HCD-GPX555/GPX888
21
DAMP/MB Mount Diagnosis Flow (2/2)
END
Checks OUT
T
erminal 5V output of REG IC1000 or
,
c
hecks GND and OUT
T
erminal with
Te
ster
.
Is it shorted out?
Assembles into the unit again then, checks
whether there is the audio output from
DAMP Board.
Checks circumference circuit of REG IC1000.
If there are no problems, exchanges IC1000.
Checks circumference circuit of REG IC1001.
If there are no problems, exchanges IC1001.
Replaces DAMP Board
Replaces DAMP Board
A
B
Yes
Yes
Yes
Yes
No
No
No
No
Checks OUT
T
erminal -5V output of REG IC1001 or,
checks GND and OUT
T
erminal with
Te
ster
.
Is it shorted out?
Leave DAMP to a state of it only and, checks
Power
Audio Driver (MOSFET) with T
ester
.
Is it shorted out? (Refer to Page 22.)
DAMP Board
