SAMSUNG MAX75sef, MAX72, MAXN75SESA Schematics

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SAMSUNG MAX75sef, MAX72, MAXN75SESA Schematics

1. Alignment and Adjustments

1-1 Tuner

* Adjustment Location of SW Band

* Adjustment Location of LW Band

FM THD Adjustment

SSG FREQ.

98 MHz

Adjustment

point FM DETECTOR COIL (TL3)

 

 

60 dB

Output

 

 

 

Minumum Distortion (0.3% below) (Figure 1-1)

Output

FM

 

 

Antenna

SET

 

GND

 

Terminal

 

 

 

 

 

FM S.S.G

 

Input

Oscilloscope

 

 

 

Speaker

 

 

 

Terminal

output

Input

 

 

 

 

Distortion Meter

Figure1-1 IF CENTER and THD Adjustment

FM Search Level Adjustment

SSG FREQ.

 

98 MHz

 

 

 

 

Adjustment

 

BEACON

point

 

 

SENSITIVITY

 

(TSR1)

 

SEMI-VR(5KΩ)

 

 

 

 

 

 

 

 

 

 

 

 

 

Output

 

 

 

23 dB

 

 

 

 

 

 

Adjust TSR1 so that “TUNED” of FLT is lighted (Figure 1-2)

*Adjust FM S.S.G level to 23dB

AM(MW) I.F Adjustment

SSG FREQ.

450 kHz

 

 

Frequency

522 kHz

 

 

Adjustment

AM I.F COIL

point

(TL2)

 

 

 

Maximum output (Figure 1-3)

 

23 dB

FM Antenna

 

 

SET

FM S.S.G

GND

FM IN

 

5 kΩ

Figure1-2 FM Auto Search Level Adjustment

 

60cm

 

 

 

TL2

OUTPUT

AM ANT

IN

 

AM SSG

 

Speaker Terminal

450KHZ

 

 

 

INPUT

OUTPUT

 

VTVM

Oscilloscope

Figure1-3 AM I.F Adjustment

Samsung Electronics

1-1

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