Pioneer DDJ-ERGO-V Service Manual page 17

5
No. Cause Diagnostics Point
4 Power failure in IFPW Assy
the MAIN UCOM
on the IFPW
Assy
5 Power failure in CDJ1 Assy
the MAIN UCOM CDJ2 Assy
JOG1, JOG2 Assy
TCH1, TCH2 Assy
6 Power failure (2) JACK Assy
Identification of HPJK Assy
defective Assy HPLC Assy
7 Power failure (3) FAULT_DET
Identification of IFPW Assy
defective power
system
[1-2] Failure in the microcomputer system
No. Cause Diagnostics Point
1 Power failure in CDJ1 Assy
the MAIN UCOM
2 MAIN UCOM CDJ1 Assy
Reset circuit
error
3 MAIN UCOM CDJ1 Assy
X'tal error
4 MAIN UCOM CDJ1 Assy
startup error
5 Power failure in IFPW Assy
the USB
Controller
5
6
Item to be Checked
Set the POWER switch to ON.
If V+3R3_UCOM is abnormal
(2.7 V or less)
Set the POWER switch to ON.
If V+3R3_UCOM is abnormal
(2.7 V or less)
Disconnect the cables from each Assy in
order to confirm which Assy's power is
abnormal.
Deactivate the voltage monitoring circuit
then check the section with improper
voltage.
Item to be Checked
Check the power terminal of the
MAIN UCOM (IC1002).
Check the Reset terminal (pin 12) of the
MAIN UCOM (IC1002).
Check the oscillation waveforms of the
X'tal (X1001).
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.)
Check if a voltage error was detected.
Check the power terminal of the USB
Controller (IC102).
DDJ-ERGO-V
6
7
Corrective Action
Disconnect the FFC connected between the
IFPW 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.
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 MAIN UCOM
(IC1002) or its peripheral circuits and the circuits
to which power is supplied from the
V+3R3_UCOM may be defective.
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 IFPW Assy may be
defective.
The voltage monitoring circuit can be deactivated by
removing R337 (0 Ω) on the FAULT_DET.
See the notes in "5.3 VOLTAGE MONITORING"
before proceeding to further diagnostics.
To identify the section with improper voltage, check
the voltage at each point on the IFPW Assy.
Corrective Action
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
GND, the MAIN UCOM (IC1002) may be defective.
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).
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
MAIN UCOM (IC1002) may be defective.
Refer to "6.6 ERRROR DISPLAY".
If there is no corresponding error indication,
reload the program via USB.
(8.3 HOW TO FIRMWARE UPDATE)
If the normal status is not recovered after all
above steps are performed, the MAIN UCOM
(IC1002) may be defective.
If the detected voltage error is confirmed, check
conduction between the power supply and GND.
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 GND,
the USB Controller (IC102) may be defective.
7
8
A
Reference
4.3 POWER BLOCK
DIAGRAM
10.12 VOLATGES
2
4.3 POWER BLOCK
DIAGRAM
10.12 VOLATGES
2
B
4.1 OVERALL
WIRTING DIAGRAM
4.3 POWER BLOCK
DIAGRAM
4.3 POWER BLOCK
DIAGRAM
5.3 VOLTAGE
C
MONITORING
10.12 VOLATGES
10.13 WAVEFORMS
1256789a
cd1238
Reference
10.12 VOLATGES
2
D
10.12 VOLATGES
10.13 WAVEFORMS
2
10.13 WAVEFORMS
I
E
6.6 ERROR DISPLAY
8.3 HOW TO
FIRMWARE UPDATE
5.3 VOLTAGE
MONITORING
10.13 WAVEFORMS
578
F
17
8