Sony HDCU3500 Service Manual page 116

The Stand-by Intercom signal that is input from the camera to the connector (CN402) is converted to a digital signal in
the A/D and D/A converter IC (IC2615), and then the digital signal is input to the FPGA (IC1200).
The MIC signal processed in the SY-467 board is converted to an analog signal in the D/A converter IC (IC2500), and
then the analog signal is output to the B to B connector (CN303). The System Intercom signal processed in the SY-467
board is converted to an analog signal in the A/D and D/A converter IC (IC2900), and then the analog signal is output
to the B to B connector (CN303). The RCV/PGM signal of the front INTERCOM processed in the SY-467 board is
converted to an analog signal in the A/D and D/A converter IC (IC2513), and then the analog signal is output to the
connector (CN400). The Stand-by Intercom signal processed in the SY-467 board is converted to an analog signal in
the A/D and D/A converter IC (IC2615), and then the analog signal is output to the connector (CN402).
The SY-467 board sends and receives the following signals.
• This board outputs the MIC signal and the AES/EBU signal (from the camera) to the AUDIO OUT connector on
the CN-4053 board.
• This board sends the PGM signal (that is input to the B to B connector (CN303) from the D-sub connector) to the
VIF-75 board.
• This board receives the Intercom signal (embedded in the signal from the camera) from the VIF-75 board, and then
outputs the Intercom signal to the Front Intercom connector (CN400) and the System Intercom connector (CN303).
At this time, the Front INTERCOM input signal, System Intercom input signal, and PGM signal can be mixed.
• This board mixes the Front INTERCOM input signal and the System Intercom input signal, and then sends the
mixed signal to the VIF-75 board.
• This board outputs the Stand-by Intercom input signal (from the camera) to the Front INTERCOM connector
(CN400) and the System Intercom connector (CN303).
• This board mixes the Front INTERCOM input signal and the System Intercom input signal, and then sends the
mixed signal to the camera as a Stand-by Intercom signal (CN402).
TRUNK signal
The TRUNK signal from the TRUNK connector on the CN-4054 board is input to the SY-467 board. The audio signal
(multiplexed with the audio channel of the return signal through the VIF-75board) is sent to the camera. The TRUNK
signal from the camera is multiplexed with the audio channel of the serial digital video signal. In the SY-467 board, the
TRUNK signal from the camera is extracted and is output to the TRUNK connector on the CN-4054 board.
LAN signal
The LAN signal can be input to and output from the LAN-COM connector on the CN-4052 board. The LAN signal is
input to the FPGA (IC600) from the connector (CN600) on the SY-467 board. The signal format is converted, and then
the signal is sent to the CPU (AT-195 board). The (AT-195) control signals from the CPU (AT-195 board) are input to
the FPGA (IC600), and are then output from the LAN-COM connector on the CN-4052 board through the connector
(CN600).
NETWORK TRUNK signal
The NETWORK TRUNK signal from the NETWORK TRUNK connector on the CN-4052 board is input to the FPGA
(IC600) from the connector (CN600) on the SY-467 board. The signal format is converted, and then the signal is input
to the FPGA (IC1200). Packet data that passes this connector (CN600) is embedded into the Link-B data of the serial
digital video signal through the VIF-75 board for communication with the camera.
Power unit interface
The FPGA IC (IC1200) monitors and controls the power unit through the I2C interface. This IC is connected through
the B to B connector (CN301).
Power IC interface
The FPGA IC (IC1200) monitors and controls the power ICs (IC001, IC002, IC003, IC004, and IC203) through the I2C
interface.
HDCU3500/HDCU5500
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