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PN22N*
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 FH601, D601,
Q601, Q604, and IC611.
Done.
Repeating start?
Done.
No
Yes
IC611 Drain waveform is right?
Check and replace IC611.
Yes
No
Q601 Drain waveform is right?
Check IC601 and D602.
Yes
No
Q604 Drain waveform is right?
Check IC602 and IC603.
Yes
No
WAVEFORMS
5
2
Q601 Drain
CH1 RMS = 226.0V
4
Q604 Drain
CH1 RMS =434.4V
5
IC611 Drain
CH1 RMS = 333.2V
2
4
Содержание PN22N series
Страница 2: ...Samsung Electronics Co Ltd October 2000 Printed in Korea P N BH68 00362A 01 ...
Страница 18: ...Memo 4 Alignment and Adjustments 4 8 PN22N ...
Страница 38: ...PN22N 6 1 6 Exploded View and Parts List PN22N ...
Страница 39: ...Memo 6 Exploded View Parts List 6 2 PN22N ...
Страница 40: ...PN22N 6 Exploded View and Parts List 6 1 Front Cover CRT Ass y 6 3 ...
Страница 41: ...6 2 Chassis Stand Ass y 6 Exploded View Parts List 6 4 PN22N ...
Страница 42: ...6 3 Rear Cover Ass y 6 Exploded View Parts List PN22N 6 5 ...
Страница 83: ...Memo 8 Block Diagrams 8 2 PN22N ...
Страница 84: ...9 Wiring Diagram PN22N 9 1 9 Wiring Diagram ...
Страница 87: ...10 Schematic Diagrams 10 3 PN22N 10 3 D Convergence Purity Part Schematic Diagram ...
Страница 93: ...10 Schematic Diagrams 10 9 PN22N 10 7 Purity Parts Schematic Diagram ...
Страница 97: ...10 Schematic Diagrams 10 13 PN22N 10 9 DSP USB Part Schematic Diagram ...
Страница 98: ...10 Schematic Diagrams PN22N 10 14 Memo ...