

Страница 33: ...e separate Tuner Receivers This receiver connects to the monitor using t 21 cables combined in one harness P N K1V245L20001 wo Figure 18 Connecting Cables All input and output connections are located on the receiver Figure 19 Tuner Receiver 27 ...

Страница 34: ...t Flash 1GB Smart Media 128MB Memory Stick 128MB XD Picture Card 128MB Flash ATA 128 MB Memory Stick Pro 1GB Note The cards require standard PCMCIA card adapter Some PC card adapters may not be compatible Figure 22 PCMCIA Adapter Mini SD Card requires Mini SD adapter Photo Viewer is not compatible with card type hard disk Micro Drive Mobile type hard disk etc When both the SD card and the PCMCIA c...

Страница 35: ... Q990 on the PF board turning it on This turns on the relay RL901 Via the relay AC is applied to the bridge rectifier D920 The DC control circuit IC 920 and T920 regulates the resulting DC and provides two voltage sources one is 10V and the other is 24V Both sources are routed to the PA Board The 10V source is routed via pins 1 and 2 of the connector PF10 PA10 and the 24V is routed via pin 5 of th...

Страница 36: ...tart up voltage for the sustain power supply T501 and IC551 which also utilizes the 380V to start its oscillation to generate the sustain voltage Vsus TH 42PD25U P Power On with Remote Control The sensor receiver on the K board receives the infrared signal from the remote control The signal is amplified and routed through the C2 board Then it is applied to pin 40 of the microprocessor IC9709 The r...

Страница 37: ...Figure 23 TH 42PD25U Power on operation 31 ...

Страница 38: ...32 ...

Страница 39: ... the PF board Yes No Yes No Check the K and PA boards Is there AC going in to pins 1 and 4 of connector P9 on the P board The D or the DG board may be defective Is there 10V on pin 1 and 24V on pin 5 of connector PF10 on the PF board Yes No Yes No Replace the P board If fuses on the PF are ok the PF board Can you confirm these voltages at connector PA12 on the PA board 3 7 11 17 21 25 5V 5V 5V 10V...

Страница 40: ...34 ...

Страница 41: ...P9 The AC is applied to a standby circuit D404 T410 and IC409 where the standby 7V is generated This voltage is applied to the 5V regulator circuit Q552 and Q537 to generate the standby 5V The standby 5V is applied to the microprocessors on the D board IC9701 and IC9709 This voltage is also routed through the PA board to the microprocessor on the DG board IC001 5V are also applied to the EEPROM an...

Страница 42: ...36 ...

Страница 43: ...DG6 DG3 Figure 24 TH 42PX25U Power on operation 37 ...

Страница 44: ...y sources when the TV is turned on by either the on off switch on the set or remote control Power Detect is accomplished by applying the Main 5V via pins 11 and 13 of connectorPA2 DG2 to Q030 which applies a Low to pin 52 of IC001 The on off switch on the front panel is a momentary switch located on the K Board that grounds pin 67 of IC001 when pressed In addition the High from pin 53 is used to c...

Страница 45: ...Figure 25 TH 42PX25U P Power on operation 39 ...

Страница 46: ...e PF board Yes No Yes No Check the K and PA boards Is there AC going in to pins 1 and 4 of connector P9 on the P board The D or the DG board may be defective Is there 10V on pin 1 and 24V on pin 5 of connector PF10 on the PF board Yes No Yes No Replace the P board If fuses on the PF are ok the PF board Can you confirm these voltages at connector PA12 on the PA board 3 7 11 17 21 25 5V 5V 5V 10V 9V...

Страница 47: ...T410 This circuit supplies 12V and 5V 7V on schematic The diode D511 rectifies the 12V and D510 rectifies the 5V 7V on schematic The 5V is connected to a 5V regulator IC700 on the Power Control board PC via pin 12 of the connector P700 PC700 The regulated 5V serves as the VCC source for IC 701 on the PC Board The 12V is routed through the sustain SS board to the power on off switch on the S1 board...

Страница 48: ... This allows both Power supplies to run in tandem Power On with Remote Control The signal from the remote control is picked up by the remote control receiver on the V1 board and routed through the C4 and C5 boards before it is applied to connector D33 on the D board On the D board the signal is applied to a DC level shifter circuit Q9015 and Q9016 to change the logic level of the data to 3 3V The ...

Страница 49: ...4 1 Figure 26 TH 65XVS30 Power On operation 43 ...

Страница 50: ... pin 20 of P700 of the SS Power board go high Check the SS Power board and the SC Power board Yes No No Yes Check the SS Power board and the SC Power board Check the PC board Can 12V be measured on pin 10 of connector P12 when turning the power on Check the PC board Yes No Check the SS Power board and the SC Power board Can 12V be measured on pin 8 of connector P12 when turning the power on Yes No...

Страница 51: ...ophic damage A shutdown occurs when an over voltage condition a short or a drop in any of the voltage lines occurs Also shutdown occurs when any of the fans draw more current than normal The microprocessor IC9709 monitors the SOS lines to detect a shutdown condition and relays the information to the main microprocessor to shut the unit down Figure 27 TH PD25U_SOS Detect Circuit 45 ...

Страница 52: ... The following table identifies the areas where a problem is suspected according to the number of times that the POWER LED blinks Power LED blinking timing chart for the TH 42PD25U P Number of Times the Power LED Blinks 2 Scan Driver 1 SOS2 TPSOS2 L6604 on SC Board 3 3 3V SOS 4 5V SOS 5 Power Supply SOS Pin 7 of connector P27 6 7 SOS1 Scan Driver 2 TPSOS1 L6603 on SC Board 8 9 SUS Driver TPSOS3 on...

Страница 53: ...transistor Q7544 goes into conduction causing its collector to go low As a result Q7541 conducts and applies a high to pin 69 of the MPU IC001 through pin 33 of connector PA2 on the PA board This triggers the SOS circuit The main 9V the VD1 5V the main 5V and the main 2 5V are also monitored for a drop in voltage A decrease in any of these two supply lines forces the respective diode to conduct an...

Страница 54: ...48 ...

Страница 55: ...49 Figure 28 TH 42PD25U PA board SOS detect ...

Страница 56: ...50 ...

Страница 57: ...ge divider circuits at the base of Q9714 or Q9716 is enough to turn the transistor on However should the voltage drop decrease either Q9716 or Q9714 turns off allowing 5 volts at their collectors to forward bias transistor Q9715 This effectively grounds pin 3 of the CPU IC9709 on the D board triggering the shutdown circuit Figure 29 TH 42PD25U 3 3V SOS detect 51 ...

Страница 58: ...e The reference voltage is provided by a zener diode If the output of the comparator goes high a transistor turns on effectively grounding the SOS line The SC board uses a similar circuit Additionally the SS and SC boards contain LED indicators 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 Figure...

Страница 59: ...Figure 31 SS board SOS Detect 53 ...

Страница 60: ...ks 1 2 SOS2 pin 12 SC20 on SC Board 3 3 3V SOS Pin 1 P25 4 5V SOS Pin 5 P25 5 Power Supply SOS Pin 7 of connector P27 6 7 SOS1 Scan Driver 2 pin 11 SC20 on SC Board 8 9 SUS Driver pin9 SS23 L719 SS Board 10 11 12 Tuner Power 13 Fan SOS pin 33 of PA2 Cathode of D7546 on PA Board Table 6 54 ...

Страница 61: ...Figure 32 TH 42PD25U 12X 9X 5X 4X 7X 2X 3X 55 TH 42PD25U P Note The numbers followed by the letter X within this picture indicate the number of times the POWER LED flashes ...

Страница 62: ...56 ...

Страница 63: ...D25U Power LED blinks 2 Times No Yes No N Yes Is the voltage low at pin12 of connector SC20 on the SC board Replace the D board Is 15V present on TP15V on the SC board Replace the SC board Replace the P board SC Board SC Board SC Board 57 ...

Страница 64: ...LED blinks 3 Times No Yes No Yes Is 12V present on pin 1 of connector P25 on the P board Replace the D board Are5V present on pin 5 of connector P25 on the P Replace the P board P Board P Board D PA Boards 58 ...

Страница 65: ...Power LED blinks 4 Times No Yes Replace the P board Replace the D board Is 5V present on pin 5 of connector P25 on the P board P Board P Board D PA Boards 59 ...

Страница 66: ...Power LED blinks 5 Times P board P Board D PA board No Yes Replace the D board Replace the P board Does the voltage at pin 7 of connector P27 go low 60 ...

Страница 67: ...o Does the voltage at pin 11 of SC20 go low Yes No Replace the D Board Replace the SC board Note Both the SU and the SD boards may load down the SC board Isolate them before replacing the SC board Check voltage at pin11 of SC20 using a peak hold meter SC board SC board 61 ...

Страница 68: ...Power LED blinks 9 Times Yes No Yes Is the red LED on the SS board lit Replace the D Board No Does the voltage at pin9 of SS23 L719 go low Replace the SS board SS board SS board 62 ...

Страница 69: ... No Yes Yes Does the voltage on pin 33 of PA2 Cathode of D7546 on the PA board go high Is there 10V on pin1 and 24Von pin5 of PA10 on the PA board Replace the PA board PA board PA board Replace the D board Replace the PF board 63 ...

Страница 70: ...64 ...

Страница 71: ...and P boards 3 3 3V SOS D and P boards 4 5V SOS D board 5 Power Supply SOS Pin 7 of connector P27 P and D boards 7 SOS1 Scan Driver 2 TPSOS1 L6603 on SC Board SC SU SD and D boards 9 SUS Driver TPSOS3 on SS Board SS and D boards 12 Tuner Power SS and D boards 13 Fan SOS Pin 6 of connector P27 on P Board Fan and D board Table 7 65 ...

Страница 72: ...66 ...

Страница 73: ...TH 42PX20U P Note The numbers followed by the letter X within this picture indicate the number of times the POWER LED flashes Figure 33 TH 42PD20U 12X 13X 3 2 4 7 9 5 67 ...

Страница 74: ...68 ...

Страница 75: ...H 42PX20U Power LED blinks 2 Times No Yes No Yes Is the voltage low on TPSOS2 on the SC board Replace the D board Is 15V present on TP15V on the SC board Replace the SC board Replace the P board SC Board P Board SC Board SC Board 69 ...

Страница 76: ...ED blinks 3 Times No Yes No Yes Is 12V present on pin 1 of connector P25 on the P board Replace the D board Is 5V present on pin 5 of connector P25 on P Board Replace the P board D PA Boards P Board P Board 70 ...

Страница 77: ...nce this board is located underneath the PA board it is very difficult to get to the test point while the TV is on Replace the D board Normally this condition is triggered when the 5V line is loaded down on the D board D board 71 ...

Страница 78: ...Power LED blinks 5 Times P board D PA board P board No Yes Replace the D board Replace the P board Does the voltage at pin 7 of connector P27 go low 72 ...

Страница 79: ...rd lit No Yes Does the voltage at TPSOS1 go low Replace the D Board No Replace the SC board Note Both the SU and the SD boards may load down the SC board Isolate them before replacing the SC board Check voltage at TPSOS1 using a peak hold meter SC board SC board 73 ...

Страница 80: ...Power LED blinks 9 Times Yes No Yes Is the red LED on the SS board lit Replace the D Board No Does the voltage at TPSOS3 go low Replace the SS board SS board SS board 74 ...

Страница 81: ...imes No No Yes Yes Does the voltage on TPB7516 Cathode of D7546 on the PA board go high Is there 10V on pin1 and 24V on pin5 of PA10 on the PA board Replace the PA board Replace the D board Replace the PF board PA board 75 ...

Страница 82: ...3 Times No Yes Replace the D board Replace fan Unplug P30 P33 one at a time to determine which fan is defective Does the voltage at pin 6 of connector P27 on the P board go low P board Fan SOS P board P30 P33 P board 76 ...

Страница 83: ... creating catastrophic damage A shutdown condition occurs when a there is an over voltage a short or a drop in any of the voltage lines Also when the fans are drawing more current than normal the shutdown circuit is triggered The microprocessor IC9709 detects when a shutdown condition has been triggered Figure 34 TH PX25U_SOS Detect Circuit 77 ...

Страница 84: ...e Power LED Blinks 1 2 SOS2 TPSOS2 L6604 on SC Board 3 3 3V SOS 4 5V SOS 5 Power Supply SOS Pin 7 of connector P27 6 7 SOS1 Scan Driver 2 TPSOS1 L6603 on SC Board 8 9 SUS Driver TPSOS3 on SS Board 10 11 12 Tuner Power 13 Fan SOS Pin 6 of connector P27 on P Board Table 8 78 ...

Страница 85: ... line If any of these supply lines increase in voltage the transistor Q7544 goes into conduction causing its collector to go low As a result Q7541 conducts and applies a high to pin 69 of the MPU IC001 through pin 33 of connector PA2 on the PA board This triggers the SOS circuit The main 9V the VD1 5V the main 5V and the main 2 5V are also monitored for a drop in voltage A decrease in any of these...

Страница 86: ... of Q9714 Q9717 or Q9716 is enough to turn the transistor on However should the voltage drop at the base of any of these transistors decrease the transistor is turned off This allows the 5 volts at their collectors to forward bias transistor Q9715 This effectively grounds pin 3 of the CPU IC9709 on the D board triggering the shutdown circuit Under normal condition pin 3 of IC9709 is set to high TH...

Страница 87: ...IC9709 Figure 36 TH 42PX25U 3 3V_SOS_5V_SOS detect 81 ...

Страница 88: ...e The reference voltage is provided by a zener diode If the output of the comparator goes high a transistor turns on effectively grounding the SOS line The SC board uses a similar circuit Additionally the SS and SC boards contain LED indicators 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 Figure...

Страница 89: ...Figure 38 SS SOS Detect 83 ...

Страница 90: ...84 ...

Страница 91: ...from creating catastrophic damage A shutdown condition occurs when a there is an over voltage a short or a drop in any of the voltage lines Also when the fans are drawing more current than normal the shutdown circuit is triggered The microprocessor IC9003 detects when a shutdown condition has been triggered Figure 39 SOS Detect Circuit 85 ...

Страница 92: ... The following table identifies the areas where a problem is suspected according to the number of times that the POWER LED blinks Power LED blinking timing chart for the TH 42XVS30 Number of Times the Power LED Blinks 1 2 SOS2 TPSOS2 L6604 on SC Board 3 3 3V SOS 4 5V SOS 5 Power Supply SOS Pin 7 of connector P27 6 Fan SOS 7 SOS1 Scan Driver 2 TPSOS1 L6603 on SC Board 8 9 SUS Driver TPSOS3 on SS Bo...

Страница 93: ...9004 Q9005 or Q9006 is enough to turn the transistor on However if the voltage drop at the base of any of these transistors decreases the transistor is turned off This allows the 5 volts at their collectors to forward bias transistor Q9009 This effectively grounds pin 96 of the CPU IC9003 on the D board triggering the shutdown circuit Under normal conditions pin 96 of IC9003 is set to high TH 42XV...

Страница 94: ...Figure 40 3 3V SOS and 5V SOS Detect Circuit TH 42XVS30 88 ...

Страница 95: ......

Страница 96: ...reference voltage is provided by a zener diode If the output of the comparator goes high a transistor turns on effectively grounding the SOS line The SC board uses a similar circuit Additionally the SS and SC boards contain LED indicators 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 Figure 41 SS...

Страница 97: ...Figure 42 SC SOS Detect Circuit TH 42XVS30 91 ...

Страница 98: ...is line Q8200 goes out of conduction providing a high on pin 10 of the expander I O IC IC3004 on the J board This change of voltage on pin 10 is reported to the main microprocessor IC IC9003 on the D board through the SCL3 and the SDA3 bus line The DC level shifter circuit Q9000 and Q9002 reduces the signal DC level to 3 3V to match the DC operational level of IC9003 Figure 43 Tuner SOS Detect 92 ...

Страница 99: ... a low condition is applied to pin 94 of the Microprocessor IC9003 on the D board If there is a short or excessive load on the Vsus line Q511 turns on grounding pin 17 of IC501 thus making pin 15 go high When pin 15 goes high it turns off Q544 and a low condition is applied to pin 94 of the Microprocessor IC9003 on the D board TH 42XVS30 Fan SOS Detect The two ventilation fans are monitored to be ...

Страница 100: ...94 ...

Страница 101: ...Figure 44 Power SOS and Fan SOS Detect Circuit TH 42XVS30 95 ...

Страница 102: ...96 ...

Страница 103: ...TH 42XVS30 4X 3X 2X 7X 9X 5X 12X Figure 45 97 ...

Страница 104: ...98 ...

Страница 105: ... TH 42XVS30 Power LED blinks 2 Times No Yes No Yes Is the voltage low on TPSOS2 L604 on the SC board Replace the D board Is 15V present on TP15V on the SC board Replace the SC board Replace the P board SC board SC board SC board 99 ...

Страница 106: ...links 3 Times No Yes No Yes Is 12V present on pin 1 of connector P25 on the P board Replace the D board Is 5V present on pin 5 of connector P25 on the P board P board D and Z boards P board Replace the P board 100 ...

Страница 107: ...Power LED blinks 4 Times No Yes Replace the P board Replace the D board Is 5V present on pin 5 of connector P25 on the P board P board P board D and Z boards 101 ...

Страница 108: ...Power LED blinks 5 Times P board No Yes Replace the P board Does the voltage at pin 7 of connector P27 go high Replace the D board P board D and Z boards 102 ...

Страница 109: ... Replace the D Board No Yes Does the voltage at TPSOS1 L604 go low Replace the SC board Note Both the SU and the SD boards may load down the SC board Isolate them before replacing the SC board No Yes Check voltage at TPSOS1 using a peak hold meter SC board 103 ...

Страница 110: ...Power LED blinks 9 Times Yes No Yes Is the red LED on the SS board lit Replace the D Board No Replace the SS board Does the voltage at TPSOS3 L116 go low SS board SS board 104 ...

Страница 111: ... No Yes Yes The problem is in the Receiver Is there 15V on pins 5 and 6 of connector PF10 on the PF board Replace the J board Replace the PF board Disconnect the Tuner Receiver and see if the problem persists PF board J board 105 ...

Страница 112: ...106 ...

Страница 113: ...ot compatible with the existing G18 wire harness and the interconnected H board software To operate a new DG board software a new matched H board is necessary Figure 46 Original G18 wire harness and the incompatible DG board with the larger connector DG18 Order Part TXAUX01QCSU Order and install a complete tuner block assembly contains DG board H board Tuners and wire harnesses whenever a DG board...

Страница 114: ...n the Service Bulletin number SB B19 04 01 This modification applies to units with serial numbers less than or equal to YD3510432 regardless of the original complaint or symptom Order part number C5HABZZ00123 Note Units with serial numbers greater than YD3510433 already have an improved IC551 and are not affected Warranty Codes Symptom Code Use INTD for Intermittently dead units or DEAD depending ...

Страница 115: ...ards in the Plasma Display Television models listed above it is absolutely essential that the Heat Transfer Pads Soft gray spongy material be transferred to the replacement board These pads are mounted on certain ICs located on the boards They are used as replacement for the traditional metal heat sinks used for heat dispersion Figure 48 Heat Transfer Pads Location 109 ...

Страница 116: ...n 480i sources 3 Image has a narrow black bar across the top edge of the screen in 480i only 1080i HD is ok 4 Image appears in a narrow band at the top edge of the screen Bottom portion is all black Switching aspect mode to Zoom Mode will display picture ok 1080i HD is also ok 5 Any loss of picture distortion or other symptom affecting only 480i display Symptom 4 Symptom 3 Symptom 2 Symptom 1 Figu...

Страница 117: ... THIS EEPROM DATA UPDATE regardless of the original failure or customer complaint If this EEPROM update does not resolve the listed symptoms a replacement DG board may be needed Call Panasonic s Tech Support line at 1 800 743 2335 for assistance and or a board authorization 111 ...

Страница 118: ...112 ...

Страница 119: ... the Tech Support Hotline TH 42XVS30 onyx Information about the speakers When connecting the speakers to the TV be sure to use only the optional accessory speakers There are no replacement parts available for the speakers at all If there are any problems with the speaker whether it s cosmetic or functional in nature order the complete replacement speaker accessory part number TY SP42XV 113 ...

Страница 120: ... Set Gun off to 6 Only red pixels cess the RGB Sub Adjust R Sub Bright setting and adjust R Sub to PC RGB signal Repeat procedure 1 to 7 using PC S Step 2 Under the Chroma Control setting Set Gun off to 5 Only g emitting Step 3 Ac bright so that green pixel emission starts at black 2 area and no emission occurs in the black 0 area Step 4 Under the Chroma Co emitting Step 5 Ac bright so that blue p...

Страница 121: ... pattern and 80 IRE patterns and verify that the drive and cutoff settings match the settings in Table 10 Adjust as necessary Step 10 Adjust the All Drive Settings value to FC Step 11 Reapply the 20 IRE pattern and verify the light settings to match with the table below adjust as necessary Reference Values Color Temperature X Y Cool High 0 276 0 276 Normal Mid 0 288 0 296 Warm Low 0 313 0 329 Tabl...

Страница 122: ...0 IRE pattern and 80 IRE patterns and verify that the drive and cutoff settings match the settings in Table 11 Adjust as necessary Step 10 Adjust the All Drive Settings value to FC Step 11 Reapply the 20 IRE pattern and verify the light settings to match with the table below adjust as necessary Reference Values Color Temperature X Y Cool High 0 276 0 276 Normal Mid 0 288 0 296 Warm Low 0 313 0 329...

Страница 123: ... emission starts in the 2 area and there is no emission in the 0 area Step 3 Write down all cut off data Step 4 Set the white balance settings 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 settings to Warm Step 7 Adjust all the cut off values to the same data values of the Cool mode settings Step 8 Change the pattern t...

Страница 124: ... Man Menu 3 Press and hold the MUTE button on the remote control for a few seconds The display will change from the standard serviceman mode setting to the EEPROM address data display EEPROM Address Data Display 4 Press the Channel Down button of the remote or receiver to select the EEPROM ADDRESS 1584 5 Press the Volume Up button of the remote or receiver to set the data at EEPROM address to 01 D...

Страница 125: ...maximum Volume level Range 0 to 63 The receiver allows the user to adjust the volume level up to the Maximum Vol selected Note When the Initial Vol is larger than the Maximum Vol make the Initial Vol and Maximum Vol the same value INITIAL CH The receiver automatically selects this channel each time power is switched on Selection OFF 0 to 69 for TV mode and C0 to C125 for cable mode OFF gives prior...

Страница 126: ...Note To return the unit to normal operation use steps 1 through 5 to change the data at EEPROM address 1584 to 00 the Hotel mode is now disabled All normal user functions are restored 120 ...

Страница 127: ...roducts 1 800 572 2672 Authorized Service Centers only access code required Fax 1 800 348 7315 1 201 392 4207 Non authorized limited time access Other Numbers 1 800 833 9626 Parts Dept 1 800 458 5397 Musical Instruments 1 201 392 4843 Telephone PBX Systems 1 800 414 4408 Cellular Phones 1 877 924 2473 Massage Loungers 1 201 392 4281 Commercial MWO Hotel Televisions Table 13 121 ...

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