Sanyo HV-DX1E - Manual TV Station Tuning; Manual Tuning Procedure

3-3
ELECTRICAL TROUBLESHOOTING GUIDE
1. Power(SMPS) CIRCUIT
NO 5.3VA.
Replace the F101.
(Use the same Fuse)
Is the F101 normal?
Is the R101
normal?
Is the BD101
normal?
NO
NO
NO
NO
NO
NO
Replace the
BD101.
Replace the R101.
Is the D102
normal?
Check or Replace
the D102.
Replace the D112.
Replace the IC102.
YES
YES
YES
YES
YES
YES
YES
Is Vcc(8.5~21V) sup-
plied to IC101 Pin7?
NO
Is the D112 normal?
Is there about 2.5V
at the IC102 Vref?
Check the Main PCB
5.3VA/5.0V Line short?
(1) No 5.3VA (SYS/Hi-Fi/TUNER)
NO 12VA.
Check or Replace
the D110.
Is the Vcc(13V) supplied to (+)
terminal in D115 and D117?
Check or Replace
the Motor Vcc.
Is the Vcc(12V) supplied to (-)
terminal in D115 and D117?
NO
NO
Replace the D115,
D117.
YES
YES
YES
(2) No 12VA (TO CAP, DRUM MOTOR)
NO 5.2VA.
5.3VA Line Check.
Is 5.3VA put into
the Q116 Emitter?
Is about 5V put into
the Q116 Base?
Is the Q115 Base
“H”?
NO
NO
Check the Power
Control.
NO
Check or Replace the Q115,
R160, R161, R162, D122.
YES
YES
YES
Check or Replace
the Q115/Q116
YES
(3) No 5.2V (SYS/Hi-Fi/TUNER)