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Motorola VWA63 Service Manual

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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
o\
o-
@
\o
J
J
z.
=
9
(Yt
Fo
rr<
a=
=>
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.

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