Pioneer DDJ-T1, Service Manual

Page: 27 / 135

27
DDJ-T1
5 6 7 8
5 6 7 8
A
B
C
D
E
F
[3-5] 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 "8.5 JOG DIAL ROTATIO
N LOAD ADJUSTME N T".)
Turning of the JOG dial is not detected.
1
Defective JOGB
photo interrupter
UCOM Assy
CDJ1ssy
/CDJ2 Assy
LEDB Assy
JOGB Assy
Check the waveforms on the JOG1_1,
JOG1_2, JOG2_1, and JOG2_2 signal lines.
JOG1_1: C
N 905-2 pin
JOG1_2: C N 905-3 pin
JOG2_1: C N 905-24 pin
JOG2_2: C N 905-23 pin
If any waveform cannot be recognized, connection
of that signal line may be loose or the photo
interrupter (PC3201) may be defective.
10.17
WA
V EFORMS
2
Defective
MAI
N _UCOM
(IC701)
UCOM Assy
If the symptom persists after the above
corrections.
Check the mounting status of the MAI N _UCOM
(IC701). If it is properly mounted, then the IC701
itself may be defective.
Basic Operation
Check of the
MAI
N _UCOM
Pressing on the JOG dial cannot be detected.
3
Defective
TCHB photo
interrupter
UCOM Assy
CDJ1 Assy
/CDJ2 Assy
TCHB Assy
JOGB Assy
Check the signal level of the JOG_TCH1/2
(Pins 46/47 of IC701) when the JOG dial is
pressed.
If the signal level of the JOG_TCH1/2 (Pins 46/47 of
IC701) does not become L when the dial is pressed
and H when the dial is released (not pressed,) loose
connection of the signal line or a defective photo
interrupter (IC3301) may be suspected. Each Signal
Levels
4
Defective
MAI
N _UCOM
(IC701)
UCOM Assy
If the symptom persists after the above
corrections.
Check the mounting status of the MAI N _UCOM
(IC701) and SW IC (IC702). If they are properly
mounted, then the IC701 or IC702 may be defective. —
Noise is heard when the JOG dial is turned.
5
Defective gear
Defective JOG
DIAL B
JOG Assy
There may be any scratches on the gear
or some foreign matter between the gears.
If there are any scratches, replace the scratched
gear with a new one.
If there is any foreign matter, remove it then replace
the gears with new ones.
Gears to be replaced: Load gear, Encoder gear,
JOG shaft
—
There may be any scratches or some
foreign matter on the JOG DIAL B or the
Roller B Assy.
If there are any scratches, replace the scratched
gear with a new one.
If any foreign matter is attached, remove it.
—
The JOG dial turns too freely. (The load value for the JOG dial is outside the specified range.)
6
Improper
adjustment 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 “8.5 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
“8.5 JOG Dial Rotation Load Adjustment.”
8.5 JOG Dial
Rotation Load
Adjustment.
8.5 JOG Dial
Rotation Load
Adjustment.
8.5 JOG Dial
Rotation Load
Adjustment.
8.5 JOG Dial
Rotation Load
Adjustment.
During the above adjustment, if the upper-limit
adjustment position of the Adjust Plate is reached,
oil may have been spattered on the Adjust 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.
7
Improper
adjustment 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 “8.5 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
“8.5 JOG Dial Rotation Load Adjustment.”
During the above adjustment, if the lower-limit
adjustment 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.
No. Cause/Symptom Point to be checked
Item to be checked How to distinguish a defective point and/or corrective action Reference
No. Cause/Symptom Point to be checked
Item to be checked How to distinguish a defective point and/or corrective action Reference
No. Cause/Symptom Point to be checked
Item to be checked How to distinguish a defective point and/or corrective action Reference
No. Cause/Symptom Point to be checked
Item to be checked How to distinguish a defective point and/or corrective action Reference
No. Cause/Symptom Point to be checked
Item to be checked How to distinguish a defective point and/or corrective action Reference
10.17 WAVEFORMS
JOG rotation
operation
W