IF INITIAL READING IS NOT CARRIED OUT (WITH DISC)
Does disc motor Rotate? YES Is HF waveform output? IC401 pin22 Does PN404 pin2 voltage change when open/close? YES NO Is IC400 pin38 voltage transmitted?
3V
NO
CN401 connector defective.
NO IC400 Defective.
0V
YES Check the change of SL +, SL - Voltage. (IC802 pin 13, 14)
1.2V 0V 0.8V
NO
IC402 Defective.
YES PICK-UP defective.
Does laser light? YES Is FA+ waveform output at IC402 pin3? focus coil drive wareform. YES Is TE waveform output at IC401 pin11? TRACKING ERROR wareform. YES Is rotation normal?
