CONTENTS Safety instructions………………………………………………………………………..… Instructions on adjusting and testing …………………………….…….………………….… Trouble shooting ……………………………………………………….…………………… Principle analysis ………………………………………….…….……………....Block diagram……………………………….………….…………......... IC Block diagram…………………………………..………………………………..………..9 Wiring diagram......................Identification criteria for the bright spot and dark spot of the LCD screen....Exploded view………..…................... Part list ……………………………………………………………..……………....Schematic diagram.………………………………………………………………..……..
Attention: This service manual is only for service personnel to take reference with. Before servicing please read the following points carefully. Safety instructions 1 Instructions 1.1 Be sure to switch off the power supply before replacing or welding any components or inserting/plugging in connection wire 1.2 Anti static measures to be taken (throughout the entire production process!): 1.2.1 Do not touch here and there by hand at will;...
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2.10 There are lots of connection wires between parts behind the LCD screen. When servicing or moving the set please take care not to touch or scratch them. Once they are damaged the screen would be unable to work and no way to get it repaired. 2.11 Special care must be taken in transporting or handling it.
Instructions on adjusting and testing PM5518(Video signal generator),K-7253(VGA signal generator),CA210(White balancer 2.1. Adjustment and calibration flow process For adjustment and calibration flow process diagram, see figure 1 Figure 1 Check CPU and analog board Combined test for general assembly Connect to central signal source, check if various TV functions (station skipping, modulate quantity control etc), check if the output of earphone and speaker are normal Input AV/S, HDTV signal and check various...
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Note: The white balance adjustment should be made in the mode of “Nature” picture. 2.2.1 EPROM Initialization Enter the first page of factory menu, push “ENTER” key after the selecting Clear EEPROM, shut off the power supply after the appearance of “OK”. 2.2.2 VGA and DV1 channels adjustment 2.2.2.1 VGA channel mode preset Input VGA signal of K-7253(PATTERN 5:Final Test),select TIME301 (640*350/70Hz), push ”AUTO”...
density are all set to regulated value. 2.2.4 White balance adjustment of YprPb channel Input YPbPr signal of K-7253 to D4-1 terminal,input eight grades of grey density signal of TIME380(480i)PATTERN471, adjust S-bright to be 120,S-contrast to be 140. Enter the adjustment menu of white balance,adjust second grade with balancer.
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2.TV set: Symptoms Possible cause Unable to switch the power on Check to see if the power plug has been inserted properly into the socket. No picture and sound Check to see if the power supply of liquid crystal TV has been switched on.
No sound Check if the “mute” audio frequency setting is selected. Check if the sound volume is set to minimum. Make sure the earphone is not connected. Check if the cable connection is loose. When playing VHS picture search tape, When being played or in pause VHS picture search tape sometimes there are lines at the top or bottom of can’t provide stable picture, which may lead to incorrect display of the...
IC BLOCK DIAGRAM 1.MSP3420 Pins description: 2,3 PIN:SCL,SDA applied for control the operation of IC . 27,28 PIN:output left and right sound channel R/L to speaker processor. 36,37 PIN:AV OUT of sound R/L. DVI/YPbPr1/YPbPr2 47,48 PIN: selected input R/L. 50,51 PIN:Input of VGA. R/L 53,54 PIN:Input of AV2 R/L.
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2.VPC3230 Pins description: 31-34, 37-40 PIN:output format signal of.ITU-R656 70 PIN:Video of AV OUT 71 PIN:Input C of SVHS. 72 PIN:input Video (SVHS in priority) of Y or AV1 of SVHS. 74 PIN:input Video of AV2. 75 PIN:input Video of TV.
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Serial No. of Parts Part Name Part No. Main components and No. Remark N201 MSP3420G-Q (353-34200-10) Sound conversion N203 M62494FP (353-62494-20) Self 667-L27K6-15 board N213 produced N214 MP7720 (353-77200-10) JAG-ASM (353-0JAG0-00) FLI2310 (353-23100-00) TFP403PZP (353-04030-10) VPC3230D (353-32300-80) Self CPU board assy’ 667-L27K6-56 MST9883B (353-98830-10)
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...
PART LIST PART# DESCRIPTION LOCA.NO. SL27K60-01A10 SOFTWARE 100-L27K60-18 FPE2705 100-L27K60-01 LC-27K6 655-B1201-46 (12-PINS) LEAD WITH HOUSING 665-D0002-525 LVDS LINE FERRITE BEAD 655-41201-280 (4-PINS) LEAD WITH HOUSING 655-81201-61 (8-PINS) LEAD WITH HOUSING 655-8E301-33 (8-PINS) LEAD WITH HOUSING 700-60265-00 LED COLUMN 742-30005-09...