PIONEER DJ XDJ-XZ Service Manual page 26

1
Trouble with the operating elements or LEDs
A
[Confirmation work in advance]
Confirm whether LED / operation is OK.
Please refer to "6.1 TEST MODE" and confirm whether there are problems with LEDs/elements.
If there is a problem, please repair the defective part. (See "Display trouble", "Operation trouble".)
When making a diagnosis, refer also to "4.5 MATRIX INFORMATION" for diagnosis.
Some of the matrix keys (SW) do not function,
and some of the LEDs cannot light on.
B
C
No operation with keys (switches), No
operation with slide switches.
D
E
F
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1
2
Make sure that keys and LEDs that do not
work are using the same GRID in the
schematic diagram.
Is the same grid used?
No
Which key is not working Which key is not working
either direct key or matrix key? either direct key or matrix key?
Matrix key
XDJ-XZ
2
3
Check the corresponding grid, referring to
"4.5 MATRIX INFORMATION".
If no grid
waveform signal is output from the shift register
IC, check the communication line with the
microcomputer first, then check if the grid line is
short-circuited with GND, caused by a failure in
Yes
a key, LED, or the transistor for the drive.
Also check the connection of the grid line. If no
problem, replace the shift register IC:
! MIXER block is in failure
MIXER Assy: Replace IC7004
! CDJ block is in failure
DCK1 Assy: Replace IC8102
DCK2 Assy: Replace IC9003
! If Master level indicator LEDs do not light on
DCK2 Assy: Replace IC9003 and IC9004
! If CH level indicator LEDs do nor light on
MIXER Assy: Replace IC7004, IC7005 and IC7006
See "No operation with keys (switches), No
operation with slide switches" or "The LEDs
do not light."
Check that current is conducted between the
terminals of the switch when it is pressed. If current
is not conducted, replace the switch. Check the line
between the switch and the microcomputer. If the
line is OK, replace the microcomputer to which the
switch is connected, as follows:
Direct key
! ERP UCOM
UCOM Assy: Replace IC4502
! PANELM UCOM
UCOM Assy: Replace IC4505
! MAIN UCOM
Replace MAIN Assy
! JLCD1/JLCD2 Assy
Replace IC3002/IC3202
Check the transistors on the line that is
connected to the microcomputer port and
waveforms and connections of the line. If no
problem, replace the microcomputer, as follows:
! ERP UCOM
UCOM Assy: Replace IC4502
! PANELM UCOM
UCOM Assy: Replace IC4505
! MIXER UCOM
MAIN Assy: Replace IC2302
3
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