Sharp LC-10A3U Service Manual download pdf (Page 17)

17

LC-10A3U

SUPPLEMENT

TROUBLE SHOOTING TABLE (Continued)

No sound

from

speakers

Yes

No

Is Pin (53) of

IC2001 at “L”?

Check all the settings on the microprocessor

’s adjust process menu.

No sound

No

Are outputs at

Pins (1) and (7)

of IC903 as

specified?

Yes

No

Are inputs and

outputs of

IC303 as

specified?

Yes

No

Are inputs at

Pins (5) and (8)

as well as

outputs at Pins

(2) and (11), all

of IC301, as

specified?

Muting effect is

on. Check the

FSMU line.

Check IC901,

IC903 and their

peripheral

parts.

Check IC303

and its

peripheral

parts.

Check the line

in question,

IC303 and its

peripheral

parts.

Yes

Check the

speakers and

their peripheral

parts.

No sound

from

headphone

Yes

No

Is Pin (55) of

IC2001 at “L”?

Check the

headphone and

its peripheral

parts.

Check Q306,

J3404 and their

peripheral

parts.

No sound

from output

line

Yes

No

Is Pin (52) of

IC2001 at “L”?

No

Are outputs at

Pins (1) and (7)

of IC902 as

specified?

Yes

Check the line

in question.

Check the

LMUTE line.

Check IC902

and its

peripheral

parts.

TV sound

failure

Yes

No

Is output at Pin

(16) of tuner as

specified?

No

Is input at Pin

(60) of IC901

as specified?

Check the

tuner and its

peripheral

parts.

Check IC901,

Q3301, Q3204,

Q3205 and

their peripheral

parts.

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