49
Does the Focus Coil Drive
signal appear at IC604 Pins
2, 3?
Replace IC604.
Replace MD Assembly.
(Focus Actuator is
defective.)
Replace MD Assembly.
(Pick-up is defective.)
Does DVD Disc rotate
normally?
Test the peripheral of
IC701. Is the frequency of
the X701 25.4MHz?
Check the IC402
(IC401 buffer) and IC702
(IC701 buffer) Vcc and
damage or not.
Replace IC404.
2.1V
YES
Does the DVD RF output at
the Pins 15, 16, 17, 18 of
PN201?
300mV
0V
Does the DVD RF input at
the Pin 48 of IC401?
2.0V
Replace IC401.
Replace X701.
NO
H
2.5V
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO