Tensai TR-1030 User manual

SERVICE
MANUAL
TENSAI
INTERNATIONAL
HI-Fl
STEREO
RECEIVER
MODEL
TR-
1030

CONTENTS
SPECIFICATIONS
GENERAL
TROUBLESHOOTING
CHART
DIAL
CORD
STRINGING
FM
ALIGNMENT
PROCEDURE
AM
ALIGNMENT
PROCEDURE
PROTECTION
CIRCUIT
TRANSISTOR
VIEW
DESCRIPTION
OF
EXPLODED
EXPLODED
VIEW
SCHEMATIC
DIAGRAM
BLOCK
DIAGRAM
P.C.
BORD
AND
PARTS
LIST
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SPECIFICATIONS
Amplifier
section
Continuous
power
output
at
1KHz
both
channels
driven
T.H.D.
at
1W
at
rated
output
Power
bandwidth
Frequency
response
Damping
factor
Input
sensitivty
Cross
talk
S/N
ratio
(Unweighted)
Input
overload
Tone
control
Loudness
Filter
Program
AM,
FM,
MPX
AM
reception
a
sea
|
_
FM
section
4
ohms
2x35W
'
Useable
sensitivity
1.6UV
8
ohms
2x
25W
Tuning
range
87.5—109MHz
oY
:
T.H.D.
Mono
0.2%
eee
ae
Stereo
0.4%
S/N
ratio
Mono
60dB
10-50000
Hz
Stereo
55dB
50
Image
rejection
80dB
Phono
2.5mV
1.F.
rejection
90dB
Mic
2.5mV
AM
suppression
55dB
Aux
160mV
Intermodulation
80dB
Tape
160mV
Spurious
response
80dB
1KHz
60dB
Muting
level
SUV
10KHz
40dB
Frequency
response
20—15000Hz
.
Phono
70dB
19
KHz
rejection
50dB
Mic
65dB
38
KHz
rejection
60dB
Aux
85dB
Stereo
separation
45dB
120mV
fee
AM
section
nate
+10d8
Tuning
range
MW
:
525—1650
KHz
baer
eae
fe
LW
:
130—365
KHz
aie
nn
Useable
sensitivity
a
Zn
Low
708
T.H.D.
MW
:
ca
|
LW
:15
%
S/N
ration
MW
:
45dB
LW
:
40d8
1.F.
rejection
MW
:
40dB
,
LW
:
30dB
AGC
figure
of
merit
MW
:
60dB
LW
:
60dB
Frequency
response
MW
:
100—2500Hz
GENERAL
TROUBLESHOOTING
CHART
If
the
set
is
otherwise
operating
satisfactorily,
the
more
common
causes
of
trouble
may
be
generally
attributed
to
the
following:
1.
2.
Incorrect
connections
or
loose
terminal
contact
player,
tape
recorder,
antenna
and
line
cord.
Improper
operation.
Before
operating
any
au
instructions.
LW
:
100—2500Hz
5s,
Check
the
connections
of
speaker,
record
dio
component,
be
sure
to
read
the
manufacturer’s
Improper
location
of
audio
components.
The
proper
positioning
of
components,
such
as
speakers
and
turntable,
_
Defective
audio
components.
and
what
to
do
about
them.
Symption
4.
Constant
or
intermittent
noise
heard
at
times
Or
in
a
certain
area
2.
The
needle
of
the
signal
and
tuning
meter
does
not
move
sharply
3.
The
zero
point
of
the
meter
diverges
much
1.Noise
heard
at
a
particular
time
of
a
day
in
a
certain
area
of
any
part
of
dial
2.
High-frequency
noise
3.
Broadcasting
interference
is
vital
to
stereo.
The
followings
are
some
other
common
causes
of
mainfunction
Probable
Cause
1.Discharge
or
oscillation
caused
by
electrical
appliances,
such
as
flourescent
jamp,
TV
set,
D.C.
motor
rectifier
or
Oscillator
2.Natural
phenomena
such
as
atmospheric
static
or
thunderbolts
3.Insufficient
antenna
input
due
to
ferroconcrete
wall
or
long
distance
from
the
station
4.Wave
interference
from
other
electrical
appliances
1.The
set
is
located
in
a
weak
signal
area
2.Some
FM
or
TV
broadcasting
station
is
near
at
hand
1.Regional
difference
in
field
intensity
1.Due
to
the
nature
of
AM
broadcasts
1.
Adjacent
channel
interference
or
beat
interference
2.TV
set
tog
close
to
audio
system
1.Antenna’s
input
sensitivity
is
too
strong
What
to
do
1.Attach
a
noise
limiter
to
the
electrical
appliances
causing
the
noise,
or
attach
it
to
the
amplifiers
power
sources
2.{nstall
an
outdoor
antenna
and
ground
the
set
to
raise
the
signal-to-noise
ratio
3.Reverse
the
power
cord
plug
receptacle
connections
4.1f
the
noise
occurs
at
a
certain
frequency,
attach
a
wave
trap
to
the
antenna
input
5.Keep
the
set
at
a
proper
distance
from
other
electrical
appliances
1.Place
the
set
to
receive
maximum
signal
strength
2.Ground
the
set
to
the
earth
1.The
unit
is
not
at
fault
a
1.In
some
cases,
the
noise
can
be
eliminated
by
grounding
the
set
or
reversing
the
power
cord
plug-receptacie
connections
1.Although
such
noise
cannot
be
eliminated
by
the
set,
it
is
advisable
to
adjust
the
TREBLE
control
from
midpoint
to
left
and
switch
on
the
HIGH
FILTER
2.Keep
the
TV
set
at
a
proper
distance
from
the
audio
system
1.Connect
resistor
(1K-10K)
in
series
to
antenna
terminal.
wohl
=
ht
ete
a
ee
eg
ee
Se
Se
eee
roams
itiege
SHE
SH
SRA
IAL
Sees.
Chet
S833
SLO
SS
SB
UR
EDIE
hl
SSE
SES
AG
IS
TEST
SSG
BTEM
SSS
SE
EEA
ESR
ALAA
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ERE
AENEAN
SEE
IEEE
IEEE
ERG
TAB
AEEN
GREE
EEGAEEEE
EENE
LRS
EER
LOTE
ABBE
EDIE
SLES
BLE
REIT

4
sb
2
one
MeN
Probable
Cause
What
to
do
Program
Symptom
EM
1.Noisy
-1.Poor
noise
limiting
effect
or
too
1.Install
the
antenna
for
maximum
signal
reception
low
S/N
ratio
due
to
insufficient
strength
,
2.1f
this
does
not
prove
effective,
use
an
antenna
input
Sie
ee
a
en
ee
Outdoor
antenna
designed
exclusively
Note:
FM
reception
is\affected
considerably
by
trarismission
condition
of
station
power
and
antenna
efficiency.
As
a
result,
you
may
receive
one
station
quite
well
while
receiving
another
station
poorly
2.Noise
heard
like
scratch
3.
Tuning
noise
between
stations
FM/MPX
4.
Noise
heard
during
:
&M/MPxX
reception
while
not
heard
during
FM
mono
reception
2.Clearness
of
channel
separation
is
decreased
during
reception.
1.The
stereo
indicator
blinks
on
and
off
Record
4.
Hum
or
howling
playing
or
tape
playback
2.Surface
noise
All
stereo
BALANCE
control
is
not
at
programs
midpoint
when
equal
sou
nd
comes
from
left
and
right
>
channels
DIAL
CORD
STRINGING
1.1gnition
noise
caused
by
starting
of
an
automobile
engine
1.This
results
from
the
nature
of
the
FM
reception.
As
the
station
signal
becomes
weak,
the
noise
limiter
effect
is
decreased
and
the
amplification
of
the
limiter,
in
turn,
is
enlarged
generating
noise
©
1.Weaker
signal
because
the
service
area
of
the
FM/MPX
broadcast
is
only
half
that
of
the
FM
mono
broadcast
1.Excess
heat
of
IC
.
1.Interference
2.Too
weak
RF
signal
1.Record
player
placed
too
close
to
speaker
2.Wire
other
than
shielded
wire
used
3.Loose
terminal
contact
‘4.Shielded
wire
too
close
to
line
cord,
tlorescent
lamp
or
other
electrical
appliances
5.Nearby
amateur
radio
station
Or
TV
transmission
antenna
1.Worn
or
old
record
2.Worn
needle
3.Needle
dusty
4.Improper
needle
pressure
It
is
important
to
adjust
for
equal
sound
comes
from
both
channels.
It
should
not
always
be
set
to
the
midpoint
for
FM.
When
you
use
a
TV
antenna
for
both
TV
and
FM
with
a
divider,make
sure
TV
reception
is
not
affected
—3.An
exclusively
long
antenna
may
cause
noise
1.Install
the
antenna
and
its
lead-in
wire
in
proper
distance
from
the
road
or
raise
the
antenna
input
as
described
above
1.Turn
the
MUTING
switch
on.
It
reduces
the
sensitivity,
and
therefore
it
should
be
used
sparingly
1.Install
the
antenna
for
maximum
antenna
input
|
2.Switch
on
the
high
filter
and/or
turn
the
TREBLE
control
from
midpoint
to
left
~
4.Circulation
of
air
is
important
to
the
set.
Be
sure
that-air
is
flowing
under
the
set
2.Operating
after
rest
some
time
~
1.The
indicator
is
not
at
fault,
adjust
VR
101
1.Place
a
cushion
between
the
player
and
the
speaker
or
place
them
away
from
each
other
2.The
connecting
shielded
wire
should
be
short
as
possible
:
3.Switch
on
the
LOW
FILTER
and
adjust
the
BASS
cantrol
from
midpoint
to
left
4.Consult
the
nearest
Radio
Regulatory
Bureau
1.Recondition
the
playback
head
of
the
tape
recorder
or
the
needle,
the
record
player
2.Adjust
the
TREBLE
control
from
midpoint
3.HIGH
FILTER
on
Set
the
MODE
switch
to
mono
and
then
set
the
BALANCE
control
to
a
position
where
equal
sound
comes
from
both
channels
past ssid
acl
aca
ena
ee
SS
SES
can
PSR
AUER
SOEs
So
RT
eee
Se
ee
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}

FM
ALIGNMENT
PROCEDURE
Step
Align
Generator
-
Dial
Setting
Adjust
Adjust
for
poi
ete
ee
ee
ee
1.
IF
Front
end
IF
Maximum
noise
output
2.
Discriminator
1)
Sweep
generator
FM
detector
1101
Maximum
S
curve
2)
98MHz
400Hz
top
&
bottom
core
40KHz
deviation
98M
Hz
T101
Center
meter
Center
position
Top
core
T
101
Minimum
distortion
Front
End
IF
Minimum
distortion
i
ca
OSC
88M
Hz
400Hz
88MHz
Front
End
Lo
Maximum
40K
Hz
deviation
sis
eg
a
i
a
4.
csc
108MHz
400Hz
108MHz
Front
End
Tco
Maximum
40K
Hz
deviation
#
re
LL
-
5.
Reiterate
3&4
|
Fae
ego
a
Ih
ti
a
6.
High-frequency
9OMHz
400Hz
90MHz
Front
End
Maximum
Amp.
circuit
40KHz
deviation
LRI,LR2,
LA
a
a
eae
ee
7.
High-frequency
106MHz
400Hz
106MHz
Front
End
Maximum
Amp.
circuit
40K
HZ
deviation
TCR1,
TCR2,
TCA
eR
TA
TOT
A
8.
Reiterate
6
&
7
9.
FM
stereo
lamp
VR
101
19KHz
setting
with
counter
connected
to
P123
10.
Stereo
separation
98MHz
400Hz
98MHz
VR102
Maximum
output
difference
40K
Hz
deviation
between
P119,P120
output
from
L
output
and
that
from
R
output
of
SSG
nS
connect
the
output
of
FM
SSG
to
antenna
terminal
of
75
ohms
for
feeding
signal
and
Note:
To
align,
he
FM
output
P119
in
P120
to
VT
VM
and
oscilloscope
for
output
indication.
connect
t
AM
ALIGNMENT
PROCEDURE
Step
Align
|
SSG
Dial
Setting
Adjust
Adjust
tor
te
Fr
455KHz
+
30KHz
1FT1
TOO3
Best
IF
Curve
IF
T2
TO04
Maximum
2.
OSC
535KHz
535KHz
OSC
TO002
~
Maximum
Tuning
400Hz
30%
modulation
:
Oe
3.
Osc
1600KHz
1600KHz
OSC
Trimmer
Maximum
Tuning
|
400Hz
Front
end
AM
30%
modulation
nnn
nn
ne
UEEEEIEIIEnEI
UII
IIE
EEE
NEESER
4.
Reiterate2&3
en
5.
RF
AMP
600KHz
600KHz
RF
coil
TOO1
Maximum
Tuning
|
400Hz
30%
modulation
6.
External
600KHz
A00KHz
AM
External
Maximum
Tuning
Bar
Ant.
Bar
Ant.
sp
eh
a
es
igs
Est
ste
a
7.
Antenna
1400KHz
1400KHz
Front
end
Maximum
Tuning
Circuit
400Hz
30%
modulation
I
St
I
i
a
ee
Note:
To
align,
connect
AM
S.S.G.
to
AM
antenna
terminal
for
feeding
signal
and
connect
|
oscilloscope
and
VT
VM
to
POQO2
output
indicating.
Bist
centh
strwectd
warn
SL
Sit
EA
te
RN
OBIS
AR
RIE
Be
I
cs
i
4
i

i
et
RN
PROTECTION
CIRCUIT
x
Current
Limiter
““L’’
This
circuit
is
designed
to
protect
the
speaker
and
power
transistor
from.
damage
when
the
over
current
is
flowed
to
_
power
transistor
by
shorting
the
output
or
overload.
lf
the
over
current
to
R551,
R552
and
the
voltage
drop
across
the
resistors
more
than
turn
on
voltage
of
Q506
and
Q508
then
these
transistors
are
turned
On
and
the
input
of
Q504,
Q509
is
shunted.
Hence
this
circuit
protects
the
power
transistor
and
speaker
from
damage
by
limiting
the
over
current.
TRANSISTOR
VIEW
Q
O
WY)
2SK
30
a8)
:
ria)
=
O
|
Ai
:
Yo
M2
G}
2SA
777
a2
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C
1509
CT
C
734
A
794
28D
586
A
841
B616
A
561
C
381
C
371
'
i
:
DESCRIPTION
OF
EXPLODED
VIEW
|
Ref.
No.
Parts
Name
Part
No.
Ref.
No.|
Parts
Name
|
PartNo
|
1)
Knob
for
Power,
Speakers
and
Felt
22-524
80-426
26)
Dial
Pulley
60-022
i
2)
Handle
38-001
27)
Front
End
3)
Knob
for
Selector
and
Felt
22-524,
80-426
28)
Tuning
Mechanism
Ass'y
60-902
4)
Knob
for
Tuning
22-527
29)
Master
Chassis
11-007
‘
5)
Front
Panel
20-021
30)
Dial
Roller
B.K.T.
32-045
6)
Felt
for
Lever
and
Push
80-428
31)
Dial
Roller
60-101
7)
Bezel
for
Push
40-204
32)
B.KK.T.
for
Support
32-098
8)
Dial
Lens
40-204
33)
Steel
Cabinet
21-505
9)
Dial
Scale
and
B.K.T.
40-109,
32-047
34)
35)
|
Elect.Cap.4700UF
/35WV
10)
Acry!
Reflector
40-214
36)
B.K.T.
for
Heat
Sink
32-005
11)
Lamp
House
30-013
37)
Heat
Sin’:
80-309
12)
Meter
for
Signal
and
Tuning
51-818,
51-817
38)
Power
Transformer
72-006
13)
Lamp
.
51-705
39)
P.C.B
14)
L.E.D.
and
L.E.D.
Socket
51-708,
70-502
40)
AC
Cora:
60-301,
40-503
15)
Power
and
Speaker
SW
52-306-30
41)
DE-EMP.
SW
52-101
16)
B.K.T.for
Lever
32-087
42)
RCA
Connector
4p
and
8p
51-201,
51-207
17)
Mic
Jack
51-401
43)
Back
Chassis
12-021
18)
Selector
SW
52-318
44)
System
Ground
51-902
19)
Front
Chassis.
10-019
45)
Din
Connector
51-301
20).
B.K.T.
for
Mic
Jack
32-086
46)
Speaker
Terminal
51-001
21)
P.C.B
47)
Antenna
Terminal
|
51-102
22)
Dial
Pointer
606-202
48)
AM
Antenna
Ass’y
)
72-416,
40-601
23)
Dial
Cord
49)
Fuse
Holder
and
Fuse
|
50-401
24)
Rubber
Foot
40-301
25)
Bottom
Cover
13-022

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R556
68kK(2+5%
“AW
2B
Q512
|
28C
732
2B
R519
12082
"
1C
R560
|
15K02+5%
“~W
1A
Q513.
|
2SA777
28
R520
O.27S22.5%
2W
1D
R561
27082
5%
“YW
ak
Q514
2SC
1509
1A
R521
|
02782”
K
|
C501
|
470PF
2c
|
@515
|
28D
586
1A
R522
27082
"
2D
C502
0.47LF
/50WV
2c
Q516
2SC
734
TA.
R523°
|
3.382
x
2D
C503
1UF/5OWV
zc:
|
'O5%7
2SC
828
1AB
P5948
i
2D
C504
10LF
10WV
2D
|
Q518
|
2SA
561
2B
R525
|
1K62
+
5%
“ZW
2B
C506
39PF
2D
«|
G5IG.
fh
OSK-777
1B.
R526
BSL.
na
2A
C507
22UF
35WV
2C
Q520
2SB
616
1B
R6I7.
|
27KSes
2B
C508
|
«0.047uF
ores
oy
R528
|
15Kk2e
6
2B
C509
1UF
50WV
2B
=|
=L501
2.7KH
Choke
2D
P60
%
|
SOK
S
2,
foe
2K
C510
AT7OPF
2B
L502
2.7UH
Choke
2A
R530.
1
15KoL
2A
C511
0.47UF
50WV
2B
Reet
arOKse
2B
C512
10UF
10WV
FS
D501
MZ11B
Tener
2BC
R532
68082
ef
TAS.
C514
39PF
oA
D502
MA150
2A
R533.
|
47002.
1B
C515.
|
22uF
35WV
2B
D503.
=|
MA150
2C
R534.
|
68082”
1B
C516
|
0.04
7uF
2A
D504.
—-|
MA150
2B
|
R535.
«|
1.5KS2
p18
C517.
|
0.02"F
1¢
=|
D505
|
MA150
2D.
Symbol
Description
Location
a
R403
3.3KN
+5%
4W
1B
R404
3.9KQ
.
1B
R405
|
47KQ
1A
R406
56K
1B
R407
2.2KQ
1A
R408
220K
1A
R409
|
82K
1B
R411
3.3K
-
1A
R412
220K.
.
1A
R413
10KQ
2B
R414
2200
1B
R415
|
1KQ
2B
R440
1.5KQ
1A
C405
G.0047
uF
1B
C406
100uF
16WV
1B
C407
|
100P
~
1B
C408
100uF
1OWV
1A
c409
4.7
uF
16WV
1A
Q401
2SC
1681
|
1B
Q402
2SC
732
|
1A
D401
1N4149
1B
D402
1N4149
1B
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