Pioneer CDJ-2000NXS Service Manual page 20

1
A [2-2] An LED does not light.
No. Cause Diagnostics Point
1 Defective LEDs LED in question
2 Defective drive Transistor in
circuit question
3 Defective PANEL PNLB Assy
CPU
B
[3] Operations (Keys/variable controls/JOG)
As operations of all keys, variable controls, and JOG dial can be checked in Service mode, it is recommended to check operations of
those controls in Service mode before proceeding to the subsequent checks. (For details, refer to 6. SERVICE MODE.)
[3-1] No key functions.
The PLAY, CUE, AUTO BEAT LOOP, BEAT SELECT, REV, LOOP IN, LOOP OUT, or RELOOP key does not function (direct input).
No. Cause Diagnostics Point
1 Defective SW PNLB Assy
2 Defective PANEL PNLB Assy
C
CPU
Other keys (except for the USB STOP key) do not function. (Because of A/D input, multiple SWs are connected to the same port on the PANEL CPU.
No. Cause Diagnostics Point
1 Defective SW PNLB Assy
2 Defective PANEL PNLB Assy
CPU
The USB STOP key does not function. (The signal from the USB STOP key is input to the MAIN CPU.)
D
No. Cause Diagnostics Point
1 Defective SW SDSW Assy,
MAIN Assy
2 Defective MAIN Assy
MAIN CPU
[3-2] Variable controls not controllable
Tempo slider not controllable
No. Cause Diagnostics Point
1 Defective SLDB Assy,
Tempo slider PNLB Assy
E
2 Defective PANEL PNLB Assy
CPU
TOUCH/BRAKE and RELEASE/START not controllable
No. Cause Diagnostics Point
1 Defective VOL PNLB Assy
F
2 Defective PANEL PNLB Assy
CPU
20
1
2
Item to be Checked
Check that soldering at the LED in question
is properly made. If it is OK, check that the
forward voltage (2.2 - 2.7 V) is present at
both ends of the LED.
Check that the control signal for the LED in
question is output from the PANEL CPU (IC8003).
If the symptom persists after the above
corrections.
Item to be Checked
Check if there is loose connection on the
signal line from the PANEL CPU (IC8003)
up to the SW.
If the symptom persists after the above
corrections.
Item to be Checked
Check if there is loose connection on the
signal line from the PANEL CPU (IC8003)
up to the SW.
If the symptom persists after the above
corrections.
Item to be Checked
Check if there is loose connection on the
signal line from the MAIN CPU (IC10)
up to the SW.
If the symptom persists after the above
corrections.
Item to be Checked
Check the waveform of signals on the
signal line (ADCT, ADIN).
If the symptom persists after the above
corrections.
Item to be Checked
Check the connections of and waveforms
of signals on the signal lines (TCH/BRK)
and (RELS/ST).
If the symptom persists after the above
corrections.
CDJ-2000NXS
2
3
Corrective Action
Correct any defective soldering.
If the forward voltage is present, then the LED
itself is defective. Replace it.
If the LED does not light even if the control signal is
output properly, then the transistor is defective. Replace it.
Check the connection between the PANEL CPU
(IC8003) and the LED in question. If the connection
is OK, the port may be damaged. Replace it.
Corrective Action
If there is no loose connection and if the signal
does not become L when the SW is pressed,
that SW is 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
If other SWs connected to the same port on the
PANEL CPU (IC8003) function properly and if
connection is properly made, replace the SW.
Check the connection of the PANEL CPU
(IC8003). If the connection is OK, the port may
be damaged. Replace it.
Corrective Action
If there is no loose connection and if the signal
does not become L when the SW is pressed,
that SW is defective. Replace it.
The MAIN CPU (IC10) is defective.
Replace the MAIN Assy.
Corrective Action
If the voltage on the signal line (ADIN) fluctuates
within the range of 0–3.3 V, with 1.65 V at the
center, go to Step 2. If it does not, the Tempo
slider (VR8701) is 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
If the voltage on the signal line (TCH/BRK and
RELS/ST) fluctuates within the range of 0–3.3 V,
go to Step 3. If it does not, the TOUCH/BRAKE
(VR8001) and RELEASE/START (VR8002) are
loosely connected or defective. Connect them
properly or replace them.
Check the connection of the PANEL CPU
(IC8003). If the connection is OK, the port may
be damaged. Replace it.
3
4
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