7 Troubleshooting
CHA42*7L/5**7L
7-17
Does IC101’s output
(Pins 18, 21 and 23) vary, pressing
cont, brit key?
Replace IC101.
Yes
Yes
No
Does IC102’s output
(Pins 1, 3 and 5) vary, pressing
cont, brit key?
Replace IC102.
Yes
No
Check and replace Q101R, Q101G,
Q101B, Q102R, Q102G, Q102B,
Q103R, Q103G, Q103B.
Refer to 7-2-18 Key Check.
(Contrast, Brightness)
I
2
C check (7-2-13)
7-2-15 Invariable Contrast, Brightness Control
15
16
WAVEFORMS
15
3.16 V (IC101, #21)
CH1 P-P = 3.16 V
CH1 RMS = 1.008 V
16
43.2 V (IC102, #3)
CH1 P-P = 43.2 V
CH1 RMS = 63.56 V
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 ...