Pioneer CDJ-2000, Service Manual

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31
CDJ-2000
5 6 7 8
5 6 7 8
A
B
C
D
E
F
[3-3] The N EEDLE SEARCH does not work.
[3-4] The rotary encoder does not work.
[3-5] Abnormalities regarding the JOG dial
10.13 CDCB and
SDSW ASSYS
10.11
P
N LB ASSY
N o response when the N EEDLE SEARCH is touched
No. Cause Diagnostics Point Item to be Checked Corrective Action Reference
1
Loose connections
in the communica-
tion line
CDCB Assy
Check the connections of the peripheral
circuits of the CDC (IC5001). The communication line may be loosely connected.
Correct it if it is.
2 Defective CDC Related point
Check that the signal from Pin 5 of C N 8003
changes when the N EEDLE SEARCH pad
is touched. (When the pad detects touching
by a finger, this signal is first output from
CDC to the PA
N EL CPU.)
The CDC (IC5001) may be defective. Replace it.
3
Defective PA N EL
CPU
Related point
If the symptom persists after the above
corrections,
Check the connection of the PA N EL CPU (IC8003).
If the connection is OK, the port may be damaged.
Replace it.
N o response when the rotary encoder is operated
No. Cause Diagnostics Point Item to be Checked Corrective Action Reference
1
Loose connections
in the signal line
or defective SW
TFTB Assy,
P
N LB Assy
Check the connections of the signal lines
for E
N C_SW, E N C1, and E N C2.
When the SW is pressed, the E N C_SW
signal must become L, and when it is
turned, the waveforms of the signal lines for
E
N C1 and E N C2 must change.
The PA N EL CPU(IC8003) and SW may be loosely
connected or they may be defective.
Reconnect them securely.
If the symptom persists, replace them.
2
Defective PA N EL
CPU
Related point
If the symptom persists after the above
corrections,
Check the connection of the PA N EL CPU (IC8003).
If the connection is OK, the port may be damaged.
Replace it.
Turning of the JOG dial is not detected
No. Cause Diagnostics Point Item to be Checked Corrective Action Reference
1
Defective photo
interrupter or
PA
N EL CPU
JOGB Assy,
JFLB Assy,
C N CT Assy,
P N LB Assy
Check the waveforms of the signal lines
(JOG1/JOG2).
If no waveform can be confirmed, the photo interrupter
(PC9301) may be defective. Replace it.
If a waveform can be confirmed, the signal line may be
loosely connected or the PA
N EL CPU (IC8003) may be
defective. Reconnect the signal line.
If the symptom persists, replace it.
10.18
WA
V EFORMS
N o. 38, 39
2
Defective
encoder plate
JOG Assy
Check if the encoder plate has come off
GEAR A or is dirty. If it has come off, adhere it at its original position.
If it is dirty, replace it with a new one.
Pressing on the JOG dial cannot be detected.
No. Cause Diagnostics Point Item to be Checked Corrective Action Reference
1
Defective photo
interrupter or
PA
N EL CPU
JOGB Assy,
JFLB Assy,
C N CT Assy,
P N LB Assy
Check the waveform of the signal on the
signal line (JOG_SW) when the JOG dial
is pressed.
If the signal on the signal line (JOG_SW) is not set to
L when the JOG dial is pressed, the SHEET SW
(DSX1078-A) may be defective. Replace it.
If the signal line is set to L, the signal line may be
loosely connected or the PA
N EL CPU (IC8003) may
be defective. Reconnect the signal line.
If the symptom persists, replace it.
2
Defective SW
RI
N G and
JOG HOLDER
JOG Assy
Check if there is any foreign object
between the SW RI
N G and JOG HOLDER.
Remove any foreign object, if present.
Check if the cushions that are adhered to the
JOG HOLDER and SW RI
N G have worn out.
Replace the SW cushion (DEC2538-A) with a
new one.
N oise is heard when the JOG dial is turned.
No. Cause Diagnostics Point Item to be Checked Corrective Action Reference
1
Defective JFLB
Assy or gears
JOG Assy
Check if the JOG FL of the JFLB has
been shifted upward from the holder.
The JOG FL may interfere with JOG A.
Replace the JFLB Assy.
There may be any scratches on the 3
gears or some foreign object between
the gears.
If there are any scratches, replace the scratched gear
with a new one. If there is any foreign object, remove
it then replace the gears with new ones. After that,
check that the JOG adjustment value is within the
reference range, referring to “8.1 JOG Dial Rotation
Load Adjustment.”