- 4 -
Power source system 3
NO
YES
YES
NO
Turn on FAN and POWER
on the PCB-POWER TEST.
SW9AU power source
abnormality
YES
NO
Insert the lead wire.
PCB-MAIN
PCB-POWER
YES
YES
NO
YES
NO
NO
PCB-POWER
YES
NO
NO
YES
YES
NO
NO
PCB-POWER
PCB-AUDIO
YES
PCB-POWER
Remove the GN
connector form
the PCB-AUDIO.
Abnormal power source for SW
(SW3.3, SW15.5, SW5A, SW9AU)
Remove the PCB-MAIN
and connect the PCB-
POWER TEST.
Is the voltage of
the pin No. 6 of
the RF connector
3.3V?
Is the voltage of
the pin No. 4 of
the RD connector
15.5V?
Is the voltage of
the pin No. 2 of
the RD connector
5V?
Is the voltage
of the pin No. 2
of the GV
connector 9V?
Is the voltage
of the pin No.
2 of the RN
connector 9V?
Malfunction of IC953 or short
circuit around IC953.
Malfunction of Z950, Z951
or IC904, or short circuit
around them.
Malfunction of Z950, Z951
or IC906, or short circuit
around them.
Is the abnormality
caused by SW3.3
error?
Is the abnormality
caused by
SW15.5 error?
Is the abnormality
caused by SW5A
error?
Is the voltage of
pin the No. 2 of the
SV connector 9V?
Are RD-SD, RF-SF,
RN-GN and GV-SV
lead wires OK?
Malfunction of the
PCB-MAIN.
Remove the SV
connector from
the PCB-MAIN.
Malfunction of the
PCB-MAIN.
Malfunction of the
PCB-AUDIO.
Malfunction of IC3A1 or
short circuit around IC3A1.
