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ELECTRICAL TROUBLESHOOTING GUIDE - 9/10
C.
DISC IN
OPEN/CLOSE
Fig.3. FOCUS ERROR waveform NO FOCUS ON? YES
Check the focus error moving the lens up and down. (IC2A1 Pin 42)
NO
Check IC2A1 Pin 11,12,13,14 in DVD Mode IC201 no output : Pick-up is defective.
YES
Does the TTL level change at IC201 Pin 78 and 132 moving the lens?
NO Replace IC201.
YES
Replace ï½µ-COM or IC201.
NO Does the disc turn? YES
Check IC2M1 Pin 21, PMD03 Pin 5 turn when the IC2M1 Pin 21 is less than 2.2V.
Check IC201 and IC2M1 when PMD03 Pin 5 is abnormal
NO IC201 Pin169 is "High"? YES Check A
Is OK the track jump. YES
NO
Does the signal pulse appear at IC2A1 Pins 39, 29? YES
NO
IC2A1 is defective.
NO Does the screen appear? YES
Video Part is defective. Check "5.MPEG Circuit." Check "7.OSD/Video Circuit."
Replace ï½µ-COM part.
END
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