1958-64 Motorola VWA64/VWM64 Radio - Service Manual

a,uto radio
MANUAT 68P64988A6I
MODELS VWA64, VWM64
/Y\
IUOTOROLA
-,v^-
service manual
following Motorola publications:
ttProfitable
Transistor
Radio
Servicingti (Motorola Part Number
GENERAL INFORMATION
Automotive type all-transistor
superheterodyne AM radios for
68P60011A53) and ttA Discussion of
Radios"
Car
Transistorized
standard broadcast reception; operate from 6 volt negative ground
(Motorola Part No. 68P64980,{51).
4. POWER TRANSISTOR CURRENT
ADJUSTMENT - After rePlacing a
power transistor, the collector current should be checked and adjusted
for proper operation,
A. Insert a low range (O-1 or 0-Z
arnp) DC arnrneter in the primarY
ground return lead of the outPut
transformer (T-4), Connect the
negative terrninal of the meter to
ground. CAUTION: Be sure the
speaker ground lead is connected in
common with the transf ormer
ground lead to the positive terminal
(see schematic diagrarn). Speaker
system. Designed for custom installation in the 1958 - 1964Volkswagen. These receivers contain 7
transistors and 2 diodes.
SERVICE N OTES
1. Make certain the rtArrleadis con'
nected to the positive (1) side of the
power source, otherwise, damageto
receiver rnay result. If a battery
eliminator is used as apower source
in pJ,ace of a battery, it rnust be well
filtered and regulated.
2, When replacing a powex output
transistor, rernember to use the
transistor specified inthe parts list;
coat both si.des of the transistor insulator with DC-4 grease (Motorola
Part No. 11.M490487) and securelY
tighten the transistor mounting
screws. When replacing all other
transistors, use long-nose pliers as
a heat sink, i. e., grasp transistor
leads close to transistor base with
pliers to dissipate heat while
must be connected.
B, Turn the radio on and a1low it to
heat up for about 15 minutes.
C. Adjust the bias control (R- 15) for
a reading of 480 ma with 6.3 volts
input to the radio I'Atr lead,
NOTE: Two values of radio inPut
voltage are given as a convenience to
service personnel in otder to ac-
solde ring.
comrnodate diff e rent power source s'
3, Servicing techniques applicable
to these models can be found in the
The current value stated on the
tnoDEL vwA64
MODEL VWhl64
schernatic diagram is for
put to the radio "A't lead.
7
volts in-
5. REAR SPEAKER - The RS-4
(with fader control - less speaker)
or RS-7 (5 x 9 - 3.2 ohm t'ith fader
control) rear speaker kits can be
used with these radios,
TO SET PUSHBUTTONS
(vwA64
ONLY)
Unlock pushbutton by pulling
it
out
abolal I/2tt forward of its normal
posi.tion. Tune in station and lock
the pushbutton to the station
pushing it in firmly,
bY
MOTOROLA AUTO RA DIO WARRANTY SERVICE STATION PROCEDURE
1.. A Motorola Branded Modelis one
that has the Motorola name and is
distributed to dealers through the
Motorola Distributors.
6
6
@
o,
€
d
@
o
{\o
=
3
:)
+
I
:
3
z
v,
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g
L
o
o
Z, These rnodels are guaranteedfor
all parts and labor, including re-
moval and re-installation (R & R)
for a period of two years frorn the
date of purchase, The following repairs are not covered under this
guarantee: the elimination of motor
noise, tire static, electrical interference and faulty installation.
Charges for these repairs are to be
paid by the customer.
3. Before performing a guarantee
repair on a Motorola Branded Auto
Radio, you must first receive the
Custornerrs Car Radio Guarantee
and Service Booklet. The install-ation and model information on the
.
booklet must be filled in by the
selling dealer at the time of retail
sale. The Custornerrs Car Radio
Guarantee and Service Booklet rnust
show that the radio is within the
guarantee period to be repaired
under the Motorola Auto Radio
Guarantee.
4. To obtain your labor allowance
for the servicing of the customers
in- guarantee set, fill in the Motorola
Guarantee Labor Clairn, Part No.
68P50016A30. If you perform a
R & R service, you are 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 youperform
both R & R and the repair, then be
sure to indicate both on your claim
form for both allowances. AJter the
forrn has been filled in, mail the
pink and green copies to Your
Motorola Distributor for payrnent.
The yellow copy is to be retained in
the Service Station file.
5. Defective parts forguaranteerepairs made are to be sent to Your
Motorola Distributor for free replacernent supported with the defective parts return tag, Part Number
54P591 808.
6. Only those service stations authorized by their Motorola Distributor
can perform repairs within the
guarantee period on a no-charge
basis to the custorner. If you are
not an Authorized Motorola Auto
Radio Service Station and You are
interested in handling this service,
please contact your Motorola Distributor for complete details.
IUOTOF'OLA tNto. 94a1 WEST GRAND AVENUE, FRANKLIN PARK ILLINOIS
PART NO. 68P64988A61
l2-63
PRICE
20
CENTS
PRINTED
IN
U.5.A.
ATIGNMENT
Connect an output rneter across the speaker voice coil. Set volume to rnaximurn and tone to treble. Attenuate signalgeneratoroutputto rnaintain I watt (1.79 volts across 3.2 ohm load) on output meter at all tirnes.
GEN FREQ
(400 cycle 30% rnod)
GENERATOR
CONNECTION
EP
ADJUST
REMARKS
end stop
r,2,3
Adjust for rnaxirnum
Hi end stop
5,6,7
&8
Adjust for maxirnum
TUNER SET TO
ALI( ]NMENT
r.l
262.5 Kc
To collector of
RF amp thru
.lrnf & chassis
&4
RF AL] GNMENT
2.
Ant recept thru
I6l o Kc
durnmy (see
figure)
4, 5 & 5 unless the tuner has Ueen tarnpered with or associated cornPoIf necessary, rernove the escutcheon, dial background and the pilot light
socket to expose the core screws. Before proceeding with Step 3, back the tuni.ng cores as far as
possible out of the coils to eliminate their effect on trirnrner adjustments.
Do not perforrn Steps
3,
nents have been replaced.
3.
Alt recept thru
1
Adjust for rnaximurn
5,6,7
Hi end stop
610 Kc
&8
dummy (see
figure)
Tuner carriage
.295" (yWA64)
or .298r, (VWM54)
from Hi end stop
Hi end stop
l610 Kc
il
5.
5.
I200 Kc (VWA64)
1020 Kc (VWM64)
tt
4.
Repeat Steps 4 and 5 until no further increase; Step
screws in place.
5
9, 10,
& lz
I1
Adjust for maxirnum
Adjust for maxirnum
s, 6,7
&8
should be last step. Then, cement core
ANTENNA TRIMMER
Adjust for rnaximum with
radio installed in car and
antenna fully extended.
Weak station
?.
around I400 Kc
TO FIT RECEIVER
DUilIAY ANIENNA
DETAIL
*l.I{ESE ADJUSruENTS
R16
ARN
ACCESSIBLE F'ROM FNONT'
(SEE SERVICE
RADIO
NOTES) *
ANT
RECEPT
o
a
o
UST
I BOT )
VWM64 AI.'GNAIENI I.OCAI'ON DEf A'L
VW
A64 AI,,GN/UENI I.OCAI,ON
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-
____________
!
_i
uo'
VWA64 REPTACEMENT PARTS
Ref.
Part
No.
Number
Descr
ipt lon
ETECTRICAI. PARTS
- NOTE: fhe capacitors 1n thls list are
r
recome rded replacenent types for the
orlgina L equipment; all are ceraml-c disc
I
type un Less otherwise speclfied.
I
| 40 to 43o mmf trimmer
| ,o"unnot,
I enroooaesl l.oOS rt 2oov mylar (usE 8R1O11oAo2)
I zoxsarora
l2o to t2O mmf trimmer
ls.2 nnt Soov Fc
I zrnrzorss
I ^oos rr soov
I zrsrzeosa
I zoxsnror+
to tzo mmf trimmer
lzo
,05 mf 20OV nylar
I axrzsass
I exrsrzes
.OO5 nf 2OOV mylar
.05 mf 10oV (USE 2IA74o805)
I ztststzsq
.05 mf I00V (USE 21A740805)
I zrsrsrzsa
15O nnf SOOV N7sO
I zrsrzlzza
I zts'tzzszt
.0o5 mf SOov (USE 21RI28634)
6.4 mf 4OV lytic
I zsrs++asz
I zsxss+asz
6.4 mf 40V lytic
. O1 nf 1OOV
I zrsrszros
I ztslszszs
.002 nf lO0V
I zroaosssess .O3 mf 10OV
. OI nf 100V
I zrsrszros
I e'arssol zz
PLATE, spark
zsxsatsao
25 nf 3V lytlc
II AXr3r799
.01 nf 1OOV nylar
. O1 mf 100V mylar
I sxrsrzgg
I exr3rzsg
.01 nf loov mylar
I zrslrooso
100 nmf SOOV N75O
I zoxsatzoo
310 to 390 mf trinmer
. O1 nf 10OV
I zrsrszros
I zsce+zzzeos 350-500-500 nf,z8V lYtlc
I zsxs+szte
50O nf 8V l-ytic
I oaxssorzz
PLATE, spark
CAPACIT ORS
I
c-r
c-2
c-4
c-5
c-6
c-7
c-8
c-9
c-10
c-11
c-L2
c-13
c-r4
c-15
c-16
c-L7
c-18
c-19
c-20
c-2t
c-22
c-23
a_ti
c-25
c-26
c-27
c-28
c-29
LIST
Ref.
Part
No.
Number
Descr
T-4
25C64607AOL
ourPUT (usE 25C64607A02)
ipt ion
lEANS SToRS
v-1
v-2
v-3
Y-4
v-5
v-6
v-7
| 25A72
48Kl34602
48Kl34601
(USE 48Kr34601)
I 2sA72
I suzrz
I zstzz (usE 48Kr346or)
I usa
I use (usn 48813466s)
I spasr (usE 48Rr34646)
48R134635
48Kl34600
48R134654
48R134673
44RL34647
I
I AECHANICAT PARTS
I
7K5447t2
428733793
L5X544715
15I(543815
13C543880
14A543810
36X544747
36154474a
36K544760
29464647l.OL
BRACKET, dlal bkgnd
CLIP, co11 shleld
COVER, back
I
I
I
I
I
I
I
I
COVB, bottom
ESCUICHEON, dlal
INSI,LATOR, trans.
KNOB, pendant
lctoB, tone
KNOB, vol & tuning
LUG, termlnal ('A" lead)
LUG, termlnal: spla
lr.tesx, arar(control
mtg)
I N!'I, pat
I tlUT, speea (d1al scale)
*29S 101344O2
13K544668
2S7051
2570A7
I RECEFTACLE, ant
94472I4A
9K544713
I RECEPTACLE, fuse (USE 9x534968)
34864793AO2 I SCALE, dial
mtg
3K560695
I SCREW, trans
94543479
I SOCKET, pilot light
98542339
I socKEt, trans,
I
INSTAL LATION PARTS
8
I
ACCESSORIES
I
MISCELI ANEOUS ELECTR ICAL PARTS
I nr.rrnurt
I recrsassz
E-1
E-2
DIODE, 1N139
DIODE, 1NI39
I socsqszzs
I osnrosoz
I asn's.zzsqs
E-3
E-4,
E-5
7A543889
88538244
88544383
*29A64647AO2
SPEAKER, 5" Pll: 3.2O
LAl,lP, pilot
FUSE,5amp:1AG
1V544036
VC
6A4L4l
TUNER
I 25Bs43338
CHOtrE, filter
I zaea+zsstos cHotcE, Rr
L-5
L-6
-
NOTE:
sition
R-27
B-28
R-29
R-30
I
I
I
I
I
I
onrzssoe
enr oossna:l
eRrzzsro
emzszzi.
enrzaoee
emzzssz
I antzszzt
T-1
T-2
T-3
IRMERS
roo
| ,n".nrrroot
I
zqse+alta,oz
I zsso+oroeos
I
I
|
|
I
|
I
I
|
44856375A
I
4rL56244s
I
I
4tA562447
arearzsseor
I
77K5652os
I
|
4rBs62bo3
I
4x501364
41692188
4A56243L
4K564253
12700 LO% L/2w
I
I
34563128
35127896
l22OO LO% L/2vt
SUPPRESSOR,
nolse
R5-7 REAR.
I
I
I
I
IRIMPLATE: lnel tubing
BEARING,
ball
& DISC ASSEM: lncl setscrew
COILS & MTG PLAIE ASSEM: 1ncl L-1,
L-2,L-3 & L-4
iron: osc
lron: RF & Ant
GEAR BUSEING & DISC ASSEM.
GROMf.IET, core mtg
LINX, conn
CORE,
CORE,
POINTER
PUSI{BUTTON
ROLLm, clutch release
& NUT ASSEM:
SCREW, set: 4-4O x
dlsc assem
SCREW, tpg: 4-4O x
SCREW
adj
5,/16; clutch
1V530175
l,/4 (colls ntg)
nanual tunlng
(clutch rel.
SmING, anti-rattle
SRAFT,
bar )
SmING, clutch release
SIRING, conn llnk
SmING, pointer tenslon
TUNER, AT-43O: complete
IfASHER, "C" (manual shaft ret)
IfASHER, "Crr (polnter ret)
I{ASEER, cup (clutch rel sprlng)
WASIIER,
sprlng (manual shaft)
I
CONII,OL, fader:
I
GRILLE, spkr
I
IG{OB,
l5O 20% Lw
control
I
Lo% r/2w
I
I
I
I
50c533088
lst IF: 262.5
2ta tr, 262.5
WW
1Vs43186 LUG, ground: incl lead
2s1376
NIn, hex: 3/8-32 (control mtg)
35r2a262 SCREW, mach: 8-32 x lrr (spkr mtg)
I
I
&
SPEA KER
SEAI
18Bs43088
13C543043
I
I
co11)
I
RS-4 &
I
lEANSF(
|
1V562830
I
n-26
I
38K565210
4sAs624ao
I
l+to ro% L/2,tt
l22K LO% L/2w
I 330K 20.% L/2w
I az Lo% L/2w
I roo ro% L/2ttl
rc% r/2w
lro
I qt fi% L/2w
I
4sA412s4Aol
I
I enrzgezs
I onrrsgzo
I enrzzers
l
*1840875A02
l
coil
LUG, terminal (Lgnltion
MTC PARTS KIT
NUT: radlo mtg
CLUTCH
18563899
sBs624sa
L
R-21
R-22
R-23
R-24
R-25
l
76K563288
76K563286
I
CAP, lgnttlon
1
1V41800A32
A 11
rec mtg
l
PARTS
1V564641
reslstors are insulated compot fpe unless otherwise speclfled.
I 6Rr25568
22K LO% L/2W
R-1
I enrzsssz
R-2
15oK 10% t/21fl
I entzzasz
R-3
I 33X Lo% L/2w
R-4
I ezx ro% Ll2w
I onrzsrzs
I 6R127541
B-5
I sox Lo% L/zw
R-6
6F.l2lA47
I 4700 LO% L/2W
6Rr270gg
R-7
lzzo to% L/2v
R-8 ,12 18C64734AO3 I confnol, vol-tone-sw
R-9
6RL25L79
I azr Lo% r/2v
R-lo
6R129875
12200 ro% L/2w
R-11 6RL24507
I oax to% L/2w
I PART OF R-A
R-12
R-13
6Rr2;s68
lzzx ro% L/2w
6R1 24668
R-14
I ro Lo% r/2w
6X54380O
R-15
I ro Lo% L/2w Fc
R-16
r8c64735A08 I CONrROL, blas
R-17
I 6vr2922r
| 100 r0% L/21fl
I enrzrsaz
R-18
I 4700 LO% L/2W
R-19
I onrzra+z
l+zoo Lo% r/2w
I enrzzsrg
R-20
I rsoo Lo% r/2vt
r
I
43K47163?
I
RESISlT R,S
l
rv64s6a1.22
cHores
8
l
21rs76
I
COILS
BRACKET,
CAP. generator
Kc
Kc
31A533215
onrvrn (usE 25c646roAos)
*NEW
2sA76280
2sK762A2
I
I
I
I
I
ITEM, APPEARS IN ANY LIST FOR FIRST TIME.
SPEAXm, PM: 6 x 9;3.2Q
VC (RS-7
ONLY)
STRIP, terminal
TmMINAL, pLn: black (spkr conn)
TERI|INAL, pln: whlte (splc conn)
VWM64 REPTACEMENT PARTS
IIST
Descr
ETECTRICAT PARTS
R-29
- NOTE: Tlle capacltors in this list are
recommended replacement types for the orlginal equlp_
ment; all are ceramic disc type unless otherwise
spe c if ied .
CAPACITORS
c-1
c-2
c-3
c-4
c-5
c-6
20864616A01
8Kl31769
20K54rol4
2tRI20L57
8Kl31769
aKL29455
20K544594
8X131769
c-8
c-9
8Kl31799
c-10
c-11
c-15
c-16
2LSr294AO
21s129480
2ISL2L22A
21S 131999
23K544697
23K544697
8r(131799
c-18
c-19
c-20
c-2L
c-22
21D40339453
64K56Le77
23K544707
23K544540
21S132103
c-24
c-25
c-26
8rr3 1769
c-t2
c-13
c-L4
c-r7
2L5I32525
c-2s
8Kl31769
20K544696
21S
c-27
I32r03
23C64722AOs
c-28
64K530L77
2O to I2O mmf trimmer
.005 mf
2O0V
2O to L2O mmf trimmer
6.8 mnf 5OOV FC
.005 nf 2O0V
.05 mf 2O0V
2O to L2O mmf trimmer
. OO5 nf 2OOV
.01 nf 1O0V mylar
.05 mf 50V (USE 21A74O8os)
.05 mf SoV (USE 21AZ4o8O5)
15O mmf 50OV N750
.005 nf 5O0V
6.4 mf 4OV lytic
6.4 mf 4OV lytlc
. 01 mf 10OV mylar
.002 nf 10OV
.03 mf l00V
PLATE, spark
125 nf IOV lytic
25.0 mf 3V lytlc
.Ol nf 50V
.005 mf 200V
. O05 mf 20OV
4O0 to 52O mnf trlmmer
.01 nf SOV
350-5O0-5O0 mf /8V 1ytic
6RL24668
6RL27542
R-30
T-1
T-2
T-3
T-4
248646L3AOt
248646L3AO2
25864610A04
25C64607A,o2
48K134602
48K134601
48R134635
v-2
v-3
v-4
48KI34600
v-5
v-6
48RL34654
48R134673
v-7
48R]-34647
COILS &
LsC64626AO2
15D64751A09
t3D64720AoL
14A543810
36K544747
36X54474a
36K544760
29S 10134AO2
29A64647AOL
|
5" PM
pilot (.254-6.3V)
sPEAI(m,
FUSE,Sanp:1AG
INST
cHoI{E,
CHOKE,
AtI ATION
RF
sition
- NOTE: All resistors are insulated conpo_
type unless otherwise specj_fied,
R-18
R-19
R-20
E-2L
R-22
e-23
R-24
R-25
R-26
R-27
R-28
I 6RL2t847
I 6RL2LA47
I 6\L275L3
I 6n119926
I OntZSOes
I 6R127633
,
6R"L29829
|
Ontoossn+s
I
6Et2922r
|
I
6R127516
AntZsZzt
22K 20% r/2w
150K TO% L/2W
33K LO% r/zw
82K LO% I/21{ (tn sone sets)
100K lO% L/2W (In some sets)
56r to% L/2w
47OO 20% L/2W
22O TO% L/2W
CONIR'OL, vol-tone-sw
a2K ro% L/2w
22OO LO% L/2W
68K Lo% L/zW
PART OF R-8
22K LO% I/zW
10 LO% r/2W
10 Lo% r/zw FC
CONTROL, bias
15O LO% L/zW
47OO LO% t/zw
47OO LO% L/2W
29A64647AO2
rv544036
ESCUTCHEON,
KNOB, pendant
KNOB, tone
KNOB, vot & tuning
LUG, tern: spkr
I,UG, tern: ("A" lead)
NUT: push-on (dla1 scale)
PALNUT: (control mtg)
dlat
POINTER,
RECEPTACLE,
RECEPTACLE,
SCALE, dial
SCREW,
ant
fuse (USE 9K534968)
trans mtg
pi1 It
trans.
SOCKET,
SOCKET,
ORTES
BRKT, rcvr mtg
CAP, ignition
CAPACITOR,
coj-l
generator
LUG, term: (ignition
coil cap)
noise
IBIII{PLATE: incl tubing
1V40800A77
76C40647Ao2
76C40647AO4
35
127896
47C4064aAO7
*41840560A01
77D40632AO3
4K72La2L
RS-4
&
RS-Z REAR
314533215
29A762A0
29X762a2
ITEM,
bottom (USE l5D64ZbIAOb)
dial
INSULATOR, transistor
COVER,
TUNER PARTS
1v543186
251376
35L2A262
50c533088
22K 20% L/2W
330K 20% L/zw
82 Lo% r/zw
100 ro% L/2,n
IO0 LO% T/2W
COVER, back
SUPPRESSOR,
w544037
13C543043
1V530175
27OO rO% L/zW
2700 Lo% r/4w
47O toq. t/2w
cLIP, IF
KIT
NUT, 3/8-32 (radio mtg)
6A4t4t
I
dlal ret
tuner shaft
MTG PARTS
251376
COIL &
MTG PLAI1E ASSEM: i.nct L-2,
L-3,L-4,L-5 & mtg plate
CORE, iron (oscillator)
CORE, lron (RF & ant)
SCREW, tapplngi#4-4O x 1,24 (colls
ntg)
SHAFT, manual tuning
SPRING, ret. (nanuat shaft)
TUNB, MT-425: complete
wAsImR, "C" (manual shaft)
SEAT SPEAKER KIT
18B543088
15OO LO% l/2W
sP891 (USE 48R134646)
PARTS A ACCESS
74543Aa9
8B544383
88538244
fitter
RESISIORS
R-l | 6RL29a29
R-2 | 6RI25532
R-3 I 6RL27632
R-4 I 6Rt25I79
6R125534
R-5 I 6R127005
R-6 I 6R131667
R-7 I 6RL2709e
R-8,12 I tsco+zs+eoa
R-9 | 6F']25L79
R-10 I 6R129875
R-Il
| 6Rt245O7
R-tz I
R-l3 I onrzssoa
R-r4 | 6Rt24668
R-15 | 6K543800
R-16 I 18C64735A08
R-17 | 6RL24797
u54
M54 (USE 488134665)
BRACKET,
2570A7
CEOtrE
L-r
l rn"unrrroo=
L-6 zsas+aeea
2SA72 (USE 48K134601)
BUSHING,
428733793
DroDE, 1N139
LAMP,
2SA72 (USE 48K1346O1)
25A72
SM2I7
43464749Al-O
94472T4a
9K544723
34864524AOr
3K560695
9K543387
98542339
65Rt22345
OUTPUT
7K544769
E-1
E-2
E-3
E-4
E-5
65R1O867
Xc
Kc
DRIVER (USE 25864610403)
AAECHANICAT PARTS
MISCELLANEOUS ELEC1SICAL PARTS
DIODE, 1N139
lst IF: 262.5
2nd IF: 262.5
TRANS STORS
v-1
PLATE, SpaTK
48C134587
50c543225
10 LO% L/2W
47 LO% L/2W
lBANSFORMERS
2S7051
52A6474aAOL
4AC134587
ipt ion
CONTROL,
fader: 15Q
GRILLE, spkr
2O7o LW
Wyl
control
LUG, ground: l-ncI lead
NU-I, hex: 3/8-32 (control mtg)
SC!EIf, mach: 8-32 x 1" (spkr mtC)
SPEAIGR, PM: 6 x 9; 3.2e VC (RS:z
ONLY)
SIEIP, terminal
TERMINAL, pin: black (spkr conn)
TERi,IINAL, pln: whlte (spkr conn)
KNOB,