RCA VICTOR 15E Mounting instructions

• RCA VICTOR
Record Demonstrator
MO,DEL 15E
Chassis No. RS-139A,
Record Changer RP-190A-l
and Two Speed Manual Turntable
SERVICE DATA
-1951 No.7-
PREPAREDBY RCA SERVICE CO., INC.
FOR
RADIO CORPORATIONOF AMERICA
RCA VICTOR DIVISION
CAMDEN, N. J., U. S. A.
Specifications
Tube Complement
1. RCA 6SQ7 A.F. Amplifier
2. RCA 6SQ7 . Ph. Inverter
3. RCA 6V6GT Output
4. RCA6V6GT Output
5. RCA 5Y3GT . Rectifier
Power Supply Rating
115 volts, 60 cycles . 80 watts
Power Output
Undistorted 10 watts Maximum II watts
Loudspeaker
Size and type 12 inch P.M.
Voice coil impedance 3.2 ohms @ 400 cycles
Pilot Lamp Mazda #·51. 6-8 volts, .2 amp.
Weight 43 Ibs. net
Cabinet Dimensions (overall)
Height .... 17%" Width .... 211/2' Depth .... 19%"
Record Players
Automatic (RP-190A-l)
Record capacity up to 14 records
Type of records RCA "45"
Pickup (Stock No. 75770) crystal
Turntable speed 45 t.p.m.
Manual
Record capacity 1 record
Type of records up to 12 inch diameter
Pickup (Stock No. 75475) dual stylus crystal
Turntable speed 331f3 or 78 r.p.m.
RP-190A-I Record Changer:
The record changer will play up to fourteen 45 r.p.m.
records having a I1f2 inch center hole. It is identical to RP-
190-2a record changer except for the omission of the power
switch,
FOR RECORD CHANGER SERVICE DATA-
REFER TO RP-190 SERIES SERVICE DATA.
Manual Turntable:
The manual turntable will play one 331f3 or 78 r.p.m,
record up to twelve inches in diameter. The speed is con-
trolled by a knob on the motorbocrd. The correct stylus is
selected by a lever knob on the end of the picklW arm.
VOLUME CONTROL STOP
This instrument is provided with a volume control stop
to provide a pre-determined "maximum" volume level and
yet allow normal volume control operation up to the pre-
determined "maximum."
Adjusting "Maximum" Volume Level:
With the instrument operating, remove the volume con-
trol knob. Note the extending ends of two coil springs (one
light and one heavy) on the volume control shaft.
TO INCREASE
Turn control fully clockwise and then. with end of a
pencil or similar item, press counterclockwise on the end of
the LIGHT spring. Rotate control shaft clockwise until de-
sired level is reached. Release pressure on the spring and
replace knob.
TO DECREASE
Turn control fully -clockwise and then. with the end of a
pencil or similar item, press clockwise on the end of the
HEAVY spring. Rotate control counterclockwise to a very
low level. Increase volume to desired level as described
above.
Second Edition - First Printing 12·3·51
Trademark. ~, ~ "ReA Victor" and "VoltOhmyst," Reg. U. S. Pat. Oil.
Printed in U. S. A.

lS
IDLER TENSION
SPRING #76745
GROMMET
#76751
~~
MOUNTING
PLATE
CONNECTOR
&==~
Manual Motorboard - Motor Assembly
ADJUST LINK BY THIS SCREW "8 x 1/4 S.T. SCREW
TO PROVIDE APPROX. 1164"HOlD
WHEN SWITCH AND SPEED LEVER
OSONNOMONAL.".POSOT"~\
• WHEN SWITCH IS IN NOMINAL
POSITION AT EITHER '78'OR '33"
LOCATION,SWITCHLEVER SHOULD
BE APPROX. 1/32" MAX. FROM
STOP LANCES.
TIGHTEN CLAMP SCREWS SECURELY
SWITCH SHOWN IN "33 POSITION
Speed Control Lever Assembly
LF. TONE H.F. TONE
CONTROL RIO CONTROL R9
& POWER
SWITCH S I
TI
POWER
TRANS-
V
V3 6SQ7
6V6GT PltINl/.
OUTPUT
AUDIO INPUT
JI
Chassis Top View
Pickup Arm Mounting - Manual Motorboard
GROMMETS
#76751
SPRING
*76744
SPRING
#76745
SLEEVE
#76749
SPEED SHIFT
LEVER
I
33"3
PULLEY
#76748
MOUNTING PLATE
AND PULLEY ASSBY.
#76768
7S
U
PULLEY
*76746
LEAST FULL
HIGHS
TREBLE TONEVOLUME
.. -,"
Controls
•
MANUAL MOTORBOARD SERVICE mNTS
(a) Stylus force of pickup arm should be 8 to
10 grams. Insufficient force resulting from
use of incorrect spring or pickup may al-
low stylus to jump grooves. Excessive
force may cause distortion and record
wear.
(b) Pickup arm pivots should be adjusted to
provide a minimum of side play - yet al-
lowing free vertical movement. Binding
may cause stylus to jump groove.
(c) Inner surface 01 turntable rim must be
dean and smooth. Idler wheel and drive
pulleys must have no rough spots and be
free of oil and grease. Roughness may
cause rumble - oil may cause wow.
(d) Lubricate idler wheel and drive pulleys
with. a good quality light oil - one or two
drops for each is sufficient.
(e) The pickup arm pivot shaft may be lubri-
cated with a film of light oil. The pivot post
rubber mounting should not be excessively
compressed. The bearing nut should be
tightened only enough to elevate the pivot
shaft 1/32" above the post with the steel
ball in place. This ball must be in place to
permit free lateral piekup arm movement.
CRITICAL LEAD DRESS
1. Dress all filament leads next to chassis.
2. Dress power cord lead, from strain relief
grommet to on-off switch, along side apron.
3. Dress A.C. leads at ON-OFF switch away
from all audio components.
4. Dress output tube plate leads next to
chassis.
5. Dress CB next to chassis and wire with as
short leads as practical.
6. Dress lead from arm of low frequency tone
control to grid of V-3 away from A.C. leads
at ON-OFF switch.

MODIFICATION
Although designed and assembled for 3-speed operation,
provision is made for modification of this instrument for
33 and 45 rpm performance only. To eliminate the use of
the 78 SPEED control and 78 stylus, proceed as follows:
To alter SPEED SELECTOR control
Tie both pickup arms to their rests and place the instru-
ment on its left side (not on control knobs) on a table.
Through the opening in the bottom of the cabinet, discon-
nect the black power plug and the phono plug from its
chassis connection. While supporting the top panel, remove
the hex head screw and washer, centrally located beneath
the top panel at the back of the cabinet.
Place cabinet upright, move SPEED SELECTOR to 45
position, then lift off top panel assembly.
From the back, the switch can be viewed from beneath
ihe top panel and conversion effected as shown below.
Bend the 33 stop to the vertical position of the adjacent 78
stop. The speed change lever (on left) should now halt
against the vertical 33 stop, eliminating the 78 speed
position.
LEVER
78" STOP
LANCE
33" STOP.
LANCE
SHOWN IN
MODIFIED
POSITION
(VERTICAL) SPEED SELECTOR
SWITCH
15E
Replace top panel (rubber supporting grommets must be
in place) and the hex head screw and washer.
NOTE: It is important that screw be tightened until top
panel can be lifted approximately 1/16 inch only. The·
board should float freely on its mounts; there must be no
restriction 0/ movement.
Reconnect the black power plug and insert phone plug
in the chassis socket. Place the instrument in the upright
position and untie pickup arms.
To adapt STYLUS CONTROL LEVER-
With lever in 33 position, loosen left holding screw just
enough to turn lug to the position shown below and tighten
screw. This will prevent the 78 stylus from being turned
Ior use.
STYLUS CONTROL
LEVER
LUG
__-1II---4'lH-PICKUP
MOUNTING
SCREW
Before Operation-
Remove SPEED SELECTOR knob and turn civer the
CIRCULAR PLATE which will now show only 33 OfT 45
positions. Replace knob on shaft.
Reverse the left INSTRUCTIONS PLATE to read for 33
operation only.
J I
PHONO
C2
.01
C4
.oaz
RI
15K
R2
271<
R3
1.5MEG.
VOL.
CaNT.
SWITCH
pos. : .tI£ £ .
1-- 78 PHONO
2.--33. sPHONO
3--0FF
4.--45 PHONO
(RP'1901
MUTING
SWITCH
~--<r- 5102 '01'1" IN pas. 1 ~ 2.
5103 "ON" IN pas. 4-
BLK.
WHITE
RIO
2MEG.
L.F.TONE
CONT.
RIa
470K
R7
270K
.0033 ~ .~~
R9
IMEG.
H.F.TONE
CONT.
Rll
270K
C8
.01
C
560
RS
lOMEG.
CATHODE CURRENTS
V1 .7 MA
V2 .7 II
V3 33 ••
V'\ 33 ••
V5 68 ••
+".
CIB
30MFI
RS
vs 6800
SY3GT
RECT.
PI04-
335V.
+ •
I
CIA
'::'20MF'
FRONT /I REAR SECTION OF SWITCH
5101-' ARE VIEWED FROM FRONT
WITH THE CONTROL SHAFT IN
EXTREME C/CLOCKWISE POSITION 1.
1ISV.
<OO~
PWR. SUPPLY
IU6
.47..t \..
~
RN' TO ~~AT~S
eRN.- 8LK. R17 4 JEWEL LIGHT
-: .47.n...
K=1000
ALL RESISTANCE VALUE.S IN OHMS. ALL CAPACITANCE
~tL~tSF. 'e.~~ipTTH~~Js~ ~~~ICI. :'TE.~~·' ANa ABOVE 1.0 ARE
VOLTAGE.S MEASURED TO COMMON WIRING WITH CHANALYST OR
~g~TE~~r~: ~ S~pDpL;'~OULD HOLD WITHIN ± 2.0 ~ WITH RATED
Schematic Diagram

lS Heplcrcement
Parts
STOCK
No. DESCRIPTION
STOCK
No. DESCRIPTION
76731
TWO SPEED MANUAL TURNTABLE
Pickup Arm Assembly
Arm-Pickup arm shell-less cartridge, mount, and
cable
Bracket-Pickup arm mounting bracket complete with
pivot pin and counterbalance spring
Cable-3 wire pickup arm cable complete with con-
nectors
Knob-Stylus selector knob complete with screw
Mount-Pickup mount and swivel assembly
Nut-#00-1I2 nut and washer to mount stylus
Plckup-s-Ducl stylus pickup crystal cartridge complete
with two stylus
Pin-Pivot pin for counterbalance spring
Pivot-Pickup arm pivot (2 req'd)
Post-Pickup arm pivot post and stop pin
Ring-Retaining ring for pickup arm mounting bracket
Screw-#4 x 'I.' self tapping screw for pickup mount
and swivel (4 req'd) •
Spring-Counterbalance spring
Stylus-Osmium tip stylus for 78 RPM (not coded)
Stylus-Osmium tip stylus for 33
1
13 RPM (coded red)
523127
523268
503282
503315
.503327
503427
503447
504610
31364
54414
71979
76695
75566
503318
503356
503515
76694
76684
72437
74850
75643
30868
30870
76693.
75023
76296
76389
72856
74979
72118
11765
76692
76691
76688
73634
76689
76686
14270
30900
76690
/(6687
Heslstor-s-Wire wound, 0.47 ohms, I watt .. R16, RI7
Resistors-Fixed, composition:-
270 ohms, ±lo%, 2 watts................... .R15
6800 ohms, ± 10%, 2 walts. . . . . . . . . .R5
8200 ohms, ±Io%, IIz watt................ .R13
15,000 ohms. ±lo%, 1/2 watt Rl
27,000 ohms, ±lo%, IIz watt .R2
270,000 ohms, ± 10%, IIz wati . R6, R7, Rll
470,000 ohms, ±IO%, 1/2 walt RI2,RI4
10 megohm, ±2o%, 1f2 walt . .. R4, R8
Socket-pilot lamp socket
Socket-Tube socket
Stop-s-Volume control adjustable stop (two springs)
Transformer-Output transformer .T2
Transformer-Power transformer, n 7 volt 60 cycle .. TI
FUNCTION SWITCH ASSEMBLY
Cable-Shielded audio cable complete with pin plug
(switch to amplifier) PI03
Capacitor-Ceramic, 1800 mml. CI02
Capacitor-Tubular, paper, .001 mf., 1000 volts .. CI01
Connector-Two contact female connector for motor
cables PIoIA, PI02A
Connector-Two contact male connector for motor
power cable PI04
Lever-Speed change lever (mounted on switch shalt)
Resistors-Fixed composition:
18,000 ohms, ±Io%, lfz watt RI03
56,000 ohms, ±10%, lfz walt RIOI
1.5 megohm, ± 10%, 'fz walt . .. .'RI02, RI04
Switch-Function switch-less speed change
lever . . . . . . . SIOI, S102, SI03
SPEAKER ASSEMBLIES
971494-2W
RL11IBI
RMA274
Cap-e-Dust cap
Cone-Cone and voice coil (3.2 ohms)
Speaker-12" P.M. speaker complete with cone and
voice coil (3.2 ohms)
NOTE:-II stamping on speaker instrument does no
agree with above speaker number, order replace-
ment parts by referring to model number stamped
on speaker and full description of part required.
MISCELLANEOUS
Baffle-Baffle board and grille cloth
Ball-Steel ball ('/." dlo.) : for pickup arm mounting
Bracket-Pilot lamp bracket
Cop-e-Pilot lamp cap.
Foot-Rubber foot (4 req'd)
Grommet-Rubber' grommet for mounting 45 RPM
changer (3 req'd)
Grommet-Rubber grommet for motor board (4 req'd)
Knob-Selector switch knob-tan
Knob-Tone control or volume control knob-brown
Lamp-e-Pilot Icmp-c-Mczdo 51
Link-Motor speed change link (bent-end section only)
Link-Motor speed change link (slotted section only)
Nut-Pickup arm pivot shaft bearing nut
Nut-Speed nut for speaker mounting screws (4 req'd)
Rest-Pickup arm rest (for 33'13-78 RPM arm)
Sleeve-Rubber sleeve (39/640.0. x 7/16" 1.0. x
11/32") for pickup arm pivot post
Spring-Retaining spring for knob 74057
Spring-Retaining spring lor knob 72118
Spring-Speed change link and lever tension spring
Washer-Rubber washer (13/16" 0.0. x 7/16" 1.0. x
If. ) for pickup arm pivot pbst (2 req'd)
76734
76737
76738
76732
74230
75475
75366
75357
76733
7~736
71097
76735
75497
75496
30870
76751
76753
Motor and Turntable Assembly
Connector-2 contact male connector for motor leads
Grommet-Rubber grommet to mount motor (3 req'd)
Motor-117 volt 60 cycle motor complete with mount-
ing plate-less #76768 plate and idler wheel
Plate-Speed control pulley mounting plate complete
with pulleys
Pulley-78 RPM pulley
Pulley-33'/3 RPM pulley
Sleeve-Spring sleeve for motor shaft
Spring-Detent spring (below motor mounting plate)
Spring-Hairpin spring to retain idler wheel
Sprinq-c-Idler wheel tension spring (above motor
mounting plate)
Turntable-Finished turntable (9" dia.J
Washer-Flat fibre washer for idler wheel
Washer-"C" washer to retain turnable on shaft
Wheel-Idler wheel
45 R.P.M. AUTOMATIC RECORD CHANGER
RP 190A-l
Same as listed for RP 190-2a in RP 190 Series Service
Data except for the omission of the on-off switch
and switch housing
AMPLIFIER ASSEMBLIES
RSI39A
Capacitor-Ceramic, 560 mml. C7
Capacitor-Electrolytic comprising 1 section of 20 mfd.,
450 volts, I section of 30 mld., 350 volts and I sec-
tion of 20 mfd., 25 volts CIA, CIB, ClC
Capacitor-Tubular, paper, oil impregnated, .0012
mfd., 1000 volts CIO, Cll
Capacitor-Tubular, paper, .0033 mfd., 600 volts .. C5
Capacitor-Tubular, paper, .01 mfd., 400
volts . C2, C6, C8
Capacitor-Tubular, paper, .015 mfd., 600 volts '" C3
Capacitor-Tubular, paper, .022 mfd., 400 volts C4, C9
Connector-Phono input connector (socket) Jl
Connector-Single contact male connector for speaker
leads (2 req'd)
Connector-2 contact female connector for motor
power . Pl
Control"':"'H.F. tone control .... . R9
Control-L.F. tone control and power switch .. RIo, SI
Control-Volume control-less stop ... : .. R3
Grommet-Power cord e••«rin relief (I set)
X3240
.10941
71599
13103
72113
75697
APPLY TO YOUR RCA DISTRIBUTOR FOR PRICES OF REPLACEMENT PARTS
76768
76746
76748
76749
76755
76744
76745
76752
76743
35969
76750
76685
71976
73850
73795
73561
73797
73562
35787
72776
30868
38405
38402
71980
74838