Pioneer CDJ-350 Service Manual page 21

5
Shifting from the STANDBY mode to another mode cannot be performed.
No. Cause Diagnostics Point
Poor connection
1 PNLB Assy
/Defective SW
2 Signal errors PNLB Assy
Defective signals
3 PNLB Assy
/SMPS Assy
[1-3] "E-8709" is displayed on the FL display after startup.
Communication between the Main CPU and Panel CPU has not been established.
No. Cause Diagnostics Point
1 Signal errors PNLB Assy
2 Power failure MAIN Assy
3 Signal errors MAIN Assy
[1-4] The Power switch flashes in red.
No. Cause Diagnostics Point
A voltage error
1 —
was generated.
Possible causes when the POWER switch flashes in red (IJO DETECT)
Signal Name Detection Mode
V+5IJO Voltage drop
V+7R6M
Voltage drop
VFDP32
Voltage drop
Voltage rise
V+1R2
V+1R25 Voltage rise
[2] Display (FL/LED)
[2-1] The FL does not light.
No. Cause Diagnostics Point
1 Power failure PNLB Assy
2 Signal errors PNLB Assy
5
6
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).
Item to be Checked
Check the TSCS, TSCK, and TSI waveforms.
Check the V+3R3/V+1R2 power voltages.
Check the level of the PNRDY signal
and the waveform of the TSO signal.
Item to be Checked
Check the level of the VDET signal.
Possible Failure Point Signal Name
Q414
V+1R2
PANEL CPU/SMPS Assy
IC205(REG)
V+1R25
SMPS Assy
Q502
V+3R3S
SMPS Assy
IC404(REG)
V-7R6A
IC103(MAIN CPU)
IC403(REG)
IC301(AUDIO DSP)
Note: See "10.10 VOLTAGES" about possible failure point.
Item to be Checked
Check the power-supply voltages
(V+5R6, V+32) of the FL.
Check the waveforms and connection of
communication line of FL in the PNLB Assy.
• FLSCLK
• FLBK
• FLLAT
• FLSO
CDJ-350
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7
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 "L", PANEL CPU(IC501) may be
defective.
If the level is "H", SMPS Assy may be defective.
Corrective Action
If the signal is not output, PANEL CPU (IC501)
may be defective.
If power is not output, a part of the power supply
section may be defective.
If the PNRDY signal level is "L" or the TSO signal
waveform is not output (fixed at either L or H), the
Main CPU (IC103) may be defective.
Corrective Action
If the signal level is "L", a voltage error was
generated.
Detection Mode Possible Failure Point
IC404(REG)
Voltage drop
IC103(MAIN CPU)
IC403(REG)
Voltage drop
IC301(AUDIO DSP)
IC201(SERVO DSP)
Voltage drop
IC303 (OP amp)
Q302,Q301(MUTE)
Voltage rise
SMPS Assy
Corrective Action
If the presence of power is not confirmed, check the
mounting statuses of the regulator IC and its
peripheral parts for each power supply. If they are
properly mounted, then the parts may be defective.
If no signal is output, the PANEL CPU (IC501) may
be defective.
If output signal is no problem, FL (V501) may be
defective.
7
8
A
Reference
—
10.11 WAVEFORMS
MAIN 7,8,9
10.10 VOLTAGES
[9] Basic operation
check of CPU/DSP
B
Reference
10.10 VOLTAGES
[9] Basic operation
check of CPU/DSP
10.10 VOLTAGES
10.10 VOLTAGES
[9] Basic operation
check of CPU/DSP
C
Reference
—
D
E
Reference
4.3 POWER SUPPLY
BLOCK DIAGRAM
10.10 VOLTAGES
10.11 waveforms
PNLB 1,2,3,4
[9] Basic operation
check of CPU/DSP
F
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