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3. Troubleshooting guide

3.1 No raster, no picture and no sound

Note: Power supply for PDP is provided with over current and over voltage protection functions.
If there is over current or over voltage, this protection will function and no output.

Check 5V-STBY

Cut off between the power

board and signal processing,

check the 5V-STB

Cut off the the power
board and video board
to main board, check
it

Power board
problem

Check the supply
power D3.3V

Short circuit the pin 1 (STANDBY)
of X604 to 5V, then check the
supply power.

U24
abnormal

Pull out P2 check
power

Check N501 and
N601

Short circuit in
a power line

Power board
problem

Abnormal

Normal

Abnormal

Normal

Check if the indicator is light

Yes

Normal

Check the
supply power
of N606 and
crystal.

Normal

Abnormal

Check the power of
N201, N601, N204
and N701, crystal and
bus.

Содержание LCD-47XR2

Страница 1: ...FILE NO SERVICE MANUAL LCD 47XR2 LCD TV PRODUCT CODE No 1 682 342 81 AUS SS etc 1 682 343 78 INDIA REFERENCE No SM0915013 ...

Страница 2: ...nment instructions Software upgrade method Working principle analysis of the unit Block diagram IC block diagram Wiring diagram Troubleshooting Schematic diagram APPENDIX A Assembly list APPENDIX B Exploded view 1 3 8 9 11 12 24 25 33 ...

Страница 3: ... will result 2 5 If any foreign substance such as water liquid metal slices or other matters happens to fall into the module be sure to cut the power off immediately and do not move anything on the module lest it should cause fire or electric shock due to contact with the high voltage or short circuit 2 6 Should there be smoke abnormal smell or sound from the module please shut the power off at on...

Страница 4: ...0 85 Scope for storage 10 90 2 13 Display of a fixed picture for a long time may result in appearance of picture residue on the screen as commonly called ghost shadow The extent of the residual picture varies with the maker of LCD screen This phenomenon doesn t represent failure This ghost shadow may remain in the picture for a period of time several minutes But when operating it please avoid disp...

Страница 5: ...urce check if the various terminal functions system identify and analog control etc and the picture and sound of AV out is normal Check the TV board Input YpbPr YcbCr 1 2 signal source check if the picture and sound analog control is normal in the COMPONENT state The AV out output sound is originally signal Input HDMI and DVI signal source check if the HDCP KEY is normal The AV out output sound is...

Страница 6: ...rm color temperature coordinate 284 299 LC 42T17 LC 47T17 and LC37T25 T7 cool color temperature coordinate 270 283 3 5 1 HDMI channel a Input 8 level gray signal 720p 60Hz b Brightness to 50 contrast to 50 c Color temperature to warm d Enter color temperature setup menu e Adjust RED GAIN GREEN GAIN BLUE GAIN until the fifth level color coordinate 270 283 3 5 2 D SUB channel a Input the 16 level gr...

Страница 7: ... the l and m step until the fourth and the seventh level color coordinate 270 283 o Holding the pattern signal change the timing signal repeat the G to the M step for 480i 480p and 1080i signal 3 5 4 the VIDEO channel a Input the eight level gray signal of PAL b Brightness to 50 contrast to 50 c Enter the factory menu d Color temperature to warm e Enter the color temperature setup menu f Adjust th...

Страница 8: ...ck the AV OUT 4 2 AV1 S AV2 input terminals Input AV1 S AV2 signal source check the picture and sound 4 3 VGA terminal Input the VGA signal K7253 signal generator separate input VGA format signal of table 1 check the picture and sound Table1 PC display format signal No Resolution H frequency kHz V frequency Hz pixel clock pulse frequency MHz remark 1 720 x 400 31 47 70 08 25 17 DOS 2 640 x 480 31 ...

Страница 9: ...TV 1080p 4 5 HDMI terminal Input the DHMI signal source VG849 signal generator separate input format signal in table of table 3 check the picture and sound Table 3 HDMI format signal No H frequency kHz V frequency Hz signal 1 15 735 60 SDTV 480i 2 15 625 50 SDTV 576i 3 31 47 60 SDTV 483p 4 45 00 60 HDTV 720p 5 33 75 60 HDTV 1080i 6 28 13 50 HDTV 1080i HDMI format signal of audio channel 2 sampling...

Страница 10: ...puter features set up the serial port COM Port Select corresponding serial port if it s unable to FLASH WRITE change to another port Baud is selected to be 115200 Then select Reset Target After Download Click FLASH pushbutton it s ready to run For other settings please refer to the Fig Above already defaulted by the system normally no need to change Switch on TV set the FLASH write program begins ...

Страница 11: ...to sound amplifier TPA3008 to do amplification and then sent to speaker Image parts Video signal of the tuner will be sent to AV switch box M52797 N400 video signal of AV1 and AV2 will also be sent to M52797 N400 at the same time two groups of video output will be obtained after switching one group of video output together with its audio output will be sent to AV_OUT terminal to treat as AV OUT Th...

Страница 12: ... High definition 1080P LCD 16 9 wide screen Support several kinds of HDTV wide voltage range low standby power consumption less than 1W One group of D SUB S VSH Y C RS232 AVOUT HEADPHONE HDMI two groups of YPbPr YCbCr AV ...

Страница 13: ... PC YPbPr2 Tuner AV1 YPbPr1 AV2 PW2300 memory NJW1109 SRS processor M62494 TPA3008D2 LA72700V STERO SAP decoder RF Video RF Audio Earphone socket of with switch PC Audio HDMI Audio YPbPr2 YPbPr1 RS232 AV Audio Out I2 C1 S PCM1742 I2 S D A DS90C387 LCD panel MEGAL8 EEPROM 24LC32 I2 C2 IR KEY AV MAX3232C KEY EEPROM PW2300 11 ...

Страница 14: ...0 have HDMI digital and analog terminal of working frequency 165Hz it support 1080P non interlaced scanning and UXGA 1600 x 1200 60Hz video format also it support eight audio channel of 192KHz AD9398 without analog terminal Internal Block Diagram ...

Страница 15: ...nverter output 49 DDC_CLK HDCP Slave Serial Port Data Clock 92 99 GRE 0 7 Converter output 50 DDC_DATA HDCP Slave Serial Port Data I O 20 21 MCLK Control clock output 51 MCL HDCP Master Serial Port Data Clock 22 I2S_SCK Audio serial clock output 52 MDA HDCP Master Serial Port Data I O 23 I2S_WS Bus clock data output 82 SCL 1 Serial Port Data Clock ...

Страница 16: ...2 DVI input 89 G_CLK Data Output Clock 43 RXC DVI input 2 PW2300 PW2300 is front processing signal of integration highly performance multi system 3D video decoder and three highly velocity AD converter chip It supports HDTV NTSC PAL and SECAM Its analog port support 1080P 150MHz Internal Block Diagram PW2300 PINS FUNCTION Pin Name Function Pin Name Function A4 XIN Resonator input P1 R_2 AV2 red in...

Страница 17: ...T3 VGA_V VGA V sync signal E16 G_VS V SYNC output N1 R_1 AV1 red input F14 G_HS H SYNC output N1 G_1 AV1 greed input F15 G_AHS H SYNC of non processing N3 SOG_1 AV1 greed sync input G15 G_DLK Clock output N4 B_1 AV1 blue input GBE 0 7 blue even pixel data output GBO 2 9 Blue odd pixel data output GGE 0 7 greed even pixel data output GGO 2 9 greed odd pixel data output GRE 0 7 red even pixel data o...

Страница 18: ...urrent setting resistor for ramp generator 5 LINP Positive audio input for left channel 41 ROUTP Positive audio output for right channel 11 FAULT Volume control 44 ROUTN Negative audio output for right channel 5 DS90C387 The DS90C387 DS90CF388 transmitter receiver pair is designed to support dual pixel data transmission between Host and Flat Panel Display up to QXGA resolutions The transmitter con...

Страница 19: ...d into the transmitter at a maximum rate of 170MHz In this mode the transmitter provides single to dual pixel conversion and the output LVDS clock rate is 85MHz maximum The third mode provides inter operability with FPD Link devices Internal Block Diagram Pin Description No Pin name Description No Pin name Description 11 CLKIN Clock input 3 10 TTL Red data 54 HSYNC Horizontal sync 93 100 1 2 TTL G...

Страница 20: ...3D mono and bypass Each mode can be set by terminals Pin Description Pin Name Description Pin Name Description 1 Rin1 Right channel of audio input 9 VCC Power 2 Lin1 Left channel of audio input 10 MUTE Mute 5 Rout Right channel of audio output 11 SRS STEREO ON OFF SRS stereo switch 8 Lout Left channel of audio output 12 SRS MONO ON OFF SRS MONO switch ...

Страница 21: ...19 Internal Block Diagram ...

Страница 22: ...ck Diagram Pin description Pin Name Description Pin Name Description 5 PISIF IF of Sound input 25 R OUT Right channel of audio output 11 SDA I2C bus 26 LOUT Left channel of audio output 12 SCL I2C clock 31 VCC 9V supply power ...

Страница 23: ...21 8 R2SI5900SP Internal Block Diagram ...

Страница 24: ... left channel of audio 3 26 HDMI right left channel of audio 4 25 VGA right left channel of audio 5 24 YpbPr1 right left channel of audio 11 19 output the power amplifier right left channel of audio 9 M52797D Internal Block Diagram ...

Страница 25: ...t audio channel output 22 Right audio channel output 10 CM2006 Internal Block Diagram Pin description Pin Name Description Pin Name Description 1 VCC 3 3V 11 DDC_IN2 DDC _input2 3 4 5 VIDEO_1_2_3 Video input 12 DDC_OUT2 DDC output 6 GND GND 13 SYNC_IN1 Sync input1 7 Vcc DDC 5V DDC 14 SYNC_OUT1 Sync output1 8 BYP Bypass capacitance 15 SYNC_IN2 sync intput2 9 DDC_OUT1 DDC output 16 SYNC_OUT2 Sync ou...

Страница 26: ...603 X500 X604 X602 X603 X608 TUNER X601 X101 X401 X402 X8 X7 XA01 CN2 CN3 CN4 CN5 CN1 RS 232C HDMI VGA VGAAUDIO IN S VIDEO AC220 SPEAKER HEADPHONE KEYS BOARD REMOTE RECEIVER X602 X0 X605 X606 X601 X300 X700 X502 X501 LCD PANEL X604 CNF1 J1 CN2 CN1 YPBPR YPBPR AUDION IN AV IN AV OUT ...

Страница 27: ...nd if interfered possibly by the equipment like transmitting antenna non professional radio station and cellular phone 1 2 TV set Symptoms Possible cause Unable to switch the power on Check to see if the power plug has been inserted properly into the socket No picture and sound Check to see if the power supply of liquid crystal TV has been switched on As can be indicated by the red LED at the fron...

Страница 28: ... 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 fluorescence No picture and sound but only hash Check if the antenna cable is correctly connected or if it has received the video...

Страница 29: ...mm 10mm 5mm Total defected point 8 7 5 4 Notes 1 Definition of defected point bright spot dark spot It is identified as a defected point if its area exceeds 1 2 of a single picture element R G B 2 Definition of bright spot It is identified as a bright spot if it is bright in the state of dark field and its bright size remains unchanged 3 Definition of dark spot It is identified as a dark spot if i...

Страница 30: ...eck the 5V STB Cut off the the power board and video board to main board check it Power board problem Check the supply power D3 3V Short circuit the pin 1 STANDBY of X604 to 5V then check the supply power U24 abnormal Pull out P2 check power Check N501 and N601 Short circuit in a power line Power board problem Abnormal Abnormal Normal Abnormal Normal Check if the indicator is light Yes No Normal C...

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