DAEWOO DVS107W
Manual de Servicio

TROUBLE SHOOTING GUIDE

E-2. PREAMP IN THE PLAYBACK MODE
Is signal from heads fed to pin1 and 3 of P391?
YES NO

Check the DRUM and DECK mechanism

Is ON/OFF5V supplied to pin87 of IC301?
YES

NO

Check the ON/OFF 5V

Is REC(H) from pin79 of IC501 supplied to base of Q206(LOW)?
YES

NO

Check Pattern, IC501 and adjacent circuit

Is V.SW pulse from pin46 of IC501 supplied to pin11 of IC301?
YES

NO

Check SERVO/SYSCON

Is the signal from pin1 and 3 of P391 fed to pin82 or 85 of IC301?
YES

NO

Check P391and IC301

TO LUMINANCE SIGNAL IN THE REC

NOTE : 1) REC(H) : "HIGH" in the REC mode. "LOW" in the EE and PB mode

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