7 Troubleshooting
7-10
CHA42*7L/5**7L
7-2-4 S-correction Failure
7-2-5 H-Linearity Failure
Are S1 and S2 OK at IC202’s
Pins 14 and 15?
Replace
Q406, Q407.
Symptoms: Poor Horizontal linearity
– Corner: wide, Center: narrow or
– Corner: narrow, Center: wide
No
Are Q404 and Q405 OK?
Replace it.
Check and replace
Q406, Q407,
D406, D407, C422, C423, C424.
Check and replace
IC202.
Yes
Are Q406 and Q407 OK?
No
Yes
No
Yes
31 ~ 36
36 ~ 41
41 ~ 50
50 ~ 61
S1
0 V
0 V
5 V
5 V
S2
0 V
5 V
0 V
5 V
Table 7-1.
* As CRT vendor and inch, there are differential items like L401, C422, C423, C424, R426, R212.
If you want to change a PCB board to another one that is for different CRT and inch, you have to change
differential items at schematic diagram.
Are code nomber and polarity
of L402 right?
Check and replace it.
No
Yes
Are D401, C410, R416 OK?
Check and replace it.
Refer to 7-2-4 S-correction Failure.
No
Yes
Содержание CHA4217L
Страница 2: ...Samsung Electronics Co Ltd August 1998 Printed in Korea Code No BH68 61127A ...
Страница 10: ...Memo 3 Product Specifications 3 4 CHA42 7L 5 7L ...
Страница 14: ...5 Disassembly and Reassembly 5 2 CHA42 7L 5 7L Memo ...
Страница 62: ...9 Electrical Parts List 9 14 CHA42 7L 5 7L Memo ...
Страница 64: ...Memo 10 Block Diagrams 10 2 CHA42 7L 5 7L ...