Pioneer DDJ-T1, Руководство по обслуживанию

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23
DDJ-T1
5 6 7 8
5 6 7 8
A
B
C
D
E
F
5.2 TROUBLESHOOTING
[0] Prior Confirmation
[0-1] Checking in Service Mode
[0-2] Checking Internal Cables
[1] Failure in Startup (Failure in power-on, all LEDs unlit)
[1-1] Failure in the power system
In this section, causes of failure, diagnostics points, and corrective measures can be searched for according to symptoms.
Before disassembling this unit, it is recommended to infer a failure point by referring to the error code.
For the relationship of each power-supply system, see “4.3 POWER SUPPLY BLOCK DIAGRAM.”
If software of the product is updated before performing diagnostics, check that software updating has been performed
properly before proceeding to diagnostics.
If software updating has not been performed properly, update the software, following the instructions in
“8.3 UPDATI
N G OF THE FIRMWARE.”
Contents
[0] Prior Confirmation
[1] Failure in Startup (Failure in power-on, all LEDs unlit)
[2] Display (LED indicators)
[3] Operations (Buttons/ V Rs/Sliders/ N eedleSearch/JOG)
[4] USB connection
[5] AUDIO OUT
[6] AUDIO I N
[7] Basic Operation Check of the MAI N _UCOM
The waveform numbers and voltage confirmation-point numbers described in this section correspond to the numbers on the
schematic diagrams and PCBs.
Be sure to check the failure points, as well as checking for failure in their peripheral circuits.
In a case where the unit does not start up, even after it is turned O N , when it is powered via the AC adapter or USB-bus power connection.
No. Cause/Symptom Point to be checked Item to be checked How to distinguish a defective point and/or corrective action Reference
1 – Service Mode Identify a failure point.
After a failure point is identified, see the section
referenced in this manual.
6. SERVICE
MODE
No.
No.
Cause/Symptom Point to be checked Item to be checked How to distinguish a defective point and/or corrective action Reference
1
Disconnection,
breakage, or
loose connection
of internal cables
Cables
Check that all the cables are securely
connected. Check that there is no breakage
in the cables.
Securely connect a cable if it is not connected.
If a cable is broken, replace it.
N ote: If an FFC cable is disconnected, be careful of
the orientation of the contacts when reconnecting it,
referring to the printed guide on the board.
4.1 OVERALL
CONNECTION
DIAGRAM
Cause/Symptom Point to be checked Item to be checked How to distinguish a defective point and/or corrective action Reference
1
Failure in the
AC adapter USBB Assy
V +ADP5
Set the POWER switch to OFF.
Check that the voltage of the
V +ADP5
power line is in the range of 4.75–5.25 V .
If the voltage is outside the range of 4.75–5.25 V ,
failure in the AC adapter and its periphery may be
suspected. AC adapter (DWR1491), DC jack
(JA2501), FETs (Q2523, Q2525), Tra ( )
4.3 POWER
SUPPLY BLOCK
DIAGRAM
4.3 POWER
SUPPLY BLOCK
DIAGRAM
4.3 POWER
SUPPLY BLOCK
DIAGRAM
4.3 POWER
SUPPLY BLOCK
DIAGRAM
2
Failure in USB-
bus power USBB Assy
V +USB5
Set the POWER switch to OFF.
Check that the voltage of the
V +ADP5
power line is in the range of 4.75–5.25 V .
If the voltage is outside the range of 4.75–5.25 V ,
failure in the USB-bus power and its periphery may
be suspected. Check the USB cable and USB
connector.
3-1
Power failure in the
MAI
N _UCOM on
the UCOM Assy
UCOM Assy
MAI N _UCOM
Set the POWER switch to O N .
If V +3R3_UCOM is abnormal (2.7 V or less)
and V +4R7_STB is normal (4.2–5.0 V )
The regulator (IC105), the MAI N _UCOM (IC701),
or their peripheral circuits may be defective.
3-2
Power failure in the
USB_UCOM on
the UCOM Assy
UCOM Assy
USB_UCOM
Set the POWER switch to O N .
If V +3R3_USB is abnormal (2.7 V or less)
and the V +5_USB is normal (4.5 V –5.25 V )
The regulator (IC102), the USB_UCOM (IC202),
or their peripheral circuits may be defective.
10.17 WAVEFORMS
AC adapter
4
10.17 WAVEFORMS
Power bus power
1