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3
8
DJM-900NXS
1
2
3
4
A
B
C
D
E
F
1
2
3
4
[5] Indicator (FL/LED) not lit
[5-1] The FL does not light.
SUB UCOM (IC6601) controls the FL/LED.
MAI
N
_CPU controls only LFO FORM (WAKE UP) button LED and EFFECT O
N
/OFF button LED.
Driver power to the FL is supplied within the MAI
N
Assy.
1
Power failure
P
N
LA Assy
V
6601
24 pin
1 pin
25 pin
MAI
N
Assy
IC1407
V
+3R3D
Block
IC1405
V
+5D
Block
IC1401
V
+34D
Block
Check for the voltage of the FL (
V
+3R3D_
PA/
V
+5D_LED_PA/
V
+34D_PA).
If no loose connection is detected with the FL of
the P
N
LA Assy but power voltage is not detected,
check the mounting status of the DC-DC converter
IC and peripheral parts for each voltage point of
the MAI
N
Assy.
If an error is detected, repair the defective parts.
4.3 POWER
BLOCK DIAGRAM
5.3 I
N
FORMATIO
N
O
N
POWER
DIAG
N
OSTICS
2
Filament
voltage error
of the FL
P
N
LA Assy
V
oltage between pins
1 to 32 of
V
6601
Check that the FL filament voltage is
2.3
V
± 20%.
If the voltage is outside the normal range, a bias
circuit error of the FL may be suspected.
Check the mounting status of Q6601, Q6602, and
peripheral parts. If there is no problem, Q6601 or
Q6602 may be defective. Replace them.
—
3
Signal errors
P
N
LA Assy
V
6601
22 pin
21 pin
23 pin
24 pin
Check for the output signal of the FL communication
line and the cable connection status in the P
N
LA Assy.
• FL_SCK
• FL_TXD
• FL_LAT
• FL_BK
If no signal is output, check for the mounting
status of SUB UCOM (IC6601).
If there is no problem, the port may be defective.
Replace it.
If soldering is improper, resolder it.
4
Defective FL
P
N
LA Assy
If the symptom persists after the above
corrections.
FL may be defective.
Replace it.
—
[6] X-PAD
SUB UCOM (IC6601) controls the X-PAD.
[6-1] Pressing on the JOG dial not be detected
1
Loose
connection
P
N
LA Assy
CDCB Assy
Check for loose connection on the signal
line from the power source and SUB UCOM
(IC6601) to the touch sensor IC (IC3601).
If any connection on the power or signal line is
improper, correct it.
2
Signal errors
Loose
connection
Signal errors
P
N
LA Assy
C
N
6601
10 pin
5 pin
8 pin
7 pin
3 pin
2 pin
Check for input and output signals of the communi-
cation line of the touch sensor IC in the P
N
LA Assy
when power is supplied and the unit is turned on.
•
V
+3R3 (power)
• RBC_SCK
• RBC_SI
• RBC_SO
• RBC_CS
• RBC_I
N
T
If there is no signal when the unit is turned on,
check the mounting status of SUB UCOM
(IC6601).
If there is no problem, the port may be defective.
Replace it.
4.3 POWER
BLOCK DIAGRAM
5.3 I
N
FORMATIO
N
O
N
POWER
DIAG
N
OSTICS
10.41 WA
V
EFORMS
P
N
LA ASSY
3
Touch sensor IC
defective
P
N
LA Assy
(the same points
checked in
N
o.2)
Check that the input and output signals of the
touch sensor IC communication line in the P
N
LA
Assy with the X-PAD touched in normal operation.
(the same points checked in
N
o.2)
If there are no input or output signals, the touch
sensor IC (IC3601) may be defective. As this
part cannot be replaced, replace the Assy.
—
[6-2] The X-PAD LEDs not light
1
P
N
LA Assy
C
N
6602
27 pin
/MAI
N
Assy
Check for drive voltage of
V
+12_STB of the
LED.
If any connection on the power line is improper,
correct it.
4.3 POWER
BLOCK DIAGRAM
5.3 I
N
FORMATIO
N
O
N
POWER
DIAG
N
OSTICS
2
P
N
LA Assy
IC6601
79 pin
80 pin
Check if the LED drive signal is output from
SUB uCOM (IC6601 Pins 79 and 80).
If the touch sensor functions normally but no
signal is output, check the mounting status of
the periphery of Q6651 to Q6654. If there is no
problem, SUB UCOM (IC6601) port may be
defective. Replace it.
3
Defective LED
P
N
LA Assy
C
N
6601
11
⇔
12 pin
Check for the voltage (2.7–4.2
V
) at both
electrodes of the LED.
If no voltage is detected, the LED may be
defective. Replace it.
No.
Cause
Diagnostics Point
Item to be Checked
Corrective Action
Reference
No.
Cause
Diagnostics Point
Item to be Checked
Corrective Action
Reference
No.
Cause
Diagnostics Point
Item to be Checked
Corrective Action
Reference
10.41 WA
V
EFORMS
P
N
LA ASSY
10.41 WA
V
EFORMS
P
N
LA ASSY
4-12
4-10
4-9
4-11
4-14
4-2
4-5
4-3
4-4
4-6
4-7
4-5
4-3
4-4
4-6
4-7
4-8
4-21
4-20
4-21
4-20
4-1
4-13
4-15
4-16
4-14 4-13
4-15 4-16
1-2
1-5
1-4
Содержание DJM-900NXS
Страница 10: ...10 DJM 900NXS 1 2 3 4 A B C D E F 1 2 3 4 2 2 PANEL FACILITIES ...
Страница 11: ...11 DJM 900NXS 5 6 7 8 5 6 7 8 A B C D E F ...
Страница 12: ...12 DJM 900NXS 1 2 3 4 A B C D E F 1 2 3 4 ...
Страница 15: ...15 DJM 900NXS 5 6 7 8 5 6 7 8 A B C D E F ...
Страница 20: ...20 DJM 900NXS 1 2 3 4 A B C D E F 1 2 3 4 4 3 DSP BLOCK DIAGRAM ...
Страница 21: ...21 DJM 900NXS 5 6 7 8 5 6 7 8 A B C D E F ...
Страница 87: ...87 DJM 900NXS 5 6 7 8 5 6 7 8 A B C D E F ...
Страница 189: ...189 DJM 900NXS 5 6 7 8 5 6 7 8 A B C D E F ...
Страница 192: ...192 DJM 900NXS 1 2 3 4 A B C D E F 1 2 3 4 A SIDE B A INPUT ASSY CN4003 CN4002 CN5001 CN5401 ...
Страница 193: ...193 DJM 900NXS 5 6 7 8 5 6 7 8 A B C D E F A SIDE B LF DWX3193 INPUT DWX DNP2625 B CN6201 CN4201 CN4601 1 ...