Sharp RG-375H Serviceanleitung Seite 14
-375H(BK)
AUTO
NOISE
CUT
LEVEL
SWITCH
POSITION
FM
FM STEREO
Main:
MODULATOR
Pilot:
SIGNAL
GENERATOR
400 Hz. 22.5 kHz dev. (stereo signal)
DIAL
FREQUENCY
POINTER
SETTING
98 MHz at 42 dB
98 MHz
• Make the electrolytic capacitor C403 shorted.
SDK ADJUSTMENT
RG-375H only
SWITCH
söK
POSITION
STEP
TEST
FREQUENCY
STAGE
SK VCO
No signal
generator
2
DK
VCO
is uæd.
4
57
kHz
57 kHz
(IOOmV)
Level
ADJUSTMENT
stereo
I kHz.
22.5 kHz dev.
19 kHz. 6.75 kHz dev.
ADJUST.
REMARKS
MENT
VRIOI
The voltage
between
the
collector
and
the emitter
of Transistor
0401 is reading
0.5
2.0 v.
ADJUSTMENT
REMARKS
Adjust for
VR301
57.00
kHz ±
100
Hz.
VR302
Adjust
for
Hz
Hz.
T301
Adjust
for
maximal
out•
put.
Z = Output Impedance Of
Figure 14—1 FM DUMMY
FM Signal
Generator
TP301
O
GND
500
TP304 T P302—VR302
VR301
IC301
T301
TP301
Figure 14
—3 SDK P.W.B. ADJUSTMENT
(RG-375H only)
— 14 —
TO Antenna
Socket
RI
=
37.5
75 (ohms),
R2
RI
= 50 (Ohms)
R2 = SO(ohms)
TO GROUND
Generator
TP302
SK
DK
TP303
57 kHz
TP304
Frequency
unit
Ground
TP305
Figure 14—
2
SDK
IC302
4
9
ECB
8
0305
TP303
TP305
POINTS
(Ohms)
Counter
