Cn-3661 Board; Cn-3662 Board; Cn-3663 Board; Au-358 Board - Sony HSCU300RF Service Manual

1-11-5.

CN-3661 Board

CN-3661 board provides two channels of MIC signal output.
1-11-6.

CN-3662 Board

The CN-3662 board is connected to the DPR-361 board with flexible wire to output SD analog signals (PIX and VBS
signals) to external devices. This board also outputs REFERENCE, PROMPTER, and RET input signals from external
devices to the DPR-361 board.
The INCOM/TALLY/PGM connector for interface with external devices outputs input signals to the DPR-361 board.
The 28 V power for the RCP generated on the PS-739D board is output from the CN-3663 board through the CN-3662
board.
The fan power FAN 12V is generated from 15 V on the CN-3662 board and is output. This board also detects fan
operation.
1-11-7.

CN-3663 Board

CN-3663 board outputs the RCP signal and SYNC/WF signals.
1-11-8.

AU-358 Board

AU-358 board contains tally (red/green) and status indicator LEDs, menu operation switches, intercom switches, and a
microphone amplifier gain. Selection of the microphone amplifier gain, BIAS power on/off, and balance/unbalance is
set by the CCU menu.
The CCU control panel HKCU-FP2 is detected by the AU-358 board, and HKCU-FP2 signals are sent through the
AU-358 board.
1-11-9.

CN-3664 Board

CN-3664 board contains an intercom connector (XLR-5, female). This board is connected to the AU-358 board.

1-11-10. PS-739D Board

The PS-739D board generates DC 38 V and 180 V for the camera, 28 V for the RCP, and 15 V for the CCU from the
AC line power input, and supplies these power voltages. Commercial power 100 to 240 VAC is supplied from the rear
AC inlet through the front AC switch. The internal LV converter supplies 15 V for the CCU and 28 V for the RCP. The
internal HV converter supplies CAM 38 V and 180 V. When the CCU is connected to the camera, 38 V is output first.
After that, when the connected camera is recognized, 180 V is output upon reception of the CAM POWER ON signal
from the CCU.

1-11-11. CT-257D Board

The small CT-257D board located on the PS-739D board contains an internal protective circuit, a PLD circuit for CHU
output control, and a 28 V output regulator for RCP.
HSCU300RF/HSCU300R
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