PIONEER DJ AlphaTheta CDJ-3000 Service Manual page 18

1
[3-2] Full-color LED does not turn on
A
No. Cause Diagnostics Point
1 Defective soldering Each Assy
2 LED has defect Each Assy
3 PANEL CPU PNLB Assy
has defect
4 LED Driver IC PNLB Assy
has defect
B
[4] Operation
[4-1] The rotary encoder is not working
No. Cause Diagnostics Point
1 Rotary Encoder ENCB Assy
circuit have defect
2 Rotary Encoder ENCB Assy
has defect
C
3 PANEL CPU PNLB Assy
has defect
[4-2] The button is not working
No. Cause Diagnostics Point
1 Button has Each button
defect
D
2 SW POWER SW POWER SUPPLY
SUPPLY has
defect
3 Power supply MAIN Assy
circuit have
defect
4 Reset circuit PNLB Assy
have defect
5 CLK signal of PNLB Assy
PANEL CPU have
defect
E
6 Switch circuit Each Assy
have defect
7 Switch has defect Each Assy
8 PANEL CPU has PNLB Assy
defect
F
18
1
2
Item to be Confirmed
Confirm the soldering status of each LED.
And, confirm the peripheral circuit of IC7203
(RGB LED CONTROLLER).
Confirm that the forward voltage of the LED
is about 2 V to 3 V.
Confirm that the control signal (SDA, SCL) that
output from IC7202 (PANEL CPU) to IC7203
(RGB LED CONTROLLER) is normal.
Confirm that the control signal that output
from IC7203 (RGB LED CONTROLLER) to
each LED is normal.
Item to be Confirmed
Confirm the circuit of ENC0, ENC1 and KEY2. Repair the defective soldering and the defective
Operate S6405 (Rotary Encoder) and confirm
that the following changes occur.
1. Turning it reverses the polarity of ENC0 and
ENC1
2. Pushing it changes the signal level of KEY2
The problem has not improved until the above. If not confirmed, replace IC7202 (PANEL CPU).
Item to be Confirmed
Confirm that the appropriate button presses
the appropriate switch.
Confirm that pin 5 (ever power output) of
CN2 on SW POWER SUPPLY is 12 V while
the power cord is plugged in.
Confirm that the voltage of V+3R3E (PANEL
CPU Power) is normal while the power cord is
plugged in.
Confirm that pin 1 of IC7201 (Reset IC) on
PNLB Assy is H while the power cord is
plugged in.
Confirm that CLK signal of PANEL CPU is
normal.
(Pin 13 of IC8001 = 16 MHz)
Confirm the circuit from each switch to
IC7202 (PANEL CPU).
Confirm that the signal goes from H to L
when the switch is pressed.
The problem has not improved until the above. Replace IC7202 (PANEL CPU).
CDJ-3000
2
3
Corrective Action
Repair the defective soldering if found.
If not confirmed, replace LED.
If not confirmed, replace IC7202 (PANEL CPU).
If not confirmed, replace PNLB Assy.
Corrective Action
connection if found.
If not confirmed, replace S6405 (Rotary Encoder). 10.45 WAVEFORMS
Corrective Action
If the switch is not pressed, replace the button.
If not confirmed, replace SW POWER SUPPLY.
If not confirmed, confirm the peripheral circuit of
IC1003 (DC/DC CONVERTER) and repair the
defective soldering if found. If not confirmed,
replace MAIN Assy.
If not confirmed, confirm the peripheral circuit of
IC7201 and repair the defective soldering if found.
If not confirmed, replace IC7201.
If not confirmed, confirm X7200 or the associated
circuits and repair the defective soldering if found.
If not confirmed, replace X7200.
Repair defective solder, defective connections,
and the peeled patterns if found.
If not confirmed, replace each switch.
3
4
Reference
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10.45 WAVEFORMS
A
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Reference
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B
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Reference
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10.45 WAVEFORMS
C
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4