Motorola VWA63 User manual

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
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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.

STEP GENERATOR CONNECTION GEN FREQ
(400 cycle 30% mod) TUNER SET TO AD.TUST REMARKS
IF ALI(
I.
RF AL]
2.
]NMENT
To collector of
RF arnp thru
. 1mf & chas sis
GNMENT
Ant recept thru
dummy (see
figure )
262.5
1610 Kc
Hi end stop
Hi end stop
1,2,3
&4
5, b, /
&8
Adjust for rnaxirnum
Adjust for maximum
ALIGNMENT
Connect an output rneter across the speaker voice coil. Set volume to rnaximum
uatesignalgeneratoroutputto maintain I watt (1.79 volts across 3,2 ohm load) on and tone to treble. Atten-
output meter at all times.
NOTE: Do not perforrn Steps 3,
nents have been replaced.
socket to expose the core
possible out of the coils to
Ant recept thru
durnmy (see
figure)
tt
4, 5 & 5 unless the tuner has b'een tampered with or associated comPo-
If necessary, Temove the escutcheon, dial background and the pilot light
screws. Before proceeding with Step 3, back the tuning cores as far as
elirninate their effect on trimmer adjustments.
3.
6. 5 until no further increase; Step 5
Weak station
around 1400 Kc
Adjust for maximum
Adjust for rnaximum
Adjust for maximurn
Iast step. Then, cernent core
Adjust for rnaximum with
radio installed in car and
antenna fully extended.
NOTES}
ALIGNIIENT IOCATION DETAIL
16t 0 Kc
1200 Kc
1610 Kc
Hi end stop
Tuner carriage
.285'r f rorn Hi
end stop
Hi end stop
s, 6,7
&8
9,10, r1
& l2
5, b, /
&8
should be
Repeat Steps 4 and
screws in place.
ANTENNA
7.
PLUG TO FIT RECEIVER
ANT-ENNA RECEPTACLE
TO REOEIVER
}ANTENNA
RECEPTACLE
L__.___l OAN
ATTACH€D
TO PLUG
TO SIGNAL
GENERATOR
DI'UXY ANTETNA DETAIL

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c13 R8
.E&
,Arr ;
LEAD S
L5
RI *
VI
25A7?
RF AMP
R30
c28
c27
C8'{:
I2
TI
R20
25472
MIXER
S PKR
%\
LEAD S
R2I
c23
c22
Rlt
Rt3
R28
Rl6
R29 R18
R9.r RR27
V5
MN53
AUDIO
R26
R31
E1
c10
25A72
IF AM
c18
RIO R4
V7 SP89I OR
SP485 PWR AMP
c9 RI7 Ci C5 C24 R22 V3 SM-217
20 R6 R23 R5 R3 Cl4 R2l Ci6
PARTS LoCATTON
c17
c2
EPT
ANT
i,SPKR
ilrnos
iJ
g- r'l
R
V6 MN53
DRIVER
E2/ R24

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REPTACEMENT PARTS LIST
NOTE: When ordering parts, specify model number of set j-n addition to part
Ref, Part
No, Number
number and description of part.
Descr ipt ion
Ref. Part
No. Number
CAPACITORS
Descr ipt ion
ELECTRICAL PARTS
NOTE: A11 capacitors are ceramic disc
type unless otherwise specified.
R-29 6S125C25 1O0 LO% j./2W
R-30 6SL25C2L 68 LO70 t/2W
R-31 65r2sDlo 330,00O rO% r/2U
TRANSFORMERS
c-1 2085440L7
c-2 8R10064434
c-3 20K541014
c-4 2lR120r-59
c-5 2rRt28634
c-6 20K541-014
c-7 8KL29455
c-8 8Kl-31769
c-9 2rKr3L254
c-10 2tKr3t254
c-11 2rRL2l228
c-r2 2IRL2287|
c-r3 23K544697
c-14 23K544697
c-15 21Kr32103
c-16 2rKL32525
c-r7 2tD40339453
c-18 21Kr32l-03
c-19 64K530L77
c-20 23K544540
E-l
E-2
E-3
E-4
E-5
40 nmf to 430 mmf trimer
.003 mf 200V mylar(USE 8R10110A02)
20 mf to l2O mmf trimmer
8.2 nmf 500V f.c.
.005 mf 500V
20 mf to 120 mf trimmer
.05 mf 2O0V mylar
.005 nf 200V mylar
,05 mf l00V (USE 21A740805)
.05 nf 100v (USE 21A740805)
150 mmf soov N750 (USE 21R124608)
,0o5 mf 500V (USE 2LRL2a634)
6.4 nf 40V electrolytic (aIso
replaces 5 mf used in sone sets)
6"4 mf 40V electrolytic (also
replaces 5 mf used in some sets)
.01 mf 1O0V
.002 mf I00V
,03 mf 10OV
.01 nf l00V
SPARK PLA'IE
25 nf 3V electrolytic (USE -
24B646L3AQI lST IF: 262.'KC
248646L3AO2 zND IF: 262,5KC
25B646LOAO2 DRTVER (USE 258646rOA03)
25C64607A0I OUTpUT (USE 25C64607A02)
T-I
T-2
T-4
23C4007rA05 )
C-21 81131799 .0I mf 1O0V mylar
C-22 8Kr31799 .Ol mf lO0V mylar
C-23 8K131799 ,0l nf 100V mylar
C-24 21R410036 1.00 mnf 50OV N75O
C^25 20K54f700 310 nnf to 39O mf trimer
C-26 21K132103 .01 mf IOOV
C-27 23C64722AO2 l-00-500-500 mf/1^6Y electrolytic
C-28 *23K54471A 500 nf 8V electroLytic
C.29 64K53OI77 SPARK PLATE
MISCELLANEOUS ELECTRICAL PARTS
2SA72 (RF amp - USE 48K134601)
2SA72 (mixer)
SM2l7 (oscillator)
2SA72 (IF anp - USE 48K134601)
MN53 (audio anp)
Ii,lN53 ( dr iver )
SP891 (pwr - also replaces SP485)
MECHANICAL PARTS
*7K5447L2 BACKGROUND, dial scale
428733793 CLIP, IF mtg
#I5K5447L5 COVER, back (rreat sink)
#15K543815 COVER, bottom
13C543880 ESCUTCHEoN, dial
14A5438f0 INSULATOR, power translstor ntg
36K544747 KNOB, dummy
36K344748 KNOB, tone
36K544760 KNOB, vol & tuning
29A64647AOL LUG. termj-na1 ("tr!' lead)
I3K544668 MASK, dial scale
257051 PALNUT: 3/8-32x9/L6 (vol control mtg)
94472L48 RECEPTACLE. antenna
9K544713 RECEPTACLE, fuse
*34864793402 SCALE, dial
3K560695 SCREW, tappine', i6xI/2 (pwr tran-
sistor ntg)
9A543879 SOCKET, pilot light
98542339 SOCKET, transistor (pw;' amp)
2s7o87 SPEED NUT (dial scal,e ret)
29A762aO TERUINAL, pln: black (spkr leads)
29K762a2 TERMINAL, pin: white (spkr leads)
INSTALLATION PARTS & ACCESSORIES
74543889 BnACKET , radi.o mtg
a8538244 CAPACITOR, noise suppression (gen-
erator )
88544383 CAPACITOR, noise suppression (ig-
ni-tion coil)
#LV544O36 KIT, radio installation
29A64647A01 LUG, termj,nal (ignition coil
capac itor )
25r376 NUT. hex: 3/8-32xL/2x3/32 {r^d,ao
TA,ANSISTORS
v-l 4aKr34602
v-2 48K134601
v-3 48Rr34635
v-4 48Kr34600
v-5 484124318
v-6 4aRr3464r
v-7 48R134646
48K644681 DIODE, lN60 (det)
48K644681 DrODE- rN60 (AGC)
5OC5a"3225 SPEAKER, PM: 5"; 3.2O VC (USE
50c5627Qi7)
65R1O867 BULB, pilot lie;ht: #44 (6.3V)
65RI22345 FUSE, 5 amp: 1 ag
COILS & CHOKES
L-T,2.3 ,4 - SEE TIJNER PARTS
L-5 25B5+3338 CHOKE. filter
L-6 248647A5403 CHOKE, R!'
CONTROLS
R-8 &12 18C647344O3 VOLIJIIE, TONE & SI{: volloK,tone I00K
R-16 18c64735A08 BIAS: 3oo 20% 2\l
RESISTORS - NOTE: Al1 resistors are insulated compo- front ntg)
sition type unless other specified. 6L4l4L SUpmESSOR, distributor
R-l 6S125C81 22,OOO LO% L/zY 1V6496tA22 TRIMPLATEI j-ncls tubins
R-2 65 l25Do2 150 , 0o0 rOf3 V2fr
R-3 6sr25c85 33,ooo ro% r/zur TUNER PARTS
R-4 6s125C95 82.ooo lo% L/2tt {in some sets)
6S125C97 lOO , OOO r0% l/2Y ( in some sets) 43K47L633 BEARING. ball
R-5 6Sr25C91 56,000 l.oio I/2Y 1V564641 CLUTCH & DISC ASSEU| incl set screw
R-6 6S125C64 47OO 1O% l/2W L-1,2, *1V418O0A32 COILS & ltIG PLATE ASSEM: incl L-1.
R-7 6S125C33 22O LO% l/21{ 3,&4 L-2,L-3,L-4" I' mtg plate
R-8 - SEE CONTROLS 76K563288 CORE" iron (oscillator)
R-9 6S125C93 68,000 LO% Lizttt 76K5632A8 CORE, i.ron (RF and ant)
R-10 6Sr25C49 1O0O LOI. r/2W 18563899 GEAn BUSHING & DISC ASSEM:
R-11 6Sr25C83 27,OOO lO% L/2V 58562438 GROIIIdET, core mtg
B-12 - SEB CONTROLS #45A4L254AOL LINK connecting
R-r3 6S125Dr8 680,000 rO% L/2v 1B4O875AO2 POINTER
R-14 6Sr25C0l 10 LO% l/2v 'i38K56521O PUSTIBUTI9N
R-I5 6K5438O0 l0 n% L/2I: fixed carbon NTC 49A5624aO ROLLER. clutch release
(UsE 6K540634) M62830 sCREw li NUT ASSEMBLY: adiustabl-e
R-16 - SEE CONTROLS 3A563128 SCREF, set:- 4-4Ox5/L6 (ctutch &
R-17 6s125C25 100 LO% l/2fr disc assem)
R-18 6sr25C64 47OO LO% L/2Y 35127896 SCBEW. tappine: 4-4oxl/4 (coits ntg)
R-19 6S125C64 47OO lO% L/zU 44B56375A SHAFT. manual tuning
R-20 6Sf25C53 l5O0 lofo l/2V 4LA562449 S4ING" anti rattle (clutch release
B-21- 6Sr25C57 22Oo ro% L/zv bar)
R-22 6SI25C59 27oo lO% L/zU 4LA562447 SmINc, ctutch l'elease
R-23 6SI25C4I 47O IO% l/zt 4LA4L255AO1 SPRING, connecting l-i,nk
R-24 6S1,25C81 22,OOO lo% L/zt 418562503 SmINc, pointer tension
R-25 6Sr25C75 12,000 IO% L/zfi *77K5652O9 TUNS1, AT430: complete
&-26 6S125C25 100 lO% L/2U.(in some sets) 4X501364 WASUER, "C', (manual shaft ret)
6s125C23 82 Lo% l/2v {in sone sets) 4K692I88 ilASHER, ,'C" (pointer ret)
R-27 6SI25C25 IO0 LO% L/2Y 4A56243L ilASI{ER, cup (clutch release spring)
R-28 6S125C64 47OO LO% L/2r 4K564253 WASIER, spring (nanual shaft)
* NEI{ ITEM. APMARS IN ANY LIST F-OR FIRST TITE
f LIMITED REPLACEUENT llElt" I'IIE VOLUIIiE OF RESLACEI'ENT ON TSESE IIEMS IS SMALL, TEEREFORE,
IT IS SUGCESTED TITAT ORDERING BE DONE ONLY AS REQUIRED.