GX-CD5100W
7 – 3
Check the TE waveform at pin 16 on IC1.
(2) Focus-RF 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 15, 16 and 23 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 23 on IC1.
No
"Initialization" is not possible. Data cannot be read. Check the VCO-PLL (Pin26~30 on IC1)
system.
Figure 4
TE
FDO
(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
2. The turntable doesn't rotate. Check around pin 25 on IC1, pins 5 and 6 on CNP2.
Figure 5
FDO
SPDO
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