Zenith DVD5201, Руководство по обслуживанию

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VR166 - 923-03461
18
DVD2 - SERVICING
ELECTRICAL
TROUBLESHOOTING
No 5V_D
or 5V_ A .
No 5.2VA.
Is 5.2VA section working?
(Is the POWER CT L at
Pin6 High/low?)
Is oscillation present at the
Base of Q108?
Replace Q108.
Check D109, C123, R125,
R124.
Replace R102.
Replace BD101.
(Bridge rectifier)
Is R102(R104) normal?
Is about AC 100V app;ied to
IC101 Pin 3.
Check IC101.
Is 5.2V applied to IC102
Pin 1?
Is there a DC voltage at the
(+) terminal of BD101?
Check R127, 128.
(SHUTDOWN CKT)
1. Power(SMPS) Circuit
No Display
Is 5.2VA section working?
Replace SMPS trans(T101).
Replace the inferior
components.
Are D109, L103 open?
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
A. B.
NO
NO