Samsung MM-18 - Alignment and Adjustments

4. Alignment and Adjustments
4-1 Tuner
Samsung Electronics 4-1
FM THD Adjustment
Minimum Distortion (Figure 4-1)
SSG FREQ.
Adjustment
point
(IT1)
98 MHz
FM DETECTOR COIL
FM Stereo Adjustment
L-CH/R-CH : Maximum(Figure 4-3)
SSG FREQ.
Frequency
Adjustment
point
(ISVR1)
98MHz
98MHz
SEMI-VR(5KΩ)
FM Search Level Adjustment
Adjust ISVR2 so that “TUNED” of LCD
is lighted (Figure 4-2)
Figure4-2 FM Auto Search Level Adjustment
Figure4-3 FM Stereo Separation Adjustment
Figure4-1 IF CENTER and THD Adjustment
SSG FREQ.
Adjustment
point
(ISVR2)
98 MHz
BEACON
SENSITIVITY
SEMI-VR(50KΩ)
FM SSG
FM
SSG
75Ω
Dummy
5KΩ
Stereo
Modulator
(Pilot 10%)
OUT
Oscilloscope
FM antenna
SET
Speaker
Terminal
EXT
GND
VTVM
GND
22 dB
FM SSG
Output
GND
Speaker
Terminal
FM
Antenna
Terminal
Distortion Meter
Input
SET
Input
output
Oscilloscope
FM IN
FM Antenna
SET
50 kΩ
ISVR1
IT1
FM DET
ISVR2
mm18(5) 3/23/98 3:03 PM Page 1