7 Troubleshooting
7-4
CHA42*7L/5**7L
7-1-5 Unsynchronized image
Are H/V sync input on IC202’s
Pins 29 and 30?
Check the connection of signal cable.
Refer to 7-2-12 High Voltage Failure.
Yes
Check H/V sync input line.
No
7-1-6 Misconvergence
Spec in?
(Center : 0.3 mm, Cornor : 0.4 mm)
Readjust Misconvergence.
Done
Yes
Change CRT and readjust
Miconvergence and color.
No
Refer to 7-2-17 Micom
Failure.
No
Are H/V sync input on IC401’s
Pins 1 and 2?
Yes
Check and replace
IC401.
Yes
Check H/V sync input line.
No
Check and replace
IC202.
No
WAVEFORMS
24
26
25
27
24
5.28 V (IC202, #30)
CH1 P-P = 5.28 V
CH1 RMS = 1.218 V
25
4.96 V (IC202, #30)
CH1 P-P = 4.96 V
CH1 RMS = 350 mV
26
5.48 V (IC401, #1)
CH1 P-P = 5.48 V
CH1 RMS = 1.362 V
27
4.48 V (IC401, #2)
CH1 P-P = 4.48 V
CH1 RMS = 284 mV
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 ...