Table of Contents
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• "No Disc" is displayed during CD playback (when DVD is playable) ... When CD laser does not light up.
Is control signal output from pin 17 of IC3101 ?
Is voltage of 5 V applied to the emitter of Q3104 ?
Is voltage of approx. 1.9 V supplied to pin 6 of CN3001 ?
Check connection of optical pickup cables.
If no abnormality is detected, replace optical pickup mechanism
unit.
Both video and audio do not operate normally.
Put a disc on the DISC tray.
Yes
Disc normally loaded?
Yes
Is RF signal level output from pin 17 of
CN3001 normal ?
Yes
Replace Servo PWB.
Yes
Refer to "Video is not output normally" and
"Audio is not output normally".
Yes
Yes
Yes
No
No
No
No
Check and replace IC3101.
No
Check S5V line.
No
Check around Q3102 and Q3104.
Note: The laser diode is easily damaged by static electricity.
Carefully check static electricity and electric leak of the measuring
instrument.
Check loading switch.
Is objective lens of optical pickups clean?
Replace optical pickup mechanism unit.
7 – 3
CD-SW250DVD
Yes
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