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ELECTRICAL TROUBLESHOOTING GUIDE OF CD PART
5-1. READING OK CHECK #A (= “NO DISC” DISPLAY)
5-2. READING OK CHECK #B (= “NO DISC” DISPLAY)
Defective IC400.
Defective IC400.
Defective IC401.
Defective IC401.
Defective IC400.
Defective CN401.
Defective pick-up sled motor.
Defective pick-up focus actuator.
Does
SL+ waveform
appear at (IC400 Pin13 & IC401 Pin3)
waveform#2 sled motor
wave
Does
FA+ waveform
appear at (IC400 Pin16 & IC401 Pin13)
waveform#3 focus coil
drive wave.
Does
SLIN waveform
appear at (IC400 Pin5)
waveform #2 sled dirve
wave
Does
FAIN waveform
appear at (IC400 Pin5)
waveform #3 focus dirve
wave
NO
NO
#A
#B
NO
NO
Check IC401 line.
Check connector
CN401 line.
NO
NO
YES
YES
YES
YES
YES
YES
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