25
DDJ-RZX
5
6
7
8
5
6
7
8
A
B
C
D
E
F
No
USB communication failure with IC1701
in the MAIN Assy
Confirm the path from USB HUB
(IC4902 and IC4952) to IC1701 in the
MAIN Assy.
If there is no defect, replace the MAIN Assy.
No
Confirm the peripheral circuits of IC1301 and
IC1801 in LCDM Assy and LCDP Assy.
Confirm also the state removing the LCD module.
When the voltage is normal by removing the
LCD module, replace it.
When there is no trouble, IC1301 and IC1801
are supposed to be defective, and replace the
LCDM Assy and LCDP Assy.
Yes
Yes
Is the unit recognized as the controller /
sound of sound, video and games?
Refer to “Confirmation of the backlight” .
Confirm the power line of the LCD module.
Refer to also “10.61 WAVEFORMS” ,
and confirm the voltage of pin3, 4, 5, 21, 25, 58
and 59 of CN1401 and CN1901 in LCDM and
LCDP Assy.
Confirm the RGB signal input to the LCD module.
Refer to “
LCD RGB Operation
” ,
and confirm if each signal is input normally.
Ch 1: TP1420 (DCLK)
Ch 2: CN1401_ pin 32 (DE)
Ch 3:
Ch 4: CN1401_ pin 34 (DATA (B7))
V: 2 V/div. H: 10us/div. V: 2 V/div. H: 40 ns/div.
2-1
2-2
2-3
Ch 1
Ch 2
Ch 4
Ch 1
Ch 2
Ch 4
LCD RGB Operation
LCDM Assy
LCDP Assy
3-1
3-2
3-3
3-4
Ch 1: TP1920 (CN1901_pin 33) (DCLK)
Ch 2: TP1918 (CN1901_pin 30) (VSD)
Ch 3: TP1919 (CN1901_pin 31) (HSD)
Ch 4: CN1901_pin 34 (DATA (B7))
V: 2 V/div. H: 200 us/div. V: 2 V/div. H: 40 ns/div.
Ch 1
Ch 2
Ch 3
Ch 4
Ch 1
Ch 2
Ch 3
Ch 4
LCD RGB Operation
Review the application setting used in PC/MAC.
(This unit operates normally.)
No
When the device except the LCD do not
operate normally, refer to the item
“It is unable to boot up”
Yes
Confirm the power lines. Refer to the items
“Confirmation of the power lines” .
If there is no defect, replace the LCDM Assy.
Yes
Do the device except the LCD
operate normally?
No
Do all three LCD modules display
no screen?
Yes
Are each power supply voltages normal?
LCD is not displayed.
LCD display is not normal.
Confirmation of the LCD
