Toshiba SD-33VB, Service Manual

Page: 54 / 197

3-5
NO 5V.
5.3VA Line Check.
Is 5.3VA put into
the Q160 Emitter?
Is about 5V put into
the Q160 Base?
Is the Q162 Base
“H”?
NO
NO
NO
Check the Power
Control.
Check or Replace the Q162,
R157, R158, R159, D121.
YES
YES
YES
YES
Check or Replace
the Q162/Q160
(4) No 5V (TO DVD)
No 33V.
Check the
Timer’H’ Signal.
Is Timer H “L”?
Check or Replace
Q161, R154, R155.
NO
YES
YES
(5) No 33V (TUNER)
No REG 12V.
Check or Replace
D110. Is 13V put into the
Q156 Collector?
Is 13V put into the
R153 Base?
NO
Check 33V Line.
NO
YES
YES
Check or Replace the Q156,
ZD103, R153, C151.
YES
(6) No REG 12V
NO 8V.
Check or Replace
the D110.
Is Vcc(13V) supplied to
(+) terminal in D114?
Is the Q162 Base
“H”?
Is Vcc(12V) supplied
to IC151 Pin1?
NO
NO
Check or Replace
the D114.
NO
Check the Power
Control.
YES
YES
YES
Check or Replace
IC151, R170, C154.
YES
(7) No 8V(TO DVD)