Sanyo PLUS P20 - Alignment Procedures; Preparation; Reference Level Adjustment; Offset Adjustment

ALIGNMENT
. Level adjustment of peak power indicator
| TEST OSCILLATOR
(OSCILLATOR & ATTENUATOR) ©
: OSCILLOSCOPE
OUTPUT (SP).
SET
PLUS P20
1.
Preparation
|
|
Load
Open
Oscillator
1
kHz
Power
display
range
OFF
(x
1)
Speaker
AorB
2.
Adjustment
of
reference
level
Adjust
the
attenuator
so
that
the
output
voltage
of
the
output
SP)
terminal
eames
15.5V.
At
this
time,
turn
SVR751
(L-ch)
and
SVR851
(R-ch)
until
the
LEDs
(D760,
860)
of
6OW
begin
to
light
up.
Turn
the
attenuator
to
damp
the
input
by
0.2
dB;
at
this
time,
make
sure
the
LEDs
are
put
out.
3.
Adjustment
of
offset
Adjust
the
attenuator
so
that
the
output
voltage
of
the
output
(SP)
terminal
becomes
0.7V.
At
this
time,
turn
SVR752
(L-ch)
and
SVR852
(R-ch)
until
the
LEDs
(D752,
852)
of
0.12W
begin
to
light
up.
Turn
the
attenuator
to
damp
the
input
by
1
dB;
at
this
time,
make
sure
the
LEDs
are
put
out.
4. Checking of range selection
Adjust
the
attenuator
so
that
the
output
voltage
of
the
output
(SP)
terminal
becomes
15.5V.
Damp
the
attenuator
by
10
dB,
and
make
sure
the
LEDs
(D757,
857)
of
6W
light
up.
Then
change
the
range
switch
to
ON
position
(x
0.1),
and
make
sure
the
LEDs
(D760,
860)
of
GOW
light
up.
(Make
sure
the
lighting
level
of
the
GOW
LEDs
(D760,
860)
is
within
the
range
ou
9.8
to
10.4
dB
of
the
attenuator).
5.
Checking
of
performance
| |
In
the
state
of
item
4
above,
raise
the
attenuator
by
3
dB,
and
make
sure
all
the
LEDs
are
lit.
Damp
the
attenuator
by
28
dB,
and
make
sure
only
the
OW
LEDs
(D751,
851)
are
lit.
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©
PEAK POWER
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