Sharp CD-C471 W User Manual

CD-C471 W
* Checking the spin system,
Play operation is performed without disc.
The turntable rotates a little.
The spin driver circuit is normal.
The turntable fails to rotat
Check the periphery of
ICl pins 23 to 27, pin 39, and
pin 40, IC2
pin 12 and pin 13, IC3 to CNPB.
Play operation is performed when disc exits.
Although HF waveform is n
Yes
Check PDO waveform (Fig. 43).
I
Abnormal
Check the ICl pins 43 and 44, IC2 pins 3. 5. 7, 10, and 11.
1 .oo v
lC2 @ PDO
0.5s
l.OOV
IC2 @ FD
j stop --> Play
As VCO freque-
ncy is locked at
ill I
I
I I I
4.32 M Hz, voltage
of PDO rises and
stabilizes.
Figure 43
Check IC 2 pin 48 (EFLG).
Usually, the number of pulses of flawless disc is 100 pulsesisec
or less.
Check IC2 pins 37,40.
Abnomal
Check IC 601 and POWER AMP IC 901,
- 43 -

Sharp CD-C471 W Specifications

General

Brand	Sharp
Model	CD-C471 W
Category	Stereo System
Language	English