Product specifications

AN17K*/AN17L* 5-1

5 Troubleshooting

5-1 Parts Level Troubleshooting

Notes: Check the following circuits.

• No raster appears: Power circuit, Horizontal output circuit.

• High voltage develops but no raster appears: Video output circuits.

• High voltage does not develop: Horizontal output circuits.

5-1-1 No Power Supply

Chirping noise exists?

Check and replace IC601.

Check and replace D601 and FH1

Done.

Yes

Repeating start?

Check and replace D606.

Yes

IC601 Pin 1 waveform is right?

Check and replace Q602, IC601,

IC605 and IC602.

Yes

C622 Voltage is 13 V ± 0.5V?

Check and replace IC201, IC301,

IC605, IC401, Q402, Q404,

and 12V Regulafor circuit.

Yes

Normal operation?

Replace Main board.

Verify voltages.

WAVEFORMS

100 V (IC601, #1)

CH1 P-P = 100 V CH1 RMS = 350.2 V

CONFIDENTIAL