Sharp GF-4646

FM IF/RF ALIGNEMNT
l Set the signal generator to produce a signal of 400Hz, 30%,
FM modulated.
,
TEST FRE- DIAL AD-
STEP BAND STA- QUEN- SET- JUST-
REMARKS
GE CY TING MENT
IF (As shown in Figure 6-1,
make connection of instruments.)
Output
6
Repeat steps 2.3.4 and 5 until no further improvement
can be made.
i
FM STEREO ALIGNEMNT
l Set the Band Selector Switch (SWI) to “FM” position and
Function Switch (SW102) to “stereo” position.
l As shown in Figures 6-3 and 6-4, make connection of
instrument.
FREQUENCY
DIAL
ADJUST-
POINTER
MENT
REMARKS
98MHz (54d8)
un modulated
98MHz
VI31
Adjust for
38 i 0.15kHz
To Telescopic Rod Anrenna
Figure 6-4 FM DUMMY
VP1 I
10 7 MH*,
oscILLOSCOPE “S”Cuwe
FM SWEEP GENERATOR
ITPZI
lTP5l
Figure 6-l
ELECTRONlC
VOLTMETER
Figure 6-2
FM STEREO
ITPl )
SIGNAL GENERATOR
Tele3COpbC
IC3 lTP61
FRERUENCY
Bee Figure 641 LTPll
ITP71
DUMMY
Figure 6-3
q
T:, Tm
/
Figure 6-5 ALIGNMENT POINTS
NOTES ON SCHEMATIC DIAGRAM
1. Resistor:
l Unless otherwise specified all resistance in ohms,
K = 1000 ohms
2. Capacitor:
* Unless otherwise specified all capacitance in microfarads,
P = Picofarads
4. + : Printed resistor
5. Parts marked with ” &, ” (WJ) are important for main-
taining the safety of the set.
Be sure to replace these parts
with specified ones for maintaining the safety and perform-
ante of the set.
l (CH), (RH): Temperature compensation
3. Voltage reading are measured with Digital Multimeter under
no signal condition in tape position.
(
) : AM mode
: FM mode
-6-
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