Master Gain Control - Sony MX-710 Service Manual

8-channel mixer
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MX-710
1-1.
DESCRIPTION
MX-710 is an 8-channel mixer provided with 4-
channel
outputs.
This model
contains amplifiers to
cover
mixing loss and to improve S/N ratio. Power
Switches, Controls and Jacks
1. INPUT SELECT switch
SECTION
1
OUTLINE
supply is two-ways for operation on AC house current
or DC power source (48 V).
Operation
selectors of input source
MIC.....
for microphone input source
LINE...
for line input source
OFF .... input source disconnected
2. INPUT ATT switch
3. GAIN CONTROL
attenuators to prevent distortion caused by excessive input level
It is effective for microphone placement close t) ihe source.
It is possible to contro! each channel input level of 8-channel.
Double vertical lines of GAIN CONTROL indicate the best usable
condition.
Cursors are used for preset.
4. OUTPUT CHANNEL SELECT switch
5. MASTER GAIN CONTROL
4-channel output selectors for 8-channel inputs.
INPUT
ATT
and GAIN
CONTROL
can be adjusted according
to VU meter reading of selected output channel.
When
any output channel selector is set to B position, the same
signal feeds to output channels | and 2.
This feature
facilitates
"center-mixing"
of a monaural
sound
source
such as announcements
or a single instrument
between
L-and R-channel microphones.
This control simultaneously adjusts four overall output levels.
After finishing level set with each GAIN
CONTROL,
slide the
MASTER GAIN CONTROL to 10 at record starting.
After recording, slide the MASTER
GAIN CONTROL
gradually
down to 0. It is usually used at 10 position.
6. HEADPHONE
CHANNEL
switch:
LEVEL
control:
This switch selects output channels for monitoring.
Position
Output Channel
Left Headphone
Right Headphone
1-2
1
2
MIX
1+3
2+4
3-4
3
4
This continuously controls headphone monitor level.
INPUT
MIX x 8
LINE x 8
OUTPUT
FIXED x4
VARIABLE x 4
Normal FIXED OUTPUT level:
—10 dB (0.25 V)
Maximum
VARIABLE
OUTPUT
level:
0 dB (0.775 V)
(See VARIABLE
OUTPUT
level adjustment on page 7.)
—10
dB (0.25 V) normal level signals are fed from PRE
AMP
OUT jacks to LINE AMP IN jacks with connection cords.
SQ encoder or echo unit can be connected at JUNCTION POINT
—-2—

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