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1
A
NG
B
Is the Standby power available?
Check Pin 1 of the CN6401 on the
IR 232C Assy.
NG
C
Abnormality in
5.6-V Standby
power
D
Failure in the
EVENT microcomputer
E
F
44
1
2
Not controllable (Assys)
Can the unit be turned on?
Is 5.6-V power for microcomputers available?
Check Pins 2 and 3 of the CN6401 on
the IR 232C Assy.
OK
Abnormality in the 5.6-V power
system or poor connection
between microcomputers
Is the Event microcomputer active?
Check if the crystal oscillation is output from Pins
12 and 13 of IC6201 on the IR 232C Assy.
NG
Is the Power Key signal input?
Check if the signal is input to Pin 1 of the CN6401
on the IR 232C Assy.
NG
Poor connection in the periphery of
the front panel or defective unit
(Possible defective parts: POWER
SW, TACT, DISPLAY, PERCH PS,
PERCH DISP, IR 232C, and cables)
2
3
ON/OFF
repeatedly
NG
Abnormality in the STBY
5 OFF circuit or poor
connection
OK
Is the 1W WakeUP signal output?
Turn the unit off then back on, then check Pin
9 of the CN6401 on the IR 232C Assy.
Use of a digital oscilloscope is recommended
for checking.
NG
Failure in the
EVENT microcomputer
SC-09TX
3
4
OK
OK
C
OK
OK
Poor connection in the periphery
of the main (system) micro-
computer or defective unit
(Possible defective parts:
IR 232C, MOTHER 2, MOTHER 1,
and board connectors)
4
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