Sony XDCAM EX PMW-EX3, Руководство по обслуживанию

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PMW-EX3
1-7
MIC/LINE1
(XLR)
MIX
AMP
MUTE
MIC/LINE 2
(XLR)
SPEAKER
MUTE
HP OUT
(PHONE
MINI)
MUTE
MUTE AMP
AV Monitor
Out1
(Line Out1)
AV Monitor
Out2
(Line Out2)
AMP
AMP
AMP
AMP
+
MONITOR LEVEL
SEL/
AMP1
GPIO
+48V /MIC / LINE -2
-24
+48V
-24
+48V
A/D
D/A
I2S
AUDIO IF
FIL AGC LVL
PGA
GAIN
PGA
GAIN
INT MIC1
with
HEAD AMP
+12dB
INT MIC2
with
HEAD AMP
+12dB
SEL/
AMP2
SEL/
MIX1
SEL/
MIX2
BAL
AMP
BAL
AMP
I2C
MONI1-1,2-1,
MONI2-2,2-1,
BEEP,
MUTE
+48V /MIC / LINE -1
PWR or
DET
MUTE
BAL
AMP
(GAIN SEL
CH1)
BAL
AMP
Linked/
Separated
LINE 3/4
Digital Audio
OUT 1
CLOCK DIV
(1fs,64fs,256fs)
Digital Audio
IN 1 or 3
GAIN MAKE
OUT 2
Digital Audio
IN 2 or 4
CLOCK DIV
(1fs,64fs,256fs)
MONI CH2-2
MONI CH2-2
BEEP
BEEP
(Base band)
AUX IN( L)
AUX IN( R)
Display
Block
(Base band)
IC800(2/2)
IC800
IIC to
GPIO
Display
Block(T-on)
I2C
INT/EXT1,INT/EXT2
MIC/LINE/+48V-1,
MIC/LINE/+48V-2,
COPY1to2, LINK2to1, LINK1to2
A/D
D/A
I2S
AUDIO IF
FIL AGC LVL
PGA
GAIN
PGA
GAIN
Q5,Q7,Q9
IC101
IC201
INT/
EXT 1
INT/EXT 2
CH1 CH1/CH2
Linked/
Separated
IC102
IC202
Q110,
Q111
(GAIN SEL
CH2)
Q210,
Q211
Q103 to Q105, Q301,Q302
Q203 to Q205,
Q321,Q322
IC105,
IC205
IC103,
IC104
IC203,
IC204
Q6,Q8,Q10
I2C
MONI CH-1
MONI CH2-1
CLOCK DIV
(1fs,64fs,256fs)
DP_O_CAM_
AU_DT12O
(DP_O_CAM
_AU_DT34O)
DP_I_CAM_A
U_DT34O
DP_I_CAM_A
U_DT12O
Q103
Q104
IC100,
IC102(1/2)
IC101,
IC102(2/2)
Q1
Q2
CN2
Q100 to Q102
IC803
IC401 to
IC404
IC104, IC105
I2C MPX
(DEVICE CONTROL)
MA-164 AU-318
JK-84
DPR-289A
(2/2)
HP-144
ASW-66
DPR-289A
(1/2)
HN-337 (1/2)
HN-347
JK-81
LED-469
HN-337(2/2)
KSW-54 SWC-48
HN-344
HN-328
HN-343
AXM-36
IC800(1/2)
IC801
IC804
C-PLD
Recording
signal
Playback
signal
Fig. 1. Audio block diagram
.
Audio signal from the built-in microphone on the MA-
164 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].
. The DC-DC converter (IC1, Q1) for microphone power
+ 48 V is built-in, and when EXT MIC + 48 V is going to
be supplied, the EXT MIC + 48 V is supplied by the
switch (Q301, Q302, Q321 and Q322).
. The audio input signals from MIC and LINE are input to
a common circuit that receives both of the MIC input
level (
_
8 dBu to
_
65 dBu) and the LINE input level (
+
4
dBu). The input attenuator is inserted in the circuit
switch (Q103 to Q105, Q203 to Q205) as required. This
audio input signal is received by the balanced input
amplifier (IC102, IC202) that performs amplification of
0/+12 dB and switching (Q110, Q111, Q210, Q211) in
accordance with the level that is set by INPUT TRIM.
After that, the audio signal is connected to the [INT/
EXT] switch (IC105, IC205).
. The [INT/EXT] switch (IC105, IC205) performs not only
the INT/EXT switching but also performs the input
channel mode selection [CH1/ (CH1/CH2)].
. SEL/AMP (1, 2) is a signal selector and buffer amplifier
to perform AGC link.
. Serial control
The I 2 C control signal from Display Block (Base band)
is converted into GPI, and performs switching such as
[INT/EXT], [LINE/MIC/MIC
+ 48], [CH1/ (CH/CH)],
and AGC [Linked/Separated] for CH1 and CH2.
DPR-289A board (Audio block)
The AU-318 board is comprised of two pieces of the
Audio Codec IC and the C-PLD.
.
Audio Codec (IC800, IC801)
The analog audio signal from the AU-318 board is
connected to IC800 and IC801 that are the Audio Codec
(PGA, ADC, DSP, Digital IF, headphones amplifier,
speaker amplifier are built on one chip and the parame-
ters are set with I
2
C).
The Input TRIM (PGA) functions in the [MANUAL]
mode, and AGC functions in the [AUTO] mode to
control the audio signal level. The analog signal after