Pioneer CDJ-2000NXS Service Manual page 21

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[3-3] The NEEDLE SEARCH does not work.
No response when the NEEDLE SEARCH is touched
No. Cause Diagnostics Point
1 Loose connections CDCB Assy
in the communication
line
2 Defective CDC PNLB Assy
3 Defective PANEL PNLB Assy
CPU
[3-4] The rotary encoder does not work.
No response when the rotary encoder is operated
No. Cause Diagnostics Point
1 Loose connections TFTB Assy,
in the signal line PNLB Assy
or defective SW
2 Defective PANEL PNLB Assy
CPU
[3-5] Abnormalities regarding the JOG dial
Turning of the JOG dial is not detected
No. Cause Diagnostics Point
1 Defective photo JOGB Assy,
interrupter or JFLB Assy,
PANEL CPU CNCT Assy,
PNLB Assy
2 Defective JOG Assy
encoder plate
Pressing on the JOG dial cannot be detected.
No. Cause Diagnostics Point
1 Defective photo JOGB Assy,
interrupter or JFLB Assy,
PANEL CPU CNCT Assy,
PNLB Assy
2 Defective JOG Assy
SW ring
and
JOG holder
Noise is heard when the JOG dial is turned.
No. Cause Diagnostics Point
1 Defective JOG Assy
JFLB Assy
or
gears
5
6
Item to be Checked
Check the connections of the peripheral
circuits of the CDC (IC5001).
Check that the signal from Pin 5 of CN8003
changes when the NEEDLE SEARCH pad
is touched. (When the pad detects touching
by a finger, this signal is first output from
CDC to the PANEL CPU.)
If the symptom persists after the above
corrections.
Item to be Checked
Check the connections of the signal lines for
ENC_SW, ENC1, and ENC2. When the SW is
pressed, the ENC_SW signal must become L,
and when it is turned, the waveforms of the
signal lines for ENC1 and ENC2 must change.
If the symptom persists after the above
corrections.
Item to be Checked
Check the waveforms of the signal lines
(JOG1/JOG2).
Check if the encoder plate has come off
Gear A or is dirty.
Item to be Checked
Check the waveform of the signal on the
signal line (JOG_SW) when the JOG dial
is pressed.
Check if there is any foreign object
between the SW ring and JOG holder.
Check if the cushions that are adhered to
the JOG holder and SW ring have worn
out.
Item to be Checked
Check if the JOG FL of the JFLB has
been shifted upward from the holder.
There may be any scratches on the 3
gears or some foreign object between
the gears.
CDJ-2000NXS
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7
Corrective Action
The communication line may be loosely
connected. Correct it if it is.
The CDC (IC5001) may be defective.
Replace it.
Check the connection of the PANEL CPU
(IC8003). If the connection is OK, the port may
be damaged. Replace it.
Corrective Action
The PANEL CPU (IC8003) and SW may be
loosely connected or they may be defective.
Reconnect them securely.
If the symptom persists, replace them.
Check the connection of the PANEL CPU
(IC8003). If the connection is OK, the port may
be damaged. Replace it.
Corrective Action
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 PANEL CPU (IC8003) may
be defective. Reconnect the signal line.
If the symptom persists, replace it.
If it has come off, adhere it at its original position.
If it is dirty, replace it with a new one.
Corrective Action
If the signal on the signal line (JOG_SW) is not set to
L when the JOG dial is pressed, the Sheet SW
may be defective. Replace it.
If the signal line is set to L, the signal line may be
loosely connected or the PANEL CPU (IC8003) may
be defective. Reconnect the signal line.
If the symptom persists, replace it.
Remove any foreign object, if present.
Replace the SW cushion with a new one.
Corrective Action
The JOG FL may interfere with JOG A.
Replace the JFLB Assy.
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 "8.3 JOG
DIAL ROTATION LOAD ADJUSTMENT."
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8
A
Reference
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B
Reference
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C
Reference
10.20 WAVEFORMS
a b
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D
Reference
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E
—————
Reference
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F
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