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HITACHI SR-2004
CAUTION
1.
Since simple adjustment of MF201 components has been performed before shipment, IF adjustment is not required.
When replacing the MF201, however, use an MF201 with the same color marking as that of the MF203.
2. As the result of the adjustment step 6, the best point of adjustment from step 5 will be shifted a bit. Repeat the adjust-
ment of step 5 and 6 until the deterioration becomes minimum and the pointer of tuning meter is in its center.
3. After setting IF BAND SELECTOR sw. to WIDE and making the signal of L ch and Pilot, adjust R322 so that the out-
put wave form of R ch becomes min.
Set IF BAND SELECTOR sw. to NARROW and making the signal of L ch and Pilot, adjust R323 so that the output
wave form of R ch becomes min. Optimize R322 and R323 so that the leak level of the L ch signal is equal to that of
the R ch signal.
ATTENTION
1. Etant qu'un reglage simplifie des composants de MF201 a ete fait avant l'envoi de l'appareil, un reglage de IF n'est pas
indispensable. Cependant, quand MF201 doit etre remplace, utiliser un MF201 comportant la meme couleur que celle
de MF203.
2. A la suite du reglage decrite en 6, is meilleur reglage decrit en 5 sera legerement decaIe. Renouveler les reglages 5 et 6
jusqu'a ce que les deteriorations soient minimum et que l'aiguille de l'indicateur d'accord soit en position centrale.
3. Apres avoir regIe Ie selecteur de bande IF sur la position "WIDE" et avoir regle Ie signal du canal gauche Let Ie signal
pilote, ajuster R322 pour que la forme d'onde de sortie du canal droit R soit minimale.
Regler Ie selecteur de bande IF sur la position "NARROW" et regler Ie signal du canal gauche Let Ie signal pilote puis
ajuster R323 pour la forme d'onde de sortie du canal droit R soit minimale. Rendre R322 et R323 optimum pour que
Ie niveau de crete du signal de canal gauche L soit egal a celui du canal droit R.
AM TUNER ALIGNMENT· REGLAGE DE TUNER AM
e
Condition
Function
AM
Modulation
400 Hz
30'X
Connection
Setting
Adjust for
Connexion
Montage
Reglage pour
Sequence
Input
Output
Tuning
Signal
Adjust
Entree
Sortie
Indicateur d' accord
Reglage
Indication
@
@
8
0
0
8
;/)
8 0
IF Amp.
out
lK
TP 6
IN
lli
x
1
Amplificateur
~T
•
.
~
455kHz
MF251
de frequence
~lu
intermediaire
Termi.l V. C. )
CAUTION (1)
Ferrite REC out or SP out
600kHz
600kHz
T252
2
Covering
Antenna
j
Guipage
eom
1400kHz
1400kHz
TC7
Vmax
$
I
Ferrite
600kHz
600kHz
Antenna
CAUTION (2)
3
Tracking
T252
Alignement
J
1400kHz
TCG
1400kHz
TC8
-
CAUTION
I. In item I, set the capacitance of the variable capacitor to minimum and ad-
just red and blue cores of MF251 so that the wave form is as shown in Fig. II.
As MF251 contains a 455 kHz ceramic filter, sometimes the center of the
marker will not correspond to that of the wave form.
In this case, neglect the marker. After adjusting as above, increase the output
level of the sweep generator and adjust MF251 again so that the top of the
wave form A (indicated in Fig. 12) will be flat and wide.
2. In carrying out adjustment described in items 2 and 3, repeat the adjustment
so that the output at 600 kHz and 1400 kHz become maximum.
-25 -
Fig. II
Fig. 12
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