Audio System; Audio Signal Flow - Sony PMW-160 Service Manual

i-LINK controller
The i-LINK signal that is output from the i-LINK controller (IC1300) by controlling IC1300 from the media block
controller (IC1000) is sent to the 4-pin i-LINK connector (CN1300). IC1300 is controlled by IC1000 through the PCI
bus.
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Audio System

FP-179 Board
The FP-179 board relays audio signals between the internal microphone and the KSW-62 board.
AXM-48 Board
This connector board contains EXT LINE/MIC input XLR (3P) connectors and LINE/MIC/MIC+48 V input select
switches for two channels.
KSW-62 Board
• The KSW-62 board amplifies the internal microphone by the bias power supply and the head amplifiers (Q102 and
Q104, Q103 and Q105) and outputs balanced audio signals.
• When the line input level (+4 dBu) is selected for the EXT input signal, an input attenuator is inserted by switches
(Q150 to Q153, Q158 to Q162).
• A speaker is connected to the speaker connector (CN102).
IF-1182 Board
The MIC input level (-30 dBu to -60 dBu/10 dB step) of the EXT input signal is common to the LINE input level (+4
dBu: input reference -30 dBu selected), and the gain of this signal is adjusted by the switches (Q302 to Q305, Q308 to
Q309).
AU-342 Board
The AU-342 board mainly has motherboard, audio, and RTC functions.
Motherboard function
The AU-342 board relays signals to main boards (DPR-343, DCP-61) and power supply boards (RE-299, RE-300) as
a motherboard function.

Audio signal flow

• Input
Analog audio input signals are transferred from the IF-1182 board through the HN-386 board and the A/D converter
to the FPGA (IC501). The digital playback signal (bidirectional bus) is transferred from the DPR-343 board to the
FPGA.
• Input processing by FPGA
The EE input signal is selected by the FPGA and is transferred to the DSP (IC601). The playback signal is transferred
to the DSP.
PMW-160/PMW-150/PMW-EX260
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