CD-SW440N
7 – 3
Check the TE waveform at pin 14 on U10.
(2) Tracking system check.
If the waveform shown in Figure 3 appears and soon after NO
DISC appears?
Yes
The tracking servo is not activated.
Check the peripheral circuits at pins 2, 3, 14 and 127 on U10,
pins 15, 16 and 26 on U12 and FFC.
No
"Initialization" is possible, but play is not possible?
Yes
A normal jump operation cannot be completed or the
beginning of the track cannot be found.
Check the around pin 127 on U10.
U10
U10
126
14
4
1
FOO
TEI
Figure 3
(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 4)
Yes
The spin driver circuit is OK.
No
2. The turntable doesn't rotate.
Check around pin 123 on U10, pins 17, 18 and 23 on U12.
Figure 4
1
5
U10
U10
126
123
FOO
DMO
Summary of Contents for CD-SW440N
Page 19: ...CD SW440N 6 3 Figure 6 2 MAIN SCHEMATIC DIAGRAM 2 6 7 8 9 10 11 12 ...
Page 22: ...CD SW440N 6 6 Figure 6 5 MAIN SCHEMATIC DIAGRAM 5 6 TO SERVO PWB 7 8 9 10 11 12 ...
Page 23: ...CD SW440N 6 7 Figure 6 6 MAIN SCHEMATIC DIAGRAM 6 6 L CH R CH 13 14 15 16 17 18 ...
Page 27: ...CD SW440N 6 11 Figure 6 10 DISPLAY TAPE SCHEMATIC DIAGRAM 2 2 7 8 9 10 11 12 ...
Page 29: ...CD SW440N 6 13 Figure 6 12 DISPLAY TAPE SCHEMATIC DIAGRAM 2 2 7 8 9 10 11 12 ...
Page 37: ...CD SW440N 6 21 Figure 6 20 iPod SCHEMATIC DIAGRAM 2 2 7 8 9 10 11 12 ...
Page 43: ...CD SW440N 6 27 Figure 6 26 WIRING SIDE OF MAIN PWB BOTTOM VIEW 2 2 JP24 7 8 9 10 11 12 ...
Page 45: ...CD SW440N 6 29 MEMO ...
Page 49: ...CD SW440N 6 33 Figure 6 31 WIRING SIDE OF DISPLAY TAPE PWB BOTTOM VIEW 2 2 7 8 9 10 11 12 ...