Cp-407A Board; Cn-3372 Board; Sw-1628 Board; Led-528 Board - Sony PWS-4400 (SY) Service Manual

Multi port av storage unit
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9-pin remote connectors
The DM-154 board contains four pieces of 9-pin remote connectors (CN2001 to CN2004).
Each signal is connected to the SYS1 CPU on the SY-422A board through the PLD (IC2) that has the serial input/output
function.
1-4-7.

CP-407A Board

The CP-407A board contains the CPU (IC401) and the CP FPGA (IC2001) for graphic control.
The CPU (IC401) operates on the program stored in the flash memory (IC802). This program can be upgraded by using
the USB connector (CN103) on the SY-422A board.
The CPU (IC401) is connected to the DRAM (IC402, IC403) and the NVRAM (IC601).
The CP FPGA (IC2001) is connected to the DRAM (IC1801) and converts the half HD signal sent from the DIO-95
board on the rear of the unit to a desired moving image size, expands the converted size of data in the DRAM, and then
sends it back to the DIO-95 board to display it on the multi-monitor.
The CP FPGA (IC2001) runs on the program stored in the flash memory (IC2803) connected to the CPLD (IC2801).
This program can be upgraded through the CPU (IC401).
1-4-8.

CN-3372 Board

The CN-3372 board is a relay board to the fans.
This board is connected to the MB-1206 board with the connector CN1 and has an electrical connection with the SY-422A
board.
This board supplies power to the fans and monitors fan revolution speed to detect failure through the connectors CN2
to CN5 connected to the fans.
1-4-9.

SW-1628 Board

The SW-1628 board contains a power switch and indicator, a reset switch, and connector CN002 for connection to the

LED-528 board.

This board is connected to the HP-160A board with a flexible flat cable from the connector CN001.
1-4-10.
LED-528 Board
The LED-528 board contains an LED to light the illumination on the front panel in blue.
Lighting of this LED is controlled by the CPLD (IC11) on the HP-160A board through the SW-1628 board.
1-4-11.

MB-1206 Board

This board is the motherboard of the unit, functioning as interface with each board.
1-4-12.
MEC-40 Board
The MEC-40 board functions as the host of the memory board MDC-19, having the communication log function.
The FPGA (IC400) controls the MDC-19 board, enabling 3.0 Gbps high-speed serial communication by 4LANE.
The high-speed serial signal is connected to MDC-19 boards (up to four boards) through connectors CN101 to CN108.
IC700 writes log data of high-speed serial communication with the MDC-19 board to the flash memory (IC800, IC801).
PWS-4400
1-27

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