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XOCECO LC-26U26, Service Manual

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Page: 29 / 41

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LVDS&BK

CPU board (page2 of 8)

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Summary of Contents for LC-26U26

Page 1: ...LCD TELEVISION LC 26U26...

Page 2: ...tions Alignment instructions Working principle analysis of the unit Block diagram IC block diagram Wiring diagram Troubleshooting Schematic diagram APPENDIX A Main assembly list APPENDIX B Exploded vi...

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 mod...

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...

Page 5: ...should be done under nature picture mode 3 1 Initialization Enter factory menu select Factory settings sub menu and adjustment for items of table1 Table1 sub menu adjustment Items Range Introduce PW...

Page 6: ...alance preset value of offset_R offset_G and offset_B to 125 and preset value of gain R gain G and gain B to 100 Adjustment for brightness let the second level brightness be 3nit at least c Fixed valu...

Page 7: ...ond bright to 3nit at least b Fixed value of offset B to 15 adjust offset_R and offset_G let the color coordinate of the second level be 285 and 293 and its brightness be 4 5nit more or less it can no...

Page 8: ...cted to HDMI interface through the use of a passive cable converter The main chip N101 MST6151 a multifunctional large scale specified integrated circuit board it has many kinds of function such as A...

Page 9: ...VI HDMI A L R BUS SCALER A D D A DEINTERLACER LVDS HDMI N101 CPU board MST6151DA VIDEO DECORDER N601 TVP5160 MCU N801 MM502 SDRAM N201 SDRAM N202 AUDIO PROCESSOR N801 MSP3425G AUDIO AMP N401 TPA3008D2...

Page 10: ...lter is also available On CVBS and Y C inputs the user can control video characteristics such as hue contrast brightness and saturation via an I2C host port interface Furthermore luma peaking with pro...

Page 11: ...9...

Page 12: ...10...

Page 13: ...tics of DG DP 920kHz beat and cross color Dynamic AGC realizes high speed response with only single filter Video IF and sound IF signal processings are separated from each other VCO output is used to...

Page 14: ...18 VGA H sync input 19 VGA V sync input 27 28 PB input 29 30 Y input 31 HDMI G input 32 33 PR input 54 61 CCIR656 format signal input 53 CLK input 164 171 174 4 difference signal output 160 161 1 clo...

Page 15: ...13 4 MSP3425G...

Page 16: ...14 5 TPA3008 FUNCTIONAL BLOCK DIAGRAM 1 MUTE 3 R input 5 L input 20 17 L input 41 44 R input 15 23 33 39 and 47 18V power supply...

Page 17: ...15 Wiring diagram Panel TV board CPU board main board Power supply board AV out board Speaker X903 X904 X2 X3 X8 X1 X10 X7 X2 X6...

Page 18: ...d 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 t...

Page 19: ...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 Che...

Page 20: ...m 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 Defi...

Page 21: ...board is normal Check STANDBY circuit of power supply board Press POWER button in the unit button and sensor control check the indicator Check if the PIN12 of X503 in CPU board is high level Check if...

Page 22: ...ROM then turn off the TV turn on again display picture Adjust CPU board again Which is no signal of channels Replace CPU board Check if 1VPP signal and noise wave of X2 PIN 1 in the TV board Check if...

Page 23: ...age of N401 is normal Check power supply Check PIN26 and PIN27 output wave of N801 Check PIN13 output wave of N101 Check PIN5 wave of Z102 Check PIN11 wave of TUNER1 Replace N401 Replace N801 Replace...

Page 24: ...AV OUT board...

Page 25: ...key board...

Page 26: ...667 L27U25 20 POWER BOARD...

Page 27: ...IR board...

Page 28: ...MCU CPU board page1 of 8...

Page 29: ...LVDS BK CPU board page2 of 8...

Page 30: ...POWER CPU board page3 of 8...

Page 31: ...SDRAM CPU board page4 of 8...

Page 32: ...TVP5160 CPU board page5 of 8...

Page 33: ...YPbPr AUDIO SWITCH CPU board page6 of 8...

Page 34: ...CPU board page7 of 8...

Page 35: ...CPU board page8 of 8...

Page 36: ...video board page1 of 2...

Page 37: ...video board page1 of 2...

Page 38: ...TPA3008D2 353 30080 10 CPU board 667 L26U26 56 N101 N601 NA01 N801 MST6151DA 353 61510 10 TVP5160 353 51600 10 CS4340 353 43400 30 MM502 353 05020 10 Audio switch board AV output board 667 L27U25 15...

Page 39: ...APPENDIX Exploded view LC 27X26...

Page 40: ...board assy 14 780 X26WH 120 Back cabinet 15 808 10981 120 Back cabinet cover right 16 808 10980 120 Back cabinet cover left 17 808 10982 120 Rotor cover 18 615 10675 2F0 Stand assy 19 615 20575 00 Spe...

Page 41: ...603 L26U260 10 Ver 1 0...

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