Alignment Instructions - Saba R 109 Serviceanleitung

Abgleichanleitung
Abgleich des FM-Tuners
l) Voltmeter an Punkt 9 (+) und Masse leqen.
2) Bei IOS MHz (Empfängerabstimmuna
Rechtsanschlag) mit P 63 so einstellen,
zwischen Punkt 9 (+) u. Masse 20 V stehen.
3) Bei 87 MHz (Empfängerabstimmunq
Linksanschlag) mit P 62 so einstellen, daß
zwischen Punkt 9 (+) u. Masse
4) Bei 95 MHz mit P 60 so einstellen, daß
zwischen Punkt 9 (+) u. Masse
5) Erforderlichenfalls 2) — 4) wiederholen.
UKW-Me3sender an Buchse 20/4 und 20/8 bei ge-
- 8 (Einschubschalter)
drückter Taste E 1
schließen. Batterl espannung über Buchse 20/6
und 20/7 zuführen.
la) Bei 90 MHz L 21 (Osz.) L 18 und L 16 auf
Maximum abgleichen.
1b) Bei 101 MHz C 43 (Osz.) C 38 und C 23,
auf Maximum am RVM abgleichen.
lc) Erforderlichenfalls la) und 1b) Wiederholen.
ld) Bei 95 MHz mit P 60 Eichunq gegebenenfalls
korriqieren.
Rl+R2:80A
15p
Meßsender
SIGNAL G ENERATO R I
Fig. 1
FM-Tuner
@L16
c 23
LIB
I @L23
L21
@L24
023/4
Transa11/VSO 798
p 59
Mit P 59 werden Transistor-Toleranzen
glichen. Braucht normalerweise
stellt werden.
p 59
Compensation of transistor-tolerances.
p 59
Compensation des tolérance de transistors.
4
Alignment
Steady Current Adjustment
The adjustment should
battery voltage Of 7 volts w i t h 0 u t any in-
auf
put signal, with the volume control turned down.
daß
auf
Only the EIN-AUS ON-OFF) button should be
pressed. Take out
V stehen.
connect ampere-meter.
V stehen
AM-alignment
a) Connect V'TVM to test points D and M.
b) Adjust RF Signal so that the VTVM reads
an-
about 0,15 volts.
IF Alignment 460 Kc
a) only the EIN-AUS
be pressed.
b) Connect signal
modulated, through
C 151/1' 8 (T 151-AF 121).
c) Detune IF trap with L 131.
Importantl The coupling
is decreased by turning
ter-clockwise and increased
wise.
IF Transformator VI
Adjust circuit to maximum with L m4/Ü.
IF Transformer II
Adjust IF trap to minimum with L 6187.
Transformer V
IF
C2 1
Adjust coupling subcritically with K 183/184.
1)
sop I
2) Adjust both circuits
to maximum.
Adjust coupling critically with K 1æ/184
3)
(maximum output voltage).
If necessary repeat 1) — 3).
4)
IF Transformer IV
1) Adjust coupling
2) Adjust both circuits
to maximum.
3) Adjust coupling critically with K 163/164
(maximum output
If necessary, repeat 1) — 3).
4)
Set coupling with
5)
thus decreasing
100/0.
IF Trap, 460 Kc
Adjust IF trap to minimum with L 131.
Alignment of Oscillator
Check: with pointer
exactly on the corresponding
The rotor Of the
flush in the stator.
loosely to the ferrite
z ferrite rod with spool
1) Press button L. At
(Osc.) and L 106/7 (ant.) to maximum.
Press button M. At 570 Kc adjust L 236/7
(osc.) and L 103/2 (ant.) to maximum.
At 1520 Kc adjust
2b)
(ant.) to maximum.
If necessary repeat
3a) Press button K. Fine-tuning
center.
At 8 Mc adjust L 231 (osc.) and L 101 (ant.)
to maximum.
3b) At 16 Mc adjust C 236 (osco and C 101
(ant.) to maximum.
3c) If necessary repeat 3a) and 3b).
4) Press button
Just L 234 (osc.) and C 114 (ant.) to maxi-
mum.
Now insert the receiver
Connect signal generator
through dummy antenna (Fig.
trimmer (C 803) in the car bracket to its cen-
ter position.
5a) Press button
at 950 Kc.
5b) Align L 113 to maximum at 1520 Kc.
Sc) Align C 803 (in the car bracket)
mum at 570 Kc.
Sd) If necessary repeat 5a) —
6) Press button L. Align
190 Kc.
ausqe-
nicht nachqe-
FM Alignment
a) Press button UK and button
"Automatic-.
b) Connect VTVM
c) Connect micro-ampere-meter
in series with
Z and M.
Instructions
d) Connect audio voltmeter
e) At sockets
be carried out with a
use Si 401 (M A) and
Adjust P 404 for 20 mA. IF Alignment
Connect signal generator (unmodulated, outpt.&
cable matched) through 1000mmf. to emitter T 14
(testpoint ZF) and chassis. During the alianment
the VTVM should read about IS volts.
L 16 and L 18 until the noise voltage disappears
on the voltmeter (for thisset receiver to 95 Mc).
Filter VI (Ratio Detector)
(ON-OFF) button should
1) Adjust coupling subcritically
2) Adjust primary circuit
generator, at 460 Kc. un-
a 0,01 mf capacitor to
3) Adjust
of the IF-transformers
Filter
coupling screw coun-
Adjust circuit
by turning it clock-
Filter
1) Adjust
2) Adjust both circuits with L 161 and L 162 to
3) If necessary repeat 1) and 2).
4) Adjust coupling critically with K 161/2 (ma-
Filter
with L 183 and L 184
1) Adjust coupling subcritically
2) Adjust both circuits with L 141 and L 142 to
3) If necessary repeat 1) and 2).
4) Adjust coupling critically with K 141/2(ma-
subcritically with K 163/164
5) Adjust coupling subcritically
with L 163 and L 164
voltage).
Filter
Adjust circuit with L 84 to max. on tuning indi-
K subcritically cator.
audio-frequency by about
Filter
1) Adjust coupling subcritically
2) Adjust
3) If necessary
and Preselection.
4) Adjust coupling critically with K 23/4 (max.
on left, pointer must be
point on the dial.
5) Adjust coupling subcritically with K 23/4 thus
variable capacitor must be
Couple signal generator
antenna by means Of a
(distance min. 4 inches)
Filter VI (Ratio Detector)
Kc adjust L 232/3 Signal generator must now be freq. mod. (freq.
deviation
points
1)
C 246 (osc.) and C 104
2)
2a) and 2b).
on SW in the
3)
4)
5)
6)
"49-m-Band". At 6.1 Mc ad-
Alignment
1) Voltmeter
in the car bracket.
to antenna socket
2) At ICE Mc set potentiometer P 63 in such a
1). Turn antenna
3) At 87 Mc set potentiometer p 62 in Sucy a
M. Align L 12 to maximum
4) At 95 Mc set potentiometer P 60 in such a
to maxi-
5) If necessary repeat 2) — 4).
Connect Signal generator to sockets 20/4 nd
L 111 to maximum at
20/8 after having pressed key El
connect batterie-voltage
la) At 90 Mc adjust L 21 (osc.) L 18 and L 16
U. Switch off
1b)At 101Mc adjust C 43 (osc.) C 38 and C23
to test points X
and X'
lc) If necessary repeat 1) and 2).
with
center zero
ld) At 95 Mc, if necessary, correct calibraton
100-kiloohm to test points
to the loudspeaker.
17/4 and 17/8 there should be no
more than 3 v. when the potential-trans-
former (T 61-AC 122) is being adjusted.
that current adjust P 64 in such a way that
Gr. 61 will be constant (22-26 v). Now insert
the 3 remaining-batteries.
10,7 Mc
with K 201B.
with L 201 to maximum
on voltmeter.
secondary circuit with L 203 to zero
on micro-ampere-meter.
V
L 181 to max. on voltmeter.
IV
coupling subcritically with
max.
ximum on voltmeter).
Ill
with K 14112.
max.
ximum on voltmeter).
with K 141/2
thus decreasing voltage on VTVM by about
11
I
with
both circuits with L 23 and L 24 to
m ax.
repeat 1) and 2).
on voltmeter).
decreasing voltage on VTVM by about 510.
about 20 Kc). Voltage between
X — X' should be about 2 volts.
Tighten coupling with K 201/3until the audio
voltage at the output has fallen 100/0below
max.
Adjust secondary circuit with L 203 to zero
on micro-ampere-meter.
Adjust primary circuit with L 201 to max.
Signal generator must now be 300/0 an-pl.
mod.
Adjust P 201 to min. audio voltage.
Adjust primary circuit with L 201 to
Adjust secondary circuit with L 203 to zero
on micro-ampere-meter.
of the FM-Tuner
between point 9 (+) and
way between point 9 (+) and chassis, there
will be a voltage of 20 v.
way a voltage of 3,5 v is between poin 9
(+) and chassis.
wa a voltage of v is between
(+1and chassis.
to sockets 20/6 and 27.
to max.
to max.
With P 60.
With
Detune
K 1612.
K 234.
test
poir 9