XOCECO LC-42T17 Service Manual Download

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CONTENTS

Safety precautions………………………………………………………………………..…

Alignment instructions …………………………….…….…………………………….…

Working principle analysis of the unit……………………………….………….………….

Block diagram…………………………………..……………………….…………

IC block diagram………………………………………………………………………..……

Wiring diagram ……………………………………………………………………………..…

Troubleshooting………………………………………………………………..……

Schematic diagram …………………………………………………………………….…..

APPENDIX: Main assembly list

Summary of Contents for LC-42T17

Page 1: ...LCD TELEVISION LC 42T17 LC 47T17 ...

Page 2: ... Safety precautions Alignment instructions Working principle analysis of the unit Block diagram IC block diagram Wiring diagram Troubleshooting Schematic diagram APPENDIX Main assembly list 1 3 7 9 10 22 23 31 ...

Page 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...

Page 4: ... 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 displaying still picture in high brightness for a long time 3 Points for attention during installation 3 ...

Page 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...

Page 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...

Page 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...

Page 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 ...

Page 9: ...ay etc sub CPU OSD searching channels image effect adjustment buttons control infrared remote control etc the sub CPU is ATMEGA8L N606 it is used to control power supply including standby and turning on the unit by using remote control etc The two MCU correlates with each other through pin 14 INT interruption of ATMEGA8L pin 28 and 29 SDA SCL The unit has one integrative tuner including HF and IF ...

Page 10: ...ronous signals outputted by PW2300 will then be sent to PW218 N601 HDMI signal will also be sent to AD9398 N101 to de decoding and output 24bit digital RGB signal as well as some corresponding synchronous signal which will be sent to PW218 N601 PW218 is a new generation chip of Pixelworks which has ability to deal with images 24bit digital RGB signal and some corresponding synchronous signals outp...

Page 11: ...8 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 ...

Page 12: ...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 ...

Page 13: ...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 ...

Page 14: ...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...

Page 15: ...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...

Page 16: ...7 DS90CF388 transmitter receiver pair is designed to support dual pixel data transmission between Host and Flat Panel Display up to QXGA resolutions The transmitter converts 48 bits Dual Pixel 24 bit color of CMOS TTL data into 8 LVDS Low Voltage Differential Signalling data streams Control signals VSYNC HSYNC DE and two user defined signals are sent during blanking intervals At a maximum dual pix...

Page 17: ... 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 Greed data 55 YSYNC Vertical sync 85 92 TTL Blue data ...

Page 18: ...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 ...

Page 19: ...17 Internal Block Diagram ...

Page 20: ...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 ...

Page 21: ...19 8 R2SI5900SP Internal Block Diagram ...

Page 22: ... 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 ...

Page 23: ...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...

Page 24: ...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 X6 X605 X606 X601 X300 X700 X502 X501 LCD PANEL X604 CNF1 J1 CN2 CN1 YPBPR YPBPR AUDION IN AV IN AV OUT ...

Page 25: ...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...

Page 26: ... 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...

Page 27: ...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...

Page 28: ...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...

Page 29: ... X3 X4 is signal wave Unfix X3 and X4 turn on the unit display the white screen Check input signal of N601 and power supply Check the supply power 120 of backlight board N601 damaged Check N201 and the circuit of output part Reset the EEPROM Yes No Yes No Normal Abnormal Normal Abnormal Normal Abnormal Normal Abnormal Yes No The supply power board damaged Check the N201 and peripheral circuit ...

Page 30: ...ent channel corresponding to N400 is normal R2S15900 or other peripheral circuit have problem Check different levels of circuit following input audio signal channel No Yes Check if pin 7 AV1 and pin10 AV2 has signal input Check if the pin1 of X4 has signal output There is problem from Av socket to N102 channel Check the N201 and peripheral circuit N400 or other peripheral circuit have problem PW23...

Page 31: ...und channel Check if the sound channel of N400 is normal Check if the earphone is normal Check the connection cable No Yes R2S15900 and peripheral circuit and earphone socket have problem Normal Yes No No Check if the connection cable and power cable is normal The speaker has problem Yes Yes No Check the audio power amplifier and peripheral ...

Page 32: ...mal Check the main board Check if the X600 socket is normal Check the YPBPR input circuit No Yes Normal YPBPR channel AV TV S channel Check if the X600 socket is normal No Check the supply power Check the main board No No Yes Yes Check the all levels circuit of S terminal channel S terminal channel AV TV channel Check if the input pin of N400 has signal No Check the M52797 and peripheral circuit Y...

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Page 34: ...C o n f i d e n t i a l C o n f i d e n t i a l ...

Page 35: ...C o n f i d e n t i a l C o n f i d e n t i a l ...

Page 36: ...C o n f i d e n t i a l C o n f i d e n t i a l ...

Page 37: ...C o n f i d e n t i a l C o n f i d e n t i a l ...

Page 38: ...C o n f i d e n t i a l C o n f i d e n t i a l ...

Page 39: ...C o n f i d e n t i a l C o n f i d e n t i a l ...

Page 40: ...C o n f i d e n t i a l C o n f i d e n t i a l ...

Page 41: ...C o n f i d e n t i a l C o n f i d e n t i a l ...

Page 42: ...C o n f i d e n t i a l C o n f i d e n t i a l ...

Page 43: ...INC4218 301 CPS42D8 14A RC C14 0A remote control INSIGNIA 615 10626 00 stand ASS Y DZ 1642S 615 20456 01 speaker ASS Y LEFT 615 20457 01 speaker ASS Y RIGHT 667 L37T7 01 MAIN PCB ASS Y 667 L42K17 20 POWER PCB ASS Y 42 CMO 667 L42T17 05 KEY BOARD ASS Y 667 L42T17 09 IR RECEIVE ASS Y 667 L47T17 55 high frequency BOARD ASS Y KEY1 HDCP SL37T70 01B10 software 37T7mega8 SL37T70 01C10 software 37T7HDMIED...

Page 44: ...equency BOARD ASS Y SL37T70 01B10 software 37T7mega8 SL37T70 01C10 software 37T7HDMIEDID SL37T70 01D10 software 37T7VGAEDID SL42T170 15A10 software 335 42008 00 LCD panel 203 L42T170 17 100 L42T170 17 FLM 4201 301 DL42T17 02A RC D02 0A remote control POLAROID 535 L42T17 00 hanging assemble 615 10626 00 stand ASS Y DZ 1642S 615 20548 00 SPEAK ASS Y 667 L37T7 01L MAIN PCB ASS Y 667 L42T17 05 KEY BOA...

Page 45: ...T7VGAEDID SL47T170 13A10 software CMO47 335 47001 00 LCD panel 207 LM47T170 10 100 LM47T170 10 FLM 4701 301 DL42T17 02A RC D02 0A remote control POLAROID 615 10554 01 stand ASS Y DZ 1647 615 20459 00 speaker ASS Y LEFT 615 20460 00 speaker ASS Y RIGHT 667 L37T7 01A MAIN PCB ASS Y 667 L42T17 09 IR RECEIVE ASS Y 667 L42T17 55A high frequency BOARD ASS Y 667 L47T17 05 KEY BOARD ASS Y 667 L47T17 20 PO...

Page 46: ...603 L47T17X XX Ver 1 0 603 L42T17X XX ...

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