Magnavox 19ME601B Service Manual download pdf (Page 39)

8-8 FL11.0BTR

See FLOW CHART No.8 <P-ON+7V is not output.>

TUNER+5V is not output. (PANEL+13V is outputted normally.)

FLOW CHART NO.10

Is approximately +6.7V voltage supplied to the

collector of Q637?

Is approximately +6V voltage supplied to the

base of Q637?

Ye s

Check D659 and their periphery circuit, and service

it if defective.

Replace Q637.

P-ON+3.3V(PANEL+3.3V) is not output.

FLOW CHART NO.12

Is approximately +

5V voltage supplied to the

cathode of D639?

Is the "H" s

ignal (approximately +3.5V) inputted to

the

base of Q640?

Ye s

Check C639, D639 and their periphery circuit, and

service it if defective.

Check Q638, Q639, P-ON-H2 line an

d their periphery

circuit, and service it if defective.

FLOW CHART NO.13

Replace Q640.

P-ON+3V is not output.

FLOW CHART NO.11

Is approximately +3V voltage supplied to the

cathode of D638?

Ye s

Check if there is

any leak or short-circuit on

the loaded circuit, and ser

vice it if defective.

Check C638, D638 and their periphery circuit, and

service it if defective.

P-ON+9V is not output. (PANEL+13V is outputted normally.)

Is approximately +

13V voltage supplied to the

collector o

f Q641?

Is approximately +

10V voltage supplied to the

base of Q641?

Ye s

Check D666 and their periphery circuit, and service

it if defective.

Check C643, D

643 and their periphery circuit,

and service it if def

ective.

Replace Q641.

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Magnavox 19ME601B Service Manual Page 39

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