Diagnosis; Troubleshooting - Pioneer PLX-1000 Service Manual

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5. DIAGNOSIS

5.1 TROUBLESHOOTING

[1] Abnormality regarding startup
A
The unit is not turned ON.
Is the Power cord
securely plugged in?
Yes
Is the fuse (FU01) on
the AC PCB Assy intact
B
(not blown)?
Yes
Does the POWER switch
(SW201) on the
PLAY PCB Assy work?
Yes
Are CN901 and CN103 on
the D.D. MOTOR Assy
securely connected?
Yes
C
Is the chip fuse (P04) on
the D.D. MOTOR Assy intact
(not blown)?
Yes
Some part may be in failure.
Replace the AC&PLAY PCB Assy, transformer, D.D. MOTOR Assy, then the
MAIN PCB Assy, in that order.
The turntable does not rotate, even
though the unit is turned ON.
D
Is the voltage selector
properly switched?
Yes
Is there any foreign
matter between the
turntable and motor?
Yes
E
Are the chip fuses (P03/05/06/07)
on the D.D. MOTOR Assy
intact (not blown)?
Yes
Does the PL/ST switch
(SW202) on the
PLAY PCB Assy work?
Yes
Does the START/STOP
button LED light when the
button is pressed?
F
Yes
The motor or the control system may be in failure.
Replace the D.D. MOTOR Assy then the MAIN PCB Assy, in that order.
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2
No
Securely plug in the Power cord.
No The circuitry may have been
shorted out. Replace the
AC&PLAY PCB Assy.
No
Replace the POWER switch.
No
Securely connect them.
The circuitry may have been
No
shorted out. Replace the
D.D. MOTOR Assy then the
MAIN PCB Assy, in that order.
No Switch the voltage selector
properly.
If voltage ranging from 110 to 120 V is input
with the voltage selector set to 220-240 V,
the turntable cannot rotate, even though all
LEDs on the panel are dimly lit.
No
Remove any foreign matter.
The circuitry may have been
No
shorted out. Replace the
D.D. MOTOR Assy then the
MAIN PCB Assy, in that order.
No
Replace the switch.
No The control system is in failure.
Replace the MAIN PCB Assy.
PLX-1000
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3
No LEDs light nor do keys work
even after the POWER switch is
turned.
The proper voltage (3.3 V) may not
be output from IC309 on the MAIN
PCB Assy.
Check that there is proper
conduction between the plane
of IC309 on the MAIN PCB Assy
and GND.
The specified rotation speed
cannot be changed.
Is there any foreign
No
matter between the
turntable and motor?
Yes
Do the tact switches
No
(SW203/204) on the
SPEED PCB Assy work?
Yes
Do the strobe patterns change
No
after the TEMPO RESET button
is set to ON then the [33]
or [45] button is pressed?
Yes
Does the [33] or [45] button
No The LED is in failure. Replace the
LED light or go dark when
the corresponding button
is pressed?
Yes
The motor may be in failure.
Replace the D.D. MOTOR Assy.
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4
* This problem actually occurred
with a sample product.
Remove any foreign matter.
Replace the faulty switches.
The command is not input to the
CPU. Replace the MAIN PCB Assy
then the SPEED PCB Assy,
in that order.
LED (D203/204) on the SPEED
PCB Assy or SPEED PCB Assy.
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