Philips 32PFL4507/F8 Service Manual download pdf (Page 32)

8-3 PL12.2ATR

[Video Signal Section]

Is the "L" pulse sent ou

t Pin(1) terminal of remote

control receiver (RS4051) when the

infrared remote

control is activated?

Ye s

Is the "L" pulse supplied to Pin(5) of CN4001?

Ye s

Is approximately +3.3V voltage supplied to Pin(3)

terminal of the remote co

ntrol receiver (RS4051)?

FLOW CHART NO.2

Check AL+3.3V line and service it if defective.

Replace the remote control receiver (RS4051)

or the remote control unit.

Check the line between Pin(1) of remote control

receiver (RS4051) and Pin(5) of CN4001, and

service it if defective.

Ye s

Replace Digital Main CBA Unit.

When touching each buttons do the voltage of Pin(6)

of CN4001 decrease?

The key operation is not functioning.

FLOW CHART NO.1

Ye s Ye s

Replace Digital Main CBA Unit. Replace IC4001

or Function CBA.

Check AL+3.3V line and

service it if defective.

Is approximately +3.3V voltage supplied to Pin(1)

of CN4001?

No operation is possible from the remote control unit. (Operation is possible from the unit.)

Picture does not appear normally.

FLOW CHART NO.3

Is approximately +24V voltage supplied to Pin(13, 14)

of CN631?

approximately +

3.3V voltage sup

plied to Pin(11) of

CN631?

Digital Main CBA Unit or LCD Panel Asse

mbly may

be defective.

Check and replace these parts.

Ye s

Is approximately +21V voltage supplied to

Pin(16, 17, 22, 23) of CN631?

See FLOW CHART NO.5 <P-ON+21V is not output.

[Power Supply Section]>

See FLOW CHART NO.7 <AL+3.3V is not output.

[Power Supply Section]>

See FLOW CHART NO.6 <AMP+24V is not output.

[Power Supply Section]>

Ye s

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Philips 32PFL4507/F8 Service Manual Page 32

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