Rotel RX-504 Technische Anleitung Seite 5
Procédure d'alignement AM IF et HF
Instruments: Le Générateur du Signal AM et AC VT VM
Notes: Mettre Ie commutateur
LeSignald'entrée doit étre maintenuIe plusbasque possiblepour éviter I'action AVC.
Générateur
Point
Couplage
Branche no. 6 (Sur
IF plaquette) par
I'intermediaire
d'u
I
Condensateur
de
0.01
mfd.
Boucle
de mesure
2
Envoyée Ie Signal
Sur ferrite
boucle
Répéter Ies points 2 et 3 jusqu'aucun perfectionnement est marqué.
4
FM IF and RF Alignment Procedure
Instruments:
FM Signal Generator and H.D. Analyzer.
Set Function
Selector to "FM " position.
Set
FM MUTING
out.
•
Set VR301 to mid-position.
Connect
FM Signal Generator
minal.
Connect Oscilloscope and H.D. Analyzer to Tape Out
jack.
A. FM
IF ALIGNMENT
1. Set Signal Generator
100% Mod.)
and adjust the tuning
output.
(The antenna terminal
1mV.)
2. Adjust the meter balance by adjusting
core of LI 10.
3. Adjust
IF Coil
L107 in front end to obtain maxi-
mum deflection
on scope.
4. Set distortion
to minimum
core
of L 110.
B. FM RE ALIGNMENT
1. Set
Signal
Generator
(400Hz,
100% Modulation)
at 106MHz on the dial scale. Then adjust FM OSC
trimmer
CT 3 (on VC) to obtain
tion on scope.
de Sélecteur å la position MW ou AM.
•
Fréquence
Non
455KHz
(400Hz
å I'extrémité
Mod.)
I'échelle
600KHz
( 400Hz
600KHz
l'échelle
Mod.)
l'écran
1400KHz
1400KHz
(400Hz
30% Mod.)
I'échel Ie de
I'écran
to
FM antenna ter-
Frequency at 98MHz (40Hz,
to maximum
voltage should be
the lower
by adjusting
the upper
Frequency
at
106MHz
and also tune
receiver
maximum
deflec-
—5—
Ecran
d' accord
Réglage
L202, et L203
Interférnence
de
(Sur la
plaquette)
L201 (OSC) et
sur
de
et LOOI
(ANT Ligne)
CT5 (OSC) et
sur
CT4 (ANT)
sont
sur V.C.
Set the receiver at 90MHz on the dial scale, and
2.
change the frequency of Signal Generator so that
the output of the TAPE OUT becomes maximum.
Then make sure Signal Generator
within
90MHz±150KHz.
Sensitivity on this alignment must be attempted
3.
at 106MHz by adjusting CTI and CT2 to obtain
maximum
balance sensitivity at 90 and 106MHz.
4. Adjust FM OSC coil L105 and FM RF Coil LIOI,
102, 103 and 104 as described below only when
tracking
attained by adjusting CT 1, CT2, and CT3.
Fine tune Signal Generator and receiver to
a.
90MHz, and adjust L107v L 101, L 102. L103
and L 104.
Fine tune Signal Generator and receiver to
b.
106MHz and adjust CT 1, CT2 and CT3 so that
maximum output is obtained.
Repeat step a and b to obtain enough effect.
c.
Réglage pour
Lecture
maximum
Sur Ie voltmétre
électronique
VTVM
Tous
frequency
deflection
on scope, and fine tune to
and
sensitivity
adjustments
AC
stays
are
not
