Sharp GF-9500H Serviceanleitung Seite 12

TAPE SPEED ADJUSTMENT
(See Figure 18-1)
I. Connect the frequency
2. Insert the test tape (TEAC MTT•I II, 3 kHz-recorded) and
play its intermediate area.
3. Then adjust the variabie resistor inserting a high-frequency
adjustment bladed screwdriver th rough the adjustment hole
at the bottom of the motor so that the frequency counter
reads 2960 to 3000 Hz.
Should it become necessary at any time to check the align
ment of this receiver, proceed as follows;
1. Set the volume control (V R 109) to maximum.
2. Attenuate the signals from the generator enough to swing
the most sensitive range of the output meter.
3. Use a non-metallic alignment tool.
4. Repeat adjustments to insure good results.
5. Set the Function Selector
position.
FM IF/RF
• Set the signal generator to produce a signal of 400Hz, 30%,
FM modulated.
TEST FRE-
STEP BAND STA. QUEN-
GE
CY
IF (AS Shown in Figure
18-2 ,
10.7
MHz
RF(As shown in Figure
18-3
87.3
2
MHz
Band
cover-
age
108.3
3
MHz
88
4
MHz
Track-
ing
108
5
MHz
Repeat steps2,3,4 and 5 until no further improvement
6
can be made.
FM STEREO
Set the BandSelectorSwitch(SW I) to "FM" positionand
FM Mode SelectorSwitch (SW 205) to "stereo" position.
• Before this adjustment, connect the anode side of Stereo
Indicator (D120) to GND.
• As shown in Figures 18-4 and 18-5, make connection of
instrument.
DIAL
FREQUENCY
POINTER
98MHz (54dB)
98MHz
un modulated
counter to the unit.
GENERAL ALIGNMENT
Switch (SW101) to
"radio"
ALIGNEMNT
DIAL AD.
SET- JUST- REMARKS
TING MENT
make connection of instrument.)
High
Adjust for
Tl
end of
best ' 'S"
T2
dial
curve
make connection of instrument.)
Low
end of
dial
H igh
Adjust for
end of
TC2
maximum
dial
output
88
MHz
108
TCI
MHz
ALIGNEMNT
ADJUST.
REMARKS
MENT
Adjust for
VRI
38 ± 0.15kHz
mode
T est tape
tomt
Figure
INSTRUCTION
10
Telescop.c
TOR nad Antenna
UNIT
F igure
Telescopic
FM SIGNAL
(See Figure 18—5) Rod Antenna
GENERATOR
o
GND
Figure
FM STEREO
Telescopic
SIGNAL GENERATOR
Rod Antenna
GNO
OUMMY
(See Figure 18—5)
Figure 18-4
Z = 75 Ohm<
R2
Z 50 Ohm<
Z. Output impedance of signa/ generator
Figure 18-5
Frequencv
SO
ooo
@ Pin IGNO)
S*ket
18-1
'
GND
18-2
ELECTRON'C
VOLTMETER
EXT
(0601 , J602)
o
UNIT
3.20hrn
GNO
18-3
IDOOPF COUNTER
UNIT
330K Ohm
GNO
To Telescopic Rod Antenna
RI —37.5 ohm
R2 75 Ohm
RI - 50 ohm
R2 50 ohm
To Chass.s GND
FM DUMMY
Curve