Sharp LC-10A3U Service Manual download pdf (Page 15)

15

LC-10A3U

SUPPLEMENT

TROUBLE SHOOTING TABLE (Continued)

No picture

at all

Yes

No

Are inputs

and outputs

of IC802 as

specified?

Check all the settings on the microprocessor

’s adjust process menu.

No picture

Check IC802

and its

peripheral

parts.

Yes

No

Are inputs

and outputs

of IC1201 as

specified?

Check

IC1201 and

its peripheral

parts.

No

Check IC1203,

IC1204 and

their peripheral

parts.

Are inputs

and output of

IC1203 and

IC1204 as

specified?

Yes

Check LCD

panel voltage

and

waveform.

No TV and

VIDEO 1

output

Yes

No

Are inputs

and outputs

of IC402 as

specified?

Check IC402

and its

peripheral

parts.

NO

Is input at Pin

(73) of IC802

as specified?

Check IC802,

AV1 line and

their

peripheral

parts.

No TV

output

Yes

No

Are voltages

at Pins (6),

(7) and (9) of

tuner as

specified?

Check the

power line.

Yes

No

Is output at

Pin (19) of

tuner as

specified?

Check the

tuner and its

peripheral

parts.

No

Is input at Pin

(1) of IC402

as specified?

Check the

line in

question.

Yes

Check IC402

and its

peripheral

parts.

Yes

No

Are Pins (2)

and (4) of

IC402 at “H”

and “L”

respectively?

Are Pins (65)

and (66) of

IC2001 at “H”

and “L”

respectively?

No VIDEO

1 output

YES

No

Is input at Pin

(1) of IC402

as specified?

Check the

line in

question.

Yes

No

Are Pins (1)

and (4) of

IC402 both at

“L”?

No VIDEO

2 output

No

Is input at Pin

(74) of IC802

as specified?

Check J3404,

AV line and

their

peripheral

parts.

No S

VIDEO

output

No

Are inputs at

Pins (71) and

(72) of IC802

as specified?

Check

SC3301, SY

line, SC line

and

peripheral

parts.

Are Pins (65)

and (66) of

IC2001 both

at “L”?

Check IC402

and its

peripheral

parts.

Yes

Check the

line in

question.

Yes

Check the

line in

question.

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