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