Zenith XBV243 series Service Manual page 15

TROUBLESHOOTING (CONTINUED)
(8) No -29VA.
No -29VA.
YES
Check or Replace
D108.
(10) No 3.3VA
No 3.3V
YES
N O
Is Vcc (4V) supplied
to IC103 Pin1?
YES
N O
Is the Q115 Base
"H"?
YES
Check or Replace
IC103, R156, C153.
VR168 - 923-03485
ELECTRICAL
Check or Replace
D111.
Check the Power
Control.
3-3
(9) No 8VA
NO 8VA.
YES
NO
Is Vcc (13V) supplied to
(+) terminal in D114?
YES
NO
Is Vcc (12V) supplied
to IC106 Pin1?
YES
NO
Is Q115 Base
"H"?
YES
Check or Replace
IC106, R170, C154.
(11) No 2.5V
NO 2.5VA.
YES
NO
Is Vcc (4V) supplied
to IC104 Pin1?
YES
NO
Is the Q115 Base
"H"?
YES
NO
Is Vcc (3.3V) supplied
to IC104 Pin2?
YES
Check or Replace
D119, C159.
Check or Replace
D110.
Check or Replace
D114.
Check the Power
Control.
Check or Replace
D111.
Check the Power
Control.
Check or Replace
Ic104.
D35E COMBO - ELECTRICAL