Pioneer CDJ-900 Service Manual page 34

1
A
EUP mode cannot be exited.
No. Cause Diagnostics Point
Defective
1 DFLB Assy
PANEL CPU
Disconnection,
breakage, or
2 SRV Assy
loose connection
of cables
Defective SW
SW power
3
power supply supply
B
[10] SERVICE MODE
[10-1] The measured error rate is outside the specified range in Player Operation mode.
No. Cause Diagnostics Point
Scratches or
1 DISC
dirt on the disc
C
Scratches or
2 DISC
dirt on the disc
Any foreign
Traverse
3
matter attached
mechanism
Improper
Traverse
4
assembly
mechanism
Improper
Traverse
5
assembly
mechanism
Any foreign Traverse
6
mechanism
matter attached
D
Traverse
Any foreign
7
mechanism
matter attached
8 Signal errors SRV Assy
9 Signal errors SRV Assy
Traverse
10 Defective pickup
mechanism
[10-2] The drive does not work during Test Operation mode.
The LD does not emit light.
E
No. Cause Diagnostics Point
1 Defective pickup
The spindle motor does not rotate.
No. Cause Diagnostics Point
1 Signal errors SRV Assy
2 Signal errors SRV Assy
F
3 Signal errors SRV Assy
34
1
2
Item to be Checked
Check that the signal from Pin 28 of the
PANEL CPU (IC8005) changes from L to
H during mode shift.
Check that the signal from EUP_CONT
(Pin 3 of the CN7301) changes from H to
L during mode shift.
If the symptom persists after the above
corrections,
Item to be Checked
First, whether the cause is attributable to the
disc or to the player must be distinguished.
Check if the recording surface of the disc is dirty.
Measure the error rate, using the same disc that
produced the bad error rate but using the addresses
in a different area. If the error rate measured in a
different area is OK, the CD is defective.
Check if any foreign matter, such as shavings,
dirt, or dust, is attached to the lens of the
Pickup Assy.
Check that the traverse mechanism has
been securely installed.
Check that the loading mechanism Assy
has been securely installed.
Check for any foreign matter on the spindle
table.
Check if any foreign matter is attached to
the magnet portion of the Pickup Assy.
Check that the waveforms of the RF, ARF_P,
and ARF_N signals form clear eye patterns.
Check that the signal from RW/XR (Pin 7 of
CN7001) is H during playback.
If the symptom persists after the above
corrections,
Item to be Checked
Check the LD current and measure the
-
resistance value of the actuator.
Item to be Checked
Check that the MUTE1 signal becomes H
after loading is completed.
Check that the SPDLEC signal is a PWM
signal with 1.65 V at the center.
Check that the SLIN1 signal to Pin 29 of
IC7002 is 3.3 V when disc rotation is at
full speed.
2
3
Corrective Action
The PANEL CPU (IC8005) may be defective. Check
the soldering of the PANEL CPU and its periphery.
If the soldering is OK, then replace it.
The signal line cable may be defective.
If it is loosely connected, securely connect it.
If it is broken, replace it.
The SW power-supply is defective. Replace it.
Reference: Signal logic during EUP mode
EUP_CONT
PANEL CPU(IC8005) pin28
CPU_EUP_CONT
Corrective Action
If it is clearly dirty, replace it with a CD of good
condition.
If the error rate measured in a different area is OK,
the CD is defective. Replace the CD with one in good
condition. If no error rate measured in various areas
throughout the entire surface of the CD is OK, go to [3].
Clean the lens.
If it has not, reinstall it properly.
If it has not, reinstall it properly.
Remove any foreign matter.
Remove any foreign matter.
If their waveforms are not of the same quality, check the
mounting status of the FEP (IC7004). If it is correctly
mounted, then it may be defective. Replace it.
Check the mounting status of the SODC (IC7008).
If it is properly mounted, then the port may be
damaged. Replace it.
See "5.3 Failure Judgment of the Pickup Assy" for
details.
Corrective Action
See "5.3 Failure Judgment of the Pickup Assy" for
details.
Corrective Action
If the signal is not output, check the mounting statuses
of the DRIVER IC (IC7002) and SODC (IC7008)
terminals. If they are properly mounted, then the SODC
(IC7008) may be defective. Replace it.
If the signal is not output, check the mounting statuses
of the DRIVER IC (IC7002) and SODC (IC7008)
terminals. If they are properly mounted, then the SODC
(IC7008) may be defective. Replace it.
If the signal is not input, check the connections.
If soldering is improper, resolder it.
CDJ-900
3
4
Reference
Refe to "Signal
logic during
EUP mode."
-
Normal mode EUP mode
L H or open
H L
X L
X : Not Concerned
Reference
-
-
-
-
-
-
-
10.15
WAVEFORMS
1
10.1 SRV
ASSY(1/2)
5.3 Failure Judgment
of the Pickup ASSY
Reference
5.3 Failure Judgment
of the Pickup ASSY
Reference
10.1 SRV
ASSY(1/2)
10.1 SRV
ASSY(1/2)
10.1 SRV
ASSY(1/2)
10.15 WAVE-
9
FORMS
4