Samsung MM-28 - Alignment and Adjustments

4. Alignment and Adjustments
4-1 Tuner
Samsung Electronics 4-1
FM T.H.D Adjustment
Minimum Distortion (Figure 4-1)
SSG FREQ.
Adjustment
point
(IFT2)
Output
98 MHz
FM DETECTOR COIL
60 dB
AM(MW) I.F Adjustment
SSG FREQ.
SET FREQ.
Adjustment
point
(IFT1)
450KHz
522 KHz
AM I.F COIL
FM Search Level Adjustment
Adjust IVR1 so that “TUNED” of FLT is
lighted (Figure 4-2)
Maximum output (Figure 4-3)
Figure 4-2 FM Auto Search Level Adjustment
Figure 4-3 AM I.F Adjustment
Figure 4-1 IF Center and T.H.D Adjustment
SSG FREQ.
Adjustment
point
(ISVR1)
Output
98 MHz
BEACON
SENSITIVITY
SEMI-VR(5KΩ)
98 MHz
FM SSG
Output
60 cm
VTVM
Input
Oscilloscope
AM SSG 450 KHz
AM Antenna
Speaker
Terminal
IN
Output
GND
26 dB
FM SSG
Output
GND
Speaker
Terminal
FM
Antenna
Terminal
Distortion Meter
Input
SET
Input
output
Oscilloscope
FM IN
FM Antenna
SET
5 kΩ
* When adjusting T.H.D., readjust I.F coil on the Tuner Pack.
IVR1
IFT2
IFT1