Pioneer CDJ-350 Service Manual page 22

1
A
[2-2] The LED does not light.
No. Cause Diagnostics Point
1 Signal errors PNLB Assy
Defective parts
2 PNLB Assy
of LED
Defective parts
3 PNLB Assy
of transistor
B
[3] Operations (Keys/variable controls/JOG)
As operations of all keys, variable controls, and JOG dial can be checked in Service mode.
[3-1] No key functions
STANDBY, USB STOP, PLAY, CUE, LOOP IN/OUT, RELOOP, LOOP DIVIDE+, or LOOP DIVIDE- key does not function.
No. Cause Diagnostics Point
Loose connection
1 Related point
/Defective SW
Defective PANEL
2 PNLB Assy
CPU (IC501)
C
The signals from other keys are analog and connected to multiple switches.
No. Cause Diagnostics Point
Loose connection
1 Related point
/Defective SW
Defective PANEL
2 PNLB Assy
CPU (IC501)
[3-2] Rotary selector not controllable
No. Cause Diagnostics Point
D Defective rotary
1 PNLB Assy
selector
Defective PANEL
2 PNLB Assy
CPU (IC501)
[3-3] Variable controls not controllable
Tempo slider not controllable
No. Cause Diagnostics Point
Loose
1 PNLB Assy
connection
E
Defective tempo
2 PNLB Assy
slider
Defective PANEL
3 PNLB Assy
CPU (IC501)
F
22
1
2
Item to be Checked
Check that the control signal for the LED
is output from the PANEL CPU (IC501).
Check that the forward voltage (2.2 - 2.7 V)
is present at both ends of the LED.
If the symptom persists after the above
corrections,
Item to be Checked
Check if there is loose connection on the
signal line from the PANEL CPU (IC501)
up to the SW.
If the symptom persists after the above
corrections,
Item to be Checked
Check if there is loose connection on the
signal line from the PANEL CPU (IC501)
up to the SW.
If the symptom persists after the above
corrections,
Item to be Checked
Check if the signals from the RENC_1, RENC
_2, and RENC_SW signal lines are normal
when the rotary selector is turned or pressed.
If the symptom persists after the above
corrections,
Item to be Checked
Check if there is loose connection on the
signal line from the PANEL CPU (IC501)
to the tempo slider (VR501).
Check the TEMPO signal level.
If the symptom persists after the above
corrections,
CDJ-350
2
3
Corrective Action
If no signal is output, check a mounting state of
PANEL CPU(IC501). If the mounting is OK, the
IC501 may be defective.
If the forward voltage is not present, then the LED
itself is defective.
The transistor may be defective.
Corrective Action
If there is no loose connection and if the signal does
not become "L" when the SW is pressed, that SW is
defective.
Check a mounting state of PANEL CPU(IC501).
If the mounting is OK, the PANEL CPU may be
defective.
Corrective Action
If the SWs connected to the signal line function
properly and if the connections are properly made,
the SWs may be defective.
Check a mounting state of PANEL CPU(IC501).
If the mounting is OK, the PANEL CPU may be
defective.
Corrective Action
If the signals are not normal, check the connections of
the signal lines. If the connections are properly made,
the encoder (S527) may be defective. Replace it.
Check a mounting state of PANEL CPU(IC501).
If the mounting is OK, the PANEL CPU may be
defective.
Corrective Action
If the connections of signal line are improper,
resolder it.
If the voltage of the TEMPO signal line (IC501-pin 97)
does not change between 5.0 V and 0 V, the tempo
slider may be defective.
Check a mounting state of PANEL CPU(IC501).
If the mounting is OK, the IC501 may be damaged.
3
4
Reference
[9] Basic operation
check of CPU/DSP
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—
Reference
—
[9] Basic operation
check of CPU/DSP
Reference
—
[9] Basic operation
check of CPU/DSP
Reference
—
[9] Basic operation
check of CPU/DSP
Reference
—
—
[9] Basic operation
check of CPU/DSP
4