Sony HDCU1000, Maintenance Manual

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1-7 (E)
MM/HDCU1000 Series
1-6. Circuit Description
1-6-1. HDCU1000/1080/1500 Common
Front Boards
AT-167 board
The AT-167 board has the built-in microprocessor (SH2-
DSP). It controls various circuit boards inside the
HDCU1000/1080/1500 and the power supply. It also
performs the system setup including a camera.
The board performs command communication with a
camera, and with RCP, MSU, or CNU.
Also, it enables Ethernet connection by the Ethernet
controller with the built-in microprocessor.
In addition, when the optional remote control unit (RM-
B750) is installed in the front panel of the HDCU1500, it
performs the command communication with the RM-B750.
It has the built-in signal generator circuit generating HD
and SD. This signal generator circuit establishes gen-lock
with external (main) reference and also gen-lock between
HD and SD. It controls phase of all video signal outputs.
It has the sync output of one channel enabling to switch
between the HD ternary value sync signal and the SD sync
signal.
AVP-6 board
The AVP-6 board processes the audio signal, tally, and
trunk line. It has the following functions.
.
D/A-converts and outputs the MIC signals supplied from
the camera in digital format.
.
A/D converts the intercom signals (ENG/PROD/PGM/
Front-Intercom) input to the HDCU1000/1080/1500.
.
Inputs the intercom signals sent from the camera in
digital format and the A/D-converted audio signals of the
HDCU1000/1080/1500 to the digital mix IC, and
performs line selection, mixing, and volume control.
.
D/A converts the signals processed at the digital mix IC,
and outputs it to external circuits.
. R/G tally signal I/F
. Trunk line (RS-232C/422A) I/F
DTX-5 board
The DTX-5 board processes the return signals and the
prompter signals.
This board can handle the HD-SDI/SD-SDI/VBS signals as
return signals, and convert them to the specified signals
and send them back to the camera.
.
Phase adjustment is performed on the HD-SDI signal.
.
The SD-SDI signal is up-converted to the pseudo-HD
signal and its signal phase is adjusted.
. The VBS signal is converted to the digital signal equiva-
lent to the SD-Digital-Component signal, and processed
in the same way as the SD-SDI signal. The signal also
has the Frame conversion function and performs reverse
conversion (from 60 i to 24 PsF) according to the main-
line system.
The signal input as a prompter is A/D-converted, embed-
ded to the return signal and then sent to the camera.
DRX-5 board
The DRX-5 board processes the main-line signals from the
camera.
. Phase adjustment and re-clocking using line memory
. Frame conversion (2-3 Pull Down) function as necessary
.
Down-conversion function as necessary
.
Has the built-in HD/SD signal color bar generator and
supports multiple formats
. Matches the MIC signal from the camera to the delay of
the video signal, and then multiplexes it to the SDI
signal.
. Analog character output
Rear boards
SDP-12 board
The SDP-12 board processes the main-line signals sent
from the camera and the return signals to the camera. The
board converts the main-line light serial signal sent from
the camera from light to electricity and from the serial to
parallel signal.
Then, it separates the digital audio signal and the com-
mands multiplexed to the main line, and sends the main-
line video signal to the DRX-5 board, the digital audio
signal to the AVP-6 board, and commands to the AT-167
board.
Also, the return video signal is sent from the DTX-5 board,
the digital audio signal from the AVP-6 board, and com-
mands from the AT-167 board. The board then multiplexes
the digital audio signal and the commands to the return
video signal. The return signal is then converted from the
parallel to serial signal, and electricity to light, and sent to
the camera as the light serial signal.
VIF-34 board
I/F board that connects each connector on the rear panel
. I/F of MIC REMOTE, WFM REMOTE, and I/O PORT
of the D-Sub 15 pin connector
.
SYNC output, CHARACTER output
. Retains serial numbers in EEPROM.