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Motorola 4TMVG Service Manual

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MANUAL 68P4O056A86
VOLKSWAGEN
4TMV
SERIES
9 ft-
; od
r
E
=-
* vE
:
d+
l
z
E
GENERAL
INFORMATION
T
YPE
Autornotive type
all-transistor
superheterodyne
AM
radl.os.;
oper-
ate frorn 6 volt negative
ground
system.
Designed
for custom in-
stallation in
the
following
vehicles:
Model
4TMVG -
Karmann-Ghia
Model 4TMVT -
Volkswagen
T
ransporter
Model
4TMVW -
Volkswagen
Sedan
These receivers
contain
6
transis-
tors, 2 diodes
and
a
plated
chassi.s
board; they differ from
each
other
in
rnounting
hardware
only.
SERVICE STATION
PROCEDURE
L A defective in-guarantee
radio
rniist
be
ac
cornpanied
by
the Custorn-
er's
Guarantee
Policy
Tag.
Thistag
must be properly filled in by
the
Volkswagen dealer at the time
of
radio
purchase.
Accept
as
guarantee
repairs
only those
radios within
the
1 year or
I
Z,0OO
rniles
(whichever
occurs
first)
guarantee
period.
The
rernoval or re-installation of this
receiver is customarily
perforrned
by the Volkswagen
dealer
and
is
not
covered by this guarantee.
Also,
the removal of rnotor noise, tire
static,
electrical
interference,
faulty installations
and
aeri.al re-
pairs are not considered as
guar-
antee repairs and, therefore,
ex-
penses related to such
services
should be handled
by
the
car
dealer.
Z. Fil1 in
MotorolaGuarantee Labor
Clairn, Part Nurnber
58P60015A30
and
mail
Green
and
Pink
copies
to:
Motorola
Guarantee Service
Motorola
Autornotive
Products,
Inc.
9401
West
Grand
Avenue
Franklin Park, Illinois.
3. The yellow
copy
of the Motorola
Guarantee
Labor Claim is to
be
re-
tained by the authorized
service
station
for his files,
4.
Defective
parts for
guarantee
re-
pairs
rnade
on
this
rnodel
are to
be
sent to your Motorola Distributor
for free
replacement supportedwith
the defective
parts return
tag which
you
are
now using.
5,
Only those
service
shops
author-
ized by their'Motorola Distributor
can
perform
guarantee
repairs
on
a
no-charge basis to
the customer. If
you are
not
already
authorized as
a
Motorola
Service
Station andyou are
interested in
handling
this
service,
please contact your Mo'iorola
Dis-
tributor for
complete details.
TO
SET
PUSHBUTTONS
Unlock
pushbutton
by
pulJ.ing
it
out
abowt
l/2tr forward of its normal
position. Tune in station
and
lock
the pushbutton to the station
by
pushing
it in firmly,
SERVICE
N
OTES
I,
RADIO
POLARITY
-
WHEN SER-
VICING
THIS
RECEIVER,
Tflf,
rrlqtr
LEAD MUST BE
CONNECTED
TO
THE POSITIVE SIDE
OT'
POWER
SOURCE.
IF
CONNECTEDOTHER-
WISE, RECEIVER
WILL NOT
OP-
ERATE AND DAMAGE TO
COM-
PONENTS
MAY
RESULT.
2. POWER SUPPLY
REQU]RE-
MENTS - It is
preferabLe to use
a
storage battery (without a battery
charger) in
place
of
a
battery elim-
inator.
If a battery eliminator
is
used, it must be well filtered
and
regulated
and adjusted
f.or
7,}volts,
3. IMPORTANT
SERVICE
NOTE .
It is important
thatthe
tape
rernoved
from
the
outsi.de
of
the radio
during
servicing be replaced in the
sarne
location as originally
found;
this
is
necessary to prevent air
leaks.
4. PLATED
CHASSIS
REMOVAL
-
(NOTE: Before rernoval of
plated
chassis, note location
of
wires
and
cables; they
should
be
dressed
the
sarne when
the
chassis board
is re-
installed later.)
To remove the plated chassis for
servicing,
unsolder the
plated
chassis
mounting
bracket
(see
photo
on Page 2)
bend
the ears
straight,
then spread the
housing
so
that
the
bracket
ears
will
be
free of the
hous-
ing. Lift chassis
and
bracket to
a
rnore servicable
position.
NOTE:
Since
the
bracketservesas
a chassis ground,
an
external wire
must
be connected
from
the bracket
to
the
radio
housing.
AJter servicing is performed, re-
install plated chassis board
and
bracket, then bend the
bracket
mounting ears over and solder
to
housing.
5. When replacing a power
output
transistor, rernernber to use
the
transistor
specified inthe parts
list;
coat
both sides of the
transistor in-
sulator
rtuith
DC-4 grease (Motorola
Part No.
1IM490487) and securely
tighten the
transi
stor
mounting
screws.
When
replacing
a1l other
transistors,
use long-nose
pli.ers
as
a heat sink, i. e.,
grasp
transistor
leads close to transistor
base
with
the pliers to dissipate heat
while
s
olde
ring.
5. Servicing techniques
applicable
to these
rnodels
can be found
in
the
following
Motorola
publications:
ttProfitable
Transistor
Radio
Servicingtr (Motorola Part
Nurnber
68P5001
1A53)
and
"A
Discussion
of
Transistorized
Car
Radiosrt
(Motorola Part No.
68P64980'{51).
servlce
manual
TWOTOROLA
'N(C.
PART
NO.
68P40056A86 t-64
9401 WEST
GRAND
PRICE
2O
CENTS
AVEN
U
E,
FRAN KLI
N
COPYRIGHT
1964
BY
IVIOTOROLA
PARK, ILLINOIS
INC..
PRINTED
IN
U.S.A.

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