Tandberg TPT-3001 Service manual
TANDBERG'
Programable
Circuit
Alignment
DiagraTs
Instructions
FM Tuner
3001
and
TANDBERG'-
The
European
Alternative
Contents
\
'
i Main
I
Mechanical
Electrical
Power
Oscillatorandfrontend..
Limiter/DetectorbelowserialNo.00T00
Limiter/DetectoraboveserialNo.00T00
Selectivity below
Selectivity
Signaimeter,mutinglevel
Tuningsystem
Tuningsystem2....
Stereodecoder
Integratedcircuits
OtherPCboards
Modifications...
Technicaldata.
service 3
service
circuit
diagram
supply and dial
serial
above serial
1....
pointer
No.
No.
adjustments
00700 . . . . 16
00700
. .
. 8
Page
6
7
.... 10
........ 12
.......
.......2+
........26
.......28
........34
......35
........36
14
. . . 18
....20
.,..32
E
1.0
1.1 Dismantling
Mechanical
service
O Top
O
Top
O Rear
cover,
cover, front
panel
rear (1).
(3).
(2).
N
O Front
O
Bottom
panel (4).
(5).
cover
Remove
rotary
knobs.
Figure
Dismantling
1
the rear
and top coaers
I
t,
-l
i
2
lFisure
t-
i
I
Dismantling
the
front
and
bottom
couers
1.2
Dial
cord
drive
A
I
1/
Figure
1.3
cord
Dial
3
Replacing
driue
battery
in
the
tuning
memory
circuit
il
I
Ordering
No'
376731
memorY
The
intemal
not
is
data
switched
batterv
The
chaised
is
and
receivei
the
Under
will
normal
have
is
batterY
losi
off.
the
is
is switched
life
a
that
10
bY
the
receiver
the
tYPe,
off'
the
Years'
Powered
so
when
NiCd
continuouslY
conditions
of
an
storeo
1'4
when
battery
is
t
V,
Figure
4
The
tuning
circuit
t
battery
1.4 Mounting
:=--
side
\,.,t
panels
and the
19"-rack
mount kit
(25
mm)
-r*f'"'--i
NOTE!
When
must
are
Take
originally
panels
if you
The
without
because
inside
Snril'(J
I
I
I
(16
mm)
B
fitting
use
supplied.
care of
remove the extra
long
the
extra
side
the long
used to
because
screws
the
they will cause damage
receiver.
the
you
must
extra
screws
short
hold
will need them
side
panels you
(A)
which
screws
the
not
panels
(B)
side
side panels.
be used
Figure
5 Mounting
the
side
panels
(extra)
S
$r
Figure
6 Mounting
the 19"-rach
,nount hit (extra)
H
2.0
Electrical
service
Tandberg Programable Tuner
professional
difficult
consequently
and
need an utmost
quality test
In
case of
NEVER TOUCH trimming components
know
For alignment of distortion
generators
the
lower than
the channel separation
and
should be
tuner.
to measure
equipment.
malfunction
for
sure they
1/5
14
Some
with
most
the
accurate alignment
we
need adjustment.
own distortion
TPT
of the
higher
dB
to
20
TPT 3001 is a
of its
specifications
standard
will therefore
3001
test equipment
critical
and channel separation
of
circuits will
demanding
figure should
distortion
equipment
the
that of the
than
TPT 3001.
For
a
follow
in this
'I
I.
2.
J.
4.
5.
6.
7.
8.
complete
procedure in
the
book:
Chapter
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
2.10
2.tr
alignment
Procedure
Power
Oscillator
Limiter/detector below
Limiter/detector
Selectivity below
Selectivity above
Signal
Tuning
Tuning
Stereo
we recommend
order as described
same
the
supply and dial pointer
front
and
end
above serial
serial
serial
meter
system
system
and
1
2
Muting
decoder
are
advise
unless
be
figures
you to
serial
No.
00700
No.
00700
level
high
you:
you
No.
No.
00700
00700
Page
10
T2
T4
16
18
20
24
26
30
-\
8
a
For
further
information, contact
our representative.
3
2.1
Main
circuit
Printed
diagram
circuit
with connections.
boards
adjustment,
and
see
pages
20 through
23
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10
Power
supply
$rt'*'#
board, component side
Power
Check operating voltages at connectorJS0l:
Pl:
5 v (5.2 v)
P2:
P3:
P4:
P5:
P6:
v (5.2 v)
5
15.0 V, adjust with
40v
V
25.0
ground
adjust
,
terminal.
with R8 1
R823
1
wirh
with
Rt311
R823
pointer
Dial
O
Connect
figure
O
3
Figure
(varicap-voltages)
voltmeter
1 1
).
11 Dial
pointer
to
J705
R784-g
adjustment
(main
E
board,
see
O Tum
is in its physical extreme
I
F
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&
pointer
Adjust
O
O Tum
meter. The pointer
90
Tuning
the
at the low
R784 for
the Tuning knob
MHz
mark
on
knob
until the
posilion
frequency
3.0 V
on the voltmeter.
for
4.0 V on the
should then be
dial. If
the
tuning
pot.meter
with the dial
end of the dial.
volt-
at the
necessary,
adjust
the pointer position.
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301
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301AN
WITH A DOT
ARE MET.
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108 CRl09
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a,
Front end board,
14
component
side
.,,,r1
tt n.l;}it*ii
Oscillator
O Conne ct
0.5 mV/75
O Connect
FM-Multipath
tuner.
O Set
O
90
105 MIJz,
The
the
O
The
trical
signal generator
oscilloscope (a.c.-mode)
Bandwidth
the
MI{2,
adjust Li05.
adjust
cover must be
oscillator adjustment.
center
sinewave on
ohms,
frequency
t
Vert.
selector to Narrow.
Cl14.
on the
the
to the antenna terminal,
kHz
75
output
dev.
at the
Front
indicated
is
oscilloscope
End
to the
rear of
box during
by
a symme-
(figure 15).
the
Figure
15 Symmetrical
sinewaue
Front End
O
Connect signal generator
0.5 mVi 75 ohms,
O
Connect oscilloscope (d.c.-mode)
FM-Multipath
O Adjust
During
to max.
the adjustment
Vert.
d.c. level on the
maximum, then very
until no
90
105 MHz:
further
maximum is obtainable.
MHz: L101,
Ll11,
C102,
L107, L108,
Ll06 (osc.
C129, Cl33,
CI44, C124
To
obtain a
adjustment with
(105
MHz) in
symmetrical curve,
Ll05
the oscillator
to the antenna terminal,
t
kHz
75
dev.
output.
the curve
slowly sink again.
(osc.
(90 MHz)
circuit.
to the
oscilloscope.
go to
will
Adjust
L109, Ll10,
amplitude).
C134, CI43,
amplitude).
make a
final
and Cl14
a
2.4
FROM
J 202
Limiter/Detector
c 302
22n
below serial No. 00700
o 301
BF
o
BF
I99
302
I99
c 303
22p
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ol
3l
22p
cR 304
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oa
oo
cl
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L 301
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ll
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Figure
Limiterldetector
16
belou
serial No.
F
(9
z.
t!
F
v)
o
UJ
L
00700
c322
22n
I
N
('
2
uJ
v
F
a
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