Pioneer DJM-900NXS Service Manual page 32

1
A
No. Cause Diagnostics Point
INPUT Assy
• LRCK: IC4006
2 pin
Loose connection
• BCLK: IC4007
7
/defective parts
2 pin
• MCLK: IC4008
2 pin
Loose connection
MAIN Assy
8
/defective parts
R709
MAIN Assy
B
LRCLK: IC2206
2, 4 pin
Loose connection
BCLK: IC2209
9
/defective parts
2, 4 pin
MCLK: IC2210
2, 4 pin
[2-4] No signal is input to the RETURN connector.
No. Cause Diagnostics Point
DELAY, ECHO,
SPIRAL, REVERB,
TRANS, FILTER,
FLANGER, PHASER,
ROBOT, MELODIC,
C
Prior
SLIP ROLL, ROLL,
Confirmation
REV ROLL, SND/RTN
(MIDI LFO) SW
/EFFECT ON/OFF
button
INPUT Assy
Loose connection
1 CN4002 1 pin
/defective parts
2-15
INPUT Assy
Loose connection
IC5802 1 pin
2
/defective parts
2 pin
D
Loose connection
INPUT Assy
3
/defective parts IC5802 13 pin
INPUT Assy
• LRCK: IC5802
10 pin
Loose connection
• BCLK: IC5802
4
/defective parts
12 pin
• MCLK: IC5802
11 pin
INPUT Assy
IC4009 2 pin
Loose connection
5
4 pin
/defective parts
RESET_IN1
E
INPUT Assy
Loose connection
IC4005 2 pin, 3 pin
6
/defective parts
2-7
INPUT Assy
• LRCK: IC4002
2 pin
Loose connection
• BCLK: IC4003
7
/defective parts 2 pin
• MCLK: IC4004
2 pin
F
Loose connection
MAIN Assy
8
/defective parts
R709
32
1
2
Item to be Checked
, 4 pin
2-11 2-2
Check for the LRCLK, BCLK, and MCLK
signals.
, 4 pin
2-12 2-4
, 4 pin
2-13 2-6
[Checking the RESET signal path]
Check for the RESET signal.
1-28
1-44 1-49
[Checking the CLK signal path]
Check for the LRCLK, BCLK, and MCLK
1-45 1-48
signals.
1-46 1-47
Item to be Checked
• Check that the type for BEAT EFFECT is
set to SND/RTN.
• Check that the BEAT EFFECT is set to ON.
Check that the RETURN IN signal level is H.
Check for an audio signal at the input
,
2-34
connector of the ADC.
2-33
Check for the RESET signal of the ADC.
2-35
2-38
Check for the CLK signal of the ADC.
LRCK, BCLK, MCLK
2-36
2-37
,
2-9
Check for Pins 2 and 4 of IC4009.
2-8
Check for Pins 2 and 3 of IC4005.
2-12
, 4 pin
2-11 2-1
Check for the LRCLK, BCLK, and MCLK
, 4 pin
2-12 2-3
signals.
, 4 pin
2-13 2-5
[Checking the RESET signal path]
Check for the RESET signal.
1-28
2
3
• If the signal at Pin 2 is normal and Pin 4 has
no signal, IC4006/IC4007/IC4008 must be
improperly soldered or defective.
• If the signal at Pin 2 is not normal, go to [9].
• If no problem with the signal is found, check for
the cable connection with the MAIN Assy and
the parts mounted along the communication line.
• If no problem is found, ETHER UCOM (IC501)
may be improperly soldered.
• If the signal at Pin 2 is normal and Pin 4 has no
signal, IC2206/IC2209/IC2210 must be improperly
soldered or defective.
• If a signal at Pin 2 is not normal, FPGA (IC2214)
must be improperly soldered or defective.
• If it is L, JA5801 must be improperly soldered
or defective.
• If it is H, go to [2].
If no audio signal is input to the ADC, a problem
in an analog circuit at a previous stage may be
suspected.
• If no singal is input, the Input Buffer block must
be improperly soldered or defective.
• If a signal is input, go to [3].
• If the signal level is L, go to [5].
• If the signal level is H, go to [4].
• If there is no signal, go to [7].
• If there is a CLK signal but no signal is output
from the ADC, the ADC must be improperly
soldered or defective.
• If a signal at Pin 2 is H and that at Pin 4 is L,
IC4009 must be improperly soldered or defective.
• If the singal level at Pin 2 is L, go to [6].
• If the singal level at Pin 2 is L, go to [8].
• If a signal at Pin 3 is not normal, check for BCLK
in [7].
• If the signal level at Pin 2 is H and that at Pin 3 is
normal, IC4005 must be improperly soldered or
defective.
• If a signal at Pin 2 is normal and Pin 4 has no
signal, IC4002/IC4003/IC4004 must be
improperly soldered or defective.
• If a signal at Pin 2 is not normal, go to [9].
• If no problem with the signal is found, check for
the cable connection with the MAIN Assy and
the parts mounted along the communication line.
• If no problem is found, ETHER UCOM (IC501)
may be improperly soldered.
DJM-900NXS
3
4
Corrective Action
10.41 WAVEFORMS
INPUT ASSY
10.41 WAVEFORMS
MAIN ASSY
10.41 WAVEFORMS
MAIN ASSY
Corrective Action
10.41 WAVEFORMS
INPUT ASSY
10.41 WAVEFORMS
INPUT ASSY
10.41 WAVEFORMS
INPUT ASSY
10.41 WAVEFORMS
INPUT ASSY
10.41 WAVEFORMS
INPUT ASSY
10.41 WAVEFORMS
INPUT ASSY
10.41 WAVEFORMS
INPUT ASSY
10.41 WAVEFORMS
MAIN ASSY
4
Reference
2-11 2-2
2-12 2-4
2-13 2-6
1-28
1-44 1-49
1-45 1-48
1-46 1-47
Reference
2-15
2-34
2-33
2-35
2-38
2-36
2-37
2-9 2-8
2-7 2-12
2-11 2-1
2-12 2-3
2-13 2-5
1-28