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LG T730BHKL, Service Manual

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MODEL :T730BHKL                                   DATE:2004.12.20

MODEL :T730BHKL                                   DATE:2004.12.20

R 4 1 9

0 R N 4 7 0 2 F 4 0 9

47K 1/6W 1% TA52

R 4 2 0

0 R D 2 0 0 1 Q 6 0 9

2K 1/4W(3 5% TA52

R 4 2 1

0 R D 1 5 0 1 Q 6 0 9

1.50K 1/4W(3 5% TA52

R 4 2 2

0 R D 2 0 0 1 Q 6 0 9

2K 1/4W(3 5% TA52

R 4 2 3

0 R D 1 0 0 0 Q 6 0 9

100 1/4W(3 5% TA52

R 4 2 4

0 R D 1 0 0 0 Q 6 0 9

100 1/4W(3 5% TA52

R 4 2 5

0 R D 1 0 0 0 Q 6 0 9

100 1/4W(3 5% TA52

R 4 2 6

0 R D 1 0 0 0 Q 6 0 9

100 1/4W(3 5% TA52

R 4 2 7

0 R D 1 0 0 2 Q 6 0 9

10K 1/4W(3 5% TA52

R 4 2 9

0 R D 1 0 0 2 Q 6 0 9

10K 1/4W(3 5% TA52

R 4 3 0

0 R D 1 0 0 0 Q 6 0 9

100 1/4W(3 5% TA52

R 4 3 1

0 R D 1 8 0 2 Q 6 0 9

18K 1/4W(3 5% TA52

R 4 3 2

0 R D 2 0 0 1 Q 6 0 9

2K 1/4W(3 5% TA52

R 4 3 3

0 R D 2 0 0 1 Q 6 0 9

2K 1/4W(3 5% TA52

R 4 3 4

0 R D 1 5 0 3 Q 6 0 9

150K 1/4W(3 5% TA52

R 4 3 6

0 R D 3 6 0 1 Q 6 0 9

3.60K 1/4W(3 5% TA52

R 4 3 7

0 R N 2 7 0 2 F 4 0 9

27K 1/6W 1% TA52

R 4 3 8

0 R D 1 3 0 3 Q 6 0 9

130K 1/4W(3 5% TA52

R 4 3 9

0 R N 4 7 0 0 F 4 0 9

470  1/6W  1  TA52

R 4 4 0

0 R N 1 0 0 1 F 4 0 9

1K 1/6W 1% TA52

R 4 4 1

0 R D 3 3 0 2 Q 6 0 9

33K 1/4W(3 5% TA52

R 4 4 2

0 R N 3 9 0 1 F 4 0 9

3.90K 1/6W 1% TA52

R 4 4 3

0 R D 2 2 0 0 Q 6 0 9

220 1/4W(3 5% TA52

R 4 4 4

0 R D 4 7 0 0 Q 6 0 9

470 OHM 1/4 W (3.4) 5% TA52

R 4 4 5

0 R D 4 7 0 0 Q 6 0 9

470 OHM 1/4 W (3.4) 5% TA52

R 4 4 6

0 R D 1 0 0 0 Q 6 0 9

100 1/4W(3 5% TA52

R 4 4 7

0 R D 1 0 0 0 Q 6 0 9

100 1/4W(3 5% TA52

R 4 4 9

0 R N 7 5 0 1 F 4 0 9

7.50K 1/6W 1% TA52

R 4 5 0

0 R D 1 2 0 3 Q 5 0 9

120K OHM 1/4 W (3.4) 2% TA52

R 4 5 1

0 R D 1 0 0 1 Q 6 0 9

1K 1/4W(3 5% TA52

R 4 5 2

0 R D 2 0 0 2 Q 6 0 9

20K 1/4W(3 5% TA52

R 4 5 3

0 R D 2 0 0 1 Q 6 0 9

2K 1/4W(3 5% TA52

R 4 5 4

0 R D 2 0 0 1 Q 6 0 9

2K 1/4W(3 5% TA52

R 4 5 5

0 R D 1 0 0 2 Q 6 0 9

10K 1/4W(3 5% TA52

R 4 5 6

0 R D 1 0 0 0 Q 6 0 9

100 1/4W(3 5% TA52

R 4 6 1

0 R D 3 9 0 0 Q 6 0 9

390 1/4W(3 5% TA52

R 4 6 2

0 R D 2 0 0 1 Q 6 0 9

2K 1/4W(3 5% TA52

R 4 6 3

0 R D 4 7 0 1 Q 6 0 9

4.70K 1/4W(3 5% TA52

R 5 0 1

0 R D 0 1 0 2 A 6 0 9

10 OHM 1/2 W (7.0) 5% TA52

R 5 0 2

0 R D 8 2 0 2 Q 6 0 9

82K 1/4W(3 5% TA52

R 5 0 3

0 R D 1 5 0 2 Q 6 0 9

15K 1/4W(3 5% TA52

R 5 9 8

0 R D 2 0 0 1 Q 6 0 9

2K 1/4W(3 5% TA52

R 6 0 1

0 R D 1 0 0 0 Q 6 0 9

100 1/4W(3 5% TA52

R 6 0 2

0 R D 1 0 0 0 Q 6 0 9

100 1/4W(3 5% TA52

R 6 0 3

0 R N 0 2 2 0 H 6 0 9

0.22 1/2W 5% TA52

R 6 0 4

0 R D 0 1 0 1 A 6 0 9

1 OHM 1/2 W (7.0) 5% TA52

R 6 0 5

0 R D 0 1 0 2 A 6 0 9

10 OHM 1/2 W (7.0) 5% TA52

R 6 0 6

0 R D 4 7 0 0 Q 6 0 9

470 OHM 1/4 W (3.4) 5% TA52

R 6 0 7

0 R N 4 3 0 1 F 4 0 9

4.30K 1/6W 1% TA52

R 6 0 8

0 R D 5 6 0 0 A 6 0 9

560 OHM 1/2 W (7.0) 5% TA52

R 7 0 1

0 R D 4 7 0 0 Q 6 0 9

470 OHM 1/4 W (3.4) 5% TA52

R 7 0 2

0 R D 6 2 0 0 Q 6 0 9

620 1/4W(3 5% TA52

R 7 0 3

0 R D 5 6 0 1 Q 6 0 9

5.60K 1/4W(3 5% TA52

R 7 0 4

0 R D 1 0 0 2 Q 6 0 9

10K 1/4W(3 5% TA52

R 7 0 5

0 R D 0 1 0 2 Q 6 0 9

10 1/4W(3 5% TA52

R 7 0 6

0 R D 3 3 0 2 A 6 0 9

33K OHM 1/2 W (7.0) 5% TA52

R 7 2 7

0 R X 0 2 7 2 K 6 6 5

27 OHM 2 W 5% SF

R 7 2 8

0 R D 1 0 0 1 Q 6 0 9

1K 1/4W(3 5% TA52

R 7 2 9

0 R D 1 0 0 2 Q 6 0 9

10K 1/4W(3 5% TA52

R 7 3 6

0 R X 2 2 0 1 J 6 0 9

2.2KOHM 1 W 5% TA52

R 7 3 7

0 R N 0 5 6 0 H 6 0 9

0.56 1/2W  5  TA52

R 7 3 8

0 R N 0 5 6 0 H 6 0 9

0.56 1/2W  5  TA52

R 7 3 9

0 R D 2 7 0 1 Q 6 0 9

2.70K 1/4W(3 5% TA52

R 7 4 0

0 R D 0 2 7 1 A 6 0 9

2.7 OHM 1/2 W (7.0) 5% TA52

R 7 4 4

0 R D 1 0 0 1 A 6 0 9

1K OHM 1/2 W (7.0) 5% TA52

R 7 4 5

0 R D 4 7 0 2 Q 6 0 9

47K 1/4W(3 5% TA52

R 7 4 6

0 R D 2 2 0 1 Q 6 0 9

2.20K 1/4W(3 5% TA52

R 7 4 7

0 R D 3 0 0 1 Q 6 0 9

3K 1/4W(3 5% TA52

R 7 4 8

0 R D 4 7 0 2 Q 6 0 9

47K 1/4W(3 5% TA52

R 7 4 9

0 R D 2 2 0 1 Q 6 0 9

2.20K 1/4W(3 5% TA52

R 7 5 0

0 R D 3 0 0 1 Q 6 0 9

3K 1/4W(3 5% TA52

R 7 5 1

0 R D 0 2 2 2 A 6 0 9

22 OHM 1/2 W (7.0) 5% TA52

R 7 5 2

0 R D 2 2 0 1 Q 6 0 9

2.20K 1/4W(3 5% TA52

R 7 5 3

0 R D 3 0 0 1 Q 6 0 9

3K 1/4W(3 5% TA52

R 7 5 4

0 R D 6 8 0 0 A 6 0 9

680 OHM 1/2 W (7.0) 5% TA52

R 7 5 6

0 R D 2 2 0 2 A 6 0 9

22K OHM 1/2 W (7.0) 5% TA52

R 7 6 1

0 R D 3 0 0 1 Q 6 0 9

3K 1/4W(3 5% TA52

R 7 6 2

0 R D 3 0 0 1 Q 6 0 9

3K 1/4W(3 5% TA52

R 7 6 3

0 R D 3 0 0 1 Q 6 0 9

3K 1/4W(3 5% TA52

R 7 6 5

0 R D 3 0 0 0 A 6 0 9

300 OHM 1/2 W (7.0) 5% TA52

R 7 6 8

0 R D 4 7 0 3 A 6 0 9

470K OHM 1/2 W (7.0) 5% TA52

R 7 7 1

0 R D 3 0 0 1 Q 6 0 9

3K 1/4W(3 5% TA52

R 7 7 2

0 R D 1 2 0 2 Q 5 0 9

12K OHM 1/4 W (3.4) 2% TA52

R 7 7 3

0 R D 6 2 0 2 A 6 0 9

62K OHM 1/2 W (7.0) 5% TA52

R 7 8 2

0 R D 3 3 0 1 A 6 0 9

3.3K OHM 1/2 W(7.0) 5.00% TA52

R 7 9 3

0 R D 4 7 0 2 Q 6 0 9

47K 1/4W(3 5% TA52

R 7 9 7

0 R D 1 5 0 1 Q 6 0 9

1.50K 1/4W(3 5% TA52

R 7 9 8

0 R D 2 0 0 1 Q 6 0 9

2K 1/4W(3 5% TA52

R 7 9 9

0 R D 1 5 0 2 Q 6 0 9

15K 1/4W(3 5% TA52

R 8 0 1

0 R D 1 5 0 2 Q 6 0 9

15K 1/4W(3 5% TA52

R 8 0 2

0 R D 1 5 0 2 Q 6 0 9

15K 1/4W(3 5% TA52

R 8 0 3

0 R D 1 0 0 1 Q 6 0 9

1K 1/4W(3 5% TA52

R 8 0 9

0 R X 0 1 0 1 K 6 6 5

1 OHM 2 W 5% SF

R 8 1 8

0 R N 6 2 0 2 F 4 0 9

62KOHM 1/6 W 1% TA52

R 9 0 1

0 R D 4 7 0 3 A 6 0 9

470K OHM 1/2 W (7.0) 5% TA52

R 9 0 2

0 R D 0 3 3 2 Q 6 0 9

33 1/4W(3 5% TA52

R 9 0 3

0 R N 0 5 6 2 F 4 0 9

56 OHM 1/6 W 1% TA52

R 9 0 4

0 R X 3 9 0 2 K 6 6 5

39K OHM 2 W 5% SF

R 9 0 6

0 R D 6 2 0 0 Q 6 0 9

620 1/4W(3 5% TA52

R 9 0 7

0 R D 3 9 0 2 Q 6 0 9

39K 1/4W(3 5% TA52

R 9 1 0

0 R X 4 7 0 2 J 6 0 9

47K OHM 1 W 5% TA52

R 9 1 1

0 R D 0 2 0 2 Q 6 0 9

20 1/4W(3 5% TA52

R 9 1 2

0 R N 1 8 0 2 F 4 0 9

18K 1/6W 1% TA52

R 9 1 3

0 R N 2 7 0 1 F 4 0 9

2.7K OHM 1/6 W 1.00% TA52

R 9 1 5

0 R D 2 0 0 0 Q 6 0 9

200 1/4W(3 5% TA52

R 9 1 6

0 R D 1 0 0 2 Q 6 0 9

10K 1/4W(3 5% TA52

R 9 1 8

0 R D 1 0 0 1 Q 6 0 9

1K 1/4W(3 5% TA52

R 9 2 3

0 R D 1 0 0 3 Q 6 0 9

100K 1/4W(3 5% TA52

R 9 2 4

0 R N 0 3 9 0 H 6 0 9

0.39 1/2W  5  TA52

R 9 2 5

0 R N 0 3 9 0 H 6 0 9

0.39 1/2W  5  TA52

R 9 2 6

0 R D 4 3 0 1 Q 6 0 9

4.30K 1/4W(3 5% TA52

R 9 2 7

0 R D 2 0 0 2 Q 6 0 9

20K 1/4W(3 5% TA52

R 9 2 8

0 R D 1 8 0 0 Q 6 0 9

180 1/4W(3 5% TA52

R 9 2 9

0 R D 0 3 3 2 Q 6 0 9

33 1/4W(3 5% TA52

R 9 4 1

0 R N 0 2 2 0 H 6 0 9

0.22 1/2W 5% TA52

R 9 4 4

0 R D 4 7 0 0 A 6 0 9

470 OHM 1/2 W (7.0) 5% TA52

R 9 4 5 - 1

0 R D 4 7 0 1 Q 6 0 9

4.70K 1/4W(3 5% TA52

R 9 5 2

0 R D 1 2 0 2 A 6 0 9

12K OHM 1/2 W(7.0) 5.00% TA52

R 9 5 3

0 R D 1 0 0 1 A 6 0 9

1K OHM 1/2 W (7.0) 5% TA52

R 9 5 4

0 R D 4 7 0 1 Q 6 0 9

4.70K 1/4W(3 5% TA52

R 9 5 5

0 R D 4 7 0 1 Q 6 0 9

4.70K 1/4W(3 5% TA52

R 9 5 6

0 R D 6 8 0 2 A 6 0 9

68K OHM 1/2 W (7.0) 5% TA52

R 9 5 7

0 R D 0 4 7 2 A 6 0 9

47 OHM 1/2 W (7.0) 5% TA52

R 9 6 0

0 R D 6 2 0 0 A 6 0 9

620 OHM 1/2 W(7.0) 5.00% TA52

O T H E R s

F 1

4 3 0 - 8 5 8 C

AFC-520 BAE EUN TA

F 2

4 3 0 - 8 5 8 C

AFC-520 BAE EUN TA

F 9 0 1

0 F Z Z T T H 0 0 1 B

"TIME LAG HBC 5A/250V,215 
0 0 5 , L I T T E L F U S E "

P 7 0 1

3 6 6 - 1 1 2 K

SA-0002K/YFW800-04L SE-A/YEONHO 4P 

- 4

0

 -

*S    *AL  

LOC NO

.     PART NO.             DESCRIPTION/SPECIFICATON

*S    *AL  

LOC NO

.     PART NO.             DESCRIPTION/SPECIFICATON

Summary of Contents for T730BHKL

Page 1: ...rvice com E mail http www LGEservice com techsup html CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL MODEL T730BH K T730BHKL K E CHASSIS NO CA 136 T730SHKL K E Same model for Service Same looking with new chassis T730SH K ...

Page 2: ...Image Size 325 1 x 243 8 mm 12 80 x 9 60 Preset Image Size 310x 230 mm 12 20 x 9 06 4 2 Display Color Full Colors 4 3 Display Resolution 1280 x 1024 60Hz Max Non Interlace 4 4 Video Bandwidth 110 MHz 5 ENVIRONMENT 5 1 Operating Temperature 0 C 40 C Ambient 5 2 Relative Humidity 10 80 Non condensing 5 3 Altitude 5 000 m 6 DIMENSIONS with TILT SWIVEL Width 400 mm 15 75 inch Depth 411 mm 16 18 inch H...

Page 3: ...joints frayed leads damaged insulation solder splashes or the sharp points Be sure to remove all foreign materials IMPLOSION PROTECTION All used display tubes are equipped with an integral implosion protection system but care should be taken to avoid damage and scratching during installation Use only same type display tubes X RADIATION The only potential source of X radiation is the picture tube H...

Page 4: ...st receiver ground lead to the receiver chassis ground before connecting the test receiver positive lead Always remove the test receiver ground lead last 9 Use with this receiver only the test fixtures specified in this service manual CAUTION Do not connect the test fixture ground strap to any heat sink in this receiver Electrostatically Sensitive ES Devices Some semiconductor solid state devices ...

Page 5: ...tip as the solder melts 2 Draw away the melted solder with an anti static suction type solder removal device or with solder braid before removing the IC Replacement 1 Carefully insert the replacement IC in the circuit board 2 Carefully bend each IC lead against the circuit foil pad and solder it 3 Clean the soldered areas with a small wire bristle brush It is not necessary to reapply acrylic coati...

Page 6: ...onnection 4 Route the jumper wire along the path of the out away copper pattern and let it overlap the previously scraped end of the good copper pattern Solder the overlapped area and clip off any excess jumper wire At Other Connections Use the following technique to repair the defective copper pattern at connections other than IC Pins This technique involves the installation of a jumper wire on t...

Page 7: ...68 677 14 561 10 836 3 725 0 508 1 016 2 201 V 85 00 11 764 11 182 0 582 0 014 0 044 0 524 Mode H V Sort 1 2 3 4 640x480 800x600 1024x768 800x600 Dot Clock MHz Horizontal Frequency kHz Vertical Frequency Hz Horizontal etc µs Vertical etc ms Sync Polarity Frequency Active Time A Video Time B Front Porch D Blanking Time C Sync Time E Back Porch F Resolution 1 62 A B C D E F Video Sync 5 H V 1280x768...

Page 8: ...y remove the Tilt S wivel by pulling it upward 3 Remove the screw b Back cover by pushing it upward 4 R elease the latch c S ee Tip S pec 5 S lide the Back Cover away from the Front Cabinet of the monitor Tip C B A Tip S pec A Width 5 0 15 0mm B Depth 0 6 0 9mm C Height 12 0mm a B ack Cover C abinet c b ...

Page 9: ...WIRING DIAGRAM 9 P501 P201 P405 P301 P302 G2 P702 P701 T1 P402 P902 S S Signal Cable AC Socket FBT P203 P202 P220 P904 ...

Page 10: ...it Dynamic FOCUS Circuit Brightness Control 160V 40V D D Feed Back SCL SDA H Sync V Sync PWM Control Signal 50V DY CDT Heater 6 3V I 2 C Screen H V R G B Bias H Drive B Drive B DPM Control Circuit 5V 6 3V 8V 80V Voltage feedback Degaussing Coil Dynamic Focus Static Focus TILT Coil 50V 80V 5V G2 G1 Auto Beam Limit DC DC Converter FBT T701 Regulation Circuit SMPS T901 5V BRIGHTNESS CONTR AST MOIRE D...

Page 11: ...deo drive output block The video drive IC IC302 receives the video signal from PC The gain of each channel is controlled by MICOM through IIC The cut off circuit compensate different voltage of each channel between the cathode and the G1 of the CDT 1 The AC line voltage is rectified by the bridge diode D900 2 The control IC IC901 starts switching and generates switch pulse in the primary turn of t...

Page 12: ...signal from 0 0 7 V to 0 4 V It is operated by taking the clamp R G B drive and contrast signal from the MICOM IC401 16 Video Output Amp Circuit This circuit amplifies the video signal which comes from the video pre amp circuit and amplified it to applied the CDT cathode ...

Page 13: ...x position 1 Adjustment for B Voltage 1 Display cross hatch pattern at Mode 4 2 Check D961 cathode voltage within 50V 1V 2 Adjustment for High Voltage 1 Display cross hatch pattern at Mode 4 2 Enter the SVC SUB menu as the following instruction 3 Adjust H Voltage to 25 8kV 0 1 kV by adjust 1 P value 2 Adjustment by Service Hot key How to enter SVC HOT KEY 1 Press Menu and OSD window will appear 2 ...

Page 14: ...0 Contrast Maximum Brightness Maximum Color temperature 9300K 11 1 Adjustment of cut off Adjustment of back raster 11 1 a Before adjustment press Menu and Degauss to remove Enter hot key mode Adjust Brightness and Contrast to Max in OSD window 1 Adjust cut off back raster first Enter DEGAUSS in the Menu and modify the following data Modify RCUT to Min Modify GCUT To Min Adjust to BCUT Data 127 7F ...

Page 15: ...5Hz 69kHz 85Hz Display image White flat field Luminance Cut off point at the center of the display area Note Color purity adjustments should only be attempted by qualified personnel PROCEDURE For trained and experienced service technicians only Use the following procedure to correct minor color purity problems 1 Make sure the display is not affected by external magnetic fields 2 Very carefully bre...

Page 16: ...repeat above from number 6 to 16 20 COMMAND PRESET EXIT Y Yes command 2 Adjustment for White Balance and Luminance 1 Set the White Balance Meter 2 Press the DEGAUSSING on the OSD menu for demagnetization of the CDT 3 Display color 0 0 pattern at Mode 4 4 COMMAND PRESET START Y Yes command 5 Set Bightness and Contrast to max position 6 COLOR ADJ LUMINANCE command of the alignment program 7 COLOR AD...

Page 17: ...FF FF FF FF 00 1E 6D C2 43 01 00 00 00 10 01 0E 01 03 18 21 18 B5 EA F6 29 A2 53 47 99 25 20 10 48 4C FF FE 80 31 59 71 4F 45 59 61 59 81 80 30 81 4A 01 01 01 01 EA 24 00 60 41 00 28 30 30 60 40 13 00 36 E6 10 00 00 1E 00 00 00 FD 00 32 A0 1E 50 47 0B 00 0A 20 20 20 20 20 20 00 00 00 FC 00 54 60 37 33 30 42 48 0A 20 20 20 20 20 20 00 00 00 FC 70 00 0A 20 20 20 20 20 20 20 20 20 20 20 20 00 00 01 0...

Page 18: ...V Control Line N o t u s e d R S 2 3 2 C P A R A L L E L V S Y N C P O W E R S T VGS MONIT OR E V Sync On Off Switch Switch must be ON F A B C E F A B C 15 10 5 5 6 9 1 1 1 14 13 25 6 5V 5V 5V 4 7K 4 7K 4 7K 74LS06 74LS06 OFF ON OFF ON 11 VIDEO SIGNAL GENERATOR Figure 1 Cable Connection Figure 1 Cable Connection ...

Page 19: ...D941 D942 D906 CHECK FUSE OK F901 19 TROUBLESHOOTING GUIDE 1 NO POWER NO POWER POWER INDICATOR OFF NO NO NO NO TROUBLE IN Q951 Q952 Q941 Q942 TROUBLE IN FUSE F901 SMPS Switch ON OFF Waveforms TROUBLE IN BRIDGE DIODE D900 TROUBLE IN IC901 Q901 TROUBLE IN D971 D961 D951 D904 D941 D942 D906 YES YES YES YES Q901 Drain IC901 6 2 1 ...

Page 20: ...LE IN IC302 P301 TROUBLE IN IC303 TROUBLE IN IC304 YES YES YES YES 20 CHECK IC302 PIN 5 6 7 CHECK IC302 PIN 1 24 23 19 20 21 PIN 18 5V CHECK IC303 PIN 1 2 3 PIN8 8V PIN 4 80V CHECK R G B CATHODE VOLTAGE IC302 5 6 7 IC302 23 IC302 19 20 21 IC302 1 IC302 24 CDT RK GK BK Waveforms 28 27 30 31 26 27 28 29 30 31 29 ...

Page 21: ...8 PIN20 PIN21 CHECK POWER INDICATOR GREEN or FLASH 21 3 NO RASTER FLASH NO NO NO TROUBLE IN IC401 MICOM TROUBLE IN P302 SIGNAL CABLE ROTATE SCREEN CONTROL KNOB TO CLOCKWISE or COUNTER CLOCKWIES TROUBLE IN PRIMARY CIRCUIT OF T901 TROUBLE IN CDT SOCKET BOARD GREEN YES YES YES NO VIDEO POWER INDICATOR GREEN or FLASH IC401 18 IC401 20 IC401 21 14 7 5 5 14 7 Waveforms ...

Page 22: ...WTOOTH WAVE CHECK IC601 Pin 3 13V 22 4 NO VERTICAL DEFLECTION NO V DEFLECTION ONE HORIZONTAL LINE NO NO NO TROUBLE IN IC601 V CIRCUIT TROUBLE IN T901 13V Line Waveforms TROUBLE IN T701 40V line TROUBLE IN IC401 YES YES YES IC401 33 IC401 34 9 8 8 9 ...

Page 23: ...TROUBLE IN T901 or PC CHECK PC PC IS NOT GOING INTO DPM MODE TROUBLE IN X401 IC401 TROUBLE IN POWER SUPPLY TROUBLE IN IC401 NO TROUBLE IN Q941 Q951 Q942 Q952 NO H V SYNC SIGNAL YES YES YES YES DPMS TABLE NORMAL ON ON NORMAL BLUE STAND BY OFF ON OFF 0V FLASH SUSPEND ON OFF OFF 0V FLASH OFF OFF OFF OFF 0V FLASH H V SYNC VIDEO LED MODE ITEM C401 45 IC401 46 CHECK IC401 PIN 16 5V HIGH 4 3 Waveforms Q9...

Page 24: ...VOLTAGE 0 5V CHECK P902 CHECK RL901 CHECK IC401 PIN 4 5V 6 NO DEGAUSSING NO DEGAUSSING NO NO NO NO TROUBLE IN TH901 DEGAUSSING COIL TROUBLE IN IC401 MICOM TROUBLE IN D953 TROUBLE IN P902 TROUBLE IN RL901 YES YES YES YES 24 ...

Page 25: ...O NO NO NO 1 Check IC401 Pins 39 40 41 2 Replace IC401 Check Q720 50V LINE D710 Check Q704 Check 13V line Check and replace T703 and Q706 Check DY connector connection YES YES YES IC401 18 Q706 Base Q706 Collector Q719 Drain Q705 Drain 5 18 19 21 20 Waveforms 8 Invariable H_Size NO Check and replace IC401 Check if DC voltage of IC401 PIN 35 wave is Variable 6 IC401 35 6 ...

Page 26: ...ROUBLE IN IC401 MICOM TROUBLE IN Q711 Q716 TROUBLE IN L703 TROUBLE IN C722 C723 C726 C729 NO NO NO YES YES YES Cs SIGNAL TABLE HORIZONTAL FREQUENCY fH 30K 33 9K 34K 38 9K 39K 43 9K 44K 48 9K 49K 51 9K 52K 57 9K 58K 61 9K 62K 65 9K 66K 71K Cs1 L L H H H H H H H Cs3 L L L L L L L H H Cs2 L H L L H H H H H ...

Page 27: ...eform Q706 Collector is right 27 10 Abnormal H_Size NO NO Repeat the troubleshooting Guide of H_deflection failure Check D D converter circuit Check IC401 B control circuit YES 11 Side Pin or Trap Failure NO 12 Para or Pin Balance Failure Replace IC401 Check and replace IC401 Q706 Collector IC401 35 21 6 21 6 Waveforms ...

Page 28: ...401 Pin 26 output duty varies with different DAC values 13 Tilt Failure Check tilt connector connection Check and replace CRT NO NO Check and replace IC401 Check Q503 Q501 Q502 YES YES 14 V Size or Pos Variation Failure Check and replace IC401 and IC601 NO Check some parts around IC401 YES 28 IC401 33 IC401 34 Waveforms ...

Page 29: ...ion failure YES YES 16 ABL Failure YES NO Check and replace CRT Input full white pattern to monitor Check P302 D801 R801 803 R798 Check and replace IC302 Check and replace T701 NO YES 29 Q719 Drain Q706 Collector IC302 Pin22 input exists and varies with different patterns T701 Pin 6 Voltage exists 18 18 Waveforms 21 21 YES waveform is right Q719 drain ...

Page 30: ...Pin 24 output are right Q710 and parts around are right 17 Focus Failure NO NO NO Check the connection between FBT Pin 12 CRT Socket PCB Check and replace IC401 Waveforms Replace failed part Replace failed part YES YES YES 30 IC401 24 FBT 12 22 23 ...

Page 31: ... are right IC401 Pin 45 and 46 inputs are right IC401 Pin 16 input is over 4 2V 18 Micom Failure 19 OSD Failure NO NO NO NO Done Change IC302 Check Q903 D908 ZD902 Check X401 Check and replace R451 C408 Replace IC401 YES YES YES YES 31 IC401 45 IC401 46 Waveforms ...

Page 32: ...d replace IC401 Check and replace function key YES 21 Missing Color NO Change the CRT Check signal generator and signal cable NO Refer to 2 No Charcter NO Check and replace IC303 and IC304 NO Check C341 C346 and G2 wire Check around FBT circuits also YES YES YES YES 32 Proper AC voltage are on all cathodes Proper DC voltage are on all cathodes G2 voltage is right ...

Page 33: ...ible Retrace Check white balance adjustment NO NO NO Done Check G2 control volume and FBT Check IC302 and related components Check Q799 and related components YES YES YES 33 Degaussing circuit is right Purity is right 23 Purity Failure Degaussing YES NO Replace CRT and verify purity Done Refer to 6 NO Degaussing NO YES ...

Page 34: ...Done Change CRT and readjust convergence Yes Done No 25 Poor Focus Adjust focus VR Check focus leads from FBT to CRT Socket Check the CRT Socket YES Aging monitor and check for focus change NO Refer to 18 Dynamic Focus Failure NO Replace the CRT and verify focus YES 34 Dynamic focus circuit is right ...

Page 35: ...EXPLODED VIEW 35 10 12 12 13 11 2 11 1 7 B A 2 6 5 a b b 1 d 15 14 15 3 9 c 8 ...

Page 36: ...SEMBLY T710BH PH C046 AF320T 8C358 EQ54 T730SHKL 14 15 4930TKK036A 4930TKK031C HOLDER PCB FIX FB770G HOLDER PCB FIX PC ABS d 332 110A SCREW PZS 3 6 MSWR FZMY 6318L17023E 3091TKC130X 3091TKC130H CABINET ASSEMBLY T730BHKL BRAND C097 BLACK B V TCO99 MOU4 0 EXPORT CABINET ASSEMBLY T730BHKL BRAND C097 BLACK TCO99 3809TKC050B BACK COVER ASSEMBLY T710BH PH C046 GN5008HF 8C358 EQ54 T730BHKL CDT CIRC M41QE...

Page 37: ...C419 0CQ2221N409 2200PF 100V J PE TP C420 0CQ6831N509 0 068U 100V K POLY TP C421 0CK1020K515 1000PF 50V K B TR C422 0CK2220K515 2200P 50V K B TS C423 0CK2220K515 2200P 50V K B TS C424 0CE475CK638 4 7UF SHL SD 50V M FM5 TP 5 C426 0CK4710K515 470PF 50V K B TR C427 0CK4710K515 470PF 50V K B TR C501 0CE106CF638 10UF SHL SD 16V M FM5 TP 5 C601 0CE227EF638 220UF KMG RD 16V 20 TP 5 FM5 C602 181 288K MKT ...

Page 38: ...0120A MUR460 15MM GULF BK DO201AD 600V 4A 150A 45NSSEC 10UA D704 0DRFC00300A FFPF04U150S FAIR CHILD BK TO220F 1500V 4A 40A 150NSSEC 7UA D705 0DRTW00089A SRT14 1021 TIWAN SEMI TP NON 40V 1A 25A SEC 0 5MA D706 0DRFC00300A FFPF04U150S FAIR CHILD BK TO220F 1500V 4A 40A 150NSSEC 7UA D710 0DR400409AC UF4004 GULF TP DO41 400V 1A 30A 50NSEC 10UA D712 0DR100009CD RGP10G 1021 TIWAN SEMI TP DO41 400V 1A 30A ...

Page 39: ...799 0TRKE90019A MPSA92 KEC TP TO92 300V 500MA Q901 0TF760000AD SSS7N60B FAIRCHILD ST TO220F 650V 7A Q903 0TR100809AA KSC1008C Y TP SAMSUNG TO92 NPN Q941 0TR319809AA KTC3198 Y KTC1815 TP KEC TO92 NPN Q942 0TR127309AA KTA1273 Y KTA966A TP KEC TO92L PNP Q951 0TR319809AA KTC3198 Y KTC1815 TP KEC TO92 NPN Q952 0TR127309AA KTA1273 Y KTA966A TP KEC TO92L PNP Q953 0TR319809AA KTC3198 Y KTC1815 TP KEC TO92...

Page 40: ...D0271A609 2 7 OHM 1 2 W 7 0 5 TA52 R744 0RD1001A609 1K OHM 1 2 W 7 0 5 TA52 R745 0RD4702Q609 47K 1 4W 3 5 TA52 R746 0RD2201Q609 2 20K 1 4W 3 5 TA52 R747 0RD3001Q609 3K 1 4W 3 5 TA52 R748 0RD4702Q609 47K 1 4W 3 5 TA52 R749 0RD2201Q609 2 20K 1 4W 3 5 TA52 R750 0RD3001Q609 3K 1 4W 3 5 TA52 R751 0RD0222A609 22 OHM 1 2 W 7 0 5 TA52 R752 0RD2201Q609 2 20K 1 4W 3 5 TA52 R753 0RD3001Q609 3K 1 4W 3 5 TA52 ...

Page 41: ...280F6 JEIL 12V DC 1MA VERTICAL 7MM SW203 6600R00001A JTP1280F6 JEIL 12V DC 1MA VERTICAL 7MM SW204 6600R00001A JTP1280F6 JEIL 12V DC 1MA VERTICAL 7MM SW205 6600R00001A JTP1280F6 JEIL 12V DC 1MA VERTICAL 7MM SW206 6600R00001A JTP1280F6 JEIL 12V DC 1MA VERTICAL 7MM SW207 6600M000037 JPS2225A NAMAE 30VDC 0 1A BLUE ANGEL T701 6174T11004F 1063A F700BK 71K JUNGWOO 17 T702 6170TCZ012B EE1916 1 6MH FOCUS T...

Page 42: ...V K B TS C416 0CQ1031N419 0 01U 100V J POLY NI TP C417 0CK1040K945 0 1UF 50V Z F TR C419 0CQ2221N419 2200PF 100V J PE NI TP C420 0CQ6831N509 0 068U 100V K POLY TP C421 0CK1020K515 1000PF 50V K B TR C422 0CK2220K515 2200P 50V K B TS C423 0CK2220K515 2200P 50V K B TS C424 0CE475CK638 4 7UF SHL SD 50V M FM5 TP 5 C426 0CK4710K515 470PF 50V K B TR C427 0CK4710K515 470PF 50V K B TR C501 0CE106CF638 10UF...

Page 43: ...BK TO220F 1500V 4A 40A 150NSSEC 7UA D705 0DRTW00089A SRT14 1021 TIWAN SEMI TP NON 40V 1A 25A SEC 0 5MA D706 0DRFC00300A FFPF04U150S FAIR CHILD BK TO220F 1500V 4A 40A 150NSSEC 7UA D710 0DR400409AC UF4004 GULF TP DO41 400V 1A 30A 50NSEC 10UA D712 0DR100009CD RGP10G 1021 TIWAN SEMI TP DO41 400V 1A 30A 150NSEC 5UA D714 0DSGF00019A 1N4148 GULF TP DO35 100V 0 15A 2A 4NSSEC 25UA D715 0DSGF00019A 1N4148 G...

Page 44: ...A KSC1008C Y TP SAMSUNG TO92 NPN Q941 0TR319809AA KTC3198 Y KTC1815 TP KEC TO92 NPN Q942 0TR127309AA KTA1273 Y KTA966A TP KEC TO92L PNP Q951 0TR319809AA KTC3198 Y KTC1815 TP KEC TO92 NPN Q952 0TR127309AA KTA1273 Y KTA966A TP KEC TO92L PNP Q953 0TR319809AA KTC3198 Y KTC1815 TP KEC TO92 NPN RESISTORs D724 0RD1800A609 180 OHM 1 2 W 7 0 5 TA52 R201 0RD1001Q609 1K 1 4W 3 5 TA52 R202 0RD0912Q609 91 OHM ...

Page 45: ... 3 5 TA52 R748 0RD4702Q609 47K 1 4W 3 5 TA52 R749 0RD2201Q609 2 20K 1 4W 3 5 TA52 R750 0RD3001Q609 3K 1 4W 3 5 TA52 R751 0RD0222A609 22 OHM 1 2 W 7 0 5 TA52 R752 0RD2201Q609 2 20K 1 4W 3 5 TA52 R753 0RD3001Q609 3K 1 4W 3 5 TA52 R754 0RD6800A609 680 OHM 1 2 W 7 0 5 TA52 R756 0RD2202A609 22K OHM 1 2 W 7 0 5 TA52 R761 0RD3001Q609 3K 1 4W 3 5 TA52 R762 0RD3001Q609 3K 1 4W 3 5 TA52 R763 0RD3001Q609 3K ...

Page 46: ...AL 7MM SW204 6600R00001A JTP1280F6 JEIL 12V DC 1MA VERTICAL 7MM SW205 6600R00001A JTP1280F6 JEIL 12V DC 1MA VERTICAL 7MM SW206 6600R00001A JTP1280F6 JEIL 12V DC 1MA VERTICAL 7MM SW207 6600M000037 JPS2225A NAMAE 30VDC 0 1A BLUE ANGEL T701 6174T11004F 1063A F700BK 71K JUNGWOO 17 T702 6170TCZ012B EE1916 1 6MH FOCUS TRANS 700BJ T703 6170TCZ015A EI 19 4 45MH H DRIVE 700BJ T901 6170TMZ153A EER3435 300UH...

Page 47: ... 27 01 28 01 29 30 31 01 01 14 01 15 01 16 01 17 01 18 01 19 01 20 01 21 22 01 02 01 03 01 04 01 05 01 06 01 07 01 08 01 09 01 10 Q901 Drain IC401 20 IC601 6 Q799 Base Q799 Drain Q719 Drain Q705 Drain Q706 Base Q706 Collector Q704 Gate IC305 5 6 7 IC302 1 IC302 24 IC302 23 IC302 19 20 21 CDT RK GK BK IC901 6 IC401 45 IC401 46 IC401 18 IC401 35 IC401 33 IC401 34 IC401 52 01 11 IC401 53 IC401 21 IC4...

Page 48: ... T I U C R I C D E T N I R P e d i S t n e n o p m o C D R A O B N I A M 3 e d i S r e d l o S D R A O B N I A M 4 e d i S t n e n o p m o C D R A O B L O R T N O C 1 e d i S r e d l o S D R A O B L O R T N O C 2 49 ...

Page 49: ...Dec 2004 P NO 3828TSL109G Printed in China ...

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