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HCD-GPX33/GPX55/GPX77/GPX88
21
D-AMP Mount Diagnosis Flow (2/2)
END
Checks OUT Terminal 5V output of REG IC1009 or,
Checks GND and OUT Terminal with Tester.
Is it shorted out?
Assembles into the unit again then ,checks
whether there is the audio output from
D-AMP Board.
Checks circumference circuit of REG IC1009.
If there are no problems, exchanges IC1009.
Checks circumference circuit of REG IC1010.
If there are no problems, exchanges IC1010.
Replaces D-AMP Board
Replaces D-AMP Board
A
B
Yes
Yes
Yes
Yes
No
No
No
No
Checks OUT Terminal -5V output of REG IC1010 or,
Checks GND and OUT Terminal with Tester.
Is it shorted out?
Leave D-AMP Mount to a state of it only and,
checks Power Audio Driver (MOS FET) with Tester.
Is it shorted out?
¢
Refer to Page 22).