Alignment And Adjustments - Samsung MAX-L82 Service Manual

1. Alignment and Adjustments

1. Tuner
* Adjustment Location of Tuner PCB
LW
AM(MW)
AM(MW)
OSC
RF
OSC
ITEAM
Received FREQ.
522~1611 KHz
594 KHz 146~290 KHz
Adjustment
MO
MA
point
Maximum
Output 2~7.0±0.5V
1~7.0±0.5V
Output (Fig1-4)
MAIN
VT
PCB
Fig 1-4 OSC Voltage
Samsung Electronics
AM(MW) SW1 SW2
SW1
RF RF OSC
OSC
150 KHz 3.5MHz
9.5~26.1MHz
2.3~7.3 MHz
LO LA
LO MA
Maximum
Maximum
Output
Output
1~8V±1V
1~8V±1V
(Fig1-4)
(Fig1-4)
GND
TESTER
FM THD Adjustment
SSG FREQ.
Adjustment
point
FM DETECTOR COIL
(FM DET)
60 dB
Output
Minumum Distortion (0.4% below)
(Figure 1-1)
FM Search Level Adjustment
SSG FREQ.
Adjustment
BEACON
point
SENSITIVITY
(SVR1) SEMI-VR(10KΩ)
Output 28 dB(±2dB)
Adjust SVR1 so that "TUNED" of FLT
is lighted (Figure 1-2)
*Adjust FM S.S.G level to 28dB
SW2
RF
10MHz
LO MA
AM(MW) I.F Adjustment
Maximum
Output
(Fig1-4) SSG FREQ.
Frequency
Adjustment
point
Maximum output (Figure 1-3)
FM
Output
Antenna
GND
Terminal
98 MHz
FM S.S.G
Speaker
Terminal
Figure1-1 IF CENTER and THD Adjustment
28 dB
98 MHz
GND
FM S.S.G
Figure1-2 FM Auto Search Level Adjustment
450 kHz
522 kHz
OUTPUT
AM IF
AM SSG
450KHZ
INPUT
Figure1-3 AM I.F Adjustment
SET
Oscilloscope
Input
output Input
Distortion Meter
FM Antenna
SET
FM IN
20 kΩ
60cm
AM IF
AM ANT
IN
Speaker Terminal
OUTPUT
VTVM Oscilloscope
1