Page 1
price
$6.00
SERVICE
MANUAL
stereo
components
R-326
1-526
1-526L
®
Ci)
SS
Cc
©)
I
I
_..
where
innovation
is
a
tradition
H.
H.SCOTT,
INC.,
111
Powder
Mill
Road,
Maynard,
Massachusetts 01754,
Tel.
617
897-8801
Page 2
AUDIO
SPECIFICATIONS
Output
Power
R316
.
.
20
watts
per
channel
min.
R316,
R326
R316L
RMS
at
8
ohms
than
0.5%
total
harmonic
distortion.
R326
. .
30
watts
per
channel
min.
RMS
at
8
ohms
than
0.5%
total
harmonic
distortion.
Input
Sensitivity
Phono
. «
6
«©
«©
©
© © © © ©
Mic
2.
6
«©
©
«©
©
©
©
©
©
wo
ew
we
Aux
2.
0
6
©
@
eo
et
ew
ew
ew
we
ew
Tape
Recorder
.
....
+.
ee»
Signal-to-Noise
Phono
. . 2 6
© © ©
©
we
we
ew
we
Mic
.
2.
«©
«©
©
«©
©
©
©
©
eo
ew
ow
AUX
2
6
©
©
©
©
©
©
©
©
©
«©
©
Frequency
Response
. .
.
+.
«
©
« «
Phono
Response
RIAA
......
»
Phono
Overload
. .
2...
2 2 6
«©
© «
Max.
Input
Signal
Phono
(IHF)
..
Input
Impedance
Phono
.«
«6 «6
«
«©
©
«© «©
©
©
©
©
AUK
2.
6
«
0
6
©
©
ee
eo
ew
we
Tape
. 6
«©
2 ©
© © ©
we wo
ww
Cross
Talk
@
1
kHz
@10
kHz
.
1.
2.
sw
«©
ew
oe
Rated
Harmonic
Distortion
R316
«2
©
@
ww
we we
ew
we
ew
R32
6
e
e
e
e
°
e
*
e
°
e
e
e
e
Intermodulation
Distortion
R316.
1
ew
we
ew we
we
te
ee
ww
R326
o . e e e
. e
°
e
e o e e
From
0.5
Watts
to
rated
equivalent
operating.
Bass
Control
Range
.....+2.+s.
Treble
Control
Range
.
....e-s
High
Filter
....
2...
2.
see
Low
Filter,
R326
......
e468.
Loudness
Comp
....
+ « © e « «
sine
wave
CONTROLS
from
40-20,000
Hz
from
40-20,000
Hz
3.
7.
3,
7.
5
5
d
i)
5
with
both
.
S58
at
at
at
at
with
no
more
with
no
more
2.5
6.0
160
160
mV
mV
mV
mV
60
dB
65
dB
.
75
dB
Hz to
35
kHz
+1
dB
60
mV
42
dB
47,000
ohms
60,000
ohms
60,000
ohms
e
45
dB
35
dB
0.5%
0.5%
0.15%
0.1%
channels
+10.5
dB
(+1
dB)
100
Hz
+10.7
dB
(+1
dB)
10
kHz
+1
aB
+1
dB
+1
dB
+1
dB
10
kHz
100
Hz
10
kHz
100
Hz
Page 3
FM
TUNER
SECTION
Usable
Sensitivity
Mono
.
2.
6
«© «©
© ©
«©
© ©
©
© © ©
oe ow
ee
lt
lt
Stereo
.
6.
1
0
0
ee
eo
ee
th
tte
th
tt
50
dB
Quieting
Sens.
Mono
.
«
«©
«©
©
©
© © © © ©
© 8
6
8
ee
ell
Stereo
.
2.
«
©»
«©
©
©
©
©
©
©
©
8
te
ee
ll
Signal-to-noise
@
65
dBf
Mono
.
2.
«6 «©
«©
© © © © © ©
0
eo
ee
ee
le lw lw
Stereo
.
2.
2 2
ee
we
we
et
we
et
et
te
wt
Frequency
Response
30-15,000
Hz
Mono
.
.«
« « ©
©
© ©
«©
©
© ©
© ©
©
©
©
ee
Stereo
.
2.
2.
2»
«©
©
©
©
©
wo
we
te
we
eh
eh
el
hl
Distortion
@
65
dBf
Mono
.
«
«
«©
«©
«©
© ©
«©
©
© ©
© ©
©
© © ©
©
8
Stereo
.
2.
6
«
©
©
©
©»
© © ©
©
©
ew
ll
lw
Alternate
Channel
Selectivity
.
.
2.
+ «
2»
«©
ew
«
Stereo
Separation
100
Hz
2.
6 « ©
ew
ww ee
we th
tlt
ltt
ltl
tt
ll
1,000
Hz
.
«1
1 0
ww
eo
ew we
et
wh
wt
te
10
,900
Hz
» e e ° . e e
e
J
.
.
°
se
e
e ° .
eo
Tuning
Range
.
2.
6
«
«©
©
© ©
© © ©
eo
we
ee
we
Deemphasis
(switchable)
.
.
2.
6
6
ee
ees
°
.
ee ee
7.0
ABE
(2.5
BV)
we
a
ee)
624
ABE
(18
pV)
«+
»
« »
10
dBE
(3.5
pV)
oe
©
©
«4
36
dBf
(70
wv)
Pe
a
os
Bo)
oe
es
eo
we
ew ew we
he)
«665
CB
wee
ee
ee
ee
F2
wee eee
ee
ee
2
GB
Pe
0.3%
a
0.5%
a
YA
9)
we
ew ew
ew
ew
ew
ew
©)
686
CB
oe
eo
eo
ee
we
we
640
GB
eee
ee
ew
hh
ew
e684
CB
e
.
cd
e
° e
87.
5-
108.
MHZ
25,
50
&
75
pS
Tuning
Indicators
.
.....
+...
..
.
Meter,
Signal
Strength
&
Center
Tune*
Interstation
Muting
. 2.
.«
«=
2 « ©
«©
© ©
«©
©
ww
Stereo
Threshold
......-«
«©
«©
©
©
©
©
©
«
°
oo
oe
tw
ew
Switchable
o
»
«
«
»
7-15
pV
Preset
Muting
Threshold
.....
50.
6 2
ee
eee
7-
15
uV
Preset
(switchable,
On-Off)
Antenna
Input
.
...
6
6
6
«©
©
«
«©
©
«©
«©
»©
300
ohm
Balanced,
75
ohm
Unbalanced
AM
TUNER
SECTION
Usable
Sensitivity
.
2.
2.
2.
6
«©
©
«©
©
we we we
we
ew
Selectivity
.
.
1.
2.
2
1
©
©
©
oe
ww
oe
tw
we
ww
Signal-to-noise
Ratio
.
2...
6.
«©
©
©
©
ew
we
we
ow
Total
Harmonic
Distortion
(40%
modulation)
...
Tuning
Indicator
.
.
1.
2
2
6
«©
©
©
ew
wo
we
we
we
wo
Antenna
.
2.
6
6
+»
«©
©
©
©
©
©
©
©
we
ew
ee
ew
Tuning
Range
.
2.
« 2 6
«©
©
© © ©
te we
wt
we
te
Long
Wave
Tuning
Range
. 2
«
6
©
©
© ©
ee
we
we
*signal
strength
meter
only,
in
Model
R316
ce
ee ee
200
pV/m
ee
ee
ee
eh
ed
3D
GB
min.
eee
we
ew
ew
ee
6
650
CB
a
2.0%
ee
ee
ew
oe
ew
eh
elh)6hMeter
Built-in
Ferrite
Loopstick
se
we
535
kHz-1605
kHz
ce
ee
150
kHz-350
kHz
Page 4
GENERAL
SPECIFICATIONS
Power
Line
Requirement
120
Volts,
60
Hz
Power
Consumption
R316...
1
we
we
ee
ee
we
tlt
lhl
whl
whl
whl
elhlehe™©6CU2S5
Watt
min.
205
Watts
max.
R326
.
2
6
©
©
0
ob
ew
ew
we
ew
tlt
el
lle
wl
ele)
628
Watts
min.
270
Watts
max,
Dimensions
«.«
« « © ©
«©
«© « © © © © © © ew ew
ew)
618
«67/16 x 15
3/16 x 5
5/8
inches
.
oe
ee
we
wt
wt
tw
wt
tt
lw
tw
ww
wl
wl
ew
w)~=6466
X
390
X
142
om,
Weight
R316
we
ee
ee
ee
ee ee
we
ee ee
ew
ee
ee)
2545
lbs.»
2
11.6
keg.
R326
2
ee
ee
ee
ww
ww
te
wee
ee
ew
ww
we)
62665
Ibs...)
12
ge
Shipping
Weight
.......
Add
4
ibs.
1,82
kg
for
container
and
materials.
AUDIO
SPECIFICATIONS
T526
Output
Impedance
Tape
Output
and
Fixed
Output
.......+
2.2
«©
«se
we
ee
we
10,000
ohms
Adjustable
Output
.
2.
2.
6
©
2
©
so
ew
we
we
tw
Approx.
10,000
ohms
Output
Level
Tape
Output
and
Fixed
Output...
.....
++...
es
0.5
Volts
@
400
Hz
Adjustable
Output
.
.
2.
6
©
©
©
©
©
©
©
©
©
©
we
@
ew
O
-
O.5
Volts
G@
400
Hz
GENERAL
SPECIFICATIONS
Power
Line
Requirement
.
..
2.
« e
¢
«
«©
© ©
©
© ©
©
© @
«©
«
120
Volts,
60
Hz
Power
Consumption
.
.
2.
26
«
«
©
«©
©
»
©
©
©
©
©
©
©
©
©
©
©
ow
ew
ew
hel
h
e)615
UWWatts
Dimensions
....
s+
2»
©
© ©
©
«©
© © @
© ©
w)6
615
3/4
x
13
3/4
x
5
5/8
inches
oe
0
ee
ow
ew
ww
tt
we
we
ww
we
tlw
lw
el
ew
400
X
350
x
142
mm.
Weight
.
2.
2 6
+ © 0 © © ©
© © © ©
ee
8
ow ew
th
ww
hw
hw
«16,45
Lb,
7.5
kg.
Shipping
Weight...
..
.
Add
31/4
lbs.
1.5
kg.
for
container
and
materials.
POWER
LINE
REQUIREMENT
Models
R316L
&
T526L
.
4...
1
ew
ee
we
we ew ew
ee
ew)
61LO0V*~,
120V,
220V,
or
240V
oe
eo
ew
ew
ew
ew
el
wl
thle
hl
whl
wh
w!™CUCéOD
ox
60
Hertz
Page 5
TEST
AND
ALIGNMENT
PROCEDURES
RECOMMENDED
EQUIPMENT
(or
equivalent)
1.
AC
vacuum
tube
Voltmeter
(H.P.
400D)
2.
DC
millivolt
meter
(Fluke
8000A)
3.
Oscilloscope
4,
Volt-Ohm
meter
(Triplett
model
630)
5.
Harmonic
Distortion
meter
(H.P.
331A)
6.
AM
Signal
Generator
(H.P.
606A)
7.
FM
Signal
Generator
(Measurements
Corp.
model
88)
8.
Multiplex
Generator
(Scott
model
830)
9,
Audio
Oscillator
(H.P.
200
CD)
0.
Standard
AM
dummy
antenna
(200
puF
ceramic
or
mica
capacitor)
1
.
Standard
FM
dummy
antenna
for
300
ohm
balanced
input
(see
circuit,
Figure
FM-1)
12,
Suitable
alignment
tools,
cables,
etc.
13.
Two
8
ohm
resistive
loads,
compensated
for
L
&
C
(min.
50W)
14,
Variable
power
line
transformer
(General
Radio
5A)
15.
Suitable
line
Voltage
and
current
monitoring
meters
Note:
Equipment
specifications
are
minimum,
Set
controls
to
following
positions
for
test
procedure.
Deviate
from
these
settings
as
instructed
in
the
test
procedures.
Return
to
these
settings
at
the
beginning
of
each
new
test.
All
tests
are
to
be
made
with
117V
AC
line.
Unless
otherwise
specified,
supply
input
to
both
channels
and
read
both
outputs.
Front
Panel
Input
Selector
Aux
Tone
Controls
Flat
(12
O'clock)
Loudness
Minimum
(full
CCW)
Balance
12
O'clock
Speaker
#1
On
Note:
When
troubleshooting
defective
power
circuits,
it
is
some-
times
useful
to
switch
a
small
line
voltage
lamp
in
series
with
equipment
under
test
before
applying
power.
The
lamp
will
limit
the
current
drawn,
thus
preventing
further
damage
to
circuit
com-
ponents.
The
variable
power
line
transformer
is
also
useful
to
determine
if
additional
short
circuits
exist,
if
used
with
a
power
line
current
and
Volt
meter.
Note:
When
power
line
voltages
other
than
120
V.A.C.
are
used
for
testing,
be
sure
voltage
selector
in
the
unit
is
set
to
the
appro-
priate
position
and
that
equivalent
test
equipment
is
used,
Page 6
Where
a
standard
FM
antenna
matching
network
is
not
available
for
the
particular
signal
generator
in
use,
a
suitable
network
can
be
assembled
on
a
small
phenolic,
or
plastic
board,
using
the
circuit
below.
The
completed
assembly
should
use
short
leads
for
connection
to
the
receiver
antenna
terminals.
Some
generator
cables
may
permit
the
circuit
block
to
be
attached
directly
to
the
cable
terminals.
300.0
From
52.320
Gnd.
500
Generator
O———4
MWA)
300-2
150.0.
Note:
All
resistors
are
1/2
Watt,
carbon
composition,
selected
on a DVM,
or
Wheatstone
bridge.
NOTE:
Models
R~B16L
and
T-526L
are
designed
to
tune
two
AM
frequency
bands.
See
tuning
ranges
listed
on
page
2.
In
model
R-316L,
band
switches
replace
FILTER
AM
and
FILTER
MPX.
In
model
T-526L,
band
switches
replace
DIM
switch
and
DE-EMP
switch.
Page 7
TEST
CONTROL
INPUT
SETTINGS
TEST
EQUIPMENT
SCALE
SETTINGS
MEASURE
AT
POSITIVE
PROBE
NEGATIVE
PROBE
READINGS
TOL.
NPN
Output
transistor
Q807
&
Q817
None
Unit
"OFF"
Triplett
630A
Ohms
X
1000
+
Filter
cap
P809
P806
OK
HK
NPN
Output
transistor
Q810
&
Q820
None
Unit
"orp
Triplett
630A
Ohms
X
1000
P809
P806
-
Filter
cap
700
ohms
+1K
+200
ohms
Bt+
Supply
None
Volume
Unit
"Minimum"
"on"
Selector
ey
Triplett
630A
Volts
+
Filter
cap
Chassis
R316 - 26V
R326 - 32V
T526 - 24V
415%
Supply
None
Volume
Unit
"Minimum"
“on!
Selector
Ney
Triplett
630A
Volts
60
DC
Chassis
-
Filter
cap
R316 - 26V
R326 - 32V
+15%
Regulated
B+
Voltage
None
Volume
Unit
"Minimum"
"on
Selector
Ney
Triplett
630A
Volts
60
DC
P901
Regulator/
Supply
Board
Chassis
+13V
DC
+10%
Output
Offset
Voltage
None
Volume
Unit
"Minimum"
"on!
Selector
WAux"
DC
Milli-
Voltmeter
100mV
Speaker
#A
1
Speaker
#A
Wen
+100mV
max.
Max.
Bias
Check
None
None,
if
Unit
necessary,
Non!
adj.
padd-
ing
resis-
tor
across
R808
L.
Ch.
R830
R.
Ch.
Triplett
630A
12mA
DC
only
"E"
of
Q807
"E"
of
Q817
"Cc"
of
Q810
"C"
of
Q820
Adjust
pad
for
0.2mA
DC
nominal
Unit
temperature
approx.
100°F,
42°C
+100%
-0
Page 8
AUDIO
TEST
PROCEDURE
TEST
INPUT
CONTROL
SETTINGS
TEST
EQUIPMENT
SCALE
MEASURE
AT
SETTINGS | SOSTTIVE
PROBE
NEGATIVE
PROBE
READINGS
Speaker
A
Audio
Level
8
ohm
1000
Hz
Aux.
Selector
"Aux . W
Mono
Switch
"Ty"
Volume
"Maximum"
AC
VIVM
Scope
30V
Speaker
A
pi
8
ohm
load
high
10V/DIV
Speaker
A
No"
8
ohm load
low
Adjust
input
signal
for
output
of:
R-316
-
12.7V
R-326 - 15.5V
(No
Clipping
per-
mitted)
+1
dB
-O
dB
Tape
1
Inputs
Tape
2
Inputs
Tape 1 in
1000
Hz
Tape 2 in
1000
Hz
Tape
Monitor
Switch
"Monitor"
(Volume
Maximum)
AC
VIVM
30V
Speaker
A
ip
8
ohm
load
high
Speaker
A
Ng
8
ohm
load
low
Same
as
above
Tape
Monitor
Output
Aux.
Selector
NAux
tt
Volume
"Minimum"
AC
VIVM
1V
Tape
Out
Ground
Output
of
0.15V
with
input
of
0.15V
Audio
Level
8
ohm
Aux.
1000
Hz
Selector
NAux
vt
Mono
Switch
"Mono"
Volume
"Maximum"
Spkr.
B.
On
VIVM
30V
Speaker
B
my
tt
8
ohm
load
high
Speaker
B
Na
8
ohm
load
low
Adjust
input
signal
for
output
of:
R-316 - 12,7V
R-326 - 15.5V
(No
Clipping
per-
mitted)
Check
Spkr.
A&B
:
Same
as
i
above
As
above
except
Spkr.
A&B
AC
VIVM
30V
Speakers
A & B
wpe
&
pu
8
ohm load
high
Speakers
A &
B
Ng"
8
ohm
load
low
Output
check
only,
check
at
low
level
Frequency
Response
Power
Amp
&
Tone
Control
Aux.
Tone
Con-
trol
"Flat"
Volume
"Maximum"
Adjust
bal-
ance
for
center
AG
VIVM
1V
Speaker
A
Mp
8
ohm
load
high
Speaker
A
Nau
8
ohm
load
low
Adjust
input
for
0
dB
(.775V)
output
(3
dB
down
points
should
be
below
10
Hz
and
above
30
kHz)
+1dB
Page 9
AUDIO
TEST
PROCEDURE
TEST
INPUT
CONTROL
SETTINGS
TEST
EQUIPMENT
SCALE
SETTINGS
MEASURE
AT
POSITIVE
PROBE
NEGATIVE
PROBE
READINGS
TOL.
Frequency
Response
Phono
(RTAA)
Phono
1000
Hz
Selector
"Phono"
Keep
setting
listed
above
AC
VIVM
1V
Speaker
ty
8
ohm
load
A
high
Speaker
A
Natt
8
ohm
load
low
Adjust
input
for
0
dB
(.775V)
output
Note:
100
Hz
+12,5
dB
10
kHz
-13.0
dB
+1.5
dB
Tone
Control
Response
Aux.
1000
Hz
Selector
"NAux.
tt
Mode
Switch
"Mono!
Tone
Control
"Flat"
AC
VIVM
3V
Speaker
my
8
ohm
load
high
Speaker
A
"tg
8
ohm
load
low
Adjust
input
for
O
dB
(.775V)
output
Note:
@
100
Hz
Bass
boost
+10
dB
Bass
cut
-10
dB
@
10
kHz
Treble
boost
+10
dB
Treble
cut
-10
dB
+1.5
dB
+1.5
dB
Loudness
Compensa-
tion
Aux,
1000
Hz
Selector
WAux
."
Tone
Control
"Plat"!
Volume
"1
O'clock"
Loudness
Sw.
Non"
AC
VIVM
3V
Speaker
my
8
ohm
load
high
Speaker
A
Nat
8
ohm
load
low
Adjust
input
for
Q
dB.
Frequency,
to
10
kHz;
Note 3 dB
increase.
Frequency
to
100
Hz;
Note 7 dB
increase
+1
dB
+1
dB
Crosstalk
Aux.
Left
Channel
10
kHz
Selector
WAux . i
Tone
Control
"FLac"!
Comp.
Sw.
Nofet
Volume
"Maximum"
Mode
Switch
"Stereo"
AC
VIVM
3V
Speaker
Mp
8
ohm
load
high
Speaker
A
Ng"
8
ohm
load
low
Set
output
for 0 dB
Read
right
channel
output
35
dB
down
Min.
Page 10
AUDIO
TEST
PROCEDURE
CONTROL
TEST
SCALE
MEASURE
AT
SETTINGS
EQUIPMENT
SETTINGS
POSITIVE
PROBE
NEGATIVE
PROBE
READINGS
TOL.
TEST
INPUT
Balance
Aux,
Selector
AC
VIVM
3V
Speaker
A
Speaker
A
Set
output
for 0 dB
Control
:
"Aux."
mp
Ng"
Left
Tone
Control
8
ohm
load
high
8
ohm
load
low
Note
45
dB
drop
in
+42
dB
Channel
"Flat"
output,
right
chan.
_
1000
Hz
Comp.
Sw.
Nore"
Volume
"Maximum"
Mode
Switch
ono"!
Balance
CCW
Balance
CW
"
"
Note
45
dB
drop
in
output,
left
chan.
42
dB
Harmonic*!
Aux.
Selector
AC
VIVM
30V
Speaker
A
Speaker
A
Adjust
input
for
Distortion
"Aux,"
ue
"gn
output @ both
chan,
20
Hz*
|Mode
Switch
|
Harmonic
8
ohm
iload
high
8
ohm
load
low
R316 - 12.7V
1000
Hz
"Mono"
Distortion
R326 - 15.5V
20,000
Hz|
Balance
Analyzer
*(R316
&
"Center"
R326
-
Volume
40
Hz)
"Maximum"
0.5%
*Note:
Power
line
Voltage
120
VAC
<2.0%
line
THD.
When
transformer
primary
is
connected
for
other
than
120
Volts,
use
appropriate
supply
voltage.
Damping
Aux.
Selector
AC
VTVM
3.0V
Speaker
A
Speaker
A
Set
output
to
2,45V
Factor
1000
Hz
"Aux,"
"yf
Ng"
(+10
dB)
Mode
Switch
8
ohm
load
high
8
ohm
load
low
"Mono"
Remove
load
and
note
Balance
increase
in
level
"Center"
Volume
Max.
O.5
dB
"Maximum"
Page 11
AM
MW
TEST
PROCEDURE
STEP
SIGNAL
SIGNAL
INPUT
DIAL
TEST
ANTENNA
GENERATOR
GENERATOR
SELECTOR
SETTING
INSTRU-
ADJUST
REMARKS
COUPLING
FREQUENCY
SWITCH
MENTS
I.
Connect
exter-;
External
455
kHz
AM
Approx.
Scope,
|
1.F.
coils
Adjust
for
maximum
signal
nal
antenna
antenna
60%
mod,
MW
600
kHz
VIVM
T207
output
terminal
thru
terminal.
400
Hz
(No
sta.)
|
@
Tape
T208
220
pF
dummy
Keep
signal
Output
antenna
level
low.
Same
as
above
|
Same
as
above
600
kHz
Same
600
kHz
Same
AM
MW
Osc.
Adjust
for
calibration
T203
Same
as
above
|
Same
as
above
1400
kHz
Same
1400
kHz
|
Same
AM
MW
Osc.
Adjust
for
calibration
Trimmer
AM1
(F.E.
ass'y)
Same
as
above
;
Same
as
above
1400
kHz
Same 1400
kHz
|
Same
MW
R.F.
Adjust
for
maximum
signal
Trimmers
AM2,
AM3
(F.E.
ass'y)
Same
as
above
|
Same
as
above
600
kHz
Same
600
kHz
Same
MW
Antenna
Adjust
for
maximum
signal
slider
under
|
(soften
wax,
then
reseal)
bracket
(See
figure)
Repeat
steps
2,
3,
4, 5 for
maximum.
Same
as
Step
1
300nV
1400
kHz
AM
1400
kHz
|
VIVM
&
|
Detector
Adjust
for
maximum
undis-
60%
mod.
MW
Distor-|
1209
torted
output
(1%
or
less).
tion
Output
should
fall
between
Anal-
600
and
800
mV.
yzer
Whistle
Filter
Alignment:
Connect
output
of
audio
oscillator
to
junction
of
R215
&
C225.
Set
oscillator
frequency
to
1.0
kHz,
adjust
audio
oscillator
output
for
1.0
Volt
at
tape
output.
Change
oscillator
frequency
to
9.5
kHz
and
adjust
T210
for
minimum
output.
Ol
Page 12
Lh
AM
LW
TEST
PROCEDURE
SIGNAL
SIGNAL
INPUT
DIAL
TEST
STEP
ANTENNA
GENERATOR GENERATOR
SELECTOR
SETTING
INSTRU
-
ADJUST
REMARKS
COUPLING
FREQUENCY
SWITCH
MENTS
9. | Same
as
Step
1;
Same
as
Step
1
150
kHz
AM
150
kHz!
Same
as
AM
LW
Osc.
Adjust
for
calibration
LW
Step
1
T204
10,
Same
as
above
|
Same
as
above
350
kHz
Same
350
kHz
Same
AM
LW
Osc.
Adjust
for
calibration
Trimmer
C236
li.
Same
as
above | Same
as
above
350
kHz
Same
350
kHz | Same
LW
RLF.
Adjust
for
maximum
signal
Trimmers
C235,
C237
12.
Same
as
above
Same
as
above
150
kHz
Same
150
kHz
Same
LW
Antenna
Adjust
for
maximum
signal
slider
under | (soften
wax,
then
reseal)
bracket
(See
figure)
13.
Repeat
steps
9,
10, 11,
12
for
maximum.
14,
Same
as
Step
1]
Same
as
Step
1
455 kHz
AM
Approx.
Scope,
455
kHz
trap | Tune
for
Null
LW
350
kHz{
probe
T206
(No
sta.)}}
at
IC
PIN
1
(aA
720)
NOTE:
AM
IF
is
aligned
at
the
factory
using
sweep
generator.
Do
not
disturb
coil
adjustment
unless
replacement
coils
are
installed,
Align
new
coil
using
5
kHz
generator
modulation,
Adjust
for
maximum
audio
output.
Page 13
él
FM
TEST
PROCEDURE
STEP
ANTENNA
SIGNAL
GENERATOR
COUPLING
SIGNAL
GENERATOR
FREQUENCY
INPUT
SELECTOR
SWITCH
DIAL
SETTING
OUTPUT
METER
ADJUST
REMARKS
1.
Dummy
antenna
Figure
FM-1
External
300
ohm
term.
Use
low
signal
level
10.7
MHz
100%
mod,
FM
Off
Station
VIVM
@
Tape
Output
Front
End
IF
Adjust
for
maximum
signal
strength
meter
indication
Same
as
above
Same
as
above
90
MHz
1
kHz
Modu-
lation.
Keep
generator
output
low.
Same
90
MHz
Same
Front
End
LO
Adjust
for
dial
calibration
Same
as
above
Same
as
above
Same
Same Same
Same
Front
End
LA
LR,
LR,
Adjust
for
maximum
audio
output.
Keep
signal
level
low.
Same
as
above
No
output
Same
as
above
Same
Off
Station
Use
noise
only
Same
Same
Detector
T102
Use
center
tune
meter
(R326).
R316
use
DC
VIVM
con-
nected,
negative
to
ground,
positive
to
P106.
Adjust
for
zero
DC
Volts.
Same
as
above
External
300
ohm
tern.
Use
low
signal
Level
90
MHz
FM
90
MHz
VIVM
@
Tape
Output
T1i01
Adjust
for
maximum
output
and
minimum
distortion
Same
as
above
Same
as
above
106
MHz
Keep
Gener-
ator
output
low
Same
106
MHz
Same
TCO
Adjust
for
dial
calibration
Same
as
above
Same
as
above
106
MHz
Same
106
MHz
Same
TCA,
TCR
d
TCR
an
9
1
Adjust
for
maximum
audio
output,
keep
input
level
low
for
noisy
signal
Repeat
steps
2,
3, 6 and 7 until
no
further
improvement
is
noted.
Check
specification.
Page 14
el
MULTIPLEX
USE
19
kHz
OUTPUT
OF
MX
GENERATOR
TO
TRIGGER OSCILLOSCOPE
HORIZONTAL
SIGNAL
SIGNAL
INPUT
STEP
ANTENNA
GENERATOR
GENERATOR | SELECTOR
SREIN C METER
ADJUST
REMARKS
COUPLING
FREQUENCY
switch | 52!
1.
Dummy
antenna | External
Use
conven-
FM
Tune
to}
VIVM
R143
for
Generator
output
to
zero.
Figure
FM-1
300
ohm
term.
ient
freq.
Gen.
@
Tape
stationary
Scope
Vertical
to
P116.
Output
waveform
Muting
on
(19
kHz
Osc.
adj.)
2.
Same
as
above|
Same
as
above
Same
FM
Same
Same
Generator
output
1.0mV
Stereo
Note
waveform
is
synchronized
3.
Same
as
above|
Same
as
above
Same Same
Same
Same
R132
Adjust
for
maximum
separation
4.
Note:
Multiplex
filter
coils L101,
L102,
L103
and
L104
are
pre-aligned.
Do
not
adjust
unless
circuit
component
is
replaced,
If
necessary,
adjust
for
null
at
specified
frequency.
DEEMPHASIS:
With
output
level
reference
at
400
Hz,
switch
modulation
frequency
to
10
kHz.
Output
level
as
follows:
+1
dB
75
ys
13.7
dB
50
us
9.5
dB
25
wS
4.5
dB
Page 15
SCHEMATIC
DIAGRAM
TUNER
SECTION
R316,
R326
PAM
ANT
FM
ANTS
EXT
GND
3007
6ND
75
Tio!
TH
t
|
C7
ngig
14
ANT
COIL
23623
cro
ok 3F
1033
L20n
R201
1a
201
u
ro
L2c3
I
CENTRE
METER
MINI
DIP
‘
'
ICI01
,Ic
102
ono
Jor
view
UU
5
8
oem*
LM703
REPLACE
WITH
—=>
1
HIGH
INPUT
2
GND
3
LOW
INPUT
anc
5
OUTPUT
6
B+
7
DECOUPLING
@
NC
14
+8
dt
di
PG
TUNER
SECTION
SEMICONDUCTOR
LIST
Q101,
Q102, Q103
.
Ql04,
Ql05
.
Ql06
.
.
Ic101,
IC102
.
Q20l..
:
AM
Integrated
Circuit
Multiplex
IC
.
CS
9016G
or SE
1001
2SC
374
or
CS
9014C
2SC
374
or
CS
9014C
LM
703
or
pA
703
2N
3823
or
JF
1033
pA
720
HA
758
or
ULN
2244
Ma
z
ZH
OE
iolt
ZHM
6!
zon
DC
VOLTAGES
AT
INTEGRATED
CIRCUIT
PINS
OE-Empwesis
sw
PIN#
IC101
1.4V
1.4V
Ic102
1.4V
1.4V
(station)
0.9V
(mute)
ov
11.4V
13V
12V
BA
758
pA
720
5V
7.3V
7.4V
oO
OV
11.4V
13V
12V
4.5V
4.5V
5.0V
13.7V
OV
1.5V
(mono)
2.8V
(stereo)
2.8V
1.8V
2.7V
2.8V
2.8V
2.5V
13.7V
5V
0.2V
12V
0,8V
OV
ov
TNO
MmM
OO
10
il
0.7V
0.7V
0.7V
12V
13V
12V
40mA
13
14
15
16
JEDEC
TO
78
at-00!
HH.S."4-007
or
yA703
4-008
|
DECOUPLING
2c
3
HIGH
INPUT
4
GND
8
LOW
INPUT
6
NC
7
OUTPUT
6
Bt
15
Page 16
PIN#
tTNOMmM
OD
11
19
LZ
13
14
15
16
TUNER
SECTION
SEMICONDUCTOR
LIST
Q101,
Q102,
Q103
......
Q104,
Q105..
.
Ql06.....
Tc101,
1c102
.
Q20l.....
AM
Integrated
Circuit
...
Multiplex
IC
.
CS
9016G
or
SE
1001
2S8C
374
or
CS
9014C
2SC
374
or
CS
9014C
LM
703
or
pA
703
2N
3823
or
JF
1033
yA
720
pA
758
or
ULN
2244
DC
VOLTAGES
AT
INTEGRATED
CIRCUIT
PINS
Ic101
1.4V
1.4V
ov
11.4V
13V
12V
1c102 BA
758
1.4V
1.4V
(station)
0.9V
(mute)
OV
11.4V
13V
12V
3.2V
4.6V
5.2V
4.5V
4.5V
5.0V
13.7V
ov
1.5V
(mono)
2.8V
(stereo)
2.8V
1.8V
2.7V
2.8V
2.8V
2.5V
13.7V
16
pA
720
5V
7.3V
7.4V
5V
0.2V
12V
0.8V
OV
ov
0.7V
0.7V
0.7V
12V
13V
SCHEMATIC
DIAGRAM
TUNER
SECTION
R316L
AM
ANTS - FM
ANTS
EXT
GND
300
,
GND
75
,
FL
SI6.
U
00!
607
4
455
KHZ
TRAP
[1208]
incox2
c2ig
0203
R
0.02
aa
™
AM
DETECTOR
R216
220k
fa)
©
zr,
a
FILTZR
«Qu
oem*
LM703
(
HIGH
INPUT
2
GND
3
LOW
INPUT
4@nc
5
OUTPUT
6
Bt
7
DECOUPLING
@NC
5K
x
CENTRE
METER
JEDEC
IC
101
,IC
102
TO
78
Top
VIEW
R
@4-00!
EPLACE
WITH
HH.S.°4-007
or
A703
_—_——»
4-008
|
DECOUPLING
2NC
3
HIGH
INPUT
4
GND
8
LOW
INPUT
6
NC
7
OUTPUT
6
Bt
17
st
LAMP
12V
40mA
TO
P9ol
at
AEIt
Page 17
rave
our
4
72!
Inout
|
-
L
SCHEMATIC
DIAGRAM
L
REIS
(Spe
nese
ngs
ot
+
13V
AMPLIFIER
SECTION
R316,
R316L
¥
ozoy
yn
nN 0 «
gS
or
oO
4OS!
ers
)2¥0.0
5
4
02%
vou
»
TAPE
OUT
R
219m
R425
ody
viogl
uA
>
pe
47K
ANNO
XdW
7
Elid
OL
a
a
Mle
TAPE|
MON
MODE
C706
.0033
Pen
re
bp
oo
OF
we
rs
=
C707
0033
FILTER
8194
1199
1000
EH
S098
,
o3u341S
ONOW
i
3d0
4d0
80ld0l
+—O®
6
NO
wwored
E
<
Sx
a!
>
YON
10
ZOSA
WwW
EB > =
™
O01
ao
3x,
«
>2
£97001
cd
O22
R624
v8
RE25
{
ne
“L
[33K
470K
=
|cas|caie
0
deggt
(0.0062
(M)
27K
|
cair
|
-
«68
PF
(W200
wibo
Witvo-d
£199
C616
RES! P6IO
TO
FM
PCB
PLi2
4}
|
a
MPS 96
33D
8
©
9
2
=
Mzz
9208
vio
WM
O2Z.
9
!
6osy
@!
a
+
»
4TpF
‘or
U
.
+.6v|
‘6605
|4.6v
=
=
x
(Ww)
47,0
9099)
—
P609
FROM
Pll3.
FROM
Pil4
L
MPX
R
——
42794
GMO
wo
z
Te
NOZS
Maz
eeu
xz
A
oo
K40148
$2
netaLgh
,
MIC
ee
e
eee
ee
eee
@@e
retopecedoety
yess
wy
+26V
IN
0802
T
D803
sto
2005
osvsi
ret
20VAC
RED
+42V
Tcaoe
ZZ
voed
SIGNAL
METER
TRANSFORMER
P/N
35023
S3NOHd
a
ol
werd
v
p
2ovu
10¥
a
2
$
+.04V
p
406465
S30K
slo
+38
R407
R406
=
v
a
3K]
470K
¢404
C406
cos.
pai
et
C906
oo
B
0905
C907
0.01
x
£
c
°o
oe
£
9/00r'1¥F
9088
a
~
Ol
wes
/LY
£089
492
zoey
d
HY
1089
-
0
00220-0082
|
|
(M)
(Mm)
—|
p903
|
O,
K40150
SdWV1 WIG
3adAL
3OCINLYVS
@
Y3NV3dS
|
iW
te
coe
Q,
80
R316/R316L
!
\
ey
SOTES
:
NOTES
out
£2
N
>
z
:
Resistance
in
ohms
+10%
1/4
watt,capacitance
in
microfarads,
unless
otherwise
specified.
N
—_x
pecs
°
03
myx
0807
+1eVv
t
fe}
oa
cCué
Lo
oo
°
N
x ° 2
3
zz
LT
ais
12V
30mA
r
1661.
A66)
dwv1
u3L3N
».
Arrowheads
indicate
main
signal
path.
Fu
Re
Be
aes
o
.
.
.
.
TO
PIO
}
Unless
otherwise
specified,
all
DC
voltages
+15%
measured
with
respect
to
chassis
ground,
OSC
KILL
using
VIVM,
power
line
120V
AC,
300
ohm
external
antenna
terminal
terminated
with
300
ohm
To
Pao
DECK
|
+13
,
resistor,
tuner
off
station
and
input
selector
in
"FM"
position.
AM
voltages
measured
off
AM
RF
B+
YD
IN
s2
V
YaxV3adS
LAMP
RATING
12V
40mA
station
with
selector
in
"AM"
position.
DC
Offset
Voltage
-
With
no
signal
applied,
read
0
volts
+25
mV
at
speaker
A
output
terminal
MAISO
(25
mV
is
1.25
mA
on
triplett
630A
12
mA
scale).
12V
40mA
SV
60mA
POWER
CORD
RECEPTACLE
5,
Bias
current
of
output
transistors
is
measured
as
follows:
Set
VOM
to
12
mA
range.
Measure
current
across
both
0.27
ohm
resistors
on
the
driver
amplifier
board.
Read
1.2
mA
on
triplett
630A
on
12
mA
scale.
Use
same
procedure
tor
other
channel,
Aliow
5
minute
warm-up
before
adjusting
bias,
(See
also
Test
Procedure.)
M2/\
wee
202
BV
6OmA
l2v
40mA
©.
FM
AGC
Voltage
(Front
End
AGC
Terminal)
+.10
to
-2.10V
with
0
to
100K
uV
signal
fed
into
Fé
i.
300
ohm
external
FM
antenna.
330
IN
j
t
iw
7.
The
following
controls
in
the
left
channel
are
mechanically
ganged
with
identical
controls
in
VOLTAGE
SELECTOR
the
right
channel.
BASS,
TREBLE
&
VOLUME
St
£08d
lo
)
\ n v
d0ly
_
\e
«
a
1
po
<
nN
vOSd
~wol
M27!
2%
0
svg
gig
a3
i
2
gre
dS
sa
«
©
MZ
120
JAZ
2Z°O
AEE
W/E
6zey
2189
St
fe
OECK!I
r
8
Rotary
switches
$-l
and
$-2
are
shown
in
maximum counter
clockwise
position
(Position
1).
Positions
are:
AUDIO
AMPLIFIER
TRANSISTOR
LIST
1.
MIC
NO
MODEL
NOS.
R-316/R-316L
3.
FM
4.
AM
Q401,
Q403
.
2...
ee
ee
~~
BC
109
or
28C
1000
K40l4!
5,
AUX
Q402,
Q404
.
.
.
«ee
+
+
MPS
9633
or
BC
109
Q601,
Q602,
Q603,
Q604
.
.
..
.
MPS
9633
or
2SC
1000
Q801,
Q802,
Q811,
Q812.....
.
28C
374
or
BC
521
.
Power
Switch
is
mechanically
ganged
to
speaker
selector
switch.
Q803,
Q809,
Q813,
Q819..
.
.
.
.
2SA
661
or
MPS
AS6
Q804,
QB14.
Lae
MPS
9630
or
28C
372
NOTE:
MODEL
R-316L
0,
‘Indicator
lamp
for
LW
and
MW
in
long
wave
models
are
wired
directly
to
AM
P.C,
board.
Q806,
Q816....
+.
++
+
+
+
MPS
AO6
or
FCS
1860
.
.
p
for
Q805,
Q815
.
MPS
9630
or
2SC
372
Delete
filter
switches
MPX
and
AM.
Add
band
switches
LW
and
MW
shown
1.
Fuses
9808,
818...
2...
.
MPS
9680
or
2A
495
5
”
:
9807,
810,
Q817,
Q820..
.
.
.
.
TIP
31B
or
2SC
1173
on
schematic
diagram,
tuner
section
of
R-316L.
Q901,
Q903,
Q904
. .
.
. «
«
« «
28C
374
or
BC
521
(Front
decks
shown
from
knob
end
and
rear
decks
shown
from
end
opposite
knob.)
Speaker...
..
4 +
+
+ + +
2,0A
Normal
blow
Dial
and
Function
Lamp
.
.
.
.
Suitable
lengths
of
#38
SWG
copper
wire
(0,006
inch,
0.15mm
dia.)
Power
F-l
100-120V
.
.
.
1.5A
Slow
blowing
time
delay
type
ee
eee
ee
ee
+
220-240V
.
6
«
0.754
Slow
blowing
time
delay
type
Time
delay
type
--
2.0A
Pigtail
leads,
wired
internally.
(May
not
be
used
in
all
production
uni
ts)
NOTE:
ALTERNATE
DEVICES
ARE
FOR
USE
IN
THIS
AMPLIFIER
ONLY,
THEY
ARE
NOT
NECESSARILY
APPLICABLE
TO
OTHER
CIRCUITS,
Power
F-2)
,
18
19
Page 18
TAPE
IN/OUT
R70OL
TAPE
OUT
L
TAPE
OUT
R
~
~
a
¢
x
R425
go
c
418
+7V
«(?
="
[es
ve
She
300
ate
S€
100080
6330
jroav
R418
‘]+-68V
4.7K
TAPE
2
TAPE!
IN
IN
NOW
Ooze
096
ay
£9700)
¥
TAPE|
MON
WYON
MODE
ONOW
r
oauais
ot
NI
—
4°
G
0082
(mi
PHONO
r
©
O
O
c7ol
py
j0o8?
Cl)
Oo
FROM
PII3.
L
MPX
FROM
Pli4
R
MPX
PHONO
Lt
©
To
QR
Aux
c702
[0087
Mic
C]
a
gee
eoogeoe
ae
40'On2
8
cS
OLe
288%
ZORNA
»
OO
FM
PCB
Pu2
4198
8198
1199
M22
wy
1000
4
+H13V
IN
+.5V
VR
rez
JS
PEI
wI98
+13V
NO
80ld
OL-+—®
@
MUTE
FROM
PIO3.
FM
AGC
SIGNAL
METER
+13V
IN
owrad
b
470
9099
430
23VAC
XZ
8
aoy
>
©
+
C608
“yy
4tN6
NOzz
298
MLZ
sity
TOR
WidvO
a
£199
9798
4294
g~99
6798
PEIO
LOW
FILTER
C705
SCHEMATIC
DIAGRAM
AMPLIFIER
SECTION
HIGH
FILTER
ft
wy
WOGt
AL¥
100
0
(Ww)
a
e ° © 3 >
100K
K40148
wy
vere
1
+13V
P9906
p907y
2A
100V
x4
,
D902
3
g
8
2
.
o
£
9/0019
9
K40150
+
Ps02
SdAV1
WIG
3dAL
3901NLYVD
R326
NOTES
K40149
|
—s2y
Resistance
in
ohms
+10%
1/4
watt,
capacitance
in
microfarads,
unless
otherwise
specified.
TO
PIIT
FM
RF
B+
s2
DECK
|
39
Arrowhe
indicate
in
signal
pach.
TO
PIO
OSC
KILL
TO
P2I0
AM
RF
B+
ine
120V
AC,
300
ohn
external
antenna
terminal
terminated
with
300
ohm
d
input
selector
in
"FM"
position.
AM
voltages
measured
off
position,
DC
OFfsct
Voltage
-
(25
mV
is
1.25
mA
on
signal
applied,
read
0
t
630A
12
mA
seale),
volts
+25
mV
at
speaker A ouvput
terminal
MAI50
Bias
current
of
output
transistors
is
measured
as
follows:
Set
VOM
to
12
mA
range,
Measure
current
across
both
0.27
ohm
resistors
on
the
driver
amplifier
board.
Read
1.2
mA on
triplett
636A
on
i2
scale,
Use
same
procedure
for
other
channel,
Allow
5
minute
warm-up
before
adjusting
bias.
(See
also
Test
Procedure.)
FM
AGC
Voltage
(Front
End
AGU
Terminal)
+.10
to
-2.10V
with
0
to
100K
y!V
signal
fed
into
300
ohn
external
FM
antenna,
560
The
£
w
the
rig
jlowing
controls
in
the
left
channel
are
mechanically
ganged
with
identical
controls
in
channel.
BASS,
TREBLE
&
VOLUME
Rotary
switches
S-1
and
S-2
are
shown
in
maxisum
counter
clockwise
position
(Position
1).
Positios
are:
QS...
ee
Q404......
Q602,
Q603,
Q604
.
Q802,
Q811,
Q812.
Q809,
Q813,
Q819
.
Q814...
.
Q806,
Q8l6
»
.
.
ww
QS...
ewe
Qb18..
ee
Q810,
Q817,
Q820
.
Q903,
QI04
2...
(Front
decks
shown
from
knob
end
and
rear
decks
shown
from
end
opposite
knob.)
Power
switch
is
mechanically
ganged
to
speaker
selector
switch,
Indicator
lamp
for
LW
and
MW
in
long
wave
models
are
wired
directly
to
AM
P.C.
board.
Fuses
Q90l,
2.5A
Normal
blow
Suitable
lengths
of
#38
SWG
copper
wire
(0.006
inch,
0,15mm
dia.)
100-120V
.
.
.
2.5A
Slow
blowing
time
delay
type
220-240V
.
.
.
1.25A
Slow
blowing
time
delay
type
Time
delay
type
--
3.0A.
Pigtail
leads,
wired
internally.
(May
not
be
used
in
all
production
units)
Speaker
ss
ee
ee
ee
eee
Dial
and
Function
Lamp...
.
Power
Fl
se
see
ee
eee
Power
P26
ee
ee
ee
ee
20
MODEL
NO.
R-326
»
28C
.
MPS
.
MPS
+
28C
2SA
.
FT
.
28C
12v
”
ouT
dan
ua13N
0000
66}
LAMP_RATING
I2V
40mA
40mA
60mA
6OmA
40mA
AUDIO
AMPLIFIER
TRANSISTOR
LIST
1000
BL
or
BC
109
9633
or
BC
109
9633
or
2SC
1000
374
or
BC
521
661
or
MPS
A56
9630
or
2SC
372
AO6
or
FCS
1860
9630
or
2SC
372
9680
or
2SA
495
3055
374
or
BC
521
axe
vwosi
Age
TRANSFORMER
C706
t
02
ino
cTl4
0033
cTis
0033
to
P/N
35025
v
+32v Tran
=O
iP
BO!
ge02
Rao
+29V
Q801
ovo}
-.55V
ZZ
084
MA
150
psoz
Y
0803
D>
100
Vv
OKT
1K
50
z208u
489
oso
cD
0044
Gt
oigy
z
9084
odd
94.
&
seg
80
©
10
6d
2040
co
20
*
cO
cc
O
het
240v
F2
PWR.
FUSE
UNSWITCHED
o
fo
AC
MAIN
Mei
wee
2024
—Iy
a)
pl:
bo2
“eT”
b
a
tf}
-32v
¥psos
v08y
A
98g
MZ
L270
a
M21
O}
£99
0
iZeyu
ores
B08
Or,
3
w-O-
+32V
§
P807
PBOs)
L.]
PLUG
ALL
DIODES
(except
zeners
and
power
rectifiers):
MA
150
or
IN
4148,
NOTE:
ALTERNATE
DEVICES
ARE
FOR
USE
IN
THIS
AMPLIFIER
ONLY,
THEY
ARE
NCT
NECESSARILY
APPLICABLE
TO
OTHER
CIRCUITS.
a
t
3
8
~
«
VOLTAGE
SELECTOR
Re23
arp
!
K
wee
a
B3e
QB!3
66!
0809
0810
5
MA
ISO
«a
i
by
AC
Qsi2
C3T4X
~
.55V
oat
oBI2
MA
150
X2
R326
SANOHd
FS
8
~32V
9zeu
eeey
86!
MZ
O01
49,0
AGE!
vee
21
K40140
©
Lo
2.54
a
@
Y3sxV3dS
ge
vee
Vv
Y3aNV3ads
sl!
@
DICK
|
ey)
Page 19
cc
AM ANT
PL
FM
ANT
EXT
GND
300 GNU
75
Q@201
2m
382308
#1035
cL
YE
Low)
1
I
3 §
°
'
1
1
sECPiP)
C209
220!
[=
0202
>
OR
MA
26WX1
R212
47K
SIGNAL.
[METER
B+
-
FM
AM
-O
LL
f
O
oO
O;O
Oo
O72
FILTER
DC
VOLTAGES
AT
INTEGRATED
CIRCUIT
PINS
N#
Ic101
C102
METER
SIGNAL
VARIABLE
TUNER
SECTION
SEMICONDUCTOR
LIST
R-316,
R-326,
R-336
&
T-526
L
1.4V
2 — 3
1.4V
ov
11.4V
13V
12v
ec
MA
758
1.4V
3.2V
5V
.6V
7.3V
1.4V
(station)
5.2V
7.4V
0.9V
(mute)
ov
pA
720
Q101, Q102,
Q103
.
Q104,
QI0S..
wwe
Ql06.....
ees
Icl0l,
1cl02....
Q2o1
.
a
SV
Sv
11.4V
SV
0.2V
13V
OV
12V
12v
13.7V
0.8V
—_—
ov ov
.5V
(mono)
ov
2.8V
(stereo)
2.8V
0.7V
1.8V
0.7V
2.7V
0.7V
2
2
2
1
Multiplex
IC
.
une
qg02.
.
Lae
e
.8V
12V
.8V
13V
1526/T526L
NOTES
NOTES:
1.
Resistance
in
ohms
+10%
1/4
watt,
capacitance
in
microfarads,
unless
otherwise
specified.
2.
Unless
otherwise
specified,
all
DC
voltages
+15%
measured
with
respect
to
chassis
ground,
using
VIVM,
power
line 120V
AC,
300
ohm
external
antenna
terminal
terminated
with
300
ohm
resistor,
tuner
off
station
and
input
selector
in
"FM"
position.
AM
voltages
measured
off
station
with
selector
in
"AM'
position.
3.
FM
AGC
Voltage
(Front
End
AGC
Terminal)
+.10
to
-2.10V
with
0
to
100K
uV
signal
fed
into
300
ohm
external
FM
antenna.
Rotary Switch
is
shown
in
maximum
counter
clockwise
position
(Position
1).
1.
FM
2.
AM
Positions
are:
Indicator
lamp
for LW
and
MW
in
long
wave
models
are
wired
directly
to
AM
P.C,
board.
Fuses Power
F-l
...-..
100-120V
.
.
0.75A
Normal
blowing
type
220-240V
. .
.
0.37A Normal
blowing
type
0.75A
Pigtail
normal
blowing
type,
wired
internally.
(May
not
be
used
in
all
production
units)
Power
F-3
.
2.2.
ee
ee
Dial
and
Function
Lamp
F-2 and
F-4
.
2.1...
AM
Integrated
Circuit
..
T-526
&
T-526L
ONLY
CS
9016G
or
SE
1001
2S8C
374
or
CS
9014C
2SC
374
or
CS
9014C
LM
703
or
pA
703
2N
3823
or
JF
1033
nA
720
nA
758
or
ULN
2244
2SC
374
or
CS
9013
TIP
31B
or
2SC
1173
Suitable
lengths
of
#38
SWG
copper
wire
(0.006
inch,
0.15mm
dia.)
RIBS
5.6K
SEP
ADJ
4.8V
NOISE
.15V
STAT.
Pra
2
-36V
NOISE
2.5V
STAT.
ULN
2244
OR
VATSE
oi
—_—_—_——
ST
LAMP
l2v
40mA
RECTIFIERS
1A
100V
908
0
902
c
0.047X2
ooric?)
FM
B+
TO
SELECTOR
AM
B+
AM
SELECTOR LAMPS
8V
6OmA
CARTRIDGE
TYPE
DIAL
LAMPS
METER
LAMPS
l2V
30mA
U4
MINI
oP
4
1
nnnn
es
UU
5
8
oem*™
Lm703
|
HIGH
INPUT
2
GND 3 LOW
INPUT
4NC
5
OUTPUT
6
Bt
7
DECOUPLING
@NC
° w «
13.4
ac
sIMivew
IC
101
,Ic
102
TOP
VIEW
REPLACE
WITH
<>
PUSH
SW
P720
PT2t
Wy
gt
x
Vv
Ce
0.015
(mM)
TRANSFORMER
P/N
35030
SELECTOR
©
0047/5Kv
OC
JEDEC
TO
78
aft~
00!
HH.S."4-007
or
yA703
4-008
1
DECOUPLING
2.NC
3
HIGH
INPUT
4
GND
5
LOW
INPUT
6
NC
7
OUTPUT
8
Bt
92G1
‘ON
1S00W
WVYSVIG
DILVWAHOS
Page 20
ve
Gc
Pio!
P102
AM
ANT
FM
ANT
=
ExXTGND
300
GNO
75
GP
PPHF
g
=
=
i
|
1
6
{
m
Cio}
Cie)
Ri33
SEK
e
P2o1
C20!
[@
Q
=e
48
3P
= | a>
mw
au
cyre0e
io,
FERRITE
ANTENNA
LW
"
IF
1
N
|
°
owen
RAIS
pans
~
f
30K
tr
Hot
i
0203
CERAMIC
FILTER
R139
AUDIO
AMP
idk
'
-'
‘C39
002
»
INGO
X2
v
R222
2.2K
oor
AMB+
RF
C227
©
°
104
a a
8
©.
aor
Rae
Fa
ax
ENTER
METER
METER
METER
103
AM
=
Ss
|
107
6
14
28
ral!
ULN
2244
or
UA 756
13
2
2
‘ae
6
we
Ri4t
O1OT
Ie
P108
xy
c
a
Ci37
oO.
Ri4s
(€)
Lior
19KHZ
SO
KHZ
L102
820K
Ri
Ria7
KH
\
lo
mo
04
TM
PIOS
PHO
Y
)
|
£3
g
x
¢
GHD
1
Pil
<O
z
E
-
Pile
OE
-EMPHASIS
Sw
(9KHZ
3OKHZ
cno.
0.
SIGNAL.
METER!
ST
LAMP
12v
40mA
RECTIFIERS
tA
100V
D902
|
>
CENTRE
TUNE
METER
SIGNAL
R907
1oK
4
100K
B
vel
100K
8
vR
at
FIXED
OuT
PUT
R202
™
LY
$
coos
|S
4
a
0.01
(c)
D903
G
VARIABLE
AM
FILTER
FM!
FILTER
OUTPUT
LEVEL
7T526/T526L
NOTES
NOTES:
Resistance
in
ohms
+10%
1/4
watt,
capacitance
in
microfarads,
unless
otherwise
specified.
2,
Unless
otherwise
specified,
all
DC
voltages
+15%
measured
with
respect
to
chassis
ground,
using
VIVM,
power
line
120V
AC,
300
ohm
external
antenna
terminal
terminated
with
300
chm
resistor,
tuner
off
station
and
input
selector
in
"FM"
position.
AM
voltages
measured
off
station
with
selector
in
"AM"
position.
FM
AGC
Voltage
(Front
End
AGC
Terminal)
+,10
to
-2.10V
with
0
to
100K
uV
signal
fed
into
300
ohm
external
FM
antenna.
4,
Rotary
Switch
is
shown
in
maximum
counter
clockwise
position
(Position
1).
1.
FM
2.
AM
Positions
are:
Indicator
lamp
for
LW
and
MW
in
long
wave
models
are
wired
directly
to
AM
P.C.
board.
6.
Fuses
Power
F-l
.
2...
2...
+
100-120V
..
.
0.75A Normal
blowing
type
220-240V
.
.
.
0.37A
Normal
blowing
type
0.75A
Pigtail
normal
blowing
type,
wired
internally.
(ay
not
be
used
in
all
production
units)
PIN#
Dial
and
Function
Lamp
1
F-2 and
F-4
.....,
Suitable
lengths
of
#38
SWG
copper
wire
(0.006
inch,
0.15mm
dia.)
2
Power
F-3
.
2.22
ee
ee
LONG
WAVE
TUNER
SECTION
COIL
IDENTIFICATION
T201
1202
(Yellow)
--
(Orange)
7203
(Red)
--
7204
(Red)
--
1205
--
T206 (Red)
--
1207
(White)
--
7208
(Blue)
--
T209
(Black)
--
1210
--
MW
LW
R.F.
R.F.
MW
OSC.
LW
OSC,
Non
Adj.
R.F.
455
kHz
Trap
I.F.
I.F.
C235
--
C236
C237.
--
LW
R.F,.
Hi
End
Adj.
LW
OSC,
Hi
End
Adj.
LW
R.F.
Hi
End
Adj.
Detector
Whistle
Filter
‘L
TAPE
OuT
TUNER
SECTION
SEMICONDUCTOR
LIST
R-316,
R-326,
R-336
&
T-526
Q101,
Q102,
Ql03
.
Ql04,
Q105
.
Q106
.
Ic10l,
Q201
.
CS
9016G
or
SE
1001
28C 374
or
CS
9014C
2sC 374
or
CS
9014C
LM
703
or
wA
703
eee
2N
3823
or
JF
1033
AM
Integrated
Circuit
nA
720
Multiplex
IC
.
»
.
.
.
pA 758
or
ULN
2244
T-526
&
T-526L
ONLY
Q903,
Q904
.
2sC
374
or
CS
9013
.
eee
TIP
31B
or
2SC
1173
Icl02
.
Q901,
Q902..
DC
VOLTAGES
AT
INTEGRATED
CIRCUIT
PINS
1c101
1.4V
1.4V
1c102
1.4V
1.4V
(station)
0.9V
(mute)
ov
4
11.4V
4.
13V 5 12V
BA
758
+2V
6v
av
UEw
ov
11.4V
13V
12V
1.5V
(mono)
8V
(stereo)
8Vv
FM
B+
Lw—
MW
SWITCH
B+
0.7V
0.7V
0.7V
12v
13V
CARTRIDGE
TYPE
DIAL
LAMPS
SELECTOR
LAMPS
8V
6OmA
METER
LAMPS
12V
30mA
TRANSFORMER
P/N
360380
100V
|
20
8O
0
1060
3040
69
20
4060
60
_
O
2
120
|v
40V
192S1
‘ON
130OW
WVYSVIG
DILVAWSHOS
8V
15OmA
SELECTOR
at
F3
0.
0047/5KV
bod
f
MINI
oIP
4
'
non
UUU
5
8
oeM*
LM703
4
HIGH
INPUT
2
GND 3 LOW
INPUT
4Nc
5
OUTPUT
6
Bt
7
DECOUPLING
eNC
JEDEC
TO
78
Ic1ol
,Ic
102
TOP
View
e)
94-001
HH.S.°4-007
or
yA7O3
4-008
|
DECOUPLING
2c
3
HIGH
INPUT
4
GND
S
LOW
INPUT
6
NC 7 OUTPUT
8
B+
REPLACE
WITH
>
Page 21
—
DIAL
CORD
STRINGING
INSTRUCTIONS
RECEIVERS
Set
tuning
capacitor
plates
"out"
(minimum
capacitance).
Tie
dial
cord
to
pulley
boss
"A".
Wind
one
turn
of
dial
cord
around
tuning
drum
counter-clockwise,
as
viewed
from
rear
of
unit.
Continue
over
pulleys
"B",
"C",
"D",
"E",
"F'
&
"G".
Wind
three
turns
of
dial
cord
around
flywheel
capstan
counter-
clockwise,
when
viewed
from
rear
of
unit.
Continue
to
tuning
drum
and
install
1
3/4
turns
of
dial
cord
around
drum,
counter-clockwise.
Enter
drum
opening
at
point
"H''
and
attach
cord
to
tension
spring
as
shown.
Attach
dial
cord
to
pointer
assembly,
rotate
dial
knob
to
fully
"mesh"
tuning
capacitor
plates
(low
frequency
end
of
dial).
Position
pointer
assembly
on
"0"
log.
Rotate
tuning
knob
in
both
directions
to
check
for
satisfactory
dial
drive
operation,
adjust
tension
as
necessary.
Apply
suitable
cement
to
dial
cord
knots
and
at
dial
pointer
clips.
“(J
Q
H—
—A
()B
xe
_/
Capstan
26
DIAL
CORD
STRINGING
INSTRUCTIONS
T-526
TUNER
Set
tuning
capacitor
plates
"out"
(minimum
capacitance).
Tie
dial
cord
to
pulley
boss
"A",
Install
cord
around
pulleys
"B",
"Cc",
"D',
"E"
&
"EF",
Wind
dial
cord
around
flywheel
capstan
(G)
three
turns
in
a
counter-clockwise
direction.
Continue
over
pulleys
"H'"
and
"J",
Use
care
not
to
bend
tuning
capacitor
plates.
Wind
two
turns
of
dial
cord
around
tuning
drum
(clockwise)
and
tie
to
dial
cord
tension
spring
at
point
"K".
Turn
tuning
knob
counter-clockwise
to
"mesh"
tuning
capacitor
plates.
Set
dial
pointer
to
"0"
log
and
attach
dial
cord
to
pointer.
Check
for
free
operating
dial
drive
with
adequate
cord
tension.
Apply
suitable
cement
to
knots
at
each
end
of
dial
cord,
and
to
cord
where
it
is
clipped
to
the
pointer
assembly.
27
Page 22
RECEIVER
PREAMP
BOARD
NO.
K40150A
POWER
BOARD
NO.
K40140A
ASSY.
NO.
100-1333-037
MODEL
NO.
ASSY.
NO.
R-326
100-1335-022
MODEL
NOS.
R316
R326
R316L
POWER
BOARD
NO.
K40141A
MODEL
NOS.
ASSY.
NO.
RECEIVER
TONE
CONTROL
BOARD
NO.
K40148A
R316,
R316L
100-
1335-023
MODEL
NOS.
ASSY.
NOS.
#
&
R316
R316L
100-1334-031
MAIN
AMP
BD
R326
100-1334-029
LOUD,
FILTER
&
MODE
BOARD
NO.
K40151
FILTER
&
MODE
BOARD
NO.
K40151A
MODEL
NOS.
ASSY.
NOS.
MODEL
NOS.
ASSY.
NO.
R316,
R316L
100-1352-031
T526,
T526L
100-1352-032
R326
100-1352-030
28
29
Page 23
AM
LW
TUNER
BOARD
NO.
K40147-1
MODEL
NOS.
R316L
T526L
POWER
SUPPLY
REGULATOR
BOARD
NO.
K40149
USED
IN
ALL
MODELS
ASSY. NOS.
100-1340-040
R-316
100-1340-038
R-326
100-1340-041
T-526
POWER
SUPPLY.
DEEMPHASIS
BOARD
NO.
K40152
MODEL
NOS.
ASSY.
NOS.
R316,
R326
100-1348-005
T526
100-1348-006
30
Page 24
FM
TUNER
BOARD
NO.
K40145A
MODEL
NOS.
ASSY
NO.
R316,
R316L,
R326,
100-135
1-004
7526,
T526L
AM
TUNER
BOARD
NO.
K40146A
MODEL
NOS.
ASSY
NO.
R316,
R326,
T526
100-135
1-003
31
Page 25
H.H.
SCOTT
PART
NO.
011-1004-031
011-1004
-032
012-1020-004
012-1021-001
012
-1021-004
012-1023
-009
012-1023-011
012-1024
-002
012-1024-014
013
-1031-005
013
-1031-008
013-1031-009
013-1031-011
013-1031-018
013-1031-025
013-1031-030
013-1031-031
013-1031-032
015-1061-014
015-1061-015
016-1092
-037
016-1093-046
016-1093
-049
016-1093-050
016-1093-051
017-1095
-038
017-1095
-039
018-1100-178
018-1100-179
018-1100-180
018-1100-181
018
-1100-183
018-1102
-162
018-1102
-163
018
-1102-165
018-1104-099
018-1105-113
018-1105-114
018-1105-115
020-1110-053
020-1110-054
020-1110-055q
020-1110-056
Filter
Filter
Diode
Diode,
Diode,
Diode,
Diode,
Diode,
Diode,
Fuse,
Fuse,
Fuse,
Fuse,
Fuse,
Fuse,
Fuse,
PARTS
LIST
DESCRIPTION
Capacitor
Capacitor
SI
SI
Zener
zener
Rectifier
Rectifier
Slo-Blo
Slo-Blo
Slo-Blo
Slo-Blo
Fast-Blo
Fast
-Blo
Fast
-Blo
Fuse,
Slo-Blo
Fuse,
Slo-Blo
Jack,
Phone
Jack,
Mic
Inductor
Inductor
Coil,
Multiplex
Coil,
Multiplex
Coil,
AM
Osc.
Meter,
Signal
Meter,
Center
Knob,
Volume
Knob,
Control
Knob,
Push
Button
Knob,
Lever
Knob,
Tuning
Panel,
Front
Panel,
Front
Panel,
Front
Glass
Lens
Dial
Glass
Dial
Glass
Dial
Glass
Transistor
Transistor
Transistor
Transistor
4700/35V
3300/35V
IN
60
MA162,
1N4148,
MA150
CDO000
NC
CD0044
FZD-07
2A
100V
1A
100V
.75A/250V
1.25A/250V
1.50A/125V
2.50A/125V
2.50A/125V
2A/125V
6A/125V
.75A/125V
.375A/250V
2
mH
50
mH
19
kHz
(White)
38
kHz
(Blue)
Red
MPS
9630,
2SC
372
2SC
374
BL,
733
2SA
495,
MPS
9680
2SA
661,
FCS
1861
USAGE
R-326
R-316
All
R-316/326
All
R-316/326
All
R-316/326
T-526
R-316
R-326
R-316
R-326
R-326
R-316
R-326
T-526
T-526
All
R-316/326
All
All
All
All
All
All
R-326/T-526
R-316/326
All
All
All
All
R-316
R-326
T-526
All
R-326
T-526
R-316
R-316/326
All
R-316/326
R-316/326
Page 26
PARTS
LIST
H,H.
SCOTT
PART
NO,
DESCRIPTION
USAGE
020-1110-057
020-1110-058
020-1110-061
020-1110-062
020-1111-051
020-1111-052
020-1112
-008
020-1114-025
020-1114-031
020-1114-032
021-1125-137
021-1125-138
021-1125-139
Transistor
2SC
1166,
FCS
1860
R-316/326
Transistor
2SC
1000
R-316/326
Transistor
FCS
90166
All
Transistor
MPS
9633,
BC
318C
All
Transistor
TIP
31B
All
Transistor
FT
3055
R-326
Transistor
TI
2N
3823
All
Integrated
Circuit
LM
703,
uA
703
All
Integrated
Circuit
uA
720,
MC
1320
All
Integrated
Circuit
uA
758,
ULN
2244N
All
Potentiometer,
Balance
R-316/326
Potentiometer,
Volume
R-326
Potentiometer,
Volume
R-316
021-1125-143
Potentiometer,
Tone
R-316/326
021-1125-145
Potentiometer,
Level
T-526
023-1135-041
Switch,
Slide,
Deemphasis
All
023-1136-013
Switch,
Lever
4P2T
All
023-1137-085
Switch,
Rotary,
Function
R-316/326
023-1137
-086
Switch,
Rotary,
Speaker
R-316/326
023-1137
-087
Switch,
Rotary
T-526
023-1138-056
Switch,
Push
3
Gang
All
024
-1140-077
024-1140-078
024-1140-080
Transformer
Transformer
Transformer
R-316
R-326
T-526
024-1142-021
Coil,
AM,
IFT
Blue
All
024-1142-026
Coil,
AM,
IFT
Black
All
024
-1142-028
Coil,
FM
Discriminator
A
All
024-1142-029
Coil,
FM
Discriminator
B
All
024-1142-030
Coil,
AM,
RF
Yellow
All
024-1142-031
Coil,
AM,
IFT
White
All
024-1144-011
Filter
SFD
455B
All
024-1144-012
Filter,
Ceramic
10.7
MA
All
027-1157-043
Cabinet,
Wood
R-316/326
030-1187
-032
Terminal,
Speaker
R-31L6
/326
030-1187
-033
Terminal,
Ground
Assembly
All
030-1189-032
Lamp,
Lead
Type
8V
60
mA
AlL
030-1189-029
Lamp,
Lead
Type
12V
40
mA
A1L
030-1189-030
Lamp,
Lead
Type
12V
30
mA
All
030-1189-031
Lamp,
Fuse
Type
8v
150
mA
A1L
030-1192-010
Fuse
Holder
All
031-1198-025
Dial
Pointer
Al1L
031-1200-008
Feet,
Rubber
All
032-1251-190
Cabinet,
Steel
T-526
035-1276-014
AM
Antenna
Assembly
AlL
036-1280-004
Handle
T-526
100-1330-038
Front
End
Assembly
FL
516U
All
33
Loading...