Samsung MAX-ZS750 Service Manual

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