VOLUME R-22, MOST -OFTEN -NEEDED 1962 RADIO SERVICING INFORMATION

MOTOROLA Chassis HS -943, HS -952, Models SP26 and SK65 LEFT CHANNEL
SPKR SPEAKER
4,tb t& I 49 VIA V2 PLUG MUSING
1/2 12AX7A 35C5 DOT

POWER AMP
A
VOLTAGE MAP El
TI
BLUE z
2
1

T1 & T3 CONN
1

12 CONN
2
76) :-.7.m..Nr2OK a
a 1
(TOP VIEW) (TOP VIEW)
R3A esv a
1
CIOR70-2 (gT /Run SPKR
13. C161. LOUD
NESS C4
(SP26)
.00 2 106V
.1 a0 c, loo v-- JACK
0 220 2-5
-.5V 6 2
600K ON (s.65).01 TRACER
:=25
TAP 2M
RA 2
I -II qm
LEFT P- 5
C2
vz R8 1M
12
CHANNEL R10A 27.5K
.002 err BASS CHANNEL
INPUT TONE TAP
TRACER SPEAKER
ni IM 2 PHASING

\J"4=1 eEn 2
z

elOB
TONE
27.5K
RIGHT TAP
C3
CHANNEL 1M
.002
INPUT R9 1M
WI I8 R3B cc
22V 8 T3
SPKR
600 Loud(SP26) 8 JACK
7 2-5 a
C5 1 005 2
C18 -.5V 1
a
6V
2201 CSTCONT I .01
(SK65)
CP.,
CC a 1R18
C111 (A 100
6 68V a
I
PHONO MOTOR
-1
__,S131100 2 120K
R1NW' a WET
TRACER
BLUE
V4
RECORD SPKR
ON-OFF- 35W4 V1B V3
CHANGER PLUG PHASING
REJ RECT 1/2 12AX7A 35C5
WIRING DOT
VOLTAGE AMP POWER AMP
RECEPT 5 E3

0
LUG z
110V
VIEW 11
47 RIGHT CHANNEL
C14 .01
7 usv R
ti
R
PLUG SPEAKER
NET PIN VIEW
4 A 3 V3 V2 VI -C17C
C17A C17B
120V 60%
20VAC 90V AC 5IV AC 4.1V AC
I50MF 50 MF ;50MF SPEAKER WIRING
3 4 3 4 3 4 FOR SK65 ONLY
AC ONLY . 1
rLEFTCHANNEL SPEAKER
NOTES: WIT PHASING
HS -943 & 952 SCHEMATIC -MODELS SP26 & SH65 CAPACITORS Unless otherwise specified, T1 2 TRACER DOT
decimal values In MF, all others In MMF. El
ST2
MOTOROLA Chassis HS -942, Model SP25 VOLTAGES -Measured from point Indicated
to B- with a VTVM. ± 10%. No signal In.
VI
50EH5 Record'
PWR AMP
LUE PHASING
DOT .;17= B- .L.Chassis aln. changer T3 1 TITER P H4AI NG
NIT frame
LEFT CHAN
El
R3 33K 6 ant
2-5
10 )61 8E3
2
LEFT CHANNEL
SPEAKER
RIGHT CHANNEL SPEAKER
L
1 _CLAM RALot (EASTER)

STEREO +
0
CARTRIDGE
- 05 39
12
PHASING
T1 R2 R1
VOLUME
R6
TONE
LEFT CHAN VOLUME
NET OUTPUT TRANS LEFT CHAN RIGHT CHAN
12
-C4 R9 R10 R IGHT CHAN
Cl R3 R4
OUTPUT TRANS
BLA

RECORD CHANGER WIRING BLUE

V2 k IGHT CHANNEL
PHONO
1 SPEAKER
50EH5 (REMOTE)
MOTOR PWR AMP
ON- RIGHT CHAN
OFF-REl
II5V AC
BLS
V3 100v
35W4
RECEPT
L_Luc VIEW RECT
E3
115V R7 39 R8 820
ir AMP

E3 T
PLUG
PIN VIES 1 " 7
9i:i-C4B

120V 60%
AC ONLY
LIU V2
3^4
VI SOME
+C4C
5o,, T.. +C4D R8 125 C2 C3 R7

gay AC 47VAC

NOTES:
CAPACITORS - UNLESS OTHERWISE SPECIFIED, VOLTAGES - MEASURED FROM POINT INDICATED
DECIMAL VALUES IN NI, ALL OTHERS IN MMF. TO B- WITH A VTVM. f 10% NO SIGNAL INPUT.
CHASSIS GROUND = RC GROUND

HS -942 SCHEMATIC -MODEL SP25 HS -942 PARTS LOCATION

67