Motorola VWA63 Service Manual
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auto
radio
VWA63
MANUAL
68P64988A3I
IWOTOROLA
GENERAI
INFORMATION
TYPE
Automotive
type all-transistor
superheterodyne AM radio for stand-
ard broadcast reception; operates
from
6
voltnegative ground
system.
Designed for
custom
installation in
the
I 958- I 963
Volkswagen.
This
receiver
contains 7 transistors and
2
diodes.
SERVICE
NOTES
i.
Make certai.nthe
rrArr
lead
is con-
nected to the
positive
(+)
side of
the
power
source, otherwise,
damageto
receiver rnay result. If
a battery
eliminator is usedas apower source
in
place
of
a
battery, it mustbe
well
filtered
and regulated.
2,
When replacing a
power
output
transistor, remernber to use
the
transistor specified in the parts
list; coat both sides
of
the transis-
tor insulator with DC-4 grease
(Motorola
Part No.
I1M490487)
and
securely
tighten
the
transistor
mounting s crew;s.
When replacing
a1l other transistors, use long-nose
pliers
as a heat sink,
i.
e.,
grasp
transistor
Ieads
close to transistor
base
withthe
pliers to dissipate heat
while soldering.
MOTOROTA
AUTO
1.
A Motorola
Branded
Model
is
one
that has
the Motorola
name
and
is
distributed
to dealers
through
the
Motorola
Distributors.
Z.
This
rnodel
is
guaranteed
for all
parts and
labor,
including
removal
and
re-installation
(R
& R)
for a
period of
two
years from
the date of
purchase.
The
following
rePairs
are
not
covered under
this
guarantee:
the elimination
of rnotor
noise,
tire
static,
electrical
inter-
ference
and
faultY
installation.
Charges
for these
rePairs
are
to be
paid
by the customer.
3.
Before
perforrning
a
warrantY
repair
on a
Motorola
Branded
Auto
Radio,
you must
first
receive
the
Custornerrs
Car
Radio
Guarantee
and
Service
Booklet,
The installa-
tion and rnodel
inJorrnation
on
the
lu
service
manual
6
6
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€
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@
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z.
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d
3.
Servicing
techniques
applicable
to
this rnodel
can
be found
in
the fol-
lowing
Motorola
publications:
rrProfitable
Transistor
Radio Ser-
vicingrr
(Motorola
Part
Number
68P500I IA53)
and
rrA
Discussion of
Transistorized
Car
Radiosil
(Motorola
Part
No. 68P64980A51).
4.
POWERTRANSISTOR
CURRENT
ADJUSTMENT
-
AJter
rePlaci.ng
a
power transistor,
the collector
cur-
rent should
be checked
and adjusted
for
proper operation.
A.
Insert
a 1ow
range
(0-I
or
0-2
arnp)
DC amrneter
in
the
PrirnarY
ground
return
lead
of
the outPut
transforrner
(T-4).
Connect
the
negative
terminal
of
the rneter
to
ground. CAUTION:
Be
sure
the
speaker
ground lead
is connected
in
common
with
the transforme
r ground
lead
to
the positive
terrninal
(see
RADIO
WAR,R.ANTY
SERVICE
booklet
must
be fil1ed
in bY
the
selling
dealer at
the time of
retail
sa1e.
The Customerr
s Car
Radio
Guarantee
and
Service
Booklet
rnust
show
that the
radio
is within
the
warranty
period
to be repaired
under
the Motorola
Auto
Radio
Guarantee.
4.
To
obtain
your
labor a].lowance
for the servicing of
the custorners
in-warranty set,
fill in the Motorola
Auto Radio
.Warranty
Labor Claim,
Part Nurnber 54P480884,
If
you
perform
a R
&
R
service,youare
entitled
to the
R
&
R
allowance, If
you
only repair
the radio without
R & R
service,
you
are entitled
to
the
labor
allowance. However,
if
you perform both
R & R and
the
repair,
then be
sure
to indicate both
on
your
clairn form for both allow-
ances.
After the form
has been
schematic
diagram). Speaker
rnust
be connected.
B.
Turn
the
radio on
and allow it to
heat up
for about
I5
minutes.
C.
Adjust
the bias control
(R-
I
6)
for
a reading of
480
rna with
6.3
volts
input
to the radio
rrAr'
1ead.
NOTE:
Two values of radio
input
voltage
are
given as a
convenience
to
se rvice
personnel in order
to ac corn-
rnodate
different
power
sources.
The
current
value
stated
on the
schematic
diagrarn
is for 7 volts
input to the
radio
!rAil
lead.
TO SET
PUSHBUTTONS
Unlock
pushbutton by pulling it out
abott
i/2',
forward
of
its normal
position. Tune
in station and
lock
the
pushbutton to the station
by
pushing it in
firrnly.
STATION
PROCEDURE
filled
in, rnail the white
and
green
copies
to
your
Motorola
Distributor
for
payrnent. The
yellow
copy
is to
be retained
in the Service Station
file.
5.
The
pink copy of
the Motorola
Auto Radio Warranty
Labor Clairn
is used
to
return any
defective
parts
on the repair
of the radio
to
your
Motorola
Distributor
for free
replacernent.
5. Only
those
service
stations
au-
thorized
by
their Motorola
Distribu-
tor can
perforrn repairs within
the
warranty
period
on
a
no-charge
basis to the
custorner,
lf
you
are
not an Authorized
Motorola Auto
Radio
Service Station,
and
you
are
interested
in handling
this service,
please contact
your
Motorola
Dis-
tributor
for cornplete
details.
*]OTOROLA
PART
NO.
68P64988A31
,NC.
94c^1
rnlEST
L2-62
G RAN
D
AVEN
mrcE 20 csNTs
UE,
FRANKLIN
PARK,
ILLINOIS
PRINTED
IN U.5.A.