SAMSUNG MAX-N25 Service Manual Alignment & Adjustment
OUTPUT
AM SSG
450KHZ
INPUT
AM ANT
IN
Speaker Terminal
60cm
TL2
VTVM Oscilloscope
1. Alignment and Adjustments
1-1 Tuner
Samsung Electronics 1-1
FM THD Adjustment
Output
Output
1kHz 28dB
60 dB
Minumum Distortion (0.3% below)
(Figure 1-2)
SSG FREQ.
Adjustment
point
(TL3)
98 MHz
FM DETECTOR COIL
AM(MW) I.F Adjustment
Maximum output (Figure 1-4)
SSG FREQ.
Frequency
Adjustment
point
(TL2)
450 kHz
522 kHz
AM I.F COIL
FM Search Level Adjustment
Adjust IVR1 so that “TUNED” of FLT is
lighted (Figure 1-3)
4Gain : 20dB(CE standard)
Figure1-3 FM Auto Search Level Adjustment
Figure1-4 AM I.F Adjustment
Figure1-2 IF CENTER and THD Adjustment
SSG FREQ.
Adjustment
point
(TSR1)
98 MHz
BEACON
SENSITIVITY
SEMI-VR(10KΩ)
FM SSG
GND
28 dB
FM SSG
Output
GND
Speaker
Terminal
FM
Antenna
Terminal
Distortion Meter
Input
SET
Input
output
Oscilloscope
FM IN
FM Antenna
SET
TSR1
10KHz
* When adjusting T.H.D., readjust I/F coil on the Tuner Pack.
OUTPUT
Fig1-1. Adjustment location of Tuner Part
Speaker
Terminal
output
Frequency Counter
Figure 1-5
Figure 1-6
In Out
Cassette Deck
Oscilloscope
SET
(GND)
VTVM
V H
SPEAKER
Figure 1-7
Recording /Play head
AZIMUTH control
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 TL11 Aduust for 1.0V±0.1V at the low.
OSC Connect AM signal (IR117)
generator to loop
antenna,VTVM AND
oscilloscope 2 1611KHz 1611KHz -
Check for 7.0V±1.0V at the high.
(Fig 1-3) (IR117)
AM
(MW)
RF “ 1 594KHz 594KHz TL10 Maximum out
DET “ 1 594KHz 594KHz - Check for 1.2V±0.03V at the location NO
ATT:60dB of IC006(104M) after short-circuit IC1(0.47u).
INTER FREQ
“ 1 455KHz 522KHz IFT1 Maximum out
OSC Fig 1-3 1 146KHz TL6 Aduust for
2.0V±0.1V at the low.
LW 2 290KHz -
Check for 7.0V±1.0V at the high.
RF 1 150KHz 150KHz TL9 Maximum out
OSC Fig 1-3 1 2.3MHz TL4 Aduust 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 TL8 Maximum out
OSC Fig 1-3 1 9.5MHz TL3 Aduust 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 TL5 Maximum out
2-2
Samsung Electronics
Loading...