17
DDJ-ERGO-V
5
6
7
8
5
6
7
8
A
B
C
D
E
F
6
Power failure (2)
Identification of
defective Assy
JACK Assy
HPJK Assy
HPLC Assy
Disconnect the cables from each Assy in
order to confirm which Assy’s power is
abnormal.
If the voltage returns to a normal level when the
cables from either the JACK Assy or HPJK Assy
are disconnected, the internal circuits of the
corresponding Assy may be defective. If the
voltage returns to a normal level when the cables
from the HPLC Assy are disconnected, either
the internal circuits of the HPLC Assy or the
circuit to which power is supplied from
V
+5_HP_OUT inside the IFP
W
Assy may be
defective.
4.1 O
V
ERALL
W
IRTI
N
G DIAGRAM
4.3 PO
W
ER BLOCK
DIAGRAM
7
Power failure (3)
Identification of
defective power
system
FAULT_DET
IFP
W
Assy
Deactivate the voltage monitoring circuit
then check the section with improper
voltage.
The voltage monitoring circuit can be deactivated by
removing R337 (0
Ω
) on the FAULT_DET.
See the notes in “5.3
V
OLTAGE MO
N
ITORI
N
G”
before proceeding to further diagnostics.
To identify the section with improper voltage, check
the voltage at each point on the IFP
W
Assy.
4.3 PO
W
ER BLOCK
DIAGRAM
5.3
V
OLTAGE
MO
N
ITORI
N
G
10.12
V
OLATGES
10.13
W
A
V
EFORMS
1256789a
cd
1238
[1-2] Failure in the microcomputer system
1
Power failure in
the MAI
N
UCOM
CDJ1 Assy
Check the power terminal of the
MAI
N
UCOM (IC1002).
Check the power and voltage are normal.
Check the power line and the parts, such as coils
(beads), resistors, and capacitors.
If no problem was found with the parts, power line,
and conduction between the power supply and
G
N
D, the MAI
N
UCOM (IC1002) may be defective.
10.12
V
OLATGES
2
2
MAI
N
UCOM
Reset circuit
error
CDJ1 Assy
Check the Reset terminal (pin 12) of the
MAI
N
UCOM (IC1002).
In normal operation the voltage of the Reset
terminal (Pin 17) is high.
If it is low, check if the voltage at
V
+3R3_UCOM is
2.7
V
or less.
Check the reset line, resistors, capacitors, and
the Reset IC (IC1001).
10.12
V
OLATGES
10.13
W
A
V
EFORMS
2
3
MAI
N
UCOM
X'tal error
CDJ1 Assy
Check the oscillation waveforms of the
X'tal (X1001).
In normalcy, oscillate it at 24 MHz. If the oscillation
waveforms are abnormal, check the resistor on the
oscillation-signal line, the capacitor, and X'tal
(X1001). If nothing is wrong with these parts, the
MAI
N
UCOM (IC1002) may be defective.
10.13
W
A
V
EFORMS
I
4
MAI
N
UCOM
startup error
CDJ1 Assy
After startup, check the lighting statuses of
the LEDs.
(For example, although some of the LEDs
light properly, the unit is not started up
properly.)
Refer to “6.6 ERRROR DISPLAY”.
If there is no corresponding error indication,
reload the program via USB.
(
8
.3 HO
W
TO FIRM
W
ARE UPDATE)
If the normal status is not recovered after all
above steps are performed, the MAI
N
UCOM
(IC1002) may be defective.
6.6 ERROR DISPLAY
8
.3 HO
W
TO
FIRM
W
ARE UPDATE
5
Power failure in
the USB
Controller
IFP
W
Assy
Check if a voltage error was detected.
Check the power terminal of the USB
Controller (IC102).
If the detected voltage error is confirmed, check
conduction between the power supply and G
N
D.
Check the power line and the parts, such as coils
(beads), resistors, and capacitors.
If no problem was found with the parts, power line,
and conduction between the power supply and G
N
D,
the USB Controller (IC102) may be defective.
5.3
V
OLTAGE
MO
N
ITORI
N
G
10.13
W
A
V
EFORMS
57
8
4
Power failure in
the MAI
N
UCOM
on the IFP
W
Assy
IFP
W
Assy
Set the PO
W
ER switch to O
N
.
If
V
+3R3_UCOM is abnormal
(2.7
V
or less)
Disconnect the FFC connected between the
IFP
W
Assy and CDJ 1 Assy. If the voltage of the
V
+3R3_UCOM returns to a normal level, the
regulator (IC304) or its peripheral circuits may
be defective.
4.3 PO
W
ER BLOCK
DIAGRAM
10.12
V
OLATGES
2
5
Power failure in
the MAI
N
UCOM
CDJ1 Assy
CDJ2 Assy
JOG1, JOG2 Assy
TCH1, TCH2 Assy
Set the PO
W
ER switch to O
N
.
If
V
+3R3_UCOM is abnormal
(2.7
V
or less)
Disconnect the cables from the JOG1, JOG2,
TCH1, and TCH2 Assys. If the voltage at
V
+3R3_UCOM returns to a normal level, the
internal circuits of the JOG1, JOG2, TCH1, or
TCH2 Assy may be defective. If the voltage does
not return to a normal level, the MAI
N
UCOM
(IC1002) or its peripheral circuits and the circuits
to which power is supplied from the
V
+3R3_UCOM may be defective.
4.3 PO
W
ER BLOCK
DIAGRAM
10.12
V
OLATGES
2
No.
Cause
Diagnostics Point
Item to be Checked
Corrective Action
Reference
No.
Cause
Diagnostics Point
Item to be Checked
Corrective Action
Reference
