Samsung MAX-810, Service Manual

Page: 16 / 72

4. Alignment and Adjustments
4-1 Tuner
Samsung Electronics 4-1
FM THD Adjustment
Output
Output 450kHz
60 dB
Minumum Distortion (0.3% below)
(Figure 4-1)
SSG FREQ.
Adjustment
point
(IFT2)
98 MHz
FM DETECTOR COIL
AM(MW) I.F Adjustment
Maximum output (Figure 4-3)
SSG FREQ.
Frequency
Adjustment
point
(IFT1)
450 kHz
522 kHz
AM I.F COIL
FM Search Level Adjustment
Adjust IVR1 so that “TUNED” of FLT is
lighted (Figure 4-2)
4Gain : 20dB(CE standard)
Figure4-2 FM Auto Search Level Adjustment
Figure4-3 AM I.F Adjustment
Figure4-1 IF CENTER and THD Adjustment
SSG FREQ.
Adjustment
point
(IVR1)
98 MHz
BEACON
SENSITIVITY
SEMI-VR(5K
Ω
)
FM SSG
OUTPUT
AM SSG
450KHZ
INPUT
AM ANT
IN
Speaker Terminal
60cm
IFT1
VTVM Oscilloscope
GND
30 dB
FM SSG
Output
GND
Speaker
Terminal
FM
Antenna
Terminal
Distortion Meter
Input
SET
Input
output
Oscilloscope
75
Ω
Dummy
FM IN
FM Antenna
SET
5 k
Ω
IFT1
AM RF
IFT2
FM DET
IVR1
FM AUTO STOP ADJ.
* When adjusting T.H.D., readjust I/F coil on the Tuner Pack.