Notes On Schematic Diagram; Fm If/Rf Alignment; Fm Stereo Alignment - Sharp GF-4646 Service Manual

FM IF/RF ALIGNEMNT
l
Set the signal generator to produce a signal of 400Hz, 30%,
FM modulated.
S T E P B A N D S T A - QUEN- S E T - JUST-
IF (As shown in Figure 6-1, make connection of instruments.)
Repeat steps 2.3.4 and 5 until no further improvement
6
can be made.
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
Unless otherwise specified all resistance in ohms,
l
2. Capacitor:
* Unless otherwise specified all capacitance in microfarads,
l
3. Voltage reading are measured with Digital Multimeter under
no signal condition in tape position.
- - - . - - .
T E S T FRE- D I A L
GE
D I A L
POINTER
MENT
To
Figure 6-4 FM DUMMY
REMARKS
REMARKS
Adjust for
38 i 0.15kHz
4 . + : P r i n t e d r e s i s t o r
5. Parts marked with " &, " (WJ) are important for main-
taining the safety of the set.
with specified ones for maintaining the safety and perform-
- 6 -
Figure 6-l
Figure 6-2
Figure 6-3
Figure 6-5 ALIGNMENT POINTS
Be sure to replace these parts
-
q
-