TT17J*
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.
• High voltage develops but no raster appears: Video output circuits.
• High voltage does not develop: Horizontal output circuits.
5-1-1 No Power Supply
Chirping noise exists?
Check and replace IC601.
Check and replace D601 and FH1
Done.
No
Yes
Repeating start?
Check and replace D606.
No
Yes
IC601 Pin 1 waveform is right?
Check and replace D614, IC601,
Q602, and ZD601.
Yes
No
C622 Voltage is 13 V ± 0.5V?
Check and replace IC201, IC301,
IC401, Q402, and Q404.
Yes
No
Operate normally?
Replace Main board.
Yes
Verify voltages.
Yes
No
WAVEFORMS
1
1
100 V (IC601, #1)
CH1 P-P = 100 V
CH1 RMS = 350.2 V
Summary of Contents for TT17J Series
Page 7: ...2 Product Specifications 2 4 TT17J Memo ...
Page 36: ...TT17J 6 1 6 Exploded View and Parts List ...
Page 37: ...Memo 6 Exploded View Parts List 6 2 TT17J ...
Page 38: ...TT17J 6 3 6 Exploded View and Parts List 6 1 Front Cover CRT Ass y ...
Page 39: ...6 Exploded View Parts List 6 4 TT17J 6 2 Chassis Stand Ass y ...
Page 40: ...6 Exploded View Parts List TT17J 6 5 6 3 Rear Cover Ass y ...
Page 41: ...Memo 6 Exploded View Parts List 6 6 TT17J ...
Page 59: ...Memo 8 Block Diagrams 8 2 TT17J ...
Page 61: ...Memo 9 Wiring Diagrams 9 2 TT17J ...
Page 64: ...10 Schematic Diagrams TT17J 10 3 17 19 16 20 15 20 22 24 10 2 Video Part Schematic Diagram ...
Page 66: ...10 Schematic Diagrams TT17J 10 5 10 3 Decoder Part Schematic Diagram ...
Page 67: ...10 Schematic Diagrams 10 6 TT17J 10 4 Jack Part Schematic Diagram ...
Page 68: ...10 Schematic Diagrams TT17J 10 7 10 5 Led Part Schematic Diagram ...