Step Generator Connection; Alignment; Antenna Trimmer - Motorola VWAT Service Manual

STEP
GENERATOR
CONNECTION
GENERATOR
FREOUENCY
(400 cycle
mod)
TUNER SET
TO
ADJUST REMARI(S
iF AL
t.
RF AL
z.
iNMENT
Ant recept through
.lmf&chassis
GNMENT
Ant recept
through
dummy
(
eee
Fig.
)
262"5 Kc
1610
Kc
Hi
end
stop
Hi
end
stop
I,2,3&4
5,6&7
Adjust
for
maximum.
Adjust
for muimum.
AL IGNMENT
Connect
an
output
meter across tbe speaker voice
coil.
Set volume
to
ma:<imum and
tone to
treble.
Atteauate
the eignal gen-
erator
outp'ut
to
malntain 1.79
volts
on output
meter
at
all
times to prevent
overloadiag
the
receiver.
NOTE: Do not
perform
step6
3, 4, 5 &
6 unless the
tuner has been tampered
with
or
corirponents ba,ve been
replaced.
Re-
movetheescutcheon,dialscileassemblyanddialbackgloundplatetoexposethecorescreq/st.
BefoteproceediogwitJrstep3,
b4ckt}le tuning cores
as
far
as
posslble
out
of the
colls
to eliminate
their effect
ontrimmer
adjustmente"
3.
+,
5.
6.
Repeat steps
4
and
I
ANTENNA TRIMMER
7" I
-
I
I
GENERATOR
weak
gtation
I
around
1400
Kc
I
Adjust
for
maximum.
Adjust
for
maximum.
Adjust
for
maximum.
Step
5 should be the
last
adjustment.
'Wlth
radio lnstalled
in
car
and
an-
tenna
fully
extended, adjust anten-
na
trimmer for muimum.
DIITTT
AXTEtrXA
DETAIL
Ant recept
through
dumrny (see Fig"
)
1610 Kc
1200 Kc
l6l0
Kc
no further
Hi end
stop
Tuner carrlage
9
/3zt'
tuorn
bl
end stop
Hi
end
stop
increase, then cement tuing
5,6&?
8,9&lo
s,6&7
6CR6
DtT"AVC.AF
5 until corea in place.
'l
PLUG TO
FIT
RECEIVER
ANTENNA
RECEPTACLE
D0tfi--14
;[__ili
T2
CONN
-'*fi-ilz
,1,
,1,
TI
CONN
TO
RECEIVER
+ANTENNA
RECEPTACLE
TO
PLUG
6BA6
NOTES:
CAPACIToRS' Decimal values
in MF, all others
in MMF unless otherwise 5p&lfled.
VoLTAGES: Measured
fron
point
indicaled to
chassis
with
a
WVI/L
No
siqnal input.
Tolerance+ l0*.
INPUI
VOTi-A6E, 7V
TUNING
RANGI, 535
KC
to
1605 KC.
ti
262,5KC,
"l
ts
-*i
I
e+,si
]50
NoM
i
SCEEIATIC DIAGBAI