Pioneer DJM-900NXS Service Manual

44
DJM-900NXS
1
2 3 4
A
B
C
D
E
F
1
2 3 4
5.6 DIAGNOSIS OF V+34D
G
MAIN ASSY
The driver power output for the FL (V+34D) is controlled with a transistor switch.
1 Check V+34D_1 at the prior stage of the transistor (Q1409).
2 If no signal is detected at V+34D_1, the mounting status of the peripheral parts of the 34V DC/DC converter (IC1401)
may be improper or IC1401 itself may be defective.
3 If a signal is detected at V+34D_1, check the input signals to IC1403.
If PowerReset is L, check the connection up to SW power (DWR1492).
If FL_Vcont is L, the mounting status of the MAIN_CPU (IC2011) may be improper or IC2011 itself may be defective.
4 If both PowerReset and FL_Vcont are H:
If the output signal from IC1403 is L, the mounting status of IC1403 may be improper or IC1403 itself may be defective.
5 If the output signal from IC1403 is H, the mounting status of the peripheral parts of Q1408 or Q1409 may be improper or
Q1408/Q1409 may be defective.
Diagnostic procedures when only V+34D is not output
4
1
5
3
2

Pioneer DJM-900NXS Specifications

General

Sample rate	96 kHz
Frequency range	20 - 20000 Hz
Channels quantity	4 channels
Digital sound processing	24 bit
Number of EQ bands per channel	3
Line Signal-to-Noise Ratio (SNR)	107 dB
Total Harmonic Distortion (THD)	0.004 %
Microphone in	Yes
Line inputs (RCA)	6
Phono inputs (RCA)	2
USB 2.0 ports quantity	USB 2.0 ports have a data transmission speed of 480 Mbps, and are backwards compatible with USB 1.1 ports. You can connect all kinds of peripheral devices to them.
Digital audio coaxial out	1
Power consumption (typical)	42 W