CD-DK890N
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
IC1
IC1
TE
16
RFOUT
2
3
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
2. The turntable doesn't rotate.
Check around pin 25 on IC1, pins 1 and 2 on CNP2.
Figure 5
IC1
IC1
22
25
5
1
FDO
SPDO
Summary of Contents for CD-DK890N
Page 15: ...CD DK890N 5 4 MEMO ...
Page 18: ...CD DK890N 6 3 Figure 6 2 MAIN SCHEMATIC DIAGRAM 2 6 7 8 9 10 11 12 ...
Page 19: ...CD DK890N 6 4 Figure 6 3 MAIN SCHEMATIC DIAGRAM 3 6 WZX11AW 13 14 15 16 17 18 ...
Page 20: ...CD DK890N 6 5 Figure 6 4 MAIN SCHEMATIC DIAGRAM 4 6 A B C D E F G H 1 2 3 4 5 6 ...
Page 21: ...CD DK890N 6 6 Figure 6 5 MAIN SCHEMATIC DIAGRAM 5 6 7 8 9 10 11 12 ...
Page 22: ...CD DK890N 6 7 Figure 6 6 MAIN SCHEMATIC DIAGRAM 6 6 WZX11AW WZX21AW 13 14 15 16 17 18 ...
Page 26: ...CD DK890N 6 11 Figure 6 10 DISPLAY SCHEMATIC DIAGRAM 2 6 NC NC NC NC 7 8 9 10 11 12 ...
Page 27: ...CD DK890N 6 12 Figure 6 11 DISPLAY SCHEMATIC DIAGRAM 3 6 NC 13 14 15 16 17 18 ...
Page 29: ...CD DK890N 6 14 Figure 6 13 DISPLAY SCHEMATIC DIAGRAM 5 6 NC NC NC NC 7 8 9 10 11 12 ...
Page 30: ...CD DK890N 6 15 Figure 6 14 DISPLAY SCHEMATIC DIAGRAM 6 6 NC 13 14 15 16 17 18 ...
Page 32: ...CD DK890N 6 17 Figure 6 16 iPOD SCHEMATIC DIAGRAM 2 2 7 8 9 10 11 12 ...
Page 33: ...CD DK890N 6 18 Figure 6 17 CD SCHEMATIC DIAGRAM 1 6 CD PWB D A B C D E F G H 1 2 3 4 5 6 ...
Page 35: ...CD DK890N 6 20 Figure 6 19 CD SCHEMATIC DIAGRAM 3 6 13 14 15 16 17 18 ...
Page 36: ...CD DK890N 6 21 Figure 6 20 CD SCHEMATIC DIAGRAM 4 6 A B C D E F G H 1 2 3 4 5 6 ...
Page 37: ...CD DK890N 6 22 Figure 6 21 CD SCHEMATIC DIAGRAM 5 6 NC NC NC 7 8 9 10 11 12 ...
Page 38: ...CD DK890N 6 23 Figure 6 22 CD SCHEMATIC DIAGRAM 6 6 13 14 15 16 17 18 ...
Page 44: ...CD DK890N 6 29 Figure 6 28 WIRING SIDE OF MAIN PWB BOTTOM VIEW 2 2 ...
Page 46: ...CD DK890N 6 31 MEMO ...
Page 50: ...CD DK890N 6 35 Figure 6 33 WIRING SIDE OF DISPLAY PWB BOTTOM VIEW 2 2 ...
Page 54: ...CD DK890N 6 39 MEMO ...
Page 82: ...CD DK890N 12 MEMO ...
Page 88: ...CD DK890N ...
