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NO POWER
Is the voltage at the point (A)
in the Figure DC144V ?
No
Is the voltage at the point (B)
in the Figure DC164V ?
No
Is the voltage at the point (C)
in the Figure AC120V ?
No
Is the voltage at the point (E)
in the Figure AC120V ?
No
Is the voltage on both
ends of S501 AC120V ?
No
Broken wire of AC cord or check
S501.
TROUBLESHOOTING GUIDE
Yes
Is the voltage at pin G
of Q501 DC5V ?
Check Q502 and associated circuit.
Yes
Check R501 and check associated
circuit.
Yes
Check the rectifying circuit.
Yes
Broken wire of L501.
Yes
Broken wire of F501.
E-1
Yes
No
A
D
Q501
S
Q502
Check Q501 and associated circuit.
T502
5
8
R503
G
IC501
3
B
D501~D504
C
L501
E
F501
S501
CD501
R501
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