Magnavox 26MF301B Manuel de service télécharger pdf (Page 28)

8-7 FL11.3TR

[ Audio Signal Section ]

Check SP801,SP802 and their periphery circuit,

and service it if defective.

Are the audio(L/R) signals inputted to the Pin

(1, 44)

of IC801?

Are the audio(L/R) signals inputted to the Pin

(3, 5)

of IC871?

Ye s

Audio is not outputted normally.(Audio input)

FLOW CHART NO.1

Are the audio(L/R) signals inputted to Pin(2, 15)

of IC771?

Check the line between Pin(2, 15) of IC771 and input

terminal(JK753, JK754), and service it if defective.

Ye s

Are the audio(L/R) signals outputte

d to the Pin(1, 2)

of CN801 and CN80

Are the audio(L/R) signals outputte

d to the audio

output terminal?

Check IC801 and their periphery circuit, and

service it if defective.

CN801: SP(L)

CN802: SP(R)

JK871: AUDIO(L)-OUT

JK872: AUDIO(R)-OUT

Ye s

Are the audio(L/R) signals inputted to each pin of

CN301?

Replace Digital Main CBA Unit.

Check the line b

etween Pin(6, 8) of CN301 and

Pin(1, 44) of IC801, and

service it if defec

tive.

Check the line between Pin(2, 4

) of CN301 and

Pin(3, 5) of IC871, and service it if defective.

Check the line between Pin(1

, 7) of IC871 and audio

output terminal(JK871, JK872), and ser

vice it if

defective.

Pin(6) :

Pin(8) :

Pin(2) :

Pin(4) :

AMP(L)-OUT

AMP(R)-OUT

AUDIO(L)-OUT

AUDIO(R)-OUT

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 69 70

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Magnavox 26MF301B Manuel de service Page 28

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