PG17**/PG19**/PG21**
5-1
5 Troubleshooting
5-1 Parts Level Troubleshooting
Notes:
1. If a picture does not appear, fully rotate the brightness and contrast controls clockwise and reinspect.
2. Check the following circuits.
• No raster appears: Power circuit, Horizontal output circuit, H/V control circuit, and H/V output circuit.
• High voltage develops but no raster appears: Video output circuits.
• High voltage does not develop: Horizontal output circuits.
5-1-1 No Power Supply
Check and replace FG601, D601,
IC661, IC662.
Done.
Repeating start?
Check and replace D601, D604, D663,
Q632, and Q664.
No
Yes
IC601 Pin 1 waveform is right?
Check and replace IC601,
IC602, IC604.
Yes
No
IC602 and IC604
are right?
Replace parts and verify voltages.
Yes
No
Normal operation
Replace Main board.
Yes
Yes
No
WAVEFORMS
1
1
544 V (IC601, #1)
CH1 P-P = 544 V
CH1 RMS = 332.4 V
Verify voltages.
Содержание PG19lS
Страница 2: ...Samsung Electronics Co Ltd August 1999 Printed in Korea Code No BH68 00227A...
Страница 16: ...Memo 4 Alignment and Adjustments 4 8 PG17 PG19 PG21...
Страница 35: ...PG17 PG19 PG21 6 1 6 Exploded View and Parts List 6 1 PG17...
Страница 36: ...6 Exploded View Parts List 6 2 PG17 PG19 PG21 6 2 PG19...
Страница 37: ...6 Exploded View Parts List PG17 PG19 PG21 6 3 6 3 PG21...
Страница 38: ...6 Exploded View and Parts List 6 1 Front Cover CRT Ass y PG17 PG17 PG19 PG21 6 5...
Страница 39: ...6 2 Chassis Stand Ass y PG17 6 Exploded View Parts List 6 6 PG17 PG19 PG21...
Страница 40: ...6 3 Rear Cover Ass y PG17 6 Exploded View Parts List PG17 PG19 PG21 6 7...
Страница 41: ...6 Exploded View Parts List 6 8 PG17 PG19 PG21 6 4 Front Cover CRT Ass y PG19...
Страница 42: ...6 5 Chassis Stand Ass y PG19 6 Exploded View Parts List PG17 PG19 PG21 6 9...
Страница 43: ...6 6 Rear Cover Ass y PG19 6 Exploded View Parts List 6 10 PG17 PG19 PG21...
Страница 44: ...6 Exploded View Parts List PG17 PG19 PG21 6 11 6 7 Front Cover CRT Ass y PG21...
Страница 45: ...6 Exploded View Parts List 6 12 PG17 PG19 PG21 6 8 Chassis Stand Ass y PG21...
Страница 46: ...6 Exploded View Parts List PG17 PG19 PG21 6 13 6 9 Rear Cover Ass y PG21...
Страница 83: ...10 1 PG17 PG19 PG21 SW6 CN604 C603 R662 Q663 1 34 10 Schematic Diagrams 10 1 Power Part Schematic Diagram...
Страница 85: ...10 Schematic Diagrams 10 3 PG17 PG19 PG21 10 2 Micom Part Schematic Diagram 15 16...
Страница 93: ...10 Schematic Diagrams 10 11 PG17 PG19 PG21 10 6 Video Parts Schematic Diagram 17 21 20 19 18...