Sharp RG-F251G(BK) Serviceanleitung Seite 10

©
FM IF/RF ADJUSTMENT
SWITCH
POSITION
FM mono
SIGNAL
GENERATOR 1 kHz 30 %, FM modulated
DIAL
TEST | FRE-
STEP POINTER
srer STAGE | QUENCY | setTING
10,7 MHz
re
= steps 1 and 2 until no further improvement can be
REMARKS
1. Using a mi-
nus driver,
turn the
core of T1
counter-
clockwise
before tak-
ing it out
of the bob-
bin.
2. Adjust for
best "IF"
curve,
Adjust for maxi-
T1
mal output.
1FT501
Lowest
Frequency
weenie
made.
—
Adjust for
Band | 97.3 MHz | bOWeSst | tes01 | maximal
coverage Frequency auipar |
separe: Adjust for
VCO FREQUENCY ADJUSTMENT
SIGNAL
GENERATOR
1 kHz, 30%, FM modulated
(mono signal)
ADJUST-
MENT | REMARKS
DIAL
FM stereo position (unmodulated)
POINTER
SETTING
FM mono position
FREQUENCY
are at 98.0 MHz var | an 19.00 kHz
ANSS ADJUSTMENT
POSITION FM inene
Co GR 1 kHz, 30%, FM modulated
DIAL
POINTER | ADJUST-
SETTING | MENT
High
Frequency
FREQUENCY
REMARKS
Adjust for minimum
L10 output.
19 kHz
R1
TO ANTENNA SOCKET
, R1 = 37.5 ohms
Z= 78 fohm)<< po = 76 ohms
R1 = 50 ohms
Z=50 lohm)< 5 sno GhinE
TO GROUND
R2
Z = OUTPUT IMPEDANCE OF SIGNAL GENERATOR
Figure 11-7 FM DUMMY
RG-F251G
RG-F252E
10.7 MHz
Oscilloscope
FM Sweep
Generator Antenna Socket
Figure 11-1 FM IF
Figure 11—2 FM IF CURVE
Electronic
Voltmeter FM signal
Generator
Antenna
Dummy
(See Figure 11-7)
Figure 11—3 FM RF
FM Stereo
Modulator
Electronic
Speaker
e Voltmeter
Terminal
LorR
(See Figure 11-7)
| Antenna Socket
FM Signal
Generator
Figure 11—4 SEPARATION
FM signal
Generator
TP2 Frequency
100 kohm Counter
Antenna
Socket
(oo = ee
Bury
(See Figure 11-7)
Figure 11—5 VCO FREQUENCY
Electronic
FM Signa! Voltmeter
Generator
Figure 11—6 ANSS
RG-F251G
RG-F252E
©
UKW-ZF/HF-EINSTELLUNG
SCHALTER-
STELLUNG
FM mono
SIGNAL-
PRUF- | FRE- | SictapiniEINSTEL- BeMeR- |
RITT| STUFE | QUENZ [Creat une] LUNG KUNGEN
©)
REGLAGE FM FI/RF
POSITION DU
COMMUTATEUR
FM Mono
GENERA TEUR
DE SIGNAUX
1 kHz, 30%, modulé FM
MISE AU | _ _
POINT DE |REGLAGE| REMARQUES
L'INDEX
1. A l'aide
QUENCE
[ 19 kHz
HINWEISE FUR DIE FREQUENZEINSTELLUNG
Um die ZTF-Vorschrift Nr. 478/1981 zu erfillen, den unte-
ren Bereich der Skalenfrequenz auf (87,5 MHz) sowie den
oberen Bereich der Skalenfrequenz auf (108 MHz) im UKW-
Bereich jeweils durch entsprechendes Einstellen des Schwin-
gertrimmers (TC501) der Eingangsstufe, und der Schwin-
gerspule (L501) gema&& Abbildung 9-2 festlegen.
stellen.
—12—
AT
Fades