Pioneer CDJ-850, Service Manual

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CDJ- 8 50
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[10] Basic operation
check of CPU/DSP
[3-4] Abnormalities regarding the JOG dial
After the JOG Assy is disassembled then reassembled, be sure to check that the load value for the JOG dial is within the
specified range. (Refer to the "8.4 JOG DIAL ROTATIO
N LOAD ADJUSTME N T".)
Turning of the JOG dial is not detected
1
Defective part of
photo interrupter
DFLB Assy
JFLB Assy
JOGB Assy
Check the waveforms of signal lines.
JOG1_C (IC1007-pin 26)
JOG2_C (IC1007-pin 25)
If no waveform can be confirmed, the photo
interrupter (PC1901) may be defective.
10.14
WA
V EFORMS
2
Defective PA N EL
CPU (IC1007)
DFLB Assy
If the symptom persists after the above
corrections, Check a mounting state of PA N EL CPU (IC1007).
If the mounting is OK, the IC1007 may be defective.
Pressing on the JOG dial cannot be detected.
1
Defective part
DFLB Assy
JFLB Assy
Check the level of JOG_SW signal (IC1007
-pin 27) when the JOG dial is pressed.
If the JOG_SW signal (IC1007-pin 27) is not set to
"L" when the JOG dial is pressed and it is not set to
"H" when the JOG dial is not pressed, the SHEET
SW(DSX1078) may be defective.
2
Defective PA N EL
CPU (IC1007)
DFLB Assy
If the symptom persists after the above
corrections, Check a mounting state of PA N EL CPU (IC1007).
If the mounting is OK, the IC1007 may be defective.
N oise is heard when the JOG dial is turned.
1
Defective
attachment of
the JOG FL.
Defective gear
or JOG DIAL B.
JFLB Assy
JOGB Assy
Check if the JOG FL of the JFLB Assy has been
shifted upward from the holder.
Also check the JOGB Assy is attached normally.
The JOG FL may interfere with JOG A.
There may be any scratches on the 3
gears or some foreign object between
the gears.
If there are any scratches, replace the scratched gear
with a new one. If there is any foreign object, remove
it then replace the gears with new ones.
Gears to be replaced: Load gear, Gear A, Gear B
The JOG dial turns too freely. (The load value for the JOG dial is outside the specified range.)
1
Improper adjust-
ment or assembly
of the JOG dial
JOG Assy
Check that the load value for the JOG dial
is within the specified range, referring to
“Measuring method” in “8.4 JOG Dial
Rotation Load Adjustment.”
If it is outside the specified range, adjust the position
of the Adjust Plate to change the load value for the
JOG dial, referring to “Load adjustment method” in
“8.4 JOG Dial Rotation Load Adjustment.”
8.4 JOG Dial
Rotation Load
Adjustment.
8.4 JOG Dial
Rotation Load
Adjustment.
During the above adjustment, if the upper-limit adjust-
ment position of the Adjust Plate is reached, oil may
have been spattered on the Cam Plate.
Replace the washer, load gear, and cam plate with
new ones, then reassemble.
Resistance to turning the JOG dial is too strong. (The load value for the JOG dial is outside the specified range.)
1
Improper adjust-
ment of the JOG
dial or defective
washer, gear, or
cam plate
JOG Assy
Check that the load value for the JOG dial
is within the specified range, referring to
“Measuring method” in “8.4 JOG Dial
Rotation Load Adjustment.”
If it is outside the specified range, adjust the position
of the Adjust Plate to change the load value for the
JOG dial, referring to “Load adjustment method” in
“8.4 JOG Dial Rotation Load Adjustment.”
8.4 JOG Dial
Rotation Load
Adjustment.
8.4 JOG Dial
Rotation Load
Adjustment.
During the above adjustment, if the lower-limit adjust-
ment position of the Adjust Plate is reached, shavings
from the worn-out washer may have increased the
friction. Replace the washer, load gear, and cam plate
with new ones, then reassemble.
10.15 EACH
SIG
N AL LE V EL
No. Cause Diagnostics Point Item to be Checked Corrective Action Reference
No. Cause Diagnostics Point Item to be Checked Corrective Action Reference
No. Cause Diagnostics Point Item to be Checked Corrective Action Reference
No. Cause Diagnostics Point Item to be Checked Corrective Action Reference
No. Cause Diagnostics Point Item to be Checked Corrective Action Reference
F
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