SAMSUNG MAX-KJ730, MAX-KJ740 Service Manual Alignment & Adjustment

1-1Samsung Electronics
1. Alignment and Adjustments
1-1.Tuner
FM THD Adjustment
Output
Output
28 dB(±2dB)
60 dB
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 k
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
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