Check waveform of ICl pin 7 (TE).
--+
The waveform shown in Fig.16
appears, and no-disc state apperas
soon.
Check the periphery of
IC
1
;i;n6;o
pin 15, and
IC
5 to
Although IL is possible, play is impossible.
I
Yes
Check the periphery of
program top cannot
be reached.
I
I
Data cannot be read.
Check the VCO-PLL system.
5ms
1.00
v
ICI
@TE
5 ms
5.0
v
ICI
@j)
DRF
Figure 16
Play operation is performed without disc.
1
Yes
+
The turntable rotates a little.
The spin driver circuit is normal.
The turntable fails to rotate or rotates at
high speed.
Check the periphery of ICl pins 23 to 27, pin 39, and pin 40,
IC2
pin 13 and pin 14,
IC5
to
CNPS.
-
16-
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