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Diagnosis for Plasma Screen of PH42/50FBXX

And Maintenance of the Functions of Various Modules on Screen

1. Functions of Various Modules on Screen

As shown in the figure below, PDP screen can be divided into power supply board, X driving board, Y
driving board, logic board, logic BUFFER board (E, F, G), Y BUFFER board (upper and lower), COF etc.:

* Power supply board

: to supply power for the screen, other functional modules on the screen, our own

main board, and video frequency processing board.

* X driving board

: to produce and provide driving signal for X electrode according to the time sequence

signal sent from logic board.

* Y driving board

: to produce and provide driving signal for Y electrode according to the time sequence

signal sent from logic board.

*Logic board:

to process the image signal sent from the main board, to produce addressing signal and

to provide driving signal for X and Y driving boards.

*Logic BUFFER board (E, F):

To convert the data signal and control signal sent from the logic board

into the signals required by COF

Y BUFFER board

（

Upper

，

Lower

）

to transmit the scanning signal from the Y driving board to the

screen, which is divided into upper and lower parts.

COF:

to convert the signal sent from the logic BUFFER board into the address signal used by the

screen.

Power supply board

X driver board

Y driver board

Logic board

Logic
BUFFER(E)

Logic
BUFFER(F)

Logic
BUFFER(G)

Y BUFFER(up)

Y BUFFER(down)

COF

（

7 blocks

）

Содержание PH-42FB7

Страница 1: ...PDP TELEVISION PH 42FB7 America ...

Страница 2: ...tructions Method of software upgrading Working principle analysis of the unit Block diagram IC block diagram Wiring diagram Diagnosis for plasma screen Troubleshooting guide Schematic diagram APPENDIX Exploded View 1 6 11 17 18 19 28 29 32 44 ...

Страница 3: ...heat radiation parts or direct exposure to sunlight Otherwise there will be kickbacks 1 5 In case foreign substances such as water liquid metal slices or others fall into the module carelessly power must be cut off immediately Keep the module as it is and do not move anything on the module Otherwise it might be possible to contact the high voltage or cause shock short circuit so that it may lead t...

Страница 4: ... former On the other hand even if changes take place in the picture it can keep its brightness for a period of time several minutes It s a feature inherent with plasma and it s not abnormal However please try as much as possible to avoid showing a still picture of high brightness for a long time during operation 1 16 As a digitalized display devise this module is provided with error diffusion tech...

Страница 5: ...wn in Fig 1 i e bright spot remain bright dark spot non illuminating flickering spot continuously flickering However they should not exceed the specification as in table 1 Otherwise the product shall be deemed as sub standard Figure 1 Defective Points Table 1 Criterion for Three Kinds of Defective Points Kind Area A Area B Remark Dark spots No more than 2 No more than 8 Bright spot No more than 1 ...

Страница 6: ...nts allowed Stain 5 N 6 for the stain of which longer axis length is 5mm or shorter N 0 for the stain of which longer axis length is longer than 5mm D 50mm 1 Non Ignition Dot Dark Defect is defined as A cell of which more than 50 area is not ignited 2 Unstable Dot Flickering is defined as A cell which repeats On and Off 3 Uncontrollable Dot is defined as A cell which is distinctly brighter or dark...

Страница 7: ...he specification as in table 3 Otherwise the product shall be deemed as sub standard Figure 2 Defective Points Table 3 Criterion for Three Kinds of Defective Points Item Kind Area A Area B Remark 1 Dark spots No more than 4 No more than 10 2 Bright spot No more than 1 No more than 3 3 Flickering spots No more than 1 No more than 3 Total number of defective points in A and B shall not exceed 14 The...

Страница 8: ... press 2580 to enter level one factory menu Press CH and CH to select adjustment page then press OK to access Press CH Check DDC and FLASH To produce digital board and analog board All testing Adjust white balance Connect with central signal source then check each function of TV such as station missing analog control etc check the output of headphone and speaker Input AV SVIDEO signal then check e...

Страница 9: ...G select a support format of VGA enter white balance adjustment page of factory menu select cool color temperature of item fixed WBGG_VGA to 128 adjust WBRG_ VGA WBBG_VGA let the color coordinate of third level on the right be 270 283 at 120nits fixed WBGO_VGA to 128 adjust WBRO_VGA WBBO_VGA let the color coordinate of third level on the left be 270 283 at 5nits The brightness of 120nits and 5nits...

Страница 10: ...1 469 70 086 28 322 IBM 2 640 X 480 31 469 59 94 25 175 IBM 3 640 X 480 37 861 72 809 31 5 VESA 4 640 X 480 37 5 75 31 5 VESA 5 640 X 480 43 269 85 008 36 VESA 6 800 X 600 35 156 56 25 36 VESA 7 800 X 600 37 879 60 317 40 VESA 8 800 X 600 48 077 72 188 50 VESA 9 800 X 600 46 875 75 49 5 VESA 10 800 X 600 53 674 85 061 56 25 VESA 11 1024 X 768 48 363 60 004 65 VESA 12 1024 X 768 56 476 70 069 75 VE...

Страница 11: ...parate them in a longer distance Maybe the shielded layer of signal wire is not connected properly to the connector There appear streaks or light color on the screen Check if interfered by other equipment and if interfered possibly by the equipment like transmitting antenna non professional radio station and cellular phone 2 TV set Symptoms Possible cause Unable to switch the power on Check to see...

Страница 12: ... signal is not correctly identified and VGA format is beyond the specified scope Remote control cannot work properly Check if the batteries are installed in the reverse order Check if the battery is effective Check the distance or angle from the monitor Check if there is any obstruct between the remote control and the TV set Check if the remote control signal receiving window is exposed to strong ...

Страница 13: ...uter and TV set The cable must be a female to female RS 232 cable and the line is TXD to RXD and RXD to TXD cross link It s popular for PC to PC connection 2 If the computer has no RS 232 serial port e g Notebook PC you needs a additional USB to serial port cable ...

Страница 14: ... the update tools iDev exe to the path you want to do it and double click it 4 Select setup menu 5 Confirm the Serial port is right Base on the port which using for update And set the band rate to 115200 default ...

Страница 15: ...mage path menu 7 Confirm it s the right file 8 If it s not right Maybe you didn t select it before click the button to select ecc file Sometimes the image file you got it will be rar or zip zip file needs unzip it first ...

Страница 16: ...14 9 You also can click the setup button to select and config but please don t select the red one update boot sector 10 Then click the down button ...

Страница 17: ...15 11 You can see the waiting window 12 Then power off then on the TV set 13 After download it will be burning ...

Страница 18: ... 14 Last it will be finished 15 Press the IR locate keypad power key and holding for several second to force power off TV set then power on again It would be ok now If it s failure you can try once again ...

Страница 19: ...d stereo decoder fed to ZR39660 for information source decoding in the format of standard serial TS stream HD video signal via decoding to A D conversion and OSD superposition at last send to LVDS drive level for PDP panel HD audio signal via decoder built in ZR39660 resumed to multi channel sound of Dolby AC 3 at the same time output data stream of I2S format and S PDIF data stream Audio data of ...

Страница 20: ...GA400 2X16MX16 DDRAM HS VS CLK YPBPR2 YPBPR1 SN3257C LVDS M29W320E Panel FLASH HDMI IIS IN TS CVBS_TV HEF4052BT CVBS2 CVBS1 S_Y S_C SN3253C AV1 AUDIO AV2 AUDIO YPBPR1 AUDIO YPBPR2 AUDIO PC AUDIO D A CS4344 TPA3001D1 NJW1109 Loudspeaker Earphone IIS OUT CVBS Y C FQD1236 MK5 ZORAN PS 42J6 V1 0 R2S15900SP JEPICO j L003 Block diagram 18 ...

Страница 21: ...19 IC block diagram 1 ZR39140 ...

Страница 22: ... Chroma In W3 Video Front End Common Mode Reference 4 Analog Video Output K18 Composite Data Output CVBS J20 Blue Pb Pixel Data Output J18 Green Y Pixel Data Output J19 Red Pr Pixel Data Output 5 Audio I O R2 Audio Clock R3 Bit Clock P3 Left Right Channel Selector U2 Serial Audio Data Input T2 Serial Audio Data Output V1 IEC958 Format Out 6 LVDS Panel Interface B20 C19 Output Clock Pair E18 F17 Ou...

Страница 23: ...ned to produce sharp well defined coloration in personal computer LCD monitors and LCDTV screens as well as dot matrix displays in rear projection TVs PDPs and other devices The image enhancement functions built into the j L003 use a proprietary color management technology that makes it possible to produce images that are closer than ever to nature The j L003 also includes black white stretch brig...

Страница 24: ...28 29 30 31 BLUE Signal OUTPUT 3 I O CONTROL 148 RESET 151 SMMRSE 156 ADID0 157 ADID1 3 CAS220 CS The CAS 220 CSO is a multi standard demodulator and decoder for terrestrial and digital cable TV reception It is designed to support 8 VSB Vestigial Side Band in full compliance with ATSC Digital Television Standards ITU T J 83 Annex B and OpenCable Out of Band Signaling The CAS 220 CSO also demodulat...

Страница 25: ...he tuner 19 I2C clock from host 20 I2C data from to host 93 94 Differential input for IF 96 97 Differential input for SIF 63 Digital Sound Word select L R select 65 Digital Sound Serial data output 66 Digital Sound Serial clock 17 30 46 62 74 82 84 Power Supply 3 3V 5 9 22 37 53 69 75 78 86 87 99 Power Supply 1 8V 6 7 15 23 33 35 45 55 60 70 73 76 77 81 83 85 88 91 92 95 98 Ground ...

Страница 26: ... Pixel Clock Synthesizer The triple ADC support 12 110 MHz Sampling Rate It integrated 5 bit pixel clock phase adjustment for precise sample timing control It s Output support 4 2 2 Format Mode and it can Pin Compatible with AD9883A Block diagram of MST9883 is flow ...

Страница 27: ...8 External Clamp Input 30 Horizontal SYNC Input 31 Vertical SYNC Input 29 Hold PLL Frequency do not track HSYNC 56 Serial Interface clock 57 Serial Interface data pin 55 Serial interface address pin 70 77 Red output data 2 9 Green output data 12 19 Blue output data 67 Output data clock 66 HSYNC output 64 VSYNC output 39 42 45 46 51 52 59 62 Analog Power ...

Страница 28: ...d 5 R2S15900SP R2S15900SP is an audio signal processor It has MUTE and Volume Tone control It can support 5 input selector Pin descriptions of R2S15900SP 2 27 AV1 AUDIO INPUT L R 3 26 AV2 AUDIO INPUT L R 4 25 DTV AUDIO INPUT L R 5 24 EAR PHONE L R 6 23 AV OUT L R 11 19 AUDIO OUTPUT L R 17 18 I2C SDA SCL 28 Power Supply 12 Ground ...

Страница 29: ...8V power supply eliminating the need for heat sinks The TPA3001D1 is available in the 24 pin thermally enhanced TSSOP package Pin configuration of TPA3001 Pin description of TPA3001 1 Negative differential input 2 Positive differential input 3 4 gain control 10 11 Negative BTL output 14 15 Positive BTL output 9 16 24 Power Supply 6 12 13 18 19 Power Ground 5 Shutdown terminal ...

Страница 30: ...05 LA03 667 PS42D8 20 X603 X608 X501 XC01 XB01 XC02 X232 X103 X102 AV out Earphone S Video AV1 in AV2 in 667 PS42FB6 53 X105 X104 RF X606 X601 X106 X231 X101 X226 XB03 X801 X603 S PDIF Power filter board Speaker assy Panel Analog board Digital processing board Power board Logical board Button board 28 Wiring diagram ...

Страница 31: ...c board Y driving board to produce and provide driving signal for Y electrode according to the time sequence signal sent from logic board Logic board to process the image signal sent from the main board to produce addressing signal and to provide driving signal for X and Y driving boards Logic BUFFER board E F To convert the data signal and control signal sent from the logic board into the signals...

Страница 32: ...with separately If abnormal then first replace the power supply board to see if the problem is solved 2 There appears on the screen a line or several unlit lines Check if the socket between Y driving board and Y BUFFER is plugged well If not plug it well If yes then replace Y BUFFER upper lower in respect to the upper lower part of the dark line on the screen 3 There appear on the screen one or se...

Страница 33: ...COF or the screen b If it s an entire vertical block of other colors then first check to see if the connection socket between COF and logice BUFFER has problem If no problem check if the connection socket between the logic BUFFER and the logic board is normal If it s normal then replace the logic BUFFER If the problem still remains after the replacement then replace the logic board Finally if the ...

Страница 34: ...o picture abnormal of PC YPrPb and YCrCb f Failure with N104 which may lead to picture abnormal of TV AV1 AV2 S VIDEO g Failure with N803 N805 N806 which may lead to picture abnormal in all channels Begin A red indicator lights Check power board button board and power cord A blue indicator lights Check if the pin1 of X602 in data processing board is high level 5V check V660 V661 No No Yes turn the...

Страница 35: ...er board No sound No picture Power board problem Refer to 3 checking procedure Refer to 4 checking procedure No Yes Check the power board With picture but no sound Check if the voltage of sound amplifier of X106 in analog board is normal No Yes Check if the pin2 of N112 N113 inputs signals Check N112 N113 and their peripheral circuit Check N103 NB05 and their peripheral circuit Yes No ...

Страница 36: ...Yes No If there is no picture in all channels Check if the crystal in data processing board starts DDR clock and DDR SDRAM are normal Yes No Check N108 and its peripheral circuit Refer to 6 7 8 9 10 11 12 checking procedure Refer to 5 checking procedure Check N801 N802 DDR and their peripheral circuit and power supply Yes No ...

Страница 37: ...7 30 of X801is high level Check if the power supply of L801 L802 are normal Check if pin3 5 26 of N806 output H V SYNC and clock Check the peripheral and power supply of N801 N802 DDR of data board Yes No Check the peripheral and power supply of N806 Check if pin34 65 66 of N803 output H V SYNC and clock Yes No Check the peripheral and power supply of N803 Check the peripheral and power supply of ...

Страница 38: ... and the circuit from AV terminal to N104 Check the periphery circuit from XC02 to N801 Check N104 and its periphery circuit Check if C105 and C138 input signals Yes No Yes No Check if pin13 3 of N104 outputs signals Check N108 and the circuit from S terminal to N104 Check the periphery circuit from XC02 to N801 Check N104 and its periphery circuit ...

Страница 39: ...ically Check if pin11 of TUNER226 output signals Yes No Yes No Check if pin13 of N104 outputs signals Check TUNER226 power supply and the peripheral circuit Check the periphery circuit from XC02 to N801 Check N104 and its periphery circuit Check if pin6 7 of TUNER226 output signals Yes No Yes No Check if the crystal of N228 20MHz is normal Check TUNER226 power supply and the peripheral circuit Che...

Страница 40: ... signals Yes No Yes No Check resistor rows RA63 RA68 Check NA51 and peripheral circuit Check NB01 NB02 and the circuit from X807 X808 to N808 Check NB07 and peripheral circuit Check if pin4 7 9 of NB07 output signals Yes No Check if pin64 66 67 of NA51 are normal Yes No Check resistor rows RA63 RA68 Check NA51 and peripheral circuit Check NB03 NB04 and the circuit from X807 X808 to N808 ...

Страница 41: ...sure the connection between HDMI socket interface and the bus line is well going the picture will display Check DETECT NA04 and its peripheral circuit Yes No Check if signals of RA18 RA25 are normal Yes Check N801 and its peripheral circuit Check the connection to HDMI socket NA04 and its peripheral circuit ...

Страница 42: ...TR A6159M Isolation STR F6468 Isolation STR X6769 DC DC Isolation DC DC DC DC DC DC DC DC DC DC DC DC DC DC MCU ATMEGA8L IIC IR KEY VGA_H V LED RESET 5VCTRL Va Vs Overvoltage undervoltgae test Input AC voltage test Output voltage control ON OFF Va Vs active dischage control PFC OUT 400V 40 Block diagram of LG 42 power board ...

Страница 43: ...TR F6468 Isolation STR X6769 DC DC Isolation DC DC DC DC DC DC DC DC DC DC DC DC MCU ATMEGA8L IIC IR KEY VGA_H V LED RESET 5VCTRL Va Vs Overvoltage undervoltgae test Input AC voltage test Output voltage control ON OFF Va Vs active dischage control PFC OUT 400V L4981BD STR F6467 Isolation DC DC Block diagram of LG 50 power board ...

Страница 44: ...s Va Vs at the status of turn on MCU receives power down control from main CPU and performs power down time sequence power down time sequence is the same at AUTO mode At the two modes when detect the lower input AC voltage it will not perform power on At the status of turn on when detect the lower input AC voltage or 5VCTRL Va Vs beyond normal scope value it will perform the power down time sequen...

Страница 45: ...s Va Vs at the status of turn on MCU receives power down control from main CPU and performs power down time sequence power down time sequence is the same at AUTO mode At the two modes when detect the lower input AC voltage it will not perform power on At the status of turn on when detect the lower input AC voltage or 5VCTRL Va Vs beyond normal scope value it will perform the power down time sequen...

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Страница 54: ...Analog board ...

Страница 55: ......

Страница 56: ......

Страница 57: ...power board for LG 42 panel ...

Страница 58: ...power board for LG 42 panel ...

Страница 59: ...power board for LG 50 panel ...

Страница 60: ...power board for LG 50 panel ...

Страница 61: ... 667 PH42FB6 20 Power board 667 PH42FB6 52 Image processing board 667 PH42FB7 05 Key board 667 PH42T7 09 IR receive board 667 PH42T8 51 Power filter board 667 PS42FB6 53 Analog board 667 PS42FB6 69 Digital processing board 301 D42FB6 06E Remote control 335 42014 00 Panel ...

Страница 62: ...APPENDIX Exploded view PH42X7 ...

Страница 63: ...LEFT 16 Screen 17 870 10297 00 connection bracket 18 BACK CABINET ASS Y 19 804 2H445 AW0 BLACK PLATE 20 808 10880 AW0 BACK CABINET LEFT COVER 21 808 10882 AW0 BACK CABINET middle COVER 22 742 30078 00 TIE 23 870 40217 AR0A STAND 24 808 10888 AR0 STAND COVER 25 820 20060 00 WEIGHT BOARD 26 868 2A448 00 stand angle washer 27 615 10425 00 connection BRACKET ASS Y 28 808 10881 AW0 BACK CABINET RIGHT C...

Страница 64: ...603 PH42FB7 10 Ver 1 0 ...

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