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  4. LC-32FC18
  5. Service Manual

XOCECO LC-32FC18 Service Manual

Manual is about: Xoceco LC-32FC18 LCD TV Service manual

Summary of LC-32FC18

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    Lcd television lc-32fc18 america.

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    Contents safety precautions………………………………………………………………………..… alignment instructions …………………………….…….………………………………… working principle analysis of the unit……………………………….………….…………. Block diagram …………………………………..………………………………….………… ic block diagram………………………………………………………………………..…… wiring diagram ……………………………………………...

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    1 safety precautions 1. Instructions be sure to switch off the power supply before replacing or welding any components or 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; b) be sure to ...

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    2 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. 2.11 special care must be taken in tr...

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    3 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) fig.1 f...

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    4 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 ...

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    5 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 r...

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    6 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 s...

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    7 d-sub vivid standard mild pro custom contrast 30 25 20 30 25 brightness 20 25 20 30 25 saturation 30 25 20 26 25 tint 25 25 25 25 25 sharpness 25 25 25 30 25 hdmi vivid standard mild pro custom contrast 30 25 20 30 25 brightness 20 25 20 30 25 saturation 30 25 20 26 25 hdmi vivid standard mild pro...

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    8 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 linu...

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    9 block diagram ypbpr1 ypbpr2 vga rgb/ycbcr 24bit rs-232 hdmi i2sii (hdmi) usb spdif av1/s av2 rgb digital if 24bit tuner cvbs bkl control bkl-en v-avout powercontrol sif i2s i i2s uart key l/r-avout ir l/r-av1 l/r-av2 l/r-vga/dvi l/r-ypbpr1 l/r-ypbpr2 hdtv sw. Pi5v330 receiver ad9880 lcd tv control...

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    10 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.

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    11 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,...

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    12 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 ...

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    13 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 whenplaying music. The gain of the ...

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    14 block diagram of tpa3008d2:.

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    15 pin description:.

  • Page 18: Wiring Diagram

    D ig ita l p ro ce ss in g b o ar d 6 6 7 -l 3 2 f c 1 8 -6 9 a n al o g b o ar d 6 6 7 -l 3 2 f c 1 8 -5 3 6 6 7 -l 3 2 f c 1 8 -4 6 lv d s t o b ac k lig h t b o ar d t o k ey b o ar d , i r b o ar d p o w er b o ar d x 7 11 x 7 0 4 x 7 0 2 x 7 0 1 x 7 0 3 x 7 0 5 x 3 0 1 x 2 0 1 x 8 0 4 x 2 0 2 x...

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    17 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...

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    18 signal types. Picture too bright and there is distortion in the brightest area check if the contrast setting is too high. 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 sy...

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    19 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 spot ≤5 ≤2 ≤5 ≤2 ≤3 two neighboring spots ≤2 ≤1 ≤2 ≤1 ≤1 bright spot total no. ≤5 ≤2 ≤5 ≤2 ≤3 ≥15mm one s...

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    20 3. Troubleshooting guide connect the power a red indicator lights? Check power supply, infrared board and power cord. Check if l508 is rosin joint or short to the ground. A blue indicator lights? Check if z801, n801 and v582 are normal does backlight light up check backlight board, ddr, n141, n14...

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    21 3.1 no raster, no picture and no sound note: the soldering quality of resistor rows between n101, n102 and n1 is very important, if it has problem, ddr may fail to work properly. No raster, no picture and no sound check standby5v is the blue indicator lights? Disconnect the power supply board wit...

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    22 2.2 no picture but with sound (blue screen and osd appear) note: please refer to checking procedure (5) to get the methods for checking the phenomenon of no picture but with sound of hdmi channel 3.3 no picture but with sound (only backlight lights up) note: n807 is different according the corres...

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    23 3.4 no sound but with picture note: the audio signal of atsc and hdmi is directly fed into msp4440 with the i2s signal format, so, if the audio signal of these channels has problem, it will not lie in n601. No sound but with picture check if xv02 has output speaker fails to work check if correspo...

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    24 3.5 a certain channel fails to work properly a) av/s-terminal with no picture b) tv with no picture check if c440 or c441 has input signal check if c861 or c862 has input signal check periphery circuit of n101, crystal oscillation and power supply circuit there exits problems at the place from so...

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    25 c) d_sub with no picture d) ypbpr with no picture e) hdmi with no picture note: in order to display hdmi picture properly (especially when use the dvd with hdcp information), first make sure to flash write n501(ddc chip of hdmi interface) accurately, and the connection wire between n501, n710 and...

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    26 f) 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 diffe...

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    Cpu board.

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    Cpu board.

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    Cpu board.

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    Cpu board.

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    Cpu board.

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    Cpu board.

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    Cpu board.

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    Cpu board.

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    Cpu board.

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    Cpu board.

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    Av trans-connect board.

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    Analog board.

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    32" power board 667-l32t18-20

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    Main assembly (lc-32fc18) name no. Main component and it’s no. Analog board 667.L32fc18-53 n201 nv01 msp4440g (353.44400-20) tpa3008d2 (353.30080-10) digital processing board 667.L32fc18-69 n561 n502 n1 thc63lvdm83r (353.00830-10) ad9880kst-100 (353.98800-20) x240h (353.02400-10) trans-connect board...

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    Appendix: exploded view (lc-32x18).

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    Part list of exploded view (lc-32x18) no. Part no. Descriptionre 1 808-20332-202 active panel 2 780-g18l0-aw1 front cover 3 870-30190-00 led columnbracket 4 360-30042-00 power switch 5 700-60256-00 led column 6 700-60255-100 led column 7 infrared receiving board assy 8 screen 9 615-10562-00 lcd scre...

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    603-l32fc18-14 ver.1.1.