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Safety instructions 

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 use anti static electric iron; 
c) It’s a must for the welder to wear anti static gloves. 
Please refer to the detailed list before replacing components that have special safety requirements. 
Do not change the specs and type at will. 

 

2. Points for attention in servicing of LCD 

2.1 Screens are different from one model to another and therefore not interchangeable. Be sure to 
use the screen of the original model for replacement.   
2.2 The operation voltage of LCD screen is 700-825V. Be sure to take proper measures in 
protecting yourself and the machine when testing the system in the course of normal operation or 
right after the power is switched off. Please do not touch the circuit or the metal part of the module 
that is in operation mode. Relevant operation is possible only one minute after the power is 
switched off.   
2.3 Do not use any adapter that is not identical with the TV set. Otherwise it will cause fire or 
damage to the set.   
2.4 Never operate the set or do any installation work in bad environment such as wet bathroom, 
laundry, kitchen, or nearby fire source, heating equipment and devices or exposure to sunlight etc. 
Otherwise bad effect will result.   
2.5 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 the screen is not working after the power is on or in the course of operation, the 
power must be cut off immediately and no more operation is allowed under the same condition.   
2.7 Do not pull out or plug in the connection wire when the module is in operation or just after the 
power is off because in this case relatively high voltage still remains in the capacitor of the driving 
circuit. Please wait at least one minute before the pulling out or plugging in the connection wire. 
2.8 When operating or installing LCD please don’t subject the LCD components to bending, twisting 
or extrusion, collision lest mishap should result.   
2.9 As most of the circuitry in LCD TV set is composed of CMOS integrated circuits, it’s necessary 
to pay attention to anti statics. Before servicing LCD TV make sure to take anti static measure and 
ensure full grounding for all the parts that have to be grounded.   

 

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 

Attention: 

This

 

service manual is only for service personnel to take reference with. Before 

servicing please read the following points carefully. 

 

 

Summary of Contents for LC23K6

Page 1: ...COLOR TELEVISION LC23K6 7...

Page 2: ...will result 2 5 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 mod...

Page 3: ...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...

Page 4: ...al then select the mode item after that you can press enter to select three kinds of color temperature namely 6500K 9300K and 12000K press MENU to exit Note the white balance adjustment should be done...

Page 5: ...two levels gray scale be 308 and 316 Select 9300k of mode adjustment offset_R offset_G and offset_B let the color coordinate of the third level be 285 and 290 and its brightness be 12 5nit more or les...

Page 6: ...l source and check if there are channels be skipped 4 2 AV S YpbPr terminals Input AV S HD signal check if it is normal 4 3 VGA terminal Insert VGA terminal input VGA format signal of 640 X 480 60 Hz...

Page 7: ...by the red LED at the front of the TV set See if it s receiving the signal that is transmitted from other source than the station Check if it s connected to the wrong terminal or if the input mode is...

Page 8: ...y connected or if it has received the video signal correctly Blur picture Check if the antenna cable is correctly connected Of if it has received the right video signal No sound Check if the mute audi...

Page 9: ...be 115200 Then select Reset Target After Download Click FLASH pushbutton it s ready to run For other settings please refer to the Fig Above already defaulted by the system normally no need to change S...

Page 10: ...ould 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 do the picture format processing for the three kinds of signal in U12...

Page 11: ...AV R L OUT U15 DVI DRIVER TFP501 U12 SCALER JAG ASM U29 VIDEO DECODER VPC3230 U30 ADC MST9883 U13 DEINTER LACER FLI2310 U14 SDRAM U19 SDRAM U20 SDRAM U31 LVDS DRIVER DS90C385A U3 EEPROM N201 AUDIO PRO...

Page 12: ...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 47 48 PIN D4 1 D4 2 PCMCIA selected input R L 50 51 PIN Input of VGA R L 53 54...

Page 13: ...73 PIN Input Y of PCMCIA 6 PIN Input V of PCMCIA 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...

Page 14: ...3 3 AD9883...

Page 15: ...4 4 FLI2310 Simplified Internal Block Diagram...

Page 16: ...5 5 JAG ASM...

Page 17: ...6 6 Z86229 Pins description 7 PIN VDIEO INPUT 2 PIN G OUTPUT 3 PIN B OUTPUT 18 PIN R OUTPUT 17 PIN FB OUTPUT...

Page 18: ...ASM 353 0JAG0 00 FLI2310 353 23100 00 TFP501 353 05010 00 VPC3230D 353 32300 80 MST9883B 353 98830 10 DS90C385 353 03850 20 Z8622912SS 353 86229 10 TSC80251G2D 353 80251 10 AT49F002NT 352 49002 70 IR...

Page 19: ...mm 5mm Total defected point 8 7 5 4 Notes 1 Definition of defected point bright spot dark spot It is identified as a defected point if its area exceeds 1 2 of a single picture element R G B 2 Definiti...

Page 20: ...16 Wiring diagram 667 L23K7 20 667 L23K6 56R...

Page 21: ...it s melted of FUSE in the power supply board Replacing power supply board Check the indicator in turn on condition Check if the indicator is flicker in the sensor control normal condition Check if th...

Page 22: ...wer supply 5V V of video processing board Check input 24V of sound conversion board Check input 24V A of CPU board Check output 24V A of power supply board Check if PIN2 1VPP signal and noise wave of...

Page 23: ...12V of N213 and N214 Check power supply Check PIN5 and PIN8 output of N203 Check PIN27 and PIN28 output wave of N201 Check PIN67 wave of N201 Replacing TUNER202 Replacing N213 and N214 Replacing N203...

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Page 29: ...L23K7 20 NEW...

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