QT-CD700W
25
Yes
Yes
Yes
NO
Yes
NO
Yes
NO
Yes
NO
Yes
Check the power supply, 16.93 MHz clock , and reset
terminal.
Check the pickup-in limit switch position.
Check the Focus system.
* Laser failure
IC +3.3V applied to the emitter of Q601.
IC +3.3V applied to the collector of Q601.
IC +3.3V applied to the pin 48 (VDD) of IC 201A?
Is approx. 2.38V applied to the collector of Q101A?
Check CN1. If it is normal, the optical pickup is faulty.
Check the peripheral parts of IC 201A. If it is normal, the
optical pickup is faulty.
Check the PWB pattern between collector of Q601 and pin 48
of IC201A.
Check the peripheral parts of IC 601 and Q601.
Check the PWB pattern or Q601.
The CD operating keys don't work.
* The CD function will not work.