Sharp SX76NF8, Service Manual

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SX76NF8
10
TROUBLE SHOOTING TABLE
NO FUNCTION (NO SOUND AND NO PICTURE)
Is D2201(LED) on a light?
Check IC 1001 94pin INPUT
Check C755 Voltage
Immediately appear approx. 145V, and turn to 0V soon.
Check C752 Voltage
Check C715Voltage
Refer to "No Picture", trouble shooting
Check IC701, Q702 and T703
Check IC1001, IC1003, IC301, IC201, TU201(Refer to LED FLASHING CODES)
GREEN
RED
Approx. 320V
Completely 0V
No Input Pulse
FLASHIN
Check D754 and IC751
Check Vertical Circuit
Check Q1012, D1016 and SP wire "SS" connection.
0V
Check R718, F2001 and "AA" connection
0V
Green Green Green Red Red Red
No Light
Immediately appear approx. 8V, and turn to 0V soon. Check D752, D753, C756, C757 and IC752
LED FLASHING CODES If the TV set does not work and the power LED is flashing "Red <=>Green", follow the sequence according to the information below, as a guide to fault finding. 1.Unable to read or write into NMV;66% Green,33% Red twice and Red for a second. 2.MSP failure;66% Green,33% Red for three times and Red for a second. 3.VCT failure;66% Green,33% Red for four times and Red for a second.