Magnavox 19MF301B Service Manual download pdf (Page 34)

8-3 FL11.0ATR

P-ON+3.3V is not output.

FLOW CHART NO.10

Is approximately +6.5V voltage supplied to Pin(1) of

IC631?

Is approximately +5.6V supplied to Pin(2) of IC631?

Ye s

Check C639, D639 and their periphery circuit, and

service it if defective.

Check Q638, Q639, P-ON-H2 line and their per

iphery

circuit, and service it if defective.

Replace IC631.

Check C636, D

636 and their periphery circuit, and

service it if defective.

Check Q202, Q203, D204, P-ON-H1 line and their

periphery circuit, and service it if def

ective.

Replace Q206.

Is approximately -11V voltage supplied to the

base of Q206?

Ye s

PANEL-7.1V is not output.

FLOW CHART NO.11

Is approximately -12V voltage supplied to the

anode of D636?

Ye s

Check if there is any leak or short-circuit on

the loaded circuit, and service it if defective.

AL+5V is not output.

FLOW CHART NO.9

Is approximately +6.5V voltage supplied to the

cathode of D639?

Ye s

Check C639, D639, D655, D657 and their periphery

circuit, and service it if defective.

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Magnavox 19MF301B Service Manual Page 34