XOCECO LC-42HW36, Service Manual

Page 1: ...LCD TELEVISION LC 42 47HW36 ...

Page 2: ...instructions Method of software upgrading Working principle analysis of the unit Block diagram IC block diagram Wiring diagram Troubleshooting guide Schematic diagram APPENDIX A Assembly list APPENDIX B Exploded View 1 3 9 11 12 13 23 24 32 ...

Page 3: ...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 once Likewise if th...

Page 4: ...20 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 dis...

Page 5: ...y menu Press the SLEEP button to select the adjustment page menu press and to select item press and Check if DDC and FLASH are flash written To produce digital board and analog board All testing White balance adjustment Connect with central signal source then check each function of TV such as station leaking analog control etc check the output of headphone and speaker Input AV SVIDEO signal then c...

Page 6: ... If there is some deviation in some channel please adjust it independently Note after adjust the white balance in HDMI it will store the adjusted data to other channels 4 Performance check 4 1 TV function Connect RF TV terminal to the central signal source and enter the setting menu set the country category then enter the search menu auto search check if there is station skipping Check the manual ...

Page 7: ...ield perform manual correction of the SCREEN menu Open the PIP mode connect the earphone and check if the image and sound is normal Input DVI audio signal and check if it is normal Table2 VGA signal format No Resolution H frequency kHz V frenquency Hz Point clock pulse frenquency MHz Remark 1 720x400 31 469 70 086 28 322 IBM 2 640x480 31 469 59 94 25 175 IBM 3 640x480 37 861 72 809 31 5 VESA 4 640...

Page 8: ... AIS_ADC_GAIN 05H Main pic Hp F6H HP VOLUME SETTING Volume 1 50H Volume 25 ABH Volume 50 B9H Volume 75 C7H Volume 100 D6H Table5 Factory Video Limit Setting Item CVBS D SUB YPbPr HDMI Brightness Min 80H 60H 70H 70H Brightness Mid 90H 80H 85H 90H Brightness Max B0H A0H A0H B0H Contrast Min 50H 70H 50H 50H Contrast Mid 70H 90H 70H 70H Contrast Max 85H B0H 85H 85H Sharpness Min 40H 40H 40H 40H Sharpn...

Page 9: ...8 B Offset 121 121 121 121 R Gain 123 123 123 123 G Gain 128 128 128 128 B Gain 126 126 126 126 Color Temperature Cold R Offset 118 118 118 118 G Offset 128 128 128 128 B Offset 126 126 126 126 R Gain 141 141 141 141 G Gain 128 128 128 128 B Gain 95 95 95 95 Color Temperature Warm Table7 Picture Setting CVBS Dynamic Standard Mild Custom Contrast 90 80 50 50 Brightness 60 50 40 50 Colour 70 60 40 5...

Page 10: ...ed value will be store in Custom mode Table8 Audio Setting User Surround Music Movie Treble 50 50 80 60 Bass 50 50 80 80 4 8 Ex factory setting of user menu 1 select TV channel 2 video menu Mode Standard colour temperature nature 3 audio menu Volume 20 Balance 00 Earphone volume 20 Mode user BBE off AVC off 4 screen menu Mode Auto 5 station menu Color mode Auto Sound mode DK 6 setting menu Child L...

Page 11: ...rminal VGA cable 665 D0002 510 with pin4 and pin11 3 Upgrade method when the unit is normal a Click ISPWRITER3 icon on the desk to open the upgrade software click OPEN of the tool bar to begin communication enter the factory menu and select Enter Update Mode of the first OSD page to enter the upgrade mode b Click BIN of the tool bar and select the upgrade software click PROG on the tool bar to beg...

Page 12: ...pgrade method when the unit can t power on normally Click ISPWRITER3 icon on the desk to open the upgrade software click OPEN on the tool bar to begin communication then click DIAL on the tool bar to test the state of the unit power on the unit now to enter the upgrade automatically then perform according 3 4 6 Reboot 1 OPEN 2 DIAL ...

Page 13: ...signal of S Video and AV1 video share the same channel USB or YUV signal of PVR mode and D SUB signal via matched resistance the signal separately through alone channel send to main IC NS01 SVP WX68 video switch A D transition digital decode image scale and OSD superposition then send to LVDS level drive for LCD screen Video signal of YPbPr1 YPbPr2 via matched resistance to video switch NB05 PI5V3...

Page 14: ...12 Block diagram ...

Page 15: ...ignal via matched resistance the signal separately through alone channel send to main IC NS01 SVP WX68 video switch A D transition digital decode image scale and OSD superposition then send to LVDS level drive for LCD screen It can realize the functions of PIP POP and Multi window in N101 32bit 256MHz ...

Page 16: ...effect processing then separate to left and right channel and send to digital sound amplifier N106 TPA3210 amplifying then send to speaker one way also separate to left and right channel and send to earphone amplifier N104 NJW1109 for volume control and amplify then send to earphone socket the other way send to AV OUT Pin Description 92 93 SDA SCL 37 38 left right channel output to sound amplifier...

Page 17: ...er amplifier Pin Description Pin Description 2 Standby control signal input 17 18 Gain select for audio output 4 Mute signal input 15 22 Audio output for left right channel 5 6 Audio input for left right channel 13 14 Power ground 8 9 Analog ground 19 20 Power ...

Page 18: ...coding witch supports MPEG 1 MPEG 2 MPEG 4 format It has dual USB2 0 high speed OTG ports that connect to digital camera MP3 player and other electric device The AML7213 receives IR signal and supports YPbPr720P output and is used for CRT LCD PDP portable media players etc To printer ...

Page 19: ...are if YES check if the upgrade software matches to the main IC because the three kinds of versions of AML3428 AML3278 and AML7213 are not compatible The module can t work correctly with wrong version software and it can t upgrade the software through the USB port You should unsolder FLASH and flash write the new software through the flash write instrument Make sure the software is right and then ...

Page 20: ...another way via semi bridge circuit TEA1610T output 24V 18V etc At standby power board send out Vsb 3 3V to cut off 5VSC 32VSC output by the control of Standby signal and stop working of PFC circuit L6563 and semi bridge TEA1610T When turn Check the back level circuit of IC output short or joint soldering N1 is abnormal replace it when the power supply is normal Check if NU8 5 8 output sound signa...

Page 21: ... IC working and output voltage L1653 PFC power factor correct TEA1610T Isolation D D convert 400VDC converted to DC 24V 18V etc FSDH321 Isolation D D convert 400VDC converted to DC 5V 32V etc FSDH321 block diagram is bellow ...

Page 22: ...20 L6563 block diagram is below ...

Page 23: ...21 ...

Page 24: ...22 TEA1610T block diagram is below ...

Page 25: ...in pin pin pin pin pin pin pin pin side key board option power power power board backlight control touch key IR key video video video interface power board amplifier power speaker port real time clock control adjust sensor audio audio side earphone audio of video board pin pin side AV board socket pin amplifier power backlight power pin pin main board power of analog circuit pin pin pin video audi...

Page 26: ...PROM No No Yes turn the unit on Panel is light on No Check the backlight board CPU 72 backlight control Yes Yes Check if the picture of each channel is normal No Check the signal inputted from the channel to pin IC or IC and its peripheral circuit or the output of LVDS is normal Check if the sound of each channel is normal No Check if the signal inputted from the channel to pin IC is normal or IC ...

Page 27: ...em Check if the indicator is blue Check CPU N801 FLASH N802 power supply No raster no picture no sound Indicator is on Yes Indicator is off No Abnormal Normal Abnormal Normal Check periphery of L801 CPU and FLASH Check if CPU 10 reset pin is high level Yes No Check if N801 42 N802 26 is square wave Check N801 and its reset circuit if CPU is reset correctly Yes No Check N801 crystal and N806 Check ...

Page 28: ...02 and N803 besides check the weld of the components you may test the pins of the resistance row connect N801 N802 and N803 with oscillograph if the square wave is abnormal it indicates that one of them N801 N802 N803 works abnormally and the SDL SCL is error N802 in all probability If RS51 RS52 connect N801 and NS01 is error it will also cause the phenomena of no raster no picture and no sound 2 ...

Page 29: ... With sound and raster Check if the signal output form NS01 to XS01 is normal Check if pin 2 4 is low voltage Abnormal Normal Check if LVDS power supply is normal LVDS receiver board has problem Check NS01 power supply and its periphery Abnormal Normal Check N402 Check N801 71 and its invert circuit No Yes Check if R162 R165 input signal to the power amplifier Check if N103 has signal input No Yes...

Page 30: ...k periphery circuit of NS01 crystal and power supply The path from AV1 terminal to NS01 has problem Yes No Check if the CS10 and CS16 input the signal Check periphery circuit of NS01 crystal and power supply Yes No Check if the C1S15 have the signal input Check if the pin12 of TUNER1 has output signal Check periphery circuit of NS01 crystal and power supply Check the periphery circuit of TUNER1 po...

Page 31: ...input Check the channel between NB05 and NS0l The channel between YPBPR socket and NB05 has problem Check the peripheral circuit of NB05 and power supply No Yes Yes No No Yes Check if CS12 CS13 CS14 have signal input Is there SYN signal output from NS01 U10 V10 Check the circuit between VGA socket and NS01 Yes No Yes No Check NS01 Check if the Pin1 5 of NB01 have sync signal input Yes No Check the...

Page 32: ...rder to display HDMI audio properly especially when use the DVD with HDCP information first make sure to flash write NA01 NA02 NA03 DDC chip of HDMI interface accurately and the bus line between NA01 NA02 NA03 NA04 and HDMI is well Check if NA04 has digital signal output Check if NA04 has digital signal input Check the peripheral circuit of NS01 crystal and power supply Yes No Check the periphery ...

Page 33: ...d rectifier No DC output Vsb normal Check 32VSC 5VSC No Check if Standby is high level Yes Check if 24VCF 24VSC 18VSC is normal Yes No Check N504 and the correlative circuit Yes Check the fore circuit No Check the correlative circuit of standby Check if the voltage of C533 is about 395V less than 370V is abnormal Yes No Check L6563 and its periphery include the VCC Check N512 and its periphery inc...

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Page 48: ...Panel 5203428504 NAME NO Main board 6HW0090110 NS01 N103 N106 SVP WX68 5270068001 SGTV5830 5275830002 TPA3120 5273120001 USB card reader 6LR0381610 N1 AML7213 5277213001 Touch key board 6HW0010510 IR board 6HW0020910 Interface connection board 6HW00229R0 Side connection board 6HW0032910 Side USB board 6HW01229A0 Power board 6HW00220R0 Remote control 6010J01402 Panel 5203478503 RC J14 0B V470H1 L03...

Page 49: ...APPENDIX Exploded view LC 42X36 ...

Page 50: ...board frame 15 high frequency board 16 main board 17 key board 18 AV baffle left 19 back cabinet 20 back cover 21 stand 22 speaker 23 side AV conncetion board 24 AV baffle right 25 interface baffle 26 interface board 27 power board frame 28 USB board 29 panel fixed bracket 30 panel connection 31 panel connection 32 IR board 33 fixed board right 34 decorative bar 35 front cabinet decorative bar 36 ...

Page 51: ...APPENDIX B Exploded view LC 47X36 ...

Page 52: ...cket down 16 column bracket 17 baffle 18 power board 19 terminal baffle 20 SCART connection board 21 video processing board 22 back cover 23 stand 24 back cabinet 25 main board 26 DVB T digital board 27 wall mounting bracket 28 digital board bracket 29 panel fixed bracket top 30 panel fixed bracket left 31 panel connection bracket 32 key board 33 front cabinet fixed bar lfet 34 front cabinet fixed...

Page 53: ...9242HW3614 Ver 1 0 ...