19
5. Color does not appear
Relevant circuit : Video amplifier circuit
Note
: Trouble in the blue circuit is shown in this diagram as representative color.
Refer to : when green does not appear, and when red does not appear.
Abnormal
Check
the input signal.
Check
the voltage of 12V
Check the
voltage of I201
24 pin
Check
the voltage of I201
18 pin
Check the
voltage of I301
13 pin
Check
the voltage of I202
1 pin
I203, Q22B
Trouble outside the
character monitor
D975, I971
I301, I101
I203, Q281, Q282
I201,I101
I202
(Change the DJ72 Video Board)
(Change the DJ72 Video Board)
Abnormal
Normal
0V
Normal (12V)
Abnormal
Abnormal
Normal (0~5V)
Normal (2~3V)
Normal (1.5~4.0V)
Normal (30~75V)
0V
(Change the DJ72 Main Board)
(Change the DJ72 Video Board)
(Change the DJ72 Video Board)
Содержание CM771ET
Страница 24: ... 24 WIRING DIAGRAM ...
Страница 43: ... 43 DISPLAY UNIT ASSEMBLY ...
Страница 47: ... 47 ...
Страница 48: ... 48 ...
Страница 53: ... 53 Attachment A Page 2 of 5 Photo 1 Head of solder tool Side view Photo 2 Head of solder tool Top view ...
Страница 56: ... 56 Attachment A Page 5 of 5 Photo 7 Melting top of VR knob Photo 8 Melting top of VR knob Done ...