8
HCD-RV2/RV5/RV6
TUNER SECTION
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 RV101 to the point (moment) when the TUNED indica-
tor 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 (AFC) and pin 3 (REG) of IC
101. Adjust T101 ubtil the voltage becomes 0 V.
Adjustment Location: MAIN board
Adjustment Location
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
(JK101)
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
(JK101)
set
IC201
IC101
T101
NULL adjustment
RV101
FM TUNED LEVEL adjustment
12
1
1
40
3130
21
20
11 10
24
13
JK101
- MAIN BOARD (component side)-
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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