LG / GOLDSTAR L399
Manual de Servicio

3. Y/C CIRCUIT (4) When the Video signal doesn�t appear on the screen in REC Mode,
NO

Is the EE signal normal? YES Is 5.2V/5.3VA applied to the IC301 Pins 24,42,55,72,91? YES Does PB Mdoe operate normally? YES Does the RF signal appear at the IC301 Pin 78?

Check EE Mode.

NO

Check the line of the 5.2V/ 5.3VA Line.(Power Circuit)

NO

Check PB Mode.

NO

Is the REC �H� signal (about 4V) applied to the IC301 Pin 80? YES

NO

Check the System of REC �H�. (the IC501 Pin 74 / the D301)

YES

Check REC Luminance Pass & Color Pass.

YES

Replace the IC301.

Does the REC RF signal appear at the IC301 Pins 88,89,94,95? YES Check the Drum & Drum Connector

NO

Check the circuit of the IC301 Pins 85, 86.

YES

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