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Related Manuals for XOCECO LC-32FC18
Summary of Contents for XOCECO LC-32FC18
- Page 1 LCD TELEVISION LC-32FC18 America...
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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-A: Assembly list APPENDIX-B: Exploded View... -
Page 3: Safety Precautions
Attention: This service manual is only for service personnel to take reference with. Before 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. If the connection wires, connectors or components fixed by the thermotropic glue need to disengage when service, please soak the thermotropic glue into the alcohol and then pull them out in case of dagame.
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Page 5: Alignment Instructions
Alignment instructions 1. Test equipment Digital Multi-meter 54200 (Signal generator) PC (FLASH writing programs have to be installed first, W24CXX.EXE) VG849 (HDMI signal generator) CA210 (White balancer) DVD player (with HDMI output) Monitor 2. The alignment flow chart (see below figure) FLASH write N501, N142, N710, N801 Production of main board, high frequency board, other little board power board on the line... - Page 6 3. Flash writing programs Connect the digital board, analog board, trans-connect board and power board according the wiring diagram. Flash write N710, N711 a) Flash write W24CXX.EXE to N710, N711 with self-made flash write tool on the line. b) Upgrade software from USB interface. Note: N710, N711 may upgrade from HDMI and VGA interface respectively.
- Page 7 4.4.2 Adjustment of white balance Input HDMI signal and check the white balance at HDMI channel. a) Enter “color temperature setting” menu, select “color temperature” of “NORMAL”. b) Input 16-level gray signal of the mode 1024*768 @60HZ (TIMING:856, PATTERN:921). c) Fix BLUE GAIN at 1000, adjust RED GAIN, BLUE GAIN to set the color coordinates fourteenth level to (X=285, Y=293).
- Page 8 5.5 HDMI terminal HDMI signal format receive the three high-definition signals: 480P/60Hz, 720P/60Hz, 1080I/60Hz, except for the table 2 signal. Check if the image (contain HDCP ON and OFF) and sound is normal. Select any a kind of suitable signal and check if the sound is normal when change the sampling frequency of the sound (32K/44.1K/48K).
- Page 9 D-SUB Vivid Standard Mild Custom Contrast Brightness Saturation Tint Sharpness HDMI Vivid Standard Mild Custom Contrast Brightness Saturation HDMI Vivid Standard Mild Custom Tint Sharpness Note: in the status of factory (P2), it can change the settings of the preset picture and sound modes;...
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Page 10: Working Principle Analysis Of The Unit
Working principle analysis of the unit 1. Starting of the system The system adopts 264MHz, 32bit MIPS CPU of Linux operating system. It needs bootstrap routine to start the unit after power-on, which stored in N142 (serial Flash in the block diagram). After bootstrap routine finish, start the Linux operating system and application programs from N141 (Nand Flash). -
Page 11: Block Diagram
Block diagram Serial FLASH NAND FLASH YPbPr1 HDTV SW. 512K 16/32M YPbPr2 PI5V330 DDR SDRAM 32/64/128M RECEIVER LCD TV RGB/YCbCr 24Bit RS-232 AD9880 CONTROLLER I2SII (HDMI) HDMI SPDIF X240H AV1/S LVDS Digital IF 24Bit THC63LVDM83R TUNER CVBS BKL Control BKL-EN PANEL VIDEO SW. -
Page 12: Ic Block Diagram
IC block diagram 1. X240H Block diagram is below: Function of X240H: 1) Decoder of VSB/QAM, control of TUNER 2) 264MHz, 32bit MIPS CPU 3) MPEG decoder and format switch of HD and SD 4) NTSC Video Decoder with 3D Comb 5) USB 1.1 interface 6) Two I2S input/output 7) S/PDIF output... - Page 13 2. AD9880 The AD9880 offers designers the flexibility of an analog interface and High-Definition Multimedia Interface (HDMI) receiver integrated on a single chip. Also included is support for High bandwidth Digital Content Protection (HDCP). Main pins instruction: 83, 84: SCL, SDA 49, 50: DDCSCL, DDCSDA, connect with E2PROM (store EDID) and external HDMI 51, 52: MCL, MDA, connect with E2PROM (store HDCP KEY) 66, 71, 77: R, G, B input for VGA...
- Page 14 3. MSP4440G Main pins instruction: 2, 3: SCL, SDA 27, 28: left-right audio of audio power amplification 24, 25: left-right audio of earphone 36, 37: left-right audio of AV OUT 67: SIF input of TV 4. THC63LVDM83R The THC63LVDM83R transmitter converts 28bits of CMOS/TTL data into LVDS (Low Voltage Differential Signaling) data stream.
- Page 15 5. TPA3008D2 The TPA3008D2 is a 10-W (per channel) efficient, class-D audio amplifier for driving bridged-tied stereo speakers. The TPA3008D2 can drive stereo speakers as low as 8Ω. The high efficiency of the TPA3008D2 eliminates the need for external heatsinks when playing music. The gain of the amplifier is controlled by two gain select pins.
- Page 16 Block diagram of TPA3008D2:...
- Page 17 Pin description:...
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Page 18: Wiring Diagram
Wiring diagram... -
Page 19: 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 20 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 21 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 22 3. Troubleshooting guide Connect the power Check Power supply, infrared board and power cord. Check if L508 is rosin joint or short to the ground. A red indicator lights? Yes, turn the unit on Check if Z801, N801 and V582 are normal A blue indicator lights? Check backlight board, DDR, N141, N142, G601 Does backlight light up...
- Page 23 3.1 No raster, no picture and no sound No raster, no picture and no sound Is the power indicator lights? Is the blue indicator Check Standby5V lights? Normal Abnormal Check Z801, Check DDR, N141, Disconnect the power supply board N801 and V582 N142, G601 with the data processing board, and...
- Page 24 2.2 No picture but with sound (blue screen and OSD appear) No picture but with sound Whether backlight lights up. Check if other channels Check backlight board, have no picture R748 is low level or not Check N1 and its Refer to (4) checking periphery procedure...
- Page 25 3.4 No sound but with picture No sound but with picture Check if XV02 has output Speaker fails to work Check if correspondent pins of power amplifier have output Check periphery circuit Check there have signals power amplifier’s inputted from R207 and R208 to back level power amplifier Check if correspondent...
- Page 26 3.5 A certain channel fails to work properly a) AV/S-terminal with no picture Check if C440 or C441 has input signal Check if C861 or C862 has Check periphery circuit of N101, input signal crystal oscillation and power supply circuit Check periphery circuit of There exits problems at the V805 or V808 and power...
- Page 27 c) D_Sub with no picture Check if the input signal of YPbPr is normal There is trouble at the path Check periphery circuit of between VGA socket and N502. N502 and I2C bus of R606, R607 d) YPbPr with no picture Check if the input signal of VGA is normal There is trouble at the path...
- Page 28 Digital program can’t be received Check crystal oscillation of G602 and the soldering of L405, C417, R822, R823, C419 and C420. check each power supply. g) HDMI with no sound Check if R509 and R510 output square-wave, and check if R505 has signal or not. 3.5 Abnormal picture a) A certain differential wire pair of LVDS of X561 (RX0+/-, RX1+/-, RX2+/-, RX3+/-) is abnormal, which may lead to lack of color or color splash.
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Page 29: Schematic Diagram
CPU board... - Page 30 CPU board...
- Page 31 CPU board...
- Page 32 CPU board...
- Page 33 CPU board...
- Page 34 CPU board...
- Page 35 CPU board...
- Page 36 CPU board...
- Page 37 CPU board...
- Page 38 CPU board...
- Page 39 AV trans-connect board...
- Page 40 analog board...
- Page 41 32" power board 667-L32T18-20...
- Page 42 Main assembly (LC-32FC18) NAME MAIN COMPONENT AND it’S NO. N201 MSP4440G (353.44400-20) Analog board 667.L32FC18-53 NV01 TPA3008D2 (353.30080-10) N561 THC63LVDM83R (353.00830-10) Digital processing board 667.L32FC18-69 N502 AD9880KST-100 (353.98800-20) X240H (353.02400-10) Trans-connect board 667.L32FC18-46 Keypad board 667.27FC18-05 Indicator light board 667.L32W18-14A IR board 667.L32W18-09...
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Page 43: Appendix-B: Exploded View
APPENDIX: Exploded view (LC-32X18) - Page 44 PART LIST OF EXPLODED VIEW (LC-32X18) No. PART NO. DESCRIPTIONRE 808-20332-202 ACTIVE panel 780-G18L0-AW1 Front cover 870-30190-00 LED columnbracket 360-30042-00 Power switch 700-60256-00 LED column 700-60255-100 LED column Infrared receiving board assy Screen 615-10562-00 LCD screen fixed mount assy Power board assy Sound trans-connecting assy 870-10219-00 Mounting holder...
- Page 45 603-L32FC18-14 Ver.1.1...
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