Pioneer DJM-900NXS Service Manual

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DJM-900NXS
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B
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5. DIAGNOSIS
5.1 POWER ON SEQUENCE
USB UCOMSUB UCOM MAIN CPU FPGA ETHER UCOM DSP
Reset
First boot start
Program start
Program start
Reset
FPGA_xINIT standby HIGH
Loading data into FPGA
FPGA_DONE standby HIGH
Program start
Reset
DPRAM validation
ETHER UCOM-DSP: Standby for
response to handshake request
ETHER UCOM-DSP:
Standby for handshake request
ETHER UCOM-DSP:
Standby for handshake response
MUTE setting ON
Canceling reset of SUBIC
Canceling reset of PHY
Starting power supply to the peripheral ICs
Canceling reset of DSP Flash
Entering main loop
Second boot RAM transfer
Second boot start
Starting power supply to FL
Sequece Diagram
ResetReset
NEC_B_CTRL setting to HIGH
Inhibiting SUB UCOM from
accessing FPGA
Canceling reset Canceling reset
FPGA_xPGM setting to LOW
SH_CTRL setting to LOW
Inhibiting MAIN CPU from
accessing FPGA
FPGA_xPGM setting to HIGH
Starting FPGA configuration
Canceling reset
Canceling reset
FPGA_xPGM setting to HIGH
Accepting FPGA configuration
FPGA_DONE setting to HIGH
Completion of FPGA
configuration
DSP_CTRL setting to HIGH
Notifying of starting FPGA
clock supply
Obtaining FPGA version
ETHER UCOM-DSP:
Handshake request
DSP version setting
ETHER UCOM-DSP
:
Handshake request and response
ETHER UCOM-DSP:
Handshake response
ETHER UCOM-MAIN CPU:
Handshake request
A

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