Pioneer DJM-900NXS Service Manual page 30

1
A
No. Cause Diagnostics Point
INPUT Assy/
MAIN Assy
Loose connection
8
LINE_SEL*
/defective parts
Representative
LINE_SEL1
2-14
INPUT Assy
IC4009/IC4010
Loose connection 2 pin, 4 pin
9
Representative
/defective parts
RESET_IN
RESET_IN1
B
INPUT Assy
IC4005 2 pin, 3 pin
Loose connection
10
AD/DA_RESET
/defective parts
BCLK
INPUT Assy
LRCLK: IC4002/IC4006
BCLK: IC4003/IC4007
MCLK: IC4004/IC4008
2 pin, 4 pin
Representative
Loose connection
11
LRCLK_IN_2
/defective parts
LRCLK
BCLK_IN_2
BCLK
C
MCLK_IN_2
MCLK
Loose connection MAIN Assy
12
/defective parts R709
MAIN Assy
LRCLK: IC2206 2,4 pin
1-44 1-49
Loose connection
BCLK: IC2209 2,4 pin
13
/defective parts
1-45 1-48
MCLK: IC2210 2,4 pin
1-46 1-47
[2-2] No signal is input to the DIGITAL connector.
D
No. Cause Diagnostics Point
DIGITAL, CD/LINE,
Prior
PHONO, LINE, USB
Confirmation
*/* selector/TRIM
MAIN Assy
IC101(CH1)
IC201(CH2)
Loose connection
1 IC301(CH3)
/defective parts
IC401(CH4) -5 pin
Representative
CH1_SPDIF
MAIN Assy
IC110(CH1)
E
IC202(CH2)
Loose connection
IC302(CH3)
2
/defective parts
IC402(CH4) -21 pin
Representative
DIR_RESET
1-11
MAIN Assy
IC110(CH1)
IC202(CH2)
IC302(CH3)
IC402(CH4)
Loose connection
• LRCKO: 10 pin
3
/defective parts
• BCKO: 11 pin
• SCKO: 4 pin
• DOUT: 12 pin
F
Representative
1-8
30
1
2
Item to be Checked
[Checking the RELAY block]
Check for the LINE_SEL* signal.
If the input selector is set to PHONO,
the LINE_SEL* signal level is H.
If the input selector is set to CD/LINE,
the LINE_SEL* signal level is L.
[Checking the RESET signal path]
Check for the RESET signal.
2-9
2-8
[Checking the RESET signal path]
2-7 Check for the RESET signal.
2-12
[Checking the CLK signal path]
2-6
Check for the LRCLK, BCLK, and MCLK
2-13
signals.
2-3
2-12
2-2
2-11
[Checking the RESET signal path]
Check for the RESET signal.
1-28
[Checking the CLK signal path]
Check for the LRCLK, BCLK, and MCLK
signals.
Item to be Checked
Confirm on the screen that the selector
is set properly.
Check if a signal is input to DIGITAL
properly.
1-6
Check that the RESET signal level of the
DIR is High.
Check for the LRCKO, BCKO, SCKO,
DOUT signal output from DIR.
1-9 1-7 1-10
2
3
• If a LINE_SEL* signal is not output properly,
check for loose connection with the MAIN Assy,
improper part mounting status for communication,
or improper mounting of the MAIN CPU.
If there is no problem, the MAIN CPU (IC2011)
may be defective. Replace it.
• If a LINE_SEL* signal is output properly, this
block must be improperly soldered or defective.
• If the signal level at Pin 2 is H and that at Pin 4 is
L, IC4009/IC4010 must be soldered impropely or
defective.
• If the signal level at Pin 2 is L, go to [10].
• If the signal level at Pin 2 is L, go to [12].
• If the signal level at Pin 3 is not normal, check for
BCLK in [13].
• If the signal level at Pin 2 is H and that at Pin 3 is
normal, IC4005 is soldered improperly or defective.
• If the signal level at Pin 2 is normal and Pin 4 has
no signal, IC4002/IC4006/IC4003/IC4007/IC4004
10.41 WAVEFORMS
INPUT ASSY
2-18 2-19
/IC4008 must be improperly soldered or defective.
• If the signal at Pin 2 is not normal, go to [13].
If no problem is found, ETHER UCOM (IC501)
must be improperly soldered or defective.
• If the signal at Pin 2 is normal and Pin 4 has no
signal, IC2206/IC2209/IC2210 must be improperly
soldered or defective.
• If the signal at Pin 2 is not normal, FPGA (IC2214)
must be improperly soldered or defective.
If any of the signals is not input, IC101(CH1)
/IC201(CH2)/IC301(CH3)/IC401(CH4) may be
defective.
• If it is H, go to [3].
• If it is L and IC504 has no problem, ETHER
UCOM (IC501) must be improperly soldered or
defective.
• If a signal is output, go to [4].
• If any of the signals is not output, IC110(CH1)
/IC202(CH2)/IC302(CH3)/IC402(CH4) may be
improperly soldered or defective.
DJM-900NXS
3
4
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
MAIN ASSY
10.41 WAVEFORMS
MAIN ASSY
Corrective Action
10.41 WAVEFORMS
MAIN ASSY
10.41 WAVEFORMS
MAIN ASSY
10.41 WAVEFORMS
MAIN ASSY
4
Reference
2-14
2-9 2-8
2-7 2-12
2-6 2-13 2-3
2-12 2-2 2-11
1-28
1-44 1-49
1-45 1-48
1-46 1-47
Reference
1-6
1-11
1-8 1-9
1-7 1-10