1. Manuals
  2. Brands
  3. XOCECO Manuals
  4. LCD TV
  5. LC-42T17
  6. Service manual

XOCECO LC-42T17 Service Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
LCD TELEVISION
LC-42T17
LC-47T17

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the LC-42T17 and is the answer not in the manual?

Questions and answers

Related Manuals for XOCECO LC-42T17

Summary of Contents for XOCECO LC-42T17

  • Page 1 LCD TELEVISION LC-42T17 LC-47T17...

  • Page 2: Table Of Contents

    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...

  • Page 3: Safety Precautions

    This service manual is only for service personnel to take reference with. Before Attention: servicing please read the following points carefully. Safety precautions 1. Instructions Be sure to switch off the power supply before replacing or welding any components inserting/plugging in connection wire Anti static measures to be taken (throughout the entire production process!): a) Do not touch here and there by hand at will;...
  • Page 4 would be unable to work and no way to get it repaired. 2.11 Special care must be taken in transporting or handling it. Exquisite shock vibration may lead to breakage of screen glass or damage to driving circuit. Therefore it must be packed in a strong case before the transportation or handling.

  • Page 5: Alignment Instructions

    Alignment instructions (LC-37T25& LC-42T17&LC-47T17) 1. Test equipment Digital multimeter, signal generator (54200) VG849 (HDMI signal generator) CA210 (White balancer) 2. The alignment flow chart (see below Fig.1) Write N105, N403, N607, N70, N606 To produce main board, TV board and other board...
  • Page 6 Enter the factory menu method: press “1”→ “9” → “7” → “9” button in the window menu state. Note: warm color temperature coordinate (285, 294); warm color temperature coordinate (284, 299). LC-42T17, LC-47T17 and LC37T25/T7 cool color temperature coordinate (270, 283). 3.5.1 HDMI channel a.
  • Page 7 283). n. Repeat the L and M step, until the third and the seventh level color coordinate (270, 283). 3.5.3 high definition channel a. Input the 720P SMPTE COLOR BAR signal (TIMING: 976, PATTERN: 984). b. Brightness to 50, contrast to 50. c.
  • Page 8 e. Enter the color temperature setup menu. Adjust the RED OFFSET, GREEN OFFSET, BLUE OFFSET, until the third level color coordinate (284, 299). g. Adjust the RED GAIN, GREEN GAIN, BLUE GAIN, until the seventh level color coordinate (284, 299). h.

  • Page 9: Working Principle Analysis Of The Unit

    table 2, check the picture and sound. Table 2 Component format signal H-frequency(kHz) V-frequency(Hz) signal 15.735 SDTV 480i 15.625 SDTV 576i 31.47 SDTV 483p 45.00 HDTV 720p 33.75 HDTV 1080i 28.13 HDTV 1080i 67.50 HDTV 1080p 56.25 HDTV 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.
  • Page 10 PW218 (N601), after the above process the finally selected way will be set to X300 earphone socket after under the control of volume, treble and bass which is finished by R2S15900 (N301), the earphone socket has the switching function, when earphone is plugged, sound will be sent to earphone amplifier NJW1109 (N302), then sent back to earphone socket after power amplification.

  • Page 11: Block Diagram

    Block diagram YPbPr1 PC Audio HDMI Audio RF Audio TPA3008D2 LA72700V Tuner STERO/SAP decoder SRS processor MEGAL8 M62494 RF Video NJW1109 N400 Earphone M52797SP R2S15900 socket of Audio and video YPbPr2 with switch switch AV Audio Out Flash YPbPr1 PW2300 V port PW2300 YPbPr2...

  • Page 12: Ic Block Diagram

    IC block diagram 1. AD9880 and AD9398 AD9880 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 PIN configuration AD9880 (AD9398) PINS FUNCTIONS Name Function Pin Name Function GGE(0-7) Converter output RXC+ DVI input 12-19 GBE(0-7) Converter output DDC_CLK HDCP Slave Serial Port Data Clock 92-99 GRE(0-7) Converter output DDC_DATA HDCP Slave Serial Port Data 20, 21 MCLK Control clock output HDCP Master Serial Port Data Clock...
  • Page 14 I2S_SD Bus audio data output SDA_1 Serial Port Data I/O RX0- DVI input G_FIEL0 Odd/Even Field Output RX0+ DVI input G_VS VSYNC Output Clock RX1- DVI input G_VHS Sync Green Slicer Output RX1+ DVI input G_HS HSYNC Output Clock RX2- DVI input G_DE Data Enable...
  • Page 15 I2Cbus clock AV2 blue input VGA-R1 VGA(red) CVBS_1 TV composite video signal input VGA-G1 VGA(greed) S-VHS brightness signal input VGA-SOG1 VGA(greed sync signal) CVBS_SOG1 TV composite video signal greed sync input VGA-B1 VGA(blue) S-VHS chrominance signal input VGA_H VGA(H-sync signal) GVBI Vertical blanking blank VGA_V...
  • Page 16 4. TPA3008 TPA3008 is double channel 10W stereo D class audio amplifier. Internal Block Diagram PINS FUNCTION Name Function Name Function SHUTDOWN Shut down control signal LOUTN Negative audio output for left channel RINP Positive audio input for right channel LOUTP Positive audio output for left channel V2P5...
  • Page 17 FPD-Link devices. Internal Block Diagram Pin Description Pin name Description Pin name Description CLKIN Clock input 3-10 Red data HSYNC Horizontal sync 93-100, 1, 2 Greed data YSYNC Vertical sync 85-92 Blue data...
  • Page 18 Pin Diagram 6. M62494 (SRS 3D Stereo + SRS 3D Mono processor) M62494 has SRS 3D STEREO and SRS 3D MONO. There are three modes, those are SRS 3D stereo SRS 3D mono and bypass. Each mode can be set by terminals. Pin Description Name Description...
  • Page 19 Internal Block Diagram...
  • Page 20 7. L72700 Internal Block Diagram Pin description Name Description Name Description PISIF Sound R OUT Right channel of audio output input I2C bus LOUT Left channel of audio output I2C clock 9V supply power...
  • Page 21 8. R2SI5900SP Internal Block Diagram...
  • Page 22 PIN description 2, 27 right/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 Pin description Name Description Name Description HD2_L Audio input HD2_R Audio input AV1_L Audio input AV1_R Audio input AV2_L Audio input AV2_R Audio input TV_L Audio input TV_R Audio input Left audio channel output Right audio channel output 10.CM2006 Internal Block Diagram Pin description Name Description...

  • Page 24: Wiring Diagram

    Wiring diagram 782-LYT25-0100 RS-232C CNF1 HDMI LCD PANEL KEYS BOARD VGA AUDIO IN X3（12） X603 REMOTE RECEIVER SPEAKER X500 X604 X602 X603 YPBPR 782-LYT25-5500 YPBPR AUDION IN SUPPLY POWER S-VIDEO AV IN AV OUT TUNER HEADPHONE AC220...

  • Page 25: Troubleshooting

    Trouble shooting 1. Fault clearance Before servicing please check to find the possible causes of the troubles according to the table below. 1.1 Antenna (signal): Picture is out of focus or jumping Bad status in signal receiving Poor signal Check if there are failures with the electrical connector or the antenna.
  • Page 26 signal types. Picture too bright and there is Check if the contrast setting is too high. distortion in the brightest area Possibly the output quality of DVD broadcaster is set too high. It maybe also due to improper terminal connection of the video frequency signal in a certain position of the system.
  • Page 27 2. Identification criteria for the bright spot and dark spot of the LCD screen Quantity allowed Distance between two spots Category Criteria 15" 20" 22" 30" 40" 15" 20" 22" 30" 40" One single ≤5 ≤2 ≤5 ≤2 ≤3 spot Bright ≥15mm spot...
  • Page 28 3. Troubleshooting guide 3.1 No raster, no picture and no sound Check if the indicator is light Check supply Check 5V-STBY power D3.3V Abnormal Normal Cut off between the power board and signal processing, Short circuit the pin 1 (STANDBY) Check N501 and check the 5V-STB of X604 to 5V, then check the...
  • Page 29 2.With sound but no picture: With sound but no picture Display LOGO? Check if no image for all other channels Check if the X3, signal wave? Check if the white Check program balance of the factory menu is normal? Unfix X3 and X4, turn on the unit display the white screen Normal Abnormal...
  • Page 30 3.With picture but no sound. With picture but no sound If there is output from X700 of sound power amplification board Check if input signal in pin 2 of sound Sound box damaged power amplification Sound power amp. or other peripheral circuit Measure if the sound input of the have problem.
  • Page 31 5. High frequency board overhaul flow 5.1 with picture but no sound Check if other channel is normal Check if the earphone is normal Check the connection cable Normal Check if the sound channel Check if the connection of N400 is normal cable and power cable is speaker normal...
  • Page 32 5.2 A certain channel without picture of TV/AV YPBPR Check if the VGA and HDMI has same problem Check the main board Check the connection cable and signal source is normal Normal YPBPR channel Check if the X600 socket is Check if the supply power normal (5v, 9v and 12v) is normal...

  • Page 43: Appendix: Main Assembly List

    SL37T70-01B10 software 37T7mega8 SL37T70-01C10 software 37T7HDMIEDID SL37T70-01D10 software 37T7VGAEDID SL42T170-13A10 software 42T17 335-42008-00 LCD panel 203-L42T170-14 100-L42T170-14 LC-42T17 301-IL37T25-04C RC-I04-0C remote control (ME) 535-L42T17-00 hanging assemble 615-10626-00 stand ASS'Y (DZ-1642S） 615-20548-00 SPEAK ASS'Y 667-L37T7-01 MAIN PCB ASS'Y 667-L42K17-20 POWER PCB ASS'Y (42"CMO)
  • Page 44 SL37T70-01C10 software 37T7HDMIEDID SL37T70-01D10 software 37T7VGAEDID SL42T170-12A10 software 42T17OSD 335-42008-00 LCD panel 203-L42T170-15 KEY1 HDCP 100-L42T170-15 LC-42T17 301-IL37T25-04A RC-I04-0A remote control PRIMA 535-L42T17-00 hanging assemble 615-10626-00 stand ASS'Y (DZ-1642S） 615-20548-00 SPEAK ASS'Y 667-L37T7-01 MAIN PCB ASS'Y 667-L42K17-20 POWER PCB ASS'Y (42"CMO)
  • Page 45 535-L47T17-00 hanging assemble 615-10554-00 stand ASS'Y (DZ-1647) 615-20459-00 speaker ASS'Y ( LEFT) 615-20460-00 speaker ASS'Y ( RIGHT) 667-L37T7-01 MAIN PCB ASS'Y 667-L42T17-09 IR RECEIVE ASS'Y 667-L42T17-55 high frequency BOARD ASS'Y 667-L47K17-20 POWER PCB ASS'Y (47"CMO) 667-L47T17-05 KEY BOARD ASS'Y KEY1 HDCP SL37T70-01B10 software 37T7mega8...
  • Page 46 603-L42T17X-XX 603-L47T17X-XX Ver.1.0...

This manual is also suitable for:

Lc-47t17

Table of Contents