Troubleshooting - Pioneer CDJ-350 Service Manual

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5.2 TROUBLESHOOTING

A
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 and signal 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 "8.4 UPDATING OF
THE FIRMWARE."
Contents
[0] Prior Confirmation
[1] Failure in Startup
B
[2] Display (DATA FL/LED)
[3] Operations (SW/Volume/JOG)
[4] USB (Type A/Type B)
[5] AUDIO OUT
[6] DRIVE Assy
[7] SERVICE MODE
[8] Error Codes
[9] Basic Operation Check of CPU/DSP
The waveform numbers described in this section correspond to the "10.11 WAVEFORMS."
C
[0] Prior Confirmation
[0-1] Checking in Service Mode
No. Cause Diagnostics Point
1 — Service mode
[0-2] Checking Cables
No. Cause Diagnostics Point
Disconnection,
breakage, or
1 Cables
loose connection
D
of cables
[1] Failure in Startup
[1-1] No power
Even after the unit is turned on, a STANDBY/ON button is not lit with red.
No. Cause Diagnostics Point
SMPS Assy
1 Power failure
PNLB Assy
E
[1-2] Mode shift error in Standby mode
STANDBY mode cannot be entered.
No. Cause Diagnostics Point
Poor connection
1 PNLB Assy
/Defective SW
2 Signal errors PNLB Assy
Defective signals
3 PNLB Assy
/SMPS Assy
F
20
1
2
Item to be Checked
Check the failure points.
Item to be Checked
Check that all the cables are securely
connected.
Check that there is no breakage in the
cables.
Item to be Checked
Check V+5EV.
Item to be Checked
Check if there is loose connection on the
signal line from the PANEL CPU (IC501)
to the SW(S525).
Check the TSCS, TSCK, and TSI waveforms.
Check the level of POWER_ON signal
(IC501-4 pin).
CDJ-350
2
3
Corrective Action
See the section describing locations of defects in
this manual.
Corrective Action
Securely connect the cables. If a cable is broken,
replace it.
Corrective Action
If the V+5EV voltage is not output, the SMPS Assy
may be defective.
If the V+5EV voltage is output, the PNLB Assy may
be defective.
Corrective Action
If the connection up to the SW is properly made and
if the signal is not set to "L" when the SW is pressed,
the SW may be defective.
If the signal is not output, PANEL CPU (IC501)
may be defective.
If the level is "H", PANEL CPU(IC501) may be
defective.
If the level is "L", SMPS Assy may be defective.
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4
Reference
6.SERVICE
MODE
Reference
4.1 OVERALL
CONNECTION
DIAGRAM
Reference
4.3 POWER SUPPLY
BLOCK DIAGRAM
10.10 VOLTAGES
Diagnostic methods
by Assy
Reference
—
10.11 WAVEFORMS
MAIN 7,8,9
10.10 VOLTAGES
[9] Basic operation
check of CPU/DSP
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