CD-C607H/611H
Y Check the tracking system.
Check waveform of IC1 pin 7 (TE).
The waveform shown in Fig.Tracking servo isCheck the periphery of IC 1
39-1 appears, and no-discYesinoperative.pin 8 to pin 15, and IC 5 toYes
state appears soon.CNP2.
Play is possible inThe unit will be initializedNormal jump is impeded,Check the periphery
Yes
TEST mode.in Normal mode,but it willYesand the program top Yesof IC 1 pin 14.
not playback..cannot be reached.
5ms
Data cannot be read.Check the VCO-PLL system.1.00 V4
YesIC1 7 TE
5 ms
5.0 V
IC1 54 DRF3
Figure 39-1
Y Checking the spin system.
Play operation is performed without disc.
Yes
The turntable rotates a little.The spin driver circuit is normal.
Yes
No
The turntable fails to rotate or rotates at high speed.Check the periphery of IC1 pins 23 to 27, pin 39, and pin 40, IC2
Yespin 12 and pin 13, IC3 to CNP3.
Y Checking the VCO-PLL system
Play operation is performed when disc exits.
Yes
Although HF waveform is normal, TOC data cannot be read.Check PDO waveform (Fig. 39-2).
Yes
Abnormal
Check the IC1 pins 43 and 44, IC2 pins 3, 5, 7, 10, and 11.
Stop --> Play
As VCO frequency
is locked at 4.32 MHz,
voltage of PDO rises and
stabilizes.
0.5s
1.00 V
2
IC2 3 PDO
0.5s
1.00 V
IC1 16 FD
3
Figure 39-2
Y Although HF waveform is normal and the time
indication is normal, no sound is emitted.
Check IC2 pin 48 (EFLG).Usually, the number of pulses of flawless disc is 100 pulses/sec
Noor less.
Yes
Check IC2 pins 37, 40.
Abnomal
Check IC401 and POWER AMP. IC601.
� 39 � |
ACEC
