Magnavox 37MD359B Manuel de service télécharger pdf (Page 36)

9-2 A94F0TR

Check Q207, Q208, D205, P-ON-H1 line and their

peripher

y circuit, and service it if defec

tive.

LCD+24.5V is not output.

FLOW CHART NO.6

Is approximately +30V voltage supplied to the collector

of Q210?

Ye s

See FLOW CHART No.5 <AL+33V is not output.>

Replace Q209.

Is approximately +16V voltage supp

lied to the

base of Q209?

Ye s

Check Q207, Q208, D203, D204, D211 and their

periphery circuit, and ser

vice it if defective.

LCD+16V is not output.

FLOW CHART NO.7

Is approximately

+19V voltage supp

lied to the

collector of Q209?

Ye s

Replace Q501.

Is approximately +16V voltage supplied to the

base of Q501?

Ye s

Check Q207, Q208, D203, D204, D211

and their

periphery circuit, and ser

vice it if defective.

INV+16V is not output.

FLOW CHART NO.8

Is approximately +

19V voltage supplied to the

collector of Q501?

Ye s

Check C631, D631, D635

and their periphery circuit,

and service it if de

fective.

Check C631, D

631, D635 and their periphery circuit,

and service it if de

fective.

P-ON+7V is not output.

FLOW CHART NO.9

Is approximately +

7V voltage supplied to the

cathode of D646?

Check C644, D

646 and their periphery circuit,

and service it if def

ective.

Ye s

Check for short-circuiting or leak on the load circuit,

and service it if defective.

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Magnavox 37MD359B Manuel de service Page 36

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