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PG17N*/PG19N*
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
Verify voltages.
1
368 V (IC601, #1)
CH1 P-P = 368 V
CH1 RMS = 154.6 V
Содержание PG19N
Страница 2: ...Samsung Electronics Co Ltd April 2000 Printed in Korea P N BH68 00129F 01...
Страница 17: ...Memo 4 Alignment and Adjustments 4 8 PG17N PG19N...
Страница 67: ...Memo 8 Block Diagrams 8 2 PG17N PG19N...
Страница 71: ...10 Schematic Diagrams 10 3 PG17N PG19N 10 2 Micom Part Schematic Diagram 4 6 3 5...
Страница 73: ...10 Schematic Diagrams 10 5 PG17N PG19N 10 3 H V Process Part Schematic Diagram 9 11 10 7 8...
Страница 75: ...10 Schematic Diagrams 10 7 PG17N PG19N 10 4 HORI VERTICAL Part Schematic Diagram L403 12 13 17 14 15 16...
Страница 77: ...10 Schematic Diagrams 10 9 PG17N PG19N 18 21 20 19 10 5 HIGH VOLTAGE Parts Schematic Diagram...
Страница 79: ...10 Schematic Diagrams 10 11 PG17N PG19N 10 6 Video Parts Schematic Diagram 17...
Страница 85: ...Memo 10 Schematic Diagrams 10 17 PG17N PG19N...