Zenith XBS344 Series Service Manual page 17

(4) No 5V (TO DVD)
NO 5V.
YES
NO
Is 5.3VA put into
the Q160 Emitter?
YES
NO
Is the Q162 Base
"H"?
YES
NO
Is about 5V put into
the Q160 Base?
YES
Check or Replace
the Q162/Q160
(6) No REG 12V
No REG 12V.
YES
NO
Is 13V put into the
Q156 Collector?
YES
NO
Is 13V put into the
R153 Base?
YES
Check or Replace the Q156,
ZD103, R153, C151.
5.3VA Line Check.
Check the Power
Control.
Check or Replace the
Q162, R157, R158, R159.
Check or Replace
D110.
Check 33V Line.
3-5
(5) No 33V (TUNER)
No 33V.
YES
NO
Is Q163 Base "H"?
YES
Check or Replace
Q161, R154, R155.
(7) No 8V(TO DVD)
NO 8V.
YES
NO
Is Vcc(13V) supplied to
(+) terminal in D114?
YES
NO
Is Vcc(12V) supplied
to IC151 Pin1?
YES
NO
Is the Q162 Base
"H"?
YES
Check or Replace
IC151, R170, C154.
Check the Power
Control.
Check or Replace
the D110.
Check or Replace
the D114.
Check the Power
Control.