5 Troubleshooting
PG17N*/PG19N*
5-7
5-1-12 V Size or Pos. Variation Failure
IC261 Pin 12 output varies with
different DAC values?
Yes
Check some parts around IC301.
Check bias voltage.
Check and replace IC261 and IC301.
No
5-1-13 High Voltage Failure
Q524 gate driving pulse exist?
Check +12 V line.
Check and replace Q521, Q522, Q523,
Q524 and IC501.
Yes
No
Done
9
21
9
1.32 V (IC261, #12)
CH1 P-P = 1.32V
CH1 RMS =1.507 V
21
12.2 V (Q524, Gate)
CH1 P-P = 12.2 V
CH1 RMS = 5.30 V
Summary of Contents for PG17N
Page 2: ...Samsung Electronics Co Ltd April 2000 Printed in Korea P N BH68 00129F 01 ...
Page 17: ...Memo 4 Alignment and Adjustments 4 8 PG17N PG19N ...
Page 67: ...Memo 8 Block Diagrams 8 2 PG17N PG19N ...
Page 71: ...10 Schematic Diagrams 10 3 PG17N PG19N 10 2 Micom Part Schematic Diagram 4 6 3 5 ...
Page 73: ...10 Schematic Diagrams 10 5 PG17N PG19N 10 3 H V Process Part Schematic Diagram 9 11 10 7 8 ...
Page 77: ...10 Schematic Diagrams 10 9 PG17N PG19N 18 21 20 19 10 5 HIGH VOLTAGE Parts Schematic Diagram ...
Page 79: ...10 Schematic Diagrams 10 11 PG17N PG19N 10 6 Video Parts Schematic Diagram 17 ...
Page 85: ...Memo 10 Schematic Diagrams 10 17 PG17N PG19N ...