7 Troubleshooting
7-12
CHA42*7L/5**7L
7-2-8 S_Pin, Trap, Para, V_Lin, Pin_Bal Failure
Is IC401’s Pin 24 OK?
Yes
Check and replace IC401.
No
Does the PWM duty of
IC202’s Pin 17 vary, pressing tilt
and + or – key?
Check and replace
IC302, IC202.
No
No
Does the output voltage of
IC302’s Pin 1 vary, pressing tilt and
+ or – key?
Check and replace IC302, +13 V
and –12 V line.
Check and replace CRT.
Yes
Refer to 7-2-13 I
2
C Failure.
No
Key check (7-2-19)
7-2-9 Tilt Failure
Check tilt connector. (CN303)
Key check (7-2-19)
WAVEFORMS
8
8
1.12 V (IC401, #24)
CH1 P-P = 1.12 V
CH1 RMS = 3.094 V
Summary of Contents for CHA4217L
Page 2: ...Samsung Electronics Co Ltd August 1998 Printed in Korea Code No BH68 61127A ...
Page 10: ...Memo 3 Product Specifications 3 4 CHA42 7L 5 7L ...
Page 14: ...5 Disassembly and Reassembly 5 2 CHA42 7L 5 7L Memo ...
Page 62: ...9 Electrical Parts List 9 14 CHA42 7L 5 7L Memo ...