Alignment And Adjustments - Samsung MAX-805 Service Manual

4. Alignment and Adjustments

4-1 Tuner
Samsung Electronics
* When adjusting T.H.D., readjust I/F coil on the Tuner Pack.
FM THD Adjustment
SSG FREQ.
98 MHz
Adjustment
point
FM DETECTOR COIL
(IFT2)
60 dB
Output
Minumum Distortion (0.3% below)
(Figure 4-1)
FM Search Level Adjustment
SSG FREQ. 98 MHz
Adjustment
BEACON
point
SENSITIVITY
(IVR1) SEMI-VR(5KΩ)
Output
450kHz
Adjust IVR1 so that "TUNED" of FLT is
lighted (Figure 4-2)
4Gain : 20dB(CE standard)
AM(MW) I.F Adjustment
SSG FREQ.
450 kHz
Frequency
522 kHz
Adjustment
AM I.F COIL
point
(IFT1)
Maximum output (Figure 4-3)
FM
Output
Antenna SET
GND
Terminal
Oscilloscope
FM SSG
Input
Speaker
Terminal
output
Distortion Meter
Figure4-1 IF CENTER and THD Adjustment
FM Antenna
30 dB
SET
FM IN
GND
FM SSG
5 kΩ
Figure4-2 FM Auto Search Level Adjustment
60cm
IFT1
AM ANT
OUTPUT
IN
Speaker Terminal
AM SSG
450KHZ
INPUT
VTVM Oscilloscope
Figure4-3 AM I.F Adjustment
Input
4-1