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HCD-GPX33/GPX55/GPX77/GPX88
21
MB Mount Diagnosis Flow (2/2)
END
Checks OUT
T
erminal 5V output of REG IC1009 or
,
Checks GND and OUT
T
erminal with
Tester
.
Is it shorted out?
Assembles into the unit again then ,checks
whether there is the audio output from
MB 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 MB Board
Replaces MB Board
A
B
Yes
Yes
Yes
Yes
No
No
No
No
Checks OUT
T
erminal -5V output of REG IC1010 or,
Checks GND and OUT
T
erminal with
Tester
.
Is it shorted out?
Leave MB to a state of it only and,
checks Power
Audio Driver (MOSFET) with
Tester
.
Is it shorted out?
（
Refer to Page 22).
Ver. 1.1
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