Pioneer CDJ-2000NXS2 Service Manual page 18

1
[2] Display (Jog FL/LED)
A
The Jog FL and the LEDs are controlled by the PANEL CPU (IC8001).
[2-1] The Jog FL does not light.
No. Cause Diagnostics Point
1 Power is not JFLB Assy
supplied properly.
2 Defective JFLB Assy
control signal
B
3 Defective Jog FL —————
[2-2] An LED does not light.
No. Cause Diagnostics Point
1 Defective LEDs PNLB Assy
2 Defective drive PNLB Assy
circuit
3 Defective PANEL PNLB Assy
C
CPU
[3] Operations (Button / Volume / Rotary encoder / Jog dial / Touch panel)
As operations of all buttons, variable volumes, rotary encoder , Jog dial and Touch panel 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 "6.1 SERVICE MODE.")
[3-1] No key functions.
No key functions. (except USB STOP button)
No. Cause Diagnostics Point
1 Defective PNLB Assy
D
Power SW
2 Defective PNLB Assy
RST signal of
PANEL CPU
3 Defective PNLB Assy
CLK signal of
PANEL CPU
4 Defective PANEL PNLB Assy
CPU
E
The USB STOP button does not function. (The signal from the USB STOP button is input to the MAIN CPU.)
No. Cause Diagnostics Point
1 Defective SW HLED Assy,
MAIN Assy
2 Defective MAIN Assy
MAIN CPU
F
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1
2
Item to be Checked
Check the power-supply voltages
(VDD (= 3.3 V), F+ (= 4.86 V), F- (= 2.17V) ,
VH (= 26 V)) of the FL (V9201).
Check that the FL (V9201) control line is
properly connected in the JFLB Assy.
• J_SCLK
• J_BK
• J_LAT
• J_DSO
If the symptom persists after the above
corrections,
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 (IC8001).
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 (IC8001)
up to the SW.
Check the RST signal of the PANEL CPU
(IC8001 pin 12).
Check the CLK signal of the PANEL CPU
(IC8001 pin 13 = 4 MHz).
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.
CDJ-2000NXS2
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3
Corrective Action
Each power-supply may be loosely connected or
may be defective. Correct loose connection. If the
symptom persists, replace the defective part.
Check the connection and correct loose
connection.
As the Jog FL is controlled by the PANEL CPU
(IC8001), if no signal is output, check the
PANEL CPU (IC8001).
Replace the Jog FL.
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
(IC8001) 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 Power SW is
pressed, that SW is defective. Replace it.
If Pin 12 of IC8001 is "L" although the V+3R3E is
normal, the RESET IC (IC8002) or Q8015 is
defective or the relevant connection is poor.
Correct connection or replace the defective part
with a new one.
The X8001 may be loosely connected with its
peripheral devices or a part may be defective.
Correct loose connection. If the symptom persists,
replace the defective part.
Check the connection of the PANEL CPU
(IC8001). 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 CPU (IC10).
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Reference
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10.27 WAVEFORMS
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Reference
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Reference
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10.27 WAVEFORMS
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Reference
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