Samsung MAX-B550 Alignment and Adjustments, Tuner, FM THD Adjustment, FM Search Level Adjustment

1. Alignment and Adjustments

1-1. Tuner

FM THD Adjustment

Output

FM

Antenna

SET

SSG FREQ.

GND

98 MHz

Terminal

Oscilloscope

Adjustment

FM S.S.G

Input

point

FM DETECTOR COIL

Speaker

(FM DET)

www.

Terminal

output

Input

Output

60 dB

Distortion Meter

Minumum Distortion (0.4% below)

(Figure 1-1)

Figure1-1

IF CENTER and THD Adjustment

rtv

FM Search Level Adjustment

FM Antenna

-

SSG FREQ.

98 MHz

28 dB

horvat

Adjustment

BEACON

SET

point

SENSITIVITY

GND

(SVR1)

SEMI-VR(10K￿)

FM S.S.G

FM IN

Output

28 dB(￿￿dB)

* Adjustment Location of Tuner PCB

Adjust SVR1 so that “TUNED” of FLT is

20 k￿

lighted (Figure 1-2)

-

AM(MW)

AM(MW)

LW

AM(MW)

SW1

SW1

SW2

SW2

*Adjust FM S.S.G level to 28dB

ITEAM

OSC

RF

OSC

RF

OSC

RF

OSC

RF

Figure1-2

FM Auto Search Level Adjustment

djReceived FREQ.

522~1611 KHz

594 KHz

146~290 KHz

150 KHz

2.3~7.3 MHz

3.5MHz

9.5~26.1MHz

10MHz

.

MO

MA

LO

LA

LO

MA

LO

MA

Adjustment

hr

point

Output

Maximum

Maximum

Maximum

Maximum

AM(MW) I.F Adjustment

60cm

Output

1~7.0￿￿￿￿V

Output

2~7.0￿￿￿￿V

1~8V￿￿V

Output

1~8V￿￿V

Output

(Fig1-4)

(Fig1-4)

(Fig1-4)

(Fig1-4)

SSG FREQ.

450 kHz

AM IF

Frequency

522 kHz

OUTPUT

AM ANT

IN

MAIN

VT

GND

TESTER

Adjustment

PCB

point

AM IF

AM SSG

Speaker Terminal

450KHZ

Maximum output (Figure 1-3)

INPUT

OUTPUT

VTVM

Oscilloscope

Figure1-3 AM I.F Adjustment

Fig 1-4 OSC Voltage

Samsung Electronics 1-1