QT-CD700W
26
Yes
Yes
No
Yes
No
Yes
No
Yes
Yes
No
No
Yes
PIN 8
(FEN)
Does the optical pickup move up and down when the disc is
removed?
Is the following waveform output at the pin 8 (FEN) of IC101A
when the disc is set?
IC101A is faultly.
IC101A is faultly.
The optical pickup is faulty.
Check the periphery of IC101A and CN1. Is it normal?
Check as stated in item "FOCUS SERVO SAWTOOTH WAVE
FAILURE"
Is sawtooh wave output to the pin 19 (FDOUT) of IC101A ?
Is +8V applied to the pins 21 and 22 (VCC) of IC601?
CN1 connection failure or optical pickup failure.
Check the PWB pattern between CN1 and IC601.
Check the PWB pattern of IC601.
Check the PWB pattern of IC601.
Is sawtooth wave obtained between pins 17 and 18 of IC601?
Is sawtooth wave obtained between pins 3 and 4 of CN1? (as
shown above)
* Focus servo sawtooth wave fallure.
* Focus failure
1.5~2.5 sec
1.5~2.5 sec