SAMSUNG HT-DM150N, HT-DM160 Service Manual Alignment & Adjustment
1-1Samsung Electronics
1. Alignment and Adjustments
1-1.Tuner
FM THD Adjustment
Output
Output
28 dB(±2dB)
60 dB
Minumum Distortion (0.4% below)
(Figure 1-1)
SSG FREQ.
Adjustment
point
(FM DET)
98 MHz
FM DETECTOR COIL
FM Search Level Adjustment
Adjust SVR1 (Figure 1-2)
Figure1-2 FM Auto Search Level Adjustment
*Adjust FM S.S.G level to 28dB
Figure1-1 IF CENTER and THD Adjustment
SSG FREQ.
Adjustment
point
(SVR1)
98 MHz
BEACON
SENSITIVITY
SEMI-VR(10KΩ)
FM S.S. G
GND
28 dB
FM S.S. G
Output
GND
Speaker
Terminal
FM
Antenna
Terminal
Distortion Meter
Input
SET
Input
output
Oscilloscope
FM IN
FM Antenna
SET
20 kΩ
OUTPUT
AM SSG
450KHZ
INPUT
AM ANT
IN
Speaker Terminal
60cm
AM IF
VTVM Oscilloscope
AM(MW) I.F Adjustment
Maximum output (Figure 1-3)
SSG FREQ.
Frequency
Adjustment
point
450 kHz
522 kHz
AM IF
Figure1-3 AM I.F Adjustment
OUTPUT
* Adjustment Location of Tuner PCB
Fig 1-4 OSC Voltage
AM(MW) OSC
Adjustment
Output
1~7.0±0.5V
Received FREQ.
Adjustment
point
522~1611 KHz
MO
AM(MW) RF
Adjustment
ITEAM
594 KHz
MA
Maximum
Output(Fig1-4)
LW OSC
Adjustment
146~290 KHz
LO
2~7.0±0.5V
LW RF
Adjustment
150 KHz
LA
Maximum
Output(Fig1-4)
Alignment and Adjustments
1-2 Samsung Electronics
1-1-2 AM(MW),LW,SW1,SW2 Adjustment
Circuit Measuring Instrument & Step S.S.G Radio dial Adjusting Adjust for
to be Arrangement Frequency Setting Point
Adjusted
1 522KHz 522KHz MW OSC Adjust for
1.0V±0.1V at the low.
OSC Connect AM signal (IR117)
generator to loop
antenna,VTVM AND
oscilloscope 2 1611KHz 1611KHz MW OSC
Check for 7.0V±1.0V at the high.
(Fig 1-3) (IR117)
AM
(MW)
RF “ 1 594KHz 594KHz MW ANT Maximum out
INTER FREQ “ 1 455KHz 522KHz TL2 Maximum out
OSC Fig 1-3 1 146KHz LW OSC Adjust for
2.0V±0.1V at the low.
LW 2 290KHz LW OSC Check for 7.0V±1.0V at the high.
RF 1 150KHz 150KHz LW ANT Maximum out
OSC Fig 1-3 1 2.3MHz SW1 OSC Adjust for 1.0V±0.1V at the low.
SW1 2 7.3MHz - Check for 8.5V±1.0V at the high.
RF 1 3.5MHz 3.5MHz SW1 ANT Maximum out
OSC Fig 1-3 1 9.5MHz SW2 OSC Adjust for
1.5V±0.1V at the low.
SW2 2 26.1MHz -
Check for 8.0V±1.0V at the high.
RF 1 10MHz 10MHz SW2 ANT Maximum out
Loading...