Sony PMW-EX1 Service Manual page 13

. MPEG encoder/decoder I/F signal (digital): To IC901
. Audio I/F signal (digital): To IC804
Peripheral circuits of the baseband processing IC (IC400)
are the master clock 54 MHz VCXO (X500) control circuit
(IC500 to IC504 and IC522) and the Mobile DDR
SDRAM memory (IC700, IC701).
Peripheral circuits of the built-in CPU are FLASH ROM
(IC603) and SDRAM (IC607).
The baseband processing IC (IC400) is controlled by the
system controller (IC1600). The LCD driver IC, the EVF
driver IC, SDI Co-pro, the audio system and the power
save control of the output systems are controlled by the
built-in CPU inside IC400.
4. Media Recording and Playback
DPR-289 board
Output from the baseband processing IC (IC400) is input
into the MPEG encoder/decoder (IC901).
The MPEG encoder/decoder (IC901) is the single-chip
MPEG Codec IC that encodes and decodes both the high-
quality HD video signal and audio signal in real-time. It
has various interfaces with signals such as MPEG video,
video input/output, MPEG audio, audio input/output, bit
stream input/output, and interface with the host.
IC901 output is then input into LSI (IC900) for AVIT
signal processing.
LSI (IC900) for AVIT signal processing contains the built-
in CPU and has interfaces for DDR2 SDRAM memory
(IC1000, IC1001), PCI bus, PCI-Express bus, I/O for
IC901, and serial communication with system controller
(IC1600).
IC900 is also connected to the NOR-type Flash ROM
(IC1100) to read the CPU program in the IC900 during
initial startup.
LSI (IC900) for AVIT signal processing is controlled by
the system controller (IC1600), in the same way as other
main devices, and provides the following types of func-
tions: video/audio stream control, access to the SxS
memory card, mass storage operations when connected to
USB and HDV device controls when connected to i-LINK.
Explanation of peripheral devices
<SxS memory card slot>
Two memory card slot boards (EC-62) are connected to the
dual channel PCI-Express signals coming from IC900
through a 0.5 mm pitch, 30-pin fine coaxial cables con-
nected to CN1300 and CN1301.
Furthermore, dual channel USB host signals output from
USB host controller (IC1302) are connect to the EC-62
board through fine coaxial cables just as with the PCI-
Express signals.
IC1302 is controlled by PCI bus from IC900.
PMW-EX1
<USB device controller>
USB device signal output from USB device controller
(IC1101) is connected to output board (JK-77) through the
both-sided flexible board (HN-339) from CN1805 connec-
tor, and then it is connected to USB Mini-B connector
(CN6) on the JK-77 board.
IC1101 is controlled by the dedicated bus from IC900.
If there is no USB connection, the power supply for
IC1101 drops off.
<i-Link controller >
The i-Link signal output from the i-Link controller
(IC1200) is connected to the 4-pin i-Link connector (CN3)
on the HN-319 board passing through the both-sided
flexible board (HN-319) from the CN1803 connector.
IC1200 is controlled by the PCI bus from IC900.
5. Audio system
This overview explains the audio system according to the
audio block diagram shown in Fig. 1.
MA-161 board
The MA-161 board contains a built-in microphone unit.
The MA-161 board amplifies the audio signal with the
microphone bias power supply and head amplifier (Q5,
Q7, and Q9, and Q6, Q8, and Q10). It provides the bal-
anced output for the audio signal.
AXM-35 board
The AXM-35 board is a connector board on which XLR
(3-pin) connector for external LINE/MIC input and the
[LINE/MIC/MIC +48V] input selection switch for two
channels are mounted on this connector board.
KSW-53 board
This board performs the read and tally controls for the
switch on the handle. The audio signal block relays the
audio signal between the MA-161 board and AXM-35
board.
HN-320/HN-338 flexible board
This board relays the audio signal between the KSW-53
board and the AU-313 board.
AU-313 board (Audio block)
This board controls the analog audio input signal process-
ing, as well as microphone +48 V power supply and serial
signal.
(RTC is also built on this board, but the explanation has
been omitted here.)
. Audio signal from the built-in microphone on the MA-
161 board is input to the balanced input amplifier IC101
and IC201 of this board. Output of the balanced amplifi-
er is connected to the analog switch (IC105, IC205) for
switching between [INT/EXT].
1-5