Sharp 21HM-10F Panduan Servis - Halaman 20

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Abnormal

Check R701 Q701.

and IC701

Abnormal

Check D758,IC702,IC753

and D762.

Normal

Check R615.

D1001 turns on

brightly and darkly.

(Bus error)

See many often D1001

flashes in red.

This indicates which IC to

check up.

TROUBLESHOOTING TABLES.

NO RASTER

Check F701.

Normal

Check T701 pin16 voltage.

(Approx. 290V at 220V AC)

Normal

Check Secondary Main+B.

(Approx. 110V)

Check CRT connector K1-

K5 bias.

Normal

Abnormal

Check

C878.

NVM

(IC1002)

TV PROCESSOR

(IC801)

TUNER

(TU201)

Blown out.

Replace the fuse.

The fuse is again blown out.

Check IC701,D701,D702,

D703,D704 and C705.

Normal

YES

D1001 (Power LED Bright Red)

turns on.

D1001 (Power LED Dark Red)

Check

turns on

IC801.

Checking the

protector circuit.

21HM-10F