MASTER CLOCK SYSTEM WAVEFORM
AUDIO DATA CLOCK SYSTEM WAVEFORM
b
a
A
Video read clock
Write reference clock
Audio bit clock
2.4V
T=0.037 s
T=0.354 s
T=0.5 s
3.0V
6.2V
F=27MHz
F=2.822MHz
F=2MHz
Diagnostic Procedures by Symptom
Symptom
CD-DA
Video-CD
Likely Location Fault
TOC NG
Turntable fails to rotate.
Turntable rotates.
Audio normal
Audio normal
TOC OK, counter OK, but no
sound
TOC NG (both audio and video
are NG.) Blue black display.
Fails to rotate.
Rotates.
Audio normal, Video NG.
No sound, Video NG.
TOC OK, counter OK, but no
sound and video NG.
For TOC NG, fault in the CD servo circuit.
IC701, IC702, IC703, or traverse system.
Traverse system, focus servo system (IC701,IC703), supply
line, clock line system control.
Traverse system, tracking servo system/ CLV servo system/
traverse servo system (IC701, IC702, IC703)
IC1000
IC1000
CD disc other than DV “Karaoke” soft, video CD and CD-DA.
