Scott R-316 User manual

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

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
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6
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Mic
2.
6
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Recorder
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Signal-to-Noise
Phono
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Mic
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AUX
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Frequency
Response
. .
.
+.
«
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« «
Phono
Response
RIAA
......
»
Phono
Overload
. .
2...
2 2 6
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Max.
Input
Signal
Phono
(IHF)
..
Input
Impedance
Phono
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2.
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Tape
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Cross
Talk
@
1
kHz
@10
kHz
.
1.
2.
sw
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Rated
Harmonic
Distortion
R316
«2
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R32
6
e
e e e
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e
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e
Intermodulation
Distortion
R316.
1
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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

FM
TUNER
SECTION
Usable Sensitivity
Mono
.
2.
6
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Stereo
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1
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0
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tt
50 dB Quieting Sens.
Mono
.
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6
8
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ell
Stereo
.
2.
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Signal-to-noise
@
65
dBf
Mono
.
2.
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Stereo
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Frequency
Response
30-15,000
Hz
Mono
.
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Stereo
.
2.
2.
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Distortion
@
65
dBf
Mono
.
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© © ©
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8
Stereo
.
2.
6
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Alternate
Channel
Selectivity
.
.
2.
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Stereo
Separation
100
Hz
2.
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1,000
Hz
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10
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Hz
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Tuning
Range
.
2.
6
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Deemphasis
(switchable)
.
.
2.
6
6
ee
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°
.
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7.0
ABE
(2.5
BV)
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624
ABE
(18
pV)
«+
»
« »
10
dBE
(3.5
pV)
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36
dBf
(70
wv)
Pe
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87.
5-
108.
MHZ
25,
50
&
75
pS
Tuning
Indicators
.
.....
+...
..
.
Meter,
Signal
Strength
&
Center
Tune*
Interstation
Muting
. 2.
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2 « ©
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Stereo
Threshold
......-«
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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
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Selectivity
. .
1.
2. 2 1
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Signal-to-noise
Ratio
.
2...
6.
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Total
Harmonic
Distortion
(40%
modulation)
...
Tuning
Indicator
. .
1.
2 2 6
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Antenna
.
2.
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Tuning
Range
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2.
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Long
Wave
Tuning
Range
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6
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*signal
strength
meter
only,
in
Model
R316
ce
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200
pV/m
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3D
GB
min.
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650
CB
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Built-in
Ferrite
Loopstick
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535
kHz-1605
kHz
ce
ee
150
kHz-350
kHz

GENERAL
SPECIFICATIONS
Power
Line
Requirement
120
Volts,
60
Hz
Power
Consumption
R316...
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tlt
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Watt
min.
205
Watts
max.
R326
. 2
6
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628
Watts
min.
270
Watts
max,
Dimensions «.« « « © © «© «© « © © © © © © ew ew ew) 618 «67/16 x 15 3/16 x 5 5/8 inches .
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X
390
X
142
om,
Weight
R316
we
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2545
lbs.»
2
11.6
keg.
R326
2
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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
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«se
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ee
we
10,000
ohms
Adjustable
Output
.
2. 2.
6
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2 ©
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tw
Approx.
10,000
ohms
Output
Level
Tape
Output
and
Fixed
Output...
.....
++...
es
0.5
Volts
@
400
Hz
Adjustable
Output
.
.
2.
6 ©
©
© © ©
©
© © © ©
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@
ew
O
-
O.5
Volts
G@
400
Hz
GENERAL
SPECIFICATIONS
Power
Line
Requirement
.
..
2.
« e
¢
«
«©
© ©
©
© ©
©
© @
«©
«
120
Volts,
60
Hz
Power
Consumption
. .
2. 26 «
« ©
«©
©
» © © © ©
©
©
©
© © © ©
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e)615
UWWatts
Dimensions
....
s+
2»
©
© ©
©
«©
© © @
© ©
w)6
615
3/4
x
13
3/4
x
5
5/8
inches
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tlw
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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
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61LO0V*~,
120V,
220V,
or
240V
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ox
60
Hertz

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,

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.

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

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

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.

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"

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

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.

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.

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

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

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
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0.02
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DETECTOR
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3
LOW
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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
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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
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N
x ° 2 3
zz
LT
ais
12V
30mA
r
1661.
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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
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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

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9
K40150
+
Ps02
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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
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Q801
ovo}
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084
MA
150
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100
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80
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het
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ores
B08
Or,
3
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+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
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QB!3
66!
0809
0810
5
MA ISO «a
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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
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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

ve
Gc
Pio!
P102
AM
ANT
FM
ANT
=
ExXTGND
300
GNO
75
GP
PPHF
g =
=
i
|
1
6
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m
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e
P2o1
C20!
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au
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FERRITE
ANTENNA
LW
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IF
1
N
|
°
owen
RAIS
pans
~
f
30K
tr
Hot i
0203
CERAMIC FILTER
R139
AUDIO
AMP
idk
'
-'
‘C39
002
»
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X2
v
R222
2.2K
oor
AMB+
RF
C227
© °
104
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8
©.
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Rae
Fa
ax
ENTER
METER
METER
METER
103
AM
=
Ss
| 107
6
14
28
ral!
ULN
2244
or
UA 756
13
2
2
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we
Ri4t
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P108
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a
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(€)
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-
Pile
OE
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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
>