Superscope A-245 Mounting instructions

——
SUPERSCOPE..
SOLID STATE
STEREO AMPLIFIER
Model A-245 (E)
SERVICE DATA
SUPERSCOPE INC.
8150 VINELAND AVENUE.
SUN VALLEY, CALIFORNIA -91352-U.S.A.
- A-245 (E)
TABLE OF CONTENTS
Technical Specifications
Alignment Procedure
Circuit Board Diagram
Schematic Diagram
Exploded Diagram of The Mechanism
Parts List
Voltage Conversion
TECHNICAL SPECIFICATIONS
<AMPLIFIER SECTION>
Instantaneous Peak Music Power...... 50W at 8 ohms
E.1.A. Music Power............... 35W at 8 ohms
Total Music Power (I.H.F).......... 30W at 8 ohms
Continuous Power (R.M.S).... . 10W + 10W at 8 ohms
Harmonic Distortion at 1KHz.. . Less than 0.5% to 10W
Power Bandwidth......... 30—30,000Hz at 8 ohms
at 1% THD (—1 dB)
Frequency Response........ 20—40,000 Hz (—3 dB)
Signal to Noise Ratio ...... AUX..70 dB, MAG. 60 dB
Damping Factor.............. .... 30 at 8 ohms
Bass Control ..............04.- +10 dB at 100 Hz
Treble Control.............. +10 dB at 10,000 Hz
Loudness Control.......... +8 dB at 100 Hz, +4 dB
at 10,000 Hz
Input Sensitivity. . . MAG. 2.5mV to 10W OUTPUT, CER
150mV to 10W OUTPUT, TUNER 100mV
to 10W OUTPUT, AUX. 100mV to 10W OUTPUT,
TAPE 200mV to 10W OUTPUT
<AUXILIARY CIRCUIT>
Tape Monitor Switch, Loudness Control Switch, Boost-
Cut Separate Bass and Treble Controls, Speaker System
Selector, Stereo Headphones Jack, Switched Auxiliary
AC Outlet.
<Solid State Devices>
EEANSIStONIS 22a se ee Ae Ge ee ee ee 18
Diodes....... eh cer eater ah taicth Stee ande eae dees aha rgedate 10
<Power Requirements>
AC 110, 120, 220, 240V 50/60 Hz
Power Consumption............. 60 W maximum
Power Voltage. ...
<Dimensions>
(te Lo ae em nea 14-11/32”
DEDtA! :asccs ich ben Sh Care DE eae, oS 7-1/8"
PUCVOIN ins 2b wise ite BS t hoe ar e 4-9/16"
WelOnts.2 6 2h disutecd deo Stee a Se ae eee 8 Ibs
* These specifications and exterior designs may be changed for improvement without notice.

A-245 (E)
ALIGNMENT PROCEDURE
1. Set the volume contro! at maximum, bass, treble 2. Connect 8 ohms dummy load resistors (10—20W,
and balance controls at mechanical center position, non-inductive preferably) to each R and L channel
speakers switch in the position “MAIN” while “MAIN” output terminals of the unit.
switching the tape monitor and loudness control
switches off.
(Selector Switch in the position ““AUX’’)
Signal Sou rce Indicator
Gradually increase output level of the audio generator
and adjust. R161 and R162 for symmetrical clipping
level.
A A=B
Audio Generator
to AUX terminal
Oscilloscope to
output terminals
Adjust R166 and R167 for not having any evidence of
crossover distortion at 500mW output.
Caution: Avoid excessive bias current (10mA at no signal).
CIRCUIT BOARD DIAGRAM (TOP VIEW)
Audio Amp. Block
2

SCHEMATIC DIAGRAM
H101, Hi02 HIO03,HIO4 H1I05 , HiO6 HIO7 , HIO8 HIO9 HHO Hitt, Hll2 HtI3,HI14 HII5~ H1Ii8 Hi19~ HI24 HI25~H!28
HT307321A HT307331D HT307331C HT303720A HT3O07341C HT307341B HTIOS611B HT402351B HVO000705 HD2000I110
(2SC732GR) (2SC 733 BL) (2SC7 33 GR) (28C372Y) (2SC734Y) (2SC7340) (2SA5610) (280235 0) (S-30I6R) (1S-1665 )
MAIN REMOTE
———— ee ee eS SS SS SS SS SS ee SPEAKERS SPEAKERS
2
N
ao
wl 9
=| we
3 a2
ROO! | og
39K soo! S; ea
ROO2 R205 C208 5,
39K 1K 022yF>
C204 2 |
47 yr oF
25V i
RO2I
220
RO2O
220
R207
C206
0022yF 2.7K
L__| s007
HEAD PHONES
SOO! PHONO SELECTOR
| MAG
2 CER
[o|yoro
MOOI yOO2
$002 FUNCTION 7
TI T
| TUNER CoUxA TRANSISTOR CONNECTION (BOTTOM VIEW)
2 PHONO
3 AUX
Ec B BCE
SO003~1! SP. SYSTEM SELECTOR
fl MAIN SPEAKERS
= 1S aera!
006
REMOTE SPEAKEPS HIOI~HIIG HIIS~ HII8
Pall
i
S003-2
TAPE
MON.
ee SE cs
O TAPE
AC 220V FUNCTION SWITCH POSITION
PHONO TUNER AUX TAPE
IN
$003-3 LOUDNESS
OFF
a ON
50~60Hz
S004 POWER
D1 OFF
ON
(3) Svz-v

EXPLODED
DIAGRAM
OF
THE
MECHANISM
0225 0225
HI17 HII8
0317 0213
0312
0320
Olt
0209
0112 9310 Z wy
0204
0212
(3) Svz-v

A
0101
0102
0105
0108
0117
0118
0210
0302
0104
0111
0112
0113
0114
0122
0132
0201
0202
0204
0205
0206
0207
0209
0221
0212
0211
0213
0214
0215
0216
0217
0218
0219
0222
0223
0224
0225
0226
0227
0228
0229
0232
0301
0303
0304
0305
0306
0307
0308
0309
0310
0311
0312
0313
0314
287706340
287706301
287706302
287625150
287715801
286025901
273125901
287616002
51040306A
287726502
287615407
287615409
287615402
287615406
287606450
51570308B
279210501
280416001
280416003
287610901
280410901
279200501
287716040
287716001
276325901
714002190
254910401
138200503
267326701
273105502
287605301
51570306B
54050300R
62031 650W
145525905
286412001
51380316P
268611801
274726503
51062608E
53112603E
287605302
257886101
51042608A
62031650W
51062605A
51062605A
51060305A
51060305A
51060305A
51060305A
51060305A
51060305A
51060308A
51060310A
54050300R
MECHANICAL PARTS
Escutcheon Ass’y
Escutcheon
Escutcheon
Badge K
Window
Bush x4
Bush
Bracket x2
F.H.M.Screw x4
Indicator
Knob (Power Switch)
Knob x3
Knob (Volume)
Knob x 4
Case K
P. TaptScrew x2
Chassis
Bracket (Front)
Bracket
Shield
Shield
Clamper
Bracket Ass’y
Bracket
Bush
Bush
Retainer x2
Clamper x2
Heat Sink
Collar x4
Cover
P. Tapt Screw
T.L. Washer OR
Lug
Bush
Insulator
P.H. Tapt Screw x 2
Spacer x4
Indicator
P.H.M. Screw
Hexagon Nut
Cover
CAUTION Label
F.H.M.Screw x2
Lug
P.H.M. Screw x3
P.H.M. Screw x2
P.H.M. Screw x2
P.H.M. Screw x2
P.H.M. Screw x3
P.H.M. Screw x3
P.H.M. Screw x2
P.H.M. Screw x6
P.H.M. Screw x4
P.H.M. Screw x2
T.L. Washer OR
PARTS LIST
Es PART NO. DESCRIPTION
0315
0316
0317
0318
0319
0320
0321
0322
0323
0324
0325
0326
0327
0328
0329
0330
0331
0332
0333
0334
0335
P100
51100410A
51570310B
51570306B
51570306B
51570306B
51570306B
51570306B
51570306B
51570306B
51570315B
51380305P
53110303E
53112603E
53110303E
53110303E
54020301E
54052600R
54050300R
54050300R
54040302A
54080400R
Y D2863001
ZZ 2877801
RT1033214
RT1033214
RT 1068314
RT1068314
RT1010414
RT1010414
RT1010214
RT1010214
RT1022414
RT1022414
RT1068214
RT1068214
RT1012214
RT1012214
RT1022414
RT1022414
RT1015314
RT1015314
RT1027214
RT1030414
RT1030414
RT1039214
RT1039214
RT1015114
RT1015114
RT1015514
RT1015514
RT1082214
RT1082214
RT1010114
RT1010114
RT1027214
RT1010314
RT1010314
DESCRIPTION
B.H.M.Screw x4
. Tapt Screw
. TaptScrew x4
. Tapt Screw
. Tapt Screw x3
. TaptScrew x3
. Tapt Screw x4
. Tapt Screw
. TaptScrew x2
. Tapt Screw x2
vVvuvvUVYVVdV UV
P.H. Tapt Screw x 2
Hexagon Nut
Hexagon Nut
Hexagon Nut
Hexagon Nut
Flat Washer P
T.L. Washer OR x 2
T.L. Washer OR
T.L. Washer OR
Spring Washer x4
T.L. Washer RR x4
ELECTRICAL PARTS
P.W. Board
P.W. Board Ass’y
A-245 (E)
RESISTORS (Alli resistors are +10%,
YW and carbon type, unless
otherwise indicated. )
3.3KQ
3.3KQ
68KQ
68KQ2Q
100K2.
100KQ2
1KQ
1KQ
220KQ2
220KQ2
6.8KQ
6.8KQ
1.2KQ
1.2KQ
220K
220KQ2
15KQ
15KQ
2.7KQQ
300K2
300K
3.9KQ
3.9KQ
1502
1502
1.5M2Q
1.5MQ
8.2KQ
8.2K
1002
1002
2.7KQ
10KQ
10K2

A-245 (E)
REF.
REF.
DESIG,
|
PARTNO.
|
DESCRIPTION
Desig,
|
PARTNO.
DESCRIPTION
R137
RT1010414
100KQ
C127
EC
1080353
Elect.,
1000uF,
35V
R138
|
RT1010414
100K22
C128
|
EC1080353
Elect.
1000uF,
35V
R139
RT1012214
1.2KQ
C129
DF1747301
Mylar,
0.047uF
+20%
R140
RT1012214
1.2KQ
C130
DF1747301
Mylar,
0.047uF
+20%
R141
RT1027214
2.7/KQ
R142
RT1027214
2.7KQ
C131
EC3380401
Elect.,
3300uF,
40V
C132
DD1650001
Ceramic,
50pF
+10%
R143
RT0512314
12KQ
+5%,
YaW
C133
DD1650001
Ceramic,
50pF
+10%
R144
RT0512314
12K
+5%,
*AW
C134
EA1070109
Elect.,
100uF,
10V
R145
RC1022112
Solid,
2202
+10%,
AW
C135
EA1070109
Elect.,
100uF,
10V
R146
RC1022112
Solid,
2202
+10%,
AW
C136
DD1630001
Ceramic,
30pF
+10%
R147
RC1010012
Solid,
102
+10%,
*W
C137
DD1630001
Ceramic,
30pF
+10%
R148
RC1010012
Solid,
10Q
+10%,
AW
C138
EA3360259
Elect.,
33uF,
25V
R149
RC1022112
Solid,
2202
+10%,
AW
C139
EA3360259
Elect.,
33uF,
25V
R150
RC1022112
Solid,
2202
+10%,
A~W
R151
GW1050202
0.52
+10%,
2W
SEMICONDUCTORS
R152
GW1050202
0.52
+10%,
2W
H101
HT307321A
Transistor,
2SC
732
(GR)
H102
HT307321A
Transistor,
2SC732
(GR)
R153
GW1050202
0.522
+10%,
2W
H103
HT307331D
Transistor,
2SC733
(BL)
R154
GW1050202
0.52
+10%,
2W
H104
HT307331D
Transistor,
2SC
733
(BL)
R155
RC1033012
Solid,
332
+10%,
YW
H105
HT307331C
Transistor,
2SC
733
(GR)
R156
RC1033012
Solid,
332
+10%,
YW
H106
HT307331C
Transistor,
2SC
733
(GR)
R157
RT1010514
IMQ
H107
HT303720A
Transistor,
28C372
(Y)
R158
RT1010514
IMQ
H108
HT303720A
Transistor,
2SC372
(Y)
R159
RC1010012
Solid,
102
+10%,
YW
H109
HT307341C
Transistor,
2SC
734
(Y)
R160
RC1010012
Solid,
102
+10%,
YW
H110
HT307341C
Transistor,
2SC
734
(Y)
R161
RA0104006
Trimmer,
100KQ
|
R162
RA0104006
Trimmer,
100KQ
H111
HT307341B
Transistor,
2SC
734
(O)
H112
HT307341B
Transistor,
2SC
734
(O)
R163
RT1010114
100Q
H113
HT105611B
Transistor,
2SA561
(QO)
R164
RT1010114
1002
H114
HT105611B
Transistor,
2SA561
(O)
R166
RA0Q501001
Trimmer,
5002
H115
HT402351B
Transistor,
2S
D235
(O)
R167
RAQ501001
Trimmer,
5002
H116
HT402351B
Transistor,
2SD
235
(O)
R168
RT1010314
10KQ
H117
HT402351B
Transistor,
2S
D235
(O)
R169
RT1010314
10KQ
H118
HT402351B
Transistor,
2SD235
(O)
R170
RT1010414
100KQ
H119
HV0000705
Varistor,
S-3016R
R171
RT1010414
100KQ
H120
HV0000705
Varistor,
S-3016R
R172
RJ1056103
56002,
3W
H121
HV0000705
Varistor,
S-3016R
CAPACITORS
H122
HV0000705
Varistor,
S-3016R
C101
EA3350509
Elect.,
3.3uF,
50V
H123
HV0000705
Varistor,
S-3016R
C102
EA3350509
Elect.,
3.3uF,
50V
H124
HV0000705
Varistor,
S-3016R
C103
EA3360109
Elect.,
S3uF,
10V
H125
HD2000110
Diode,
1S-1665
C104
EA3360109
Elect.,
33uF,
10V
H126
HD2000110
Diode,
18-1665
C105
DF1715301
Mylar,
0.015uF
+20%
H127
HD2000110
Diode,
1S-1665
C106
DF1715301
Mylar,
0.015uF
+20%
H128
HD2000110
Diode,
1S-1665
C107
DF1747201
Mylar,
0.0047uF
+20%
C108
DF1747201
Mylar,
0.0047
uF
+20%
MISCELLANEOUS
C109
EM4740251
Elect.,
0.47uF,
25V
J101
YP1000094
Plug
C110
EM4740251
Elect.,
0.47uF,
25V
J102
YP1000094
Plug
J103
YP1000094
Plug
C111
EA2270109
Elect.,
220uF,
10V
J104
YP1000094
Plug
C112
EA3350509
Elect.,
3.3uF,
50V
J105
YP1000094
Plug
C113
EA3350509
Elect.,
3.3uF,
50V
J112
YP1000094
Plug
C114
EM4740251
Elect.,
0.47uF,
25V
J113
YP1000094
Plug
C115
EM4740251
Elect.,
0.47uF,
25V
C116
EA1070169
Elect.,
100uF,
16V
P200
YD2792002
P.W.
Board
C117
EA3350509
Elect.,
3.3uF,
50V
ZZ
2861102
P.W.
Board
Ass‘y
C118
EA3350509
Elect.,
3.3uF,
50V
C119
DD1630001
Ceramic,
30pF,
+10%
RESISTORS
C120
DD1630001
Ceramic,
30pF,
+10%
R201
RT
1056214
Carbon,
5.6KQ
+10%,
YaW
R202
RT
1056214
Carbon,
5.6KQ
+10%,
YaW
C121
EA1050509
Elect.,
1uF,
50V
R203
RM0503038
Variable,
50KQ
(A)
x
2,
Bass
C122
EA1050509
Elect.,
1uF,
50V
R204
RT1010214
Carbon,
1KQ
+10%,
Yaw
C123
DD1650001
Ceramic,
50pF
+10%
R205
RT1010214
Carbon,
1KQ
+10%,
YaW
C124
DD1650001
Ceramic,
5OpF
+10%
R206
RT1027214
Carbon,
2.7KQ
+10%,
YW
C125
EA3360259
Elect.,
33uF,
25V
R207
RT1027214
Carbon,
2.7KQ
+10%,
YaW
C126
EA3360259
Elect.,
33uF,
25V
R208
RM0503038
Variable,
50KQ
(A)
x
2,
Treble

i PART NO. DESCRIPTION
CAPACITORS
DF 1747301 Mylar, 0.047uF +20%
DF1747301 Mylar, 0.0474F +20%
EM4740251 Elect., O.47uF, 25V
EM4740251 Elect., O.47uF, 25V
DF1722201 Mylar, 0.0022uF +20%
DF1722201 Mylar, 0.0022uF +20%
DF1722301 Mylar, 0O.022uF +20%
DF1722301 Mylar 0.022uF +20%
RESISTORS (AIl resistors are +10%,
YW and carbon type,
unless otherwise indi-
cated.)
RT1039314 39KQ
RT1039314 39K
RT1022414 220KQ
RT1022414 220K2
RT 1010314 10KQ2
RT1010314 10KQ
RT0522314 22KQ2 +5%, YaW
RT1010314 10KQ
RT1010314 10KQ
RT0522314 22KQ +5%, YaW
RT1010314 10KQ
RT1010314 10KQ
RT1068114 6802
RT1068114 6802
RM0503044 Variable, 50KQ (A) x2, Volume
RT1082114 8202
RT1082114 8202
RK0O203021 Variable, 20KQ, Balance
RT1022114 2202
RT1022114 22022
RT0582314
RT0582314
82K
82K
15%,
15%,
YaW
YaW
A-245 (E)
(ae PART NO. DESCRIPTION
CAPACITORS
DD1650101 Ceramic, 500pF +20%
DD1650101 Ceramic, 500pF +20%
EM4740251 Elect., 0.47uF, 25V
EM4740251 Elect., 0.47uF, 25V
DF1722380 Mylar, 0.022uF, 1000V DC
DK1710301 Ceramic, 0.01uF +20%
MISCELLANEOUS
so0o1 $S0202017 Phono Selector Switch
S002 S$R0403008 Function Switch
$003 SP0403004 Speaker, Tape Mon., Loudness Switch
SP0201011 Power Switch
YT0210001 Terminal
J002 Y JO200007 Lamp Socket
J006 Y JO400032 AC Outlet Jack
J007 Y¥ JO100069 Headphone Jack
JO008 Y¥ JO108002 Terminal
JO09 Y¥LO105003 5P Lug Terminal
J010 ¥LO301020 Ground Terminal
JO11 YLO105003 5P Lug Terminal
J012 YLO105003 5P Lug Terminal
Y¥ JO800009 Fuse Holder
YLO106004
YJ1100001
Terminal
DIN Socket
IN 1006006 Lamp, 6V, 60mA
TS1660113 Power Transf.
FS 1030004 Fuse, 3A, 250V
Y B0027001
YB0007001
YB0007001
YC0190003
Wiring Materials
Wiring Materials
Wiring Materials
AC Cord
VOLTAGE CONVERSION
This model is equipped with a universal power transformer to permit operation at 110, 120, 220, 240 Volts AC 50/60
Hz.
To convert the unit to the required voltage, change the jumper wires as illustrated .
CAUTION: DISCONNECT POWER SUPPLY CORD FROM AC OUTLET BEFORE CONVERTING VOLTAGE.
BROWN RED YELLOW ORANGE GREEN S8L.UE ROWN RED
ISIGIGISIe alesse
( ba y(1)-(
© HoH
Y
palatal alte 4
(at)
J, : SURE
For 110V Operation
(
For 120V Operation
€D YEL
BRO REO VELL
~ oN
oe) KS) . tials f
For 220V Operation For 240V Operation
Voltage Conversion Chart