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XL-HF201P
4 – 3
Check the TE waveform at pin 16 on IC1.
(2) Tracking system check
If the waveform shown in Figure 4 appears and soon after NO
DISC appears?
Yes
The tracking servo is not activated.
Check the peripheral circuits at pins 98, 99, 101, 102 on IC1,
and FFC1.
No
"Initialization" is possible, but play is not possible?
Yes
A normal jump operation cannot be completed or the begin-
ning of the track cannot be found.
Check the
around pin 101 on IC1.
No
"Initialization" is not possible. Data cannot be read. Check the VCO-PLL (Pin125 ~128 on
IC1) system.
Figure 4
(3) Spin system check.
Press the OPEN/CLOSE switch without inserting a disc, and
then try starting the play operation.
1. The turntable rotates a little?
(Waveform drawing Figure 5)
Yes
The spin driver circuit is OK.
No
Check around pin 98 on IC1, pins 1 and 2 on CNP2.2. The turntable doesn't rotate.
Figure 5
TE
RFOUT
FDO
SPDO
63
118
IC1
IC1
4
7
102
98
IC1
IC1
1
3