Pioneer DDJ-SR Service Manual page 13

5
Pad does not work.
Confirm whether each cables is
connected properly.
When you pressed Pad,
does the voltage change
with CN500 pins 2 - 9?
Yes
When you pressed Pad,
does the voltage change
by the output of IC502?
Yes
LED does not lit.
The LED lits by matrix drive.
No
Does not all LED lit?
Yes
Is the signal of "DATA1 - 8"
of the LED control signal "L"?
Yes
Does not only
one LED lit?
Yes
[3] Troubles of settings
Cannot store user settings.
The setting information is saved
in IC19.
Are SCL and the SDA
signals "H" or "L"?
Yes
5
6
No FSR PCB is defective.
Replace the FSR Plate Assy L, R.
No IC502 is defective. Replace the
PANEL L or R PCB Assy.
UCOM (IC20) is defective.
Replace the I/O PCB Assy.
No LED DRIVER (IC21) is defective.
Replace the I/O PCB Assy.
UCOM (IC20) is defective.
Replace the I/O PCB Assy.
The abnormality of the IC which
LED is connected to if you confirm
No
that all keys work normally and do
not have any problem.
Replace the I/O PCB Assy.
Damage of the LED.
Replace the LED.
No E2ROM (IC19) is defective.
Replace the I/O PCB Assy.
UCOM (IC20) is defective.
Replace the I/O PCB Assy.
6
7
[4] Troubles of Jog touch and Jog rotation
Jog touch and Jog rotation does
not work.
Confirm whether each cables is
connected properly.
When you touched Jog,
does the voltage change
with IC501 pin 5?
Yes
When you turned Jog,
does the voltage change
with IC20?
[5] Troubles of sound input and output
Sound does not output.
Confirm if the USB cable is
connected properly.
Yes
Does USB input signal
output it from pins 2
and 3 of JK1?
Yes
Are the data control signals
in pins 34, 35 and 44
of IC16?
Yes
Sound signal does not have
abnormality, or confirm the
following part.
IC23 to 26 (A/D and D/A IC)
Yes
Is the abnormality in
the parts mentioned above?
DDJ-SR
7
8
No IC501 is defective. Replace the
PANEL-L or R PCB Assy.
No UCOM (IC20) is defective.
Replace the I/O PCB Assy.
UCOM (IC20) is defective.
Replace the I/O PCB Assy.
No USB cable is defective.
Replace the USB cable.
No IC16 is defective.
Replace the I/O PCB Assy.
No A/D and D/A IC are defective.
Replace the I/O PCB Assy.
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A
B
C
D
E
F