HCD-GX90D/RV800D
20
FM Tuned Level Adjustment
Procedure:
1.
Supply a 25 dB 98 MHz signal from the ANTENNA terminal.
2.
Tune the set to 98 MHz.
3.
Adjust RV11 to the point (moment) when the TUNED indicator
will change from going off to going on.
Adjustment Location: MAIN board
Null Adjustment
Procedure:
1.
Supply a 60 dB
98 MHz signal from the ANTENNA terminal.
2.
Tune the set to 98 MHz.
3.
Measure voltage between pin 22 and pin 3 of IC 11. Adjust
T11 ubtil the voltage becomes 0 V.
Adjustment Location: MAIN board
Adjustment Location
[MAIN BOARD] Component side
FM RF SSG
75
Ω
coaxial
Carrier frequency : 98 MHz
Modulation : AUDIO 1 kHz, 75 kHz
deviation (100%)
Output level : 25 dB (at 75
Ω
open)
FM ANTENNA terminal
(TM1)
set
FM RF SSG
75
Ω
coaxial
Carrier frequency : 98 MHz
Modulation : AUDIO 1 kHz, 75 kHz
deviation (100%)
Output level : 60 dB (at 75
Ω
open)
FM ANTENNA terminal
(TM1)
set
TUNER SECTION
T11
NULL
RV11
FM TUNED LEVEL
1
12
24
13
IC11
TM1
IC1104
Содержание HCD-GX90D
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