Samsung MM-18 Service Manual page 14

mm18(5) 3/23/98 3:03 PM Page 2
Alignment and Adjustments
4-1-1 Test Equipment
1. AM Standard Signal Generator (S.S.G) : 400Hz, 30% MOD
2. Oscilloscope
3. VTVM
4. Frequency counter
5. Loop antenna
6. Dummy load (4½)
7. DC voltmeter
4-1-2 Pre-Adjustment
1. Check the source voltage
2. Press TUNER/BAND to select the AM(MW) function.
3. Set the volume control to mid position.
4-1-3 AM Adjustment
Step Item Connection
Intermediate
1
frequency (IF) Figure 4-5
adjustment
Figure 4-4
AM frequency
2
Connect DC
coverage
voltmeter to AM VT
adjustment
3
and GND(OKV1)
4
Figure 4-5
AM tracking
adjustment
-
5
AM Signal
Generator
4-2
SSG.FREQ. FREQ. Setting Adjust. Point
450 KHz IT 2
522 KHz
OT 1
- 522 KHz
- - -
594 KHz 594 KHz OL 1
- - -
AM VT(OR1)
SET
Input
OKV1 GND
DC Voltmeter
Figure 4-4
VTVM
AM
Loop Speaker
Test Loop
Antenna Jack Terminal
Antenna
IN
SET
60 cm
GND
Figure 4-5
Remark
Maximum output
0.9V
Non Adjust
Maximum output
Non Adjust
Oscilloscope
OUT
Samsung Electronics