PN19MT/MO/IO
x178/19P2
5-1
5 Troubleshooting
5-1 Parts Level Troubleshooting
Notes:
Check the following circuits.
• No raster appears: Power circuit, Horizontal 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 D606, IC620,
D647, and D640.
Check and replace FG601, D601,
D701, Q701, IC601, and ZD601.
Done.
Yes
No
Repeating start?
Check and replace
D620, IC601 and IC701.
Yes
No
IC601 Pin 1 waveform is right?
Check and replace ZD705, ZD706, D702,
and also check the secondary diodes.
Yes
No
IC701 Pin 8 Voltage is right?
Replace Main board.
Yes
No
Operate normally?
Yes
Verify voltages.
WAVEFORMS
1
1
100 V (IC601, #1)
CH1 P-P = 100 V
CH1 RMS = 350.2 V
Содержание PN19MT
Страница 7: ...2 Product Specifications 2 4 PN19MT MO IO x178 19P2 Memo ...
Страница 17: ...Memo 4 Alignment and Adjustments 4 8 PN19MT MO IO x178 19P2 ...
Страница 36: ...PN19MT MO IO x178 19P2 6 1 6 Exploded View and Parts List 6 1 PN19MT ...
Страница 37: ...6 2 PN19MO 19P2 6 Exploded View Parts List 6 2 PN19MT MO IO x178 19P2 ...
Страница 38: ...6 Exploded View Parts List PN19MT MO IO x178 19P2 6 3 6 3 PN19IO ...
Страница 39: ...6 4 x178 6 Exploded View Parts List 6 4 PN19MT MO IO x178 19P2 ...
Страница 40: ...6 Exploded View and Parts List 6 1 1 Front Cover CRT Ass y PN19MT PN19MT MO IO x178 19P2 6 5 ...
Страница 41: ...6 1 2 Chassis Stand Ass y PN19MT 6 Exploded View Parts List 6 6 PN19MT MO IO x178 19P2 ...
Страница 42: ...6 2 1 Front Cover CRT Ass y PN19MO 19P2 6 Exploded View Parts List PN19MT MO IO x178 19P2 6 7 ...
Страница 43: ...6 2 2 Chassis Stand Ass y PN19MO 19P2 6 Exploded View Parts List 6 8 PN19MT MO IO x178 19P2 ...
Страница 44: ...6 3 1 Front Cover CRT Ass y PN19IO 6 Exploded View Parts List PN19MT MO IO x178 19P2 6 9 ...
Страница 45: ...6 3 2 Chassis Stand Ass y PN19IO 6 Exploded View Parts List 6 10 PN19MT MO IO x178 19P2 ...
Страница 46: ...6 4 1 Front Cover CRT Ass y x178 6 Exploded View Parts List PN19MT MO IO x178 19P2 6 11 ...
Страница 47: ...6 4 2 Chassis Stand Ass y x178 6 Exploded View Parts List 6 12 PN19MT MO IO x178 19P2 ...
Страница 107: ...7 Electrical Parts List 7 60 PN19MT MO IO x178 19P2 Memo ...
Страница 108: ...8 Block Diagrams PN19MT MO IO x178 19P2 8 1 ...
Страница 109: ...Memo 8 Block Diagrams 8 2 PN19MT MO IO x178 19P2 ...
Страница 110: ...9 PCB Diagrams 9 1 Component Diagram Main PN19MT MO IO x178 19P2 9 1 ...
Страница 111: ...9 2 Pattern Diagram Main 9 PCB Diagrams 9 2 PN19MT MO IO x178 19P2 ...
Страница 112: ...9 3 Component Diagram Video 9 PCB Diagrams PN19MT MO IO x178 19P2 9 3 ...
Страница 113: ...9 PCB Diagrams 9 4 PN19MT MO IO x178 19P2 9 4 Pattern Diagram Video ...
Страница 115: ...Memo 10 Wiring Diagrams 10 2 PN19MT MO IO x178 19P2 ...
Страница 122: ...11 Schematic Diagrams PN19MT MO IO x178 19P2 11 7 OP1 CN202 CN203 11 7 Connector Part Schematic Diagram PN19M IO ...
Страница 127: ...11 Schematic Diagrams 11 12 PN19MT MO IO x178 19P2 Memo ...