Magnavox 26MF301B Manuel de service télécharger pdf (Page 26)

8-5 FL11.3TR

[ Video Signal Section ]

Is the "L" pulse sent out Pin(1) ter

minal of remote

control receiver (RS102) when the infrared remote

control is activated?

Check the line between Pin(1) terminal of remote

control receiver(RS102) and Pin(25) of CN301,

and service it if defective.

Ye s

Is the "L" pulse supplied to Pin(25

) of CN301?

Ye s

Is 3.3V voltage supplied to Pin(2) terminal of the

remote control receiver (RS102)?

FLOW CHART NO.2

Operation is pos

sible from the unit.

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

Replace the remote control receiver(RS102)

or the remote control unit.

Ye s

Replace Digital Main CBA Unit.

When pressing each switches (

SW101, SW103~

SW107

) do the voltage of

Pin(29) of CN302 increase?

Ye s

The key operation is not functioning.

FLOW CHART NO.1

Are the contact point and installation state of the key

switches (SW101, SW103~SW107) nor

mal?

Re-install the switches (SW101, SW103~SW107)

correctly or replace the poor switch.

Check the switches (SW101, SW103~SW107)

and their periphery circuit, and service it if defective.

Ye s

Replace Digital Main CBA Unit.

No operation is possible from the remote control unit.

Picture does not appear normally.(Video input)

FLOW CHART NO.3

Are the video signal inputted to Pin

(4) of CN302?

Ye s

Check the line b

etween Pin(4) of CN302 and

JK752, and service it if defective.

Is the "H" level

signal inputted to the Pin(5) of CN302?

Check JK751, R763 and their periphery circuit, and

service it if defective.

Replace Digital Main CBA Unit or LCD Module

Assembly.

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Magnavox 26MF301B Manuel de service Page 26

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