Sony XDCAM PDW-HD1500, Руководство по обслуживанию

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9-5
PDW-HD1500/V1 (E)
Playback System
The playback video/audio data and playback proxy video/audio data are sent from the disc drive block through the ATA66
interface (CN2101/HPR-23 board) to PIER of the HPR-23 board to be written in the PIER SDRAM.
The playback audio data in the PIER SDRAM (IC2302 to 2305) is sent to the PB AUDIO DSP (IC1801, 1802) for signal
processing such as digital JOG sound processing, playback level control, and muting.
The data is then divided into two channels of mainline output and MONITOR output, and sent to VAX.
The two-channel signals sent to VAX are sent to the PB AUDIO DSP (IC1901) for signal processing such as MIX control,
muting and delay processes. Then they are sent back to VAX and distributed to each output.
The playback proxy audio data on the PIER SDRAM (IC2302 to 2305) is sent to the PROXY AUDIO DSP (IC2001,
2002), expanded oppositely to the time it was recorded, and then sent to VAX. The signal is then multiplexed and is input
to the PB AUDIO DSP (IC1801, 1802) to be used by switching with the mainline playback data as required for shuttle
playback, for example.
Analog audio output
The playback digital audio data output from VAX is sent to the audio D/A converter (IC301) on the AU-311 board for
conversion to analog audio signal. The 2-channel analog audio signals are output from the AUDIO OUT connector
(CN400, 500/AU-311 board).
Digital audio (AES/EBU) output
The playback audio data are encoded in VAX, and the serial data (4 channel) are sent to the AES/EBU driver (IC604, 605/
VPR-99 board), and output from the AES/EBU OUT connector (CN1, 2/VPR-99 board).
HDSDI output
The playback digital audio data output from VAX is input to the CN100/RX-93 board via the CN31/VPR-99 board. The
audio data are sent to the HDSDI encoder together with the playback digital video data, and are then converted to serial
digital data. The serial data is output from the HDSDI OUT connector (CN502, 503/RX-93 board).
SDSDI output
The playback digital audio data output from VAX is input to the LUNA (IC100/VPR-99 board) via the CN32/VPR-99
board. The audio data are multiplexed with the playback digital video data in LUNA. Then the multiplexed data undergoes
parallel/serial conversion, and then output from the SDSDI OUTPUT connector (CN3, 4) to the outside as the SDSDI
signal.
MONITOR output
The digital audio signal for monitoring output from VAX is sent to the audio D/A converter (IC302) on the AU-311 board
for conversion to analog audio signal. The analog audio signal is then output from the AUDIO MONITOR OUT connector
(CN600, 700/AU-311 board).
PHONES output, speaker output
The digital audio signal for headphone monitoring from VAX is sent to the audio D/A converter on the KY-624 board for
conversion to analog audio signal. The analog audio signal is then sent from the KY-624 board via HP-141 board, and
output from the PHONES connector (CN1).
The L/R ch is mixed to the D/A converter output, and then input to the speaker drive amplifier, where it becomes the
speaker output.