Pioneer DDJ-T1, Service Manual

Page: 26 / 135

26
DDJ-T1
1 2 3 4
A
B
C
D
E
F
1 2 3 4
[3-2] Rotary selector not controllable
1
Defective
AUTO_LOOP
of the CDJ1
CDJ1 Assy
Check that the signal lines (L_E N C1_1/
L_E N C1_2) are normal during rotation of
the rotary selector.
L_E
N C1_1: C N 3002-1 pin
L_E N C1_2: C N 3002-2 pin
If the signals are not normal, check the connections of the
signal lines. If the connections are properly made, the
rotary selector (S3030) may be defective. Replace it.
Each Signal
Levels
2
Defective
AUTO_LOOP
of the CDJ2
CDJ2 Assy
Check that the signal lines (L_E N C2_1/
L_E N C2_2) are normal during rotation of
the rotary selector.
L_E
N C2_1: C N 3502-6 pin
L_E N C2_2: C N 3502-5 pin
Check that the signal lines (CUR_E N C1/
CUR_E N C2) are normal during rotation of
the rotary selector.
CUR_E
N C1: C N 4002-21 pin
CUR_E N C2: C N 4002-22 pin
If the signals are not normal, check the connections of the
signal lines. If the connections are properly made, the
rotary selector (S3527) may be defective. Replace it.
Each Signal
Levels
3
Defective
DJM
BROWSE
DJMB Assy
If the signals are not normal, check the connections of the
signal lines. If the connections are properly made, the
rotary selector (S4027) may be defective. Replace it.
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).
If it is properly mounted, then the IC701 itself
may be defective.
Basic Operation
Check of the
MAI
N _UCOM
Basic Operation
Check of the
MAI
N _UCOM
Basic Operation
Check of the
MAI
N _UCOM
[3-3] VRs or sliders not controllable
The variable controls on the CDJ1 and CDJ2 Assys or the sliders on the CHFD and CRFD ASSYs are not controllable.
V Rs on the DJMB ASSY not controllable.
1
Loose
connection
CDJ1/CDJ2 Assy
CHFD Assy
CRFD Assy
Check for any loose connections on the
signal line from the MAI
N _UCOM (IC701)
to each variable control or slider.
If any connection on the signal line is improper, resolder
the parts.
—
2
Defective
sliders or
V Rs
CDJ1/CDJ2 Assy
CHFD Assy
CRFD Assy
V Rs: Check the signal level.
Tempo slider: Check the levels of the
ADCT and ADI
N signals.
CHFD, CRFD: Check the signal level.
V Rs: If the voltage of the signal from a V R (Pin 2) does not
change between 3.3 V and 0 V , that V R may be defective.
Tempo slider: If the value of the voltage of the ADCT signal
(Pin 4) is other than 1.65
V , or if the voltage of the ADI N
signal (Pin 2) does not change between 3.3 V and 0 V , the
tempo slider may be defective.
CHFD, CRFD: If the voltage of the signal from the CHFD
or CRFD (Pin 2) does not change between 3.3
V and 0 V ,
the slider may be defective.
Each Signal
Levels
Each Signal
Levels
3
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.
4
Loose
connection
DJMB Assy
Check for any loose connections on the signal
line from each
V R to Analog SW_IC (IC4001,
IC4002, IC4003) and the main microcomputer
(IC701).
Signal line: AD_0–4, AD_SW_A, AD_SW_B
If any connection on the signal line is improper, resolder
the parts.
—
5 Defective V Rs DJMB Assy V Rs: Check the signal level.
V Rs: If the voltage of the signal from a V R (Pin 2) does not
change between 3.3 V and 0 V , that V R may be defective.
6
Defective
MAI
N _UCOM
(IC701)
UCOM Assy
If the symptom persists after the above
corrections.
Check the mounting statuses of the MAI N _UCOM (IC701)
and the Analog SW_IC (IC4001, IC4002, IC4003).
If they are properly mounted, then the IC701, IC4001,
IC4002, or IC4003 may be defective.
[3-4] NeedleSearch error
1
CDC IC Error/
N eedlepad dis-
abled (Incl. steps 4
and 5 of [4] Error
indications in the
6. Service Mode) UCOM/CDCB
Assy
Check the communication waveform
between the needlepad and the MAI
N _
UCOM (IC701).
If the waveform is not proper, check the communication
line, resistors, and capacitors.
Check also that the cables between the boards and their
connections are proper.
If the normal status is not recovered after all above steps
are performed, the CDC IC or the MAI
N _UCOM (IC701)
may be defective.
2
Only some of the
commands from
the needlepad are
recognized.
UCOM/CDCB
Assy
Check that no foreign matter is between
the
N eedlepad board and the cabinet.
If the N eedlepad operates improperly although there is no
foreign matter between the N eedlepad board and the
cabinet, check [2] above.
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
CDC IC control 1/2