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22 

Serial No. of Parts

 

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 

spot 

2 neighboring 

spots  

Bright 

spo

t  

Total No. 

15mm

 

One single 

spot 

10

Two 

neighboring 

spots 

Dark 

spots 

Total No. 

10

15mm

10mm

 

5mm

 

Total defected point 

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.    Definition of bright spot: It is identified as a bright spot if it is bright in the state of dark field 

and its bright size remains unchanged   

3.    Definition of dark spot: It is identified as a dark spot if it is dark in the state of white field and 

its dark size remains unchanged   

4.    Definition of two neighboring points:    Defects of a group of picture elements(RB,RG,GB). 

 15" 

17" 

20" 

Sell area 

Europe 

Europe 

Europe 

America 

LCD panel 

Samsung 

335-15012-00 

AU 

335-17050-00 

Chimei  

335-2000F-00 

Back light board 

667-L15H3-14 

667-L17H3-14 

667-L20H3-14A 

High frequency board 

667-L15H3S-55 

667-L15H3-55 

 

667-L20H3S-55 

Main board 667-L15H3-01S   667-L20H3-01S 

adapter 302-L1510-02 

302-AD16A-02 

302-AD16A-02 

antetype 203-L15H30-02 

 

 

 

 

 

 

 

 

Sell area 

Europe 

Europe 

Europe 

America 

LCD panel 

AU335-15112-00 

 

AU335-2000F-00 

Back light board 

667-L15H3-14A 

 

667-L20H3-14A 

High frequency board 

667-L15H3S-55 

 

 

667-L20H3S-55 

Main board 

667-L15H3-01BS 

 

 

667-L20H3-01S 

adapter 302-L1510-02 

 

302-ADA6A-02 

antetype 203-L15H30-03 

 

 

203-L20H30-02 

Summary of Contents for HLT-1751

Page 1: ...LCD TV HLT 1751 HLT 2051...

Page 2: ...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...

Page 3: ...r storage 20 60 C humidity Scope for operation 20 85 Scope for storage 10 90 2 13 Display of a fixed picture for a long time may result in appearance of picture residue on the screen as commmonly call...

Page 4: ...board TV board on line Check main board Check TV board Combined test for general assembly Connect to central signal source check if various TV functions station skipping modulate quantity control etc...

Page 5: ...IF adjustment a Input DV 5V into TP2 input 12V to TP6 Input 5V to TP4 and input 0V to TP5 monitor voltage of TP3 input 38 9 MHz signal to TP1 and use a non inductance screw driver to adjust IFT L207 s...

Page 6: ...lue to make x 284 y 299 This procedure may not be taken now f Enter AV mode input 8 grey degree signal adjust tint to 0 adjust brightness and contrast measure sixth degree with CA 210 make Y to 180 cd...

Page 7: ...signal color bar multi wave group observe if the picture of the set is normal The normal screen should be AV1 change SCART signal to RGB format the normal screen should be AV1 RGB c Disconnect SCART s...

Page 8: ...signal receiving Maybe broadcast signal itself is not good Check if the outdoor antenna is disconnected Check if the antenna is correctly oriented Fringe in picture Check if the antenna is correctly o...

Page 9: ...e liquid crystal TV set and make proper adjustment according to the signal types Picture too bright and there is distortion in the brightest area Check if the contrast setting is too high Possibly the...

Page 10: ...may lead to incorrect display of the liquid crystal TVIn this case please press auto key on the remote control so as to enable the liquid crystal TV set to recheck the signal and then to display corr...

Page 11: ...receiver adopts CMO 20 1 inch LCD display screen as display unit It has PAL SECAM B G I D K L L color system receiving functions and at the same time with AV input S VHS input PC VGA connector and ear...

Page 12: ...n processor IC PW1306 PW1306 is a main processing IC built in type X86 CPU with outer memory 8M Flash N20 and controls the whole system The input signal from V port and G port is subject to internal a...

Page 13: ......

Page 14: ...Ground Ground Ground VCC CTL H IN1 L IN2 Red 1 input Green 1 input Blue 1 input Red 2 input Green 2 input Blue 2 input VD 1 input VD 2 input VD output Blue output Composite sync output Composite vide...

Page 15: ......

Page 16: ......

Page 17: ...GPIO PWM IR Decoder A 19 1 D 15 0 CS 1 0 2 Wire Serial Microprocessor Bus Memory Out Bus Memory Buffer Processor Memory Interface Memory In Bus OSD VYUV 7 0 VCLK VPEN PW130 ImageProcessor Internal Blo...

Page 18: ......

Page 19: ......

Page 20: ......

Page 21: ...ply L switch VCO 21 20 18 Loop filter 14 Offset comp optional 26 FPLL 0 90 VIF amp 6 7 8 15 VIF CAGC CBL Take over point SIF input switch CAGC 22 12 4 9 16 13 Standard switch 23 VS 17 CRef Intercarrie...

Page 22: ...V R L R Audio L S video HIGH VOLTAGE HIGH VOLTAGE MSP3420G...

Page 23: ...right size remains unchanged 3 Definition of dark spot It is identified as a dark spot if it is dark in the state of white field and its dark size remains unchanged 4 Definition of two neighboring poi...

Page 24: ...signal Check whether U1 pin 11 have output waveform Check N8 pin3 pin 5 s input signal Replace N8 Yes No Yes No No No Yes No No 23 Troubleshooting guide No raster Does the logo appear on the screen wh...

Page 25: ...B Hors Vers at X7 Check whether N1 has 5V power supply Check whether X9 pin 1 pin 2 have 5V power input Replace N2 Replace V105 V17 Replace N1 Measure N1 pin 33 pin 35 waveform Measure N1 pin 42 pin...

Page 26: ...HLT 1751...

Page 27: ...HLT 2051 01...

Page 28: ...HLT 2051 02...

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