5 Troubleshooting
PN19MT/MO/IO
x178/19P2
5-7
5-1-13 High Voltage Failure
Q504 Gate driving pulse exists?
Check +12V line.
Check and replace IC501, Q521,
Q502, Q503, and Q504.
Yes
No
Adjust the H/V Value
using the jig program.
Done
WAVEFORMS
5-1-12 V Size or Position Variation Failure
IC250 Pin 23 output varies with
different DAC values?
Yes
Check and replace IC301.
Check the Vias Voltage.
Check and replace IC250 and IC301.
No
12
10
10
1.32 V (IC250, #23)
CH1 P-P = 1.32V
CH1 RMS = 1.507 V
WAVEFORMS
12
12.2 V (Q504, Gate)
CH1 P-P = 12.2V
CH1 RMS = 5.30V
Summary of Contents for PN19MT
Page 7: ...2 Product Specifications 2 4 PN19MT MO IO x178 19P2 Memo ...
Page 17: ...Memo 4 Alignment and Adjustments 4 8 PN19MT MO IO x178 19P2 ...
Page 36: ...PN19MT MO IO x178 19P2 6 1 6 Exploded View and Parts List 6 1 PN19MT ...
Page 37: ...6 2 PN19MO 19P2 6 Exploded View Parts List 6 2 PN19MT MO IO x178 19P2 ...
Page 38: ...6 Exploded View Parts List PN19MT MO IO x178 19P2 6 3 6 3 PN19IO ...
Page 39: ...6 4 x178 6 Exploded View Parts List 6 4 PN19MT MO IO x178 19P2 ...
Page 40: ...6 Exploded View and Parts List 6 1 1 Front Cover CRT Ass y PN19MT PN19MT MO IO x178 19P2 6 5 ...
Page 41: ...6 1 2 Chassis Stand Ass y PN19MT 6 Exploded View Parts List 6 6 PN19MT MO IO x178 19P2 ...
Page 42: ...6 2 1 Front Cover CRT Ass y PN19MO 19P2 6 Exploded View Parts List PN19MT MO IO x178 19P2 6 7 ...
Page 43: ...6 2 2 Chassis Stand Ass y PN19MO 19P2 6 Exploded View Parts List 6 8 PN19MT MO IO x178 19P2 ...
Page 44: ...6 3 1 Front Cover CRT Ass y PN19IO 6 Exploded View Parts List PN19MT MO IO x178 19P2 6 9 ...
Page 45: ...6 3 2 Chassis Stand Ass y PN19IO 6 Exploded View Parts List 6 10 PN19MT MO IO x178 19P2 ...
Page 46: ...6 4 1 Front Cover CRT Ass y x178 6 Exploded View Parts List PN19MT MO IO x178 19P2 6 11 ...
Page 47: ...6 4 2 Chassis Stand Ass y x178 6 Exploded View Parts List 6 12 PN19MT MO IO x178 19P2 ...
Page 107: ...7 Electrical Parts List 7 60 PN19MT MO IO x178 19P2 Memo ...
Page 108: ...8 Block Diagrams PN19MT MO IO x178 19P2 8 1 ...
Page 109: ...Memo 8 Block Diagrams 8 2 PN19MT MO IO x178 19P2 ...
Page 110: ...9 PCB Diagrams 9 1 Component Diagram Main PN19MT MO IO x178 19P2 9 1 ...
Page 111: ...9 2 Pattern Diagram Main 9 PCB Diagrams 9 2 PN19MT MO IO x178 19P2 ...
Page 112: ...9 3 Component Diagram Video 9 PCB Diagrams PN19MT MO IO x178 19P2 9 3 ...
Page 113: ...9 PCB Diagrams 9 4 PN19MT MO IO x178 19P2 9 4 Pattern Diagram Video ...
Page 115: ...Memo 10 Wiring Diagrams 10 2 PN19MT MO IO x178 19P2 ...
Page 127: ...11 Schematic Diagrams 11 12 PN19MT MO IO x178 19P2 Memo ...