Motorola 4TMVG User manual

auto radio MANUAL 68P4O056A86
VOLKSWAGEN
4TMV SERIES
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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.

ALIGNMENT
Connect an output meter across the speaker voice coi1. Set volurne to rnaximurn and tone to treble. Atten-
uate signal generator output to rnaintain 2,45 volts (1 watt across 6 ohrn load) on output meter at all times
to preient receiver overloading. Cover rnust be removed to gain access to sorne of the adjustrnents'
STEP GENERATOR
CONNECTION
GENERATOR
FREQUENCY
(400 cycle mod) TUNER SET TO ADJUST REMARKS
IF ALIG
1.
RF ALIC
?.1
{MENT
Antenna recept-
acle thru.lmf
and chassis
NMENT
Antenna recept-
acle thru durnrny
(see Figure)
262.5Kc
r 61OKc
High end stop
High end stop
r, 2,3 & +
5, b & /
Adjust for rnaximurn.
Adjust for rnaximurn.
NOTE: Do not perforrn StePs 3, 4, 5
replaced, Before proceeding with Step
their effect on trimrner adjustrnent.
rnounting screw and turn bracket down
and 6 unless tuner has been tarnpered
3,backtuning cores as far as possible
Remove dial scale, dial background,
to gain access to core screws.
with or colnponents have been
out of coil forms to eliminate
then loosen pilot light bracket
Adjust for maxirnum,
Adjust for maximum, Use
alignrnent tool such as GC
type 9050-L.
Adjust for rnaximurn.
4.
Antenna recept-
acle thru durnrny
(see Figure)
il
Repeat Steps 4 and
place.
Final adjustment,
align antenna
trirnrner thru a
53rnrnf series
c apacitor
t 6l oKc
l0 20Kc
l6t o,Kc
High end stcp
Tuner carriage
9 / I6,' f.rorn high
end stop
High end stop
5, 6 & 7
8,9&10
5, 6 & 7
5 until no further increase; step 5 should be last step. Then cement cores in
16t 0Kc High end stop Adjust for rnaxirnurn. (NOTE:
The 53mrnf capacitor approx-
imates the car antenna capac-
itv. )
ANTENNA TRIMMER ADJUSTMENT IN CAR (IF NECESSARY)
8. High end stop Adjust for rnaximurn noise
with radio installed in car,
antenna fully extended and
volume control at maximum,
if needed.
signalandbend pointer until center of pointer coincides
IF IF IST IF IST IF
26L5 KC
7.
TO CALIBRATE PO]NTER
with the center of the 100Kc - Tune radio to 1000Kc
mark on dial scale.
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MODEL 4TA4VG RADIO INSIAI.I.AI'ON
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BD ASSilBLY
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INSTAtr SEAK'R 65ilELI
(sEE INSTAUTION NON 3)
MODEL 4TIAVT RAD'O 'NSIAI.IAIIONRADIO ASSilBLY REAR VIEW
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txx5ru
5PEAKER AND
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Ref
No. Part
Number Descr ipt ion Lts t
hice Ref. No. Part
Number Descr ipt ion Lls t
Pr ice
cl.pecJrcns - NorE:
I "".orre
I orlgina
I tvp" tt
c-r Lranoroaort
c-2 I *ro"nornrooa
c-3 | zrcaogoeero
c-4 I zrcaogoeeoz
c-5 I ztxseszas
c-6 I zocao+erRoz
c-7 L,"no"o"oru
c-8 Lronorr.or,.
c-e Lr..norouoo,
c-10 I 2rKs64763
c-11 I 2lC40906A08
c-12 I 23C4Ls2AArg
e-re | 3lR1er::**:
ELECTRICAL PARTS
IThe capacitors in this list art
,nded replacement types for the
.1 equipment; aI1 are ceramic d
Lless otherwise specified.
Looss rt roov (usE
I zrnrooszero)....
I 5 to 60 mmf trimmer
I .ooan nf roov.
I .os rt roov (usE 2Lc4osoolr2)
I r.o rr 3v (usE 21R1ooo3Aoz)..
I cal 25o to 39o mnf: C6B 24o
I to sso mmf dual trimmer ' ' . . .
I .oos rt roov (usE
I zrc+ogoeerb).. . .
I tso mmt loov N75o (USE
I zrnrz+eoa)......
I .oob mf toov (usE
I zl.e+ozegnor)....
I t.o rt 3v (usE 2rRrooo3Ao2)..
I .zz ^t 1oov...
I ro rt r6v lytic (usE
I 23c4t928A06)....
I tso nmt Ioov...
sc
1.30
.60
.70
45
40
1
25
30
70
50
90
20
to
v-2
v-3
v-4
v-5
v-6
48K134600 I
4aKt34602 I
4ARL34667 I
48Rr34667 I
4aRt34647 I
I
M
,t64F'42344AOll
*L9c42377 AOL I
*13D42399A01 I
*84D42590A01 I
I
*7B41644AO2 |
*15D42348A01 |
*22e.+zssetot I
*32842688A01 |
*5K611519 |
r4454381o I
*36842400A0I I
i36842396401 |
2s1^54r67g I
I
29C41506A01 I
2sK5s4326 |
I
'i64C4239AAOL I
9A531066 I
*9C41095A14 |
*34C4234eAor I
3K560695 |
*3srs40t5 I
l
3840245AO2
9K564923
I NSTALLAT
* 85T42570401
*85T42574AOL
3A40730A01
*7A425374OI
*7842530401
*784240LAOl
*8B42529A01
*29L424LOLOL
2A563491
2852t926
*2S119959
*25t24821
*3S134144
*3S134145
*4tB42528AO]-
43K47t633
*38842343A01
lV564641
*1V42300A95
76K563223
76C40706A02
*L840220AO3
5856243a
*45A4t454LOl
*52842600AO!
49A5624aO
l-v562830
3A563128
35L32220
*LB42375AOL
4].L562449
4LA562447
41A41255401
41B41805401
*77D42372AO1
4 56243t
4X692188
4K501364
44501015
25A72 (USE 48K134601)..,..
2sA72 (USE 48K1,34601).....
M54....
M54....
sP891 (USE 48R134646).....
CHANICAL PARTS
BACKGBOUND, dial...
BEZEL, radio (4TMVG, VT). . .
BEZEL, radio (4TMVW)".'...
BOARD, plated chassis: less
components
CIIANNEL, chassis support. . .
COVER, botton.
GASIIET, bezel (4T[,1VG). "...
GASKET, bezel (4TMVW)......
GROMMET, insul (radio hsg).
INSIJLATOR, trans ntg.. '....
IO.IOB, on-off , vol & tuning.
I(NOB, tone & dunmy.
LUG, terminal: blade tYPe
(spkr lead)
LUG, te"minal (fuse recept)
LUG, terni-nal (pilot light
& spkr lead). .
PLATE, adaptor ntg, "......
RECEPTACLE, ant... '
RECEPTACLE, fuse.
SCALE, diaL.
SCREW, trans ntg....
SCREIf, tpg: #8 x 5,/8 (sPkr
to spkr plate - 4TMVT). . . -
SCBEW, ma.ct': 4-4O x 5/16
(pilot socket)
SOCrET, pilot light.
2.05
2.05
2.25
2.25
5. 30
.95
r. 50
2.95
2.35
.15
.90
.lo
.L5
.05
.10
.35
.40
.05
.90
.05
.15
.90
.80
.03
o5
03
90
05
40
ON PARTS & ACCESSORIES I
ANTENNA, radio: conpl. I
(4rMvG) .. '... I e.go
ANTENNA, radio: comPl. I
(4rMvw, vT)... ......1 7.50
BOLT, rec mtg: I'4-2O x I
23'32.. ......1 .o3
BRACKET, rec mtg (4TMVG).. '. | .15
BRACKET, rec mtg (4TMVT)'...1 .2O
BRACKET, rec mts (4TMVW)....1 .2O
CAPACITOR, generator...'.'.. l'90
LUG, adaptor (pilot light I
lead).. ....'.1
NUT, hex i L'4-2O (brkt to I
rec mtg) .' .. ..' .'l
NUT, hex: L/4-2O (bolt mtg).1
NUT, hex: 8-32 (spkr mtg) . . ' I
NUT, hex: f'2-28 (rec mtg)..1
SCRiW, mach z lt4-2o x I/2 |
(rec mtg - 4TMVG)........"1
SCRETY, tpg: 10-20 x 3,/8 I
(spkr mts - 4TMVT).....".'l
SmING, static coil : wheel. . I
TUNER PARTS I
BEARING, baII... . I
BUTfi)N, push... .. ...1
CLUTCH DISC: incl set screw.l
COILS & PLATE ASSEM: tncl I
L-L,z,3 & mtg pIate... '....1 I
CORE, iron: osc.......'.....1
CORE, iron: RF & ant..'..'..1
GEAR, BUSHING & DISC ASSEM..I
GROMilET, core mtg.'.'......'l
LINK, connecting.'.'.. ''....1
POINTER & ARM 4SSEM.........1
ROLIJR, clutch release. '.... I
SCREW & NUT ASSEM: adj......1
SCREW, ret: 4-4O x 5 /16 |
(clutch disc)"..'... "..'.1
SCREW, tps2 #4 x 5'16 (to I
secure coils & PIate assem)l
SHAFT, manual tunlng; assem:l
incl ttC" washers..'....'. .l
SmING, anti-rattle.........1
SmING, clutch release..'...1
SPRING, conn link. ".....'..1
SmING, pointer tension'.. "1
TUNER, AT-468: comp1ete...'.124
WASHER, cup. ... ..'.. .l
WASHER, "C" (pointer)..'..'. I
WASHER; "C" (tuning shaft). . I
WASHER, "C" ( tuning shaft) . . I
08
03
03
05
03
05
.03
.15
.25
.75
,30
.30
.55
.10
.05
.20
.05
.15
.10
.05
.75
.05
.03
.03
.15
.85
.03
.03
.03
.03
2LK564765
23C4t928AO9
21K564764
2LD40339A64
2IC40906406
*23C4t92AAlO
23C4t92aAtO
*64A41668401
64A41668401
23C4t92a[r6
2]'D40536A44
c-15
c-16
c-t7
c-18
c-19
c-20
c-21
c-22
c-23
c-24
c-25
MISCELLANEOUS ELECT
E-l | ,r"r-rnrrt
E-2 I +ACLSISAZ
E-3 I essrzssgs
F.-4 I *SOCazSzOeOt
I *soca2sg2Aot
E-b I asatzzsas
COILS & CHOIrES
L-t,2,3
L-4 r *24C407884r1
L-s I *zsp+zosztoT
l
RESISTORS - NOTE:
I sitlon
R-r I o*, rnrro
R-2 I antzazzz
R-3 I onrzasoe
R-4 I antzgaaz
R-s I aatzl s+z
R-6 | emzzasz
R-7 I an]^zz++s
R-8 I enrrggso
R-9 | enrrgseo
t-i9 I 9r133:r1
1.0 nf 3V (USE 2LK565267).'.'
1.6 mf 25V lytic (USE
23C41928A05 )
.47 mf 3Y (USE 21R10003A01)..
.Q25 mf 100V...
.1 nf looV (USE 21840789A03)'
L000 mf 10V lytic'
I00O mf 10V lytic.
PLATE, spark.
PLATE, spark.
400 nf 10V lytic (USE
23C41928A15 )
68 nmf I00V N750 (USE
2LD40536A32)
ICAL PARTS
DIODE, 1N139..
DroDE, 1N139..
LAMP, pilot: 6.3Y-.154......
SPEAKER, 5" PM (4TMVG,W). . . .
SPEANER, 6" PM (4TMVT).. . . . .
FUSE, 5 amp..,
SEE TUNER PARTS
IMAGE IBAP.
FILTER.
11 resistors are insul-ated con
ype un1-ess otherwise specifiec
2200 LO% L/2W...
330K 10% r/zvr. . .
3300 10% t/2'/x. . .
180 r0% L/4W. , .
4700 LO% L/2W. . ,
33K 10% t/zw. . .
1800 r0% L/21il . . .
6800 10% L/2W. . .
6800 10% r/21N. . ,
r00K l-0% t/z,il. . .
,45
.90
.45
.35
1. 40
1.40
.08
.08
.70
.70
.30
7 .50
8.35
.03
55
25
I
| ':33
rPo-
T7
L7
17
L7
L7
t7
L7
t7
r7
L7
R-12
R-13
R-14
R-15
R-1"6
R-17
R.I8
R-19
R-20
R-27
R-22
6R125892
6R129101
6R127005
6R127513
6R125531
6Rr2a952
*18C4234040
6R121301
6R131179
6RI24797
6R127542
47KrO%t/2W,....
680 l-0% t/2w.....
5600 10% t/2w. . . .
1500 10% L/2W. , . .
180K 10% r/zw....
r80 10% L/2W....,
VOLUME, tone & sw
1000 10% r/zI/I. . . .
270 ro% L/2w.....
150 10% r/zl,'.....
47 to% L/2I,/J......
.L7
.L7
.L7
.L7
,L7
.L7
3.05
.17
.L7
.17
.t7
T-1
4_t
T-3
R-24
R-25 6R127516 6R127001
lEANSFORMERS
,r24D425L7AOL
*24D425L7AO2
*25D42101A06
ITANSISTORS
v-r | ,r*r-.ruo,-
82rO%r/2W.....
2.2 meg Lo% I/2W
IST I.F.
2ND I.F.
OUTPUT.
25L72. .
.17
.L7
r. 60
1.40
2.75
2.05
*NEW ITEM, APPEARS IN A},IY LIST FOR TIRST TII'IE.
REPTACEMENT PARTS TIST