RXD-V555/V757
7
ADJUSTMENT
APPLY WAX AFTER
ADJUST L312
T306
T303
T302
IC301
L354
T351
T301
L312
IC303
IC302
X352
NO.
CHECKING ITEM
SG 'N' SET FREQ
ADJ
DC VOLTAGE
REMARKS
POINT
SPEC
FL
531KHz
T306
1.1V ± 0.1V
ADJUST UNTIL VOLTAGE
1.
AM FREQ
(TP301)
IS WITHIN GIVEN SPEC.
COVERAGE
FH
1602KHz
(TP301)
8.8V ± 0.5V
CONFIRM VOLTAGE IS WITHIN
GIVEN SPEC
2.
AM IF
FL
990KHz
T351
-
SP OUTPUT
î
ADJ T351 UNTIL MAX
(50dB)
(TP302)
POINT FROM AC VOLTMETER
3.
AM FREQ.
FL
990KHz
(TP302)
-
CONFIRM MAX. OUTPUT.
TRACKING
(50dB)
NO.
CHECKING ITEM
SG 'N' SET FREQ
ADJ
SPEC
REMARKS
POINT
FL
87.5MHz
T301
1.3V ± 0.1V
ADJUST UNTIL VOLTAGE IS WITHIN
1.
FM FREQ
(TP301)
GIVEN SPEC
COVERAGE
FH
108.0MHz
(TP301)
7.8V ± 0.8V
CONFIRM VOLTAGE IS WITHIN
GIVEN SPEC.
ADJUST COIL T302 UNTIL MAX.
T302
OUTPUT
2.
FM IF
-
10.7MHz
(TP302)
-
3.
FM FREQ.
-
98MHz
L312
-
ADJUST L312 UNTIL MAXIMUM
TRACKING
(TP302)
WAVEFORM APPEAR.
CONDITION : AM MOD 30% DEV 400Hz
TO ANTENNA TERMINAL
75
Ω
75
Ω
37.5
Ω
S.G
(50
Ω
)
(50
Ω
)
(50
Ω
)
TO GND
ANT DUMMY CIRCUIT FOR FM
*
CENTER FREQ. MARKER 10.7MHz
*
CFM GOOD AND MAX 'S'
CURVE IS OBTAINED.
Adjustment Parts Configuration
