Pioneer DDJ-SX2 Service Manual page 13

5
The rotary VRs or slide VRs do not
function.
The rotary selectors do not
function.
There is no response to turning of
the jog dial.
5
6
Check that the corresponding wires are properly
connected.
If the defective VR is operated, does the
corresponding voltage of signal change?
Yes
No
Is the defective VR a CH fader
or crossfader?
Yes
Check the analog SW IC to which the corresponding
signal is connected.
Check whether input signal A, B,
or C is fixed at "H" or "L".
Yes
Check that the corresponding wires are properly
connected.
Which operations do not function,
pushing or turning?
Turning
Check whether the signals from Pins 1 and 3
of the corresponding rotary selector are
fixed at "H" when it is turned.
Yes
Check that the corresponding wires are properly
connected.
Check whether the signals from Pins 2
and 4 of CN501 are fixed at "H" when
the jog dial is turned.
Yes
6
7
No
The VR is defective.
Replace the defective part.
The UCOM (IC25) is in failure.
Replace the DSP PCB Assy.
No The analog SW IC is defective.
Replace the defective part.
The UCOM (IC25) is in failure.
Replace the DSP PCB Assy.
Pushing
See "The keys or slide switches do not function."
With BROWSE: The UCOM (IC25) is defective.
No
With BEATS: The UCOM (IC24) is defective.
Replace the DSP PCB Assy.
The rotary selector is in failure.
Replace the defective part.
No
The UCOM (IC24) is in failure.
Replace the DSP PCB Assy.
The photo interrupter is defective.
Replace the SENSOR PCB Assy.
DDJ-SX2
7
8
A
B
C
D
E
F
13
8