Pioneer SX-770 Installation, Operating And Service Manual page 13

MPtONEER
ALIGNMENT OF
MPX SECTION
Position of
Switch:
SELECTOR ........ FM AUTO
AFC.....OFF
Volume Control
Setting: Fully
Counterclockwise
lnput Signal:
Main (L
+
R)
40.5kHz Deviation (60%)
19kHz
Pilot
7.SkHz Deviation
(10%)
ALIGNMENT
OF AM
SECTION
Position of Switch:
Selector........AlV]
Volume Control Setting: Fully
Counterclockwise
STEPS
Circuit
to
be
Adjusted
I
nput
Connect
VTVM
Alignment
Connections
Signal Adjust
Reanarks
1
Set
the
VRl
(in
MPX
Unit) to
minimum
2
Separation
MPX
SG
to
FM antenna
terminal
LorR
A
C
VTVM
8or10
L1
Adjust
for
minimum
deflection
of
the other channel
3 Separation
MPX SG to
FM antenna
terminal
LorR
A
C
VTVM
8orlO
VRI
L1
Adjust
for
minimum
deflection
of
the other channel
4
Repeat STEPS 2 and
3 several times
STEPS
I
nput
Dial
Setti ng
Output
Equipment
Connections
Alignment
Equipment
Connectors
Frequency
Level
Adjust
Remarks
1
Sweep Generator
Antenna
terminal
through dummy
455kHz
50dB
Point of
no
i
nterference
as
near
as
525kHz
VTVM
Oscilloscope
T5
T6
T7
{!just for
maximum
sensitivity and
sym-
metrical
characteristics.
10
2
Signal Generator
600kHz
30dB
600kHz
Oscilloscope
T8
Adjust
for
maximum
def lection
Antenna terminal
through dummy
10
3
Signal Generator
1,400kH2
30dB 1,400kH2
Oscilloscope
cr2
Adjust
for
maximum
deflection
Antenna
terminal
through dummy
10
4 Repeat STEPS 2
and
3 several rimes
5
!igll9"rr!'_
Antenna terminal
through
dummy
600kHz
30dB 600kHz
VTVM
Oscilloscope
Ll (Adjust
ing core)
Adjust
for
maximum
def
lection
10
b
Signal Generator
't,400kHz
30dB
1.400kH2
VTVM
Oscilloscope
cr1
Adjust
for
maximum
def lection
Antenna terminal
through dummy
10
7 Repeat STEPS 5 and 6'several times
It