TV board troubleshooting

No picture but have raster.

Measure the waveform of

R.G.B Hors, Vers at X7.

Check whether N1 has

5V power supply.

Check whether X9 pin 1, pin 2 have

5V power input.

Replace N2

Replace V105-V17.

Replace N1

Measure N1 pin 33, pin 35

waveform.

Measure N1 pin 42, pin 44

waveform.

Check V105-V107's

output waveform.

No

Yes

Yes

Yes

No

No

No

No

No

24

HLT-1751

HLT-2051-01

HLT-2051-02