SAMSUNG SCM6700 Alignment and Adjustments

4. Alignment and Adjustments
4-1 Tuner

CSVR801

CCON801

ISVR2

ISVR1

IT2

OT1

OT2

OCT2

OCT4

OCT3

OL2

OL1

TCON1

OCT1

IT1

KT431

FM T.H.D Adjustment

SSG FREQ. 98MHz
Adjustment

point FM DETECTOR COIL

(IT1)

Minumum output(Figure 4-1)

FM Search Level Adjustment

SSG FREQ. 98MHz
Adjustment

point SEMI-VR(50KB)

(ISVR1)

"TUNED" is shown on LCD(Figure 4-2)

FM
Antenna
Terminal

Speaker
Terminal

Input

Input

Figure 4-1 IF CENTER and T.H.D Adjustment

Figure 4-2 FM Auto Search Level Adjustment

Output

Distortion Meter

Oscilloscope

Oscilloscope

FM antenna

FM SSG

FM SSG

GND

30dB

75Ω
Dummy

50Ω
Dummy

FM IN

FM Antenna

SET

50 kB

SET

Output
GND

FM Stereo Adjustment

SSG FREQ. 98MHz
Adjustment

point SEMI-VR(5KB)

(ISVR2)

L-CH/R-CH : Maximum(Figure 4-3)

Figure 4-3 FM Stereo Separation Adjustment

EXT

FM
SSG

Stereo
Modulator
(Pilot 10%)

Speaker
terminal

SET

GND

OUT

VTVM

5KB

4-1Samsung Electronics

Step

Item

Connection SSG.FREQ.

FREQ. Setting

Adjust. Point

Remark

Maximum
output

Maximum output

Maximum output

1

Intermediate
frequency (IF)
adjustment

AM frequency
coverage
adjustment

Figure 4-5

Figure 4-4
Connect DC

voltmeter to TCON1
and GND(TP1)

522 KHZ

522 KHZ IT 2

OT 1

OCT 2

OL 1
OCT 1

9V

0.9V

522 KHZ

594 KHZ
1404 KHZ

1611 KHZ

594 KHZ

1404 KHZ

Figure 4-5

_

_

_

Repeat step 2 and 3 serveral times

Repeat step 5 and 6 several times

AM tracking
adjustment

Figure 4-4 AM Frequecny Coverage Adjustment

Figure 4-5 AM Tracking Adjustment

SET

TP2

DC Voltmeter

Input

TP1

AM Signal
Generator

Test Loop
Antenna

AM
Loop Antenna
Jack

Speaker
terminal

GND

Oscilloscope

VTVM

IN

OUT

SET

60 cm

Samsung Electronics4-2

Alignment and Adjustments

2
3

4
5
6
7

4-1-1 Test Equipment

1. AM Standard Signal Generator (S.S.G) : 400Hz, 30% MOD

2. Oscilloscope

3. VTVM

4. Frequency counter

5. Loop antenna

6. Dummy load (4½)

7. DC voltmeter

4-1-2 Pre-Adjustment

1. Check the source voltage.

2. Set function and band switches to the band to be aligned.

3. Set the equalizer, volume and balance controls to mid position.

4-1-3 AM Adjustment