Tuner Alignment - Sherwood RX-4109B/B Service Manual

1. Electrical specification.
No.
1-1
Local OSC
1-2
Frequency cover range
1-3
Standard supply voltage
1-4
FM Antenna Impedance
1-5
AM Loop Antenna
2. Electrical Characteristics.
No. TEST ITEMS
AF Output Level
FM
Auto Stop Level
Stereo Separation
AF Output Level
MW
Auto Stop Level
3. Adjust Point.

TUNER ALIGNMENT

ITEMS
TEST
CONDITION
47 kΩ Load 98.1
98.1
98.1
1kHz
47kΩ Load
SPECIFICATION
M W
Above the receiving Frequency
522 ~1620kHz
75 ohm unbalance
9.5uH ( 1kHz ) : S0160BL-25
T.L. MOD.
T.P.
dBu kHz,%
60
40
--
60
999 74 30
999 -- 30
F M
87.5 ~ 108.0MHz
12 +/-0.5V
Specification UNIT
280±100 mV
25 ±6
dBu
25 min dB
180 ±60
mV
55 ±15
dBu
Adjustment
Non Adjust
SVR01
SVR02
Non Adjust
Non Adjust