Troubleshooting Guide - Durabrand DTV1307 Service Manual

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 Q502 DC5V ?
Check Q502 and associated circuit.
Yes
Broken wire of R511 or short circuit
on GND.
Yes
Check the rectifying circuit.
Yes
Broken wire of L501.
Yes
Broken wire of F501.
E-1
Yes
No
A
D
Q502
S
Q503
Check Q503 and associated circuit.
T501
6
8
R520 R519
G
IC501
3
B
D502~D505
C
L501
E
F501
S501
CD501
R511