CONTENTS Safety instructions………………………………………………………………………..… Adjustment instruction …………………………….…….…………………………….… Trouble shooting ……………………………………………………….…………………… LC-32K16 working principle analysis……………………………….………….…………. LC-32K16 block diagram…………………………………..……………………….………… IC block diagram………………………………………………………………………..…… Main assembly……………………………………………………………………………..… Identification criteria for the bright spot and dark spot of the LCD screen………..…. Wiring diagram ……………………………………………………………..……………... Troubleshooting charts………………………………………………………………..…… Exploded view …………………………………………………………………….…..
This service manual is only for service personnel to take reference with. Before Attention: servicing please read the following points carefully. Safety instructions 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;...
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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.
Alignment instruction 1 Alignment equipment PM5518 (video signal generator) K-7253 (VGA signal generator) CA210 (white balancer) 2 Alignment flow-chart The alignment flow-chart is shown as fig-1 Check DDC and FLASH To produce CPU board and analog board Check the CPU board and analog board All testing Connect with central signal source, then check each function of TV such as analog control etc., check the output of headphone and speaker...
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3.1 EEPROM initialization Enter the first page of factory menu, select “clear eeprom” and then press “enter”, shut down the unit after “ok” appears. 3.2 VGA/DVI channel adjustment 3.2.1 Preset VGA channel mode Input VGA signal (PATTERN 5: Final Test) of K-7253, select TIME301(640*350/70Hz), press “AUTO”...
the value of the two levels gray-scale be the specified value. 3.4 white balance adjustment YPbPr channel input YpbPr signal of K-7253 to YPbPr-1 terminal, input TIME380(480i) PATTERN471 8 level gray-scale signal, set the value of Hor-width to 23, Ver-width to 5, S-bright to 120 and S-contrast to 140.Enter adjustment menu of white balance, adjust the third level using white balancer.
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Fringe in picture Check if the antenna is correctly oriented. Maybe there is electric wave reflected from hilltop or building. Picture is interfered by stripe Possibly due to interference from automobile, train, high shaped bright spots voltage transmission line, neon lamp etc. Maybe there is interference between antenna and power supply line.
LC-32K16 working principle analysis Please refer to LC-32K16 BLOCK DIAGRAM in order to know the working principle of LC-32K16 brief introduction to its signal flow is shown as follows: RF signal produces composite color television signal through TUNER201, the signal together with AV1/SVHS (SVHS priority) and AV2 etc.
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After a series of procedure such as matrix, chroma and tint etc. by FL12310, the two ways signal will be converted into RGB of 24bit, then send it to the main processing chip U12 JAG-ASM. Send RGB signal it to the main processing chip U12 at the same time. There has another signal, which should be sent to U12 together with he above two kinds of signal that is: RGB signal of 24BIT produced by DV1 through U15 TFP403/501.
Identification criteria for the bright spot and dark spot of the LCD screen Q’ty 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 2 neighboring ≤2...
Troubleshooting guide 1. No raster Turn-on power supply, check if the red indicator is light in the STANDBY? blue Check PIN7(12V output) of the Check the indicator in power supply board CN904 turn-on condition Check if the indicator is flicker Non-change color in the sensor control normal condition?
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2. raster, but no picture Check if the unit Check can operation? channels have signal? Which is no VGA/DVI Replacing CPU Enter factory-menu, signal board operation CLEAR channels EEPROM, then turn YPRPB Replacing off , turn on again , it if CPU board display picture.
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3.no sound Check if PIN1 is 12V of N04 and N05 Check PIN5 Replacing N04 and PIN8 output of N02 Check power supply Check PIN27 PIN28 output wave of Replacing N02 Check PIN67 wave of N01 Replacing N01 Replacing TUNER01...