27
DDJ-RZX
5
6
7
8
5
6
7
8
A
B
C
D
E
F
No
Yes
Touch panel Module : DSX1128
LCDM Assy : DWX3828
LCDP Assy : DWX3791
As the IC1381 and IC1881 are supposed to be
defective, replace the LCDM Assy and
LCDP Assy.
Make a confirmation of the touch panel in
“6. SERVICE MODE” .
Confirm as following when it is unable to
implement normaly or confirming is NG in the
test mode.
Confirm if the waveform of pin1 to pin4 of
CN1381 and CN881 changes when operating
the touch panel.
Refer to “
Touch Panel
” as to waveforms.
Yes
As the touch panel module is supposed to be
defective, replace it.
No
Is the waveform changed?
Is the waveform output when checking?
Confirm the communication path of
TPNL_XINT/TPNL_SCL/SDA
(IC1381 and IC1831 to IC1501).
Touch panel does not work.
The position of the touch panel is shifted.
Confirmation the touch panel
Display-Related Problems
No
Yes
No
The LEDs do not light.
Replacement of the LED of failure points
Replacement of V+5LED High Side SW (IC1154).
Is there any LED that is lit?
Are indications of multiple
LEDs abnormal?
Yes
Identify a failure location, referring to
“6.1 SERVICE MODE” .
3-11
3-12
3-13
3-14
Ch 1
Ch 2
Ch 3
Ch 4
Ch 1: TP1881 (CN1881_pin 1) (YT)
Ch 2: TP1882 (CN1881_pin 2) (XR)
Ch 3: TP1881 (CN1881_pin 3) (YB)
Ch 4: TP1881 (CN1881_pin 4) (XL)
V: 2 V/div. H: 40 us/div.
Touch Panel
*: During the panel near the center touch
