7-1-5. CN-3985 Board
The CN-3985 board contains a female XLR-5 intercom connector and is connected to the input amplifier on the SW-1736
board through a harness.
7-1-6. DPR-386 Board
The DPR-386 board contains the following interface connectors.
• HD/SD-SDI out 1/2/3/4 (BNC × 4)
• REFERNSE in (BNC × 2: loop through: automatic termination)
• VBS PROMPTER in (BNC × 2: loop through: automatic termination)
• INCOM/TALLY/PGM (D-sub 25-pin connector)
This board consists of circuits for processing HD/SD video signals, audio signals, and synchronization.
SDI output
Audio and synchronization signals are superimposed in the first processing circuit (IC600) and processed signals are
then converted to HD-SDI or SD-SDI signal in the parallel-to-serial converter circuit (IC809, IC810). The converted
serial signal is output from the rear panel of the CCU.
VBS output
The SD-YCD output signal from the video signal processing circuit is converted to the VBS signal in the encoder circuit
(IC1101). Each digital PIX output signal and VBS output signal are converted to analog signals and are output from the
rear panel of the CCU.
Synchronization circuit
Upon receiving the reference signal from the external device, this circuit performs synchronization coupling (gen-lock).
Audio signal processing
Audio signals and intercom signals (ENG/PROD/PGM/Front-Intercom) restored from the receiver circuit are input to
the audio processing circuit (IC2300) to receive signal processing. Signals that are output from the audio processing
circuit include digital signals (to be superimposed on the SDI signal and the transmit signal of the AT-196 board) and
signals that are converted to analog signals and output from the front and rear panels of the CCU.
7-1-7. LED-544 Board
The LED-544 board contains 7-segment LEDs for displaying shutter speed and master gain. Display control is performed
from the SW-1736 board connected with board-to-board connectors.
7-1-8. LED-545 Board
The LED-545 board contains tally display LEDs (red and green). Display control is performed from the SW-1736 board
connected through a flexible flat cable.
7-1-9. PS-934 Board
The PS-934 board relays camera power and CCU power signals.
This board contains circuits for camera power ON/OFF control, overcurrent detection, output control, and remote output
DC-DC power.
If the ambient temperature of the PS-934 board becomes abnormal, “TEMP NG” appears disabling camera output.
HXCU-FB80
7-2
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