(No.YA683<Rev.001>)1-19
+3.5V is not output.
FLOW CHART NO.13
Is approximately 3.5V voltage supplied to the cathode
of D906?
Check if there is any leak or short-circuit on the
loaded circuit, and service it if defective.
Ye s
Check D906, C907 and their periphery circuit, and
service it if defective.
No
P-ON+9V is not output.
FLOW CHART NO.15
Ye s
No
Is approximately 14V voltage supplied to the
collector of Q906?
Is approximately 10V voltage supplied to the
base of Q906?
No
See FLO
W CHART No.9
Ye s
Replace Q906.
Replace IC902.
P-ON+3.3V is not output.
FLOW CHART NO.14
Is approximately 5V voltage supp
lied to the Pi
n(1) of
IC902?
Ye s
Check D900, C900 and their periphery circuit, and
service it if defective.
Check D904, C904 and their pe
r
iphery circuit, and
service it if defective.
No
When pre
ssing each switches (SW201, S
W202,
SW203, SW
204, SW205, SW20
6, SW207) do the
voltage of P
in(1) on CN
104A increase?
Ye s
No
The key operation is not functioning.
FLOW CHART NO.16
Are the contact point and installation
state of the key
switches (SW201, SW202, SW203, SW204,
SW205, SW206, SW207) normal?
Re-install the switches (SW201, SW202, SW203,
SW204, SW205, SW206, SW207) correctly or
replace the poor switch.
No
Check the switches (SW201, SW202, SW203,
SW204, SW205, SW206, SW207) and their
periphery, and service it if defective.
Ye s
Replace Digital Main PWB Unit.
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