Zenith XBV 443, Service Manual

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3-32 3-33
NOTES) Symbol denotes AC ground.
NOTES) Symbol denotes DC chassis ground.
NOTE) Warning
NOTE) Parts that are shaded are critical
NOTE) With respect to risk of fire or
NOTE) electricial shock.
SR14370A
DVW-7000
(DVW-7000 Without)
(DVW-7000 Without)
CIRCUIT DIAGRAMS
1. POWER(SMPS) CIRCUIT DIAGRAM 1
Switching Error.
IC101 is defective.
Switching Error.
IC103, 102 are defective.
2.5V, 3.3V no power.
D111 is defective.
No Power.
F101 is defective.
5.3VA no power.
D112 is defective.
33V no power.
D113 is defective.
No power.
BD101, R101 are defective.
12VA no power.
D110 is defective.
IMPORTANT SAFETY NOTICE
WHEN SERVICING THIS CHASSIS, UNDER NO CIR-
CUMSTANCES SHOULD THE ORIGINAL DESIGN BE
MODIFIED OR ALTERED WITHOUT PERMISSION
FROM THE GO VIDEO ELECTRONICS CORPORA-
TION. ALL COMPONENTS SHOULD BE REPLACED
ONLY WITH TYPES IDENTICAL TO THOSE IN THE
ORIGINAL CIRCUIT. SPECIAL COMPONENTS ARE
SHADED ON THE SCHEMATIC FOR EASY IDENTIFI-
CATION.
THIS CIRCUIT DIAGRAM MAY OCCASIONALLY DIF-
FER FROM THE ACTUAL CIRCUIT USED. THIS WAY,
IMPLEMENTATION OF THE LATEST SAFETY AND
PERFORMANCE IMPROVEMENT CHANGES INTO
THE SET IS NOT DELAYED UNTIL THE NEW SERVICE
LITERATURE IS PRINTED.
NOTE :
1. Shaded( ) parts are critical for safety. Replace only
with specified part number.
2. Voltages are DC-measured with a digital voltmeter
during Play mode.