SAMSUNG RCD-495
Service Manual

Alignment and Adjustments

IF GENERATOR

TUNER PART
EXT FM antenna : FTP1 75� Dummy SET
GND

Oscilloscope

PIN 19 OF FIC1 O GND O Input o output o FTP1 BODY O

FM SSG

GND

Speaker OUT

VTVM

GROUND O FTP2
Stereo Modulator (Pilot 10%)

OUT

3.2 ohm load

Fig 1-2
1-1-4 AM Adjustment
Step Item Intermediate frequency (IF) adjustment AM frequency coverage adjustment Connection SSG.FREQ. FREQ. Setting Adjust. Point Tune to the lowest Tune to the lowest Tune to the highest 600 KHz 1400 KHz AM IFT : IT 1(WHT) AM OSC COIL : OT 1 Remark

Fig 1-3
1-1-5 MW/LW
Step Item Intermediate frequency (IF) adjustment AM frequency coverage adjustment Fig 1-5 Connection SSG.FREQ. FREQ. Setting Adjust. Point Remark

1

Figure 1-5

455 KHz

Maximum output Best responding point of SSG

1

IF is the same as 2 band�s
Tune to the lowest Tune to the highest 600 KHz 1400 KHz Tune to the lowest Tune to the highest OT1 VC4 AM ANT COIL VC3 OT2 Best responding point of SSG Best responding point of SSG Maximum output Maximum output Best responding point of SSG Best responding point of SSG Maximum output

2 3 4 5

Figure 1-4
Connect DC voltmeter to AM VT(OR10) and GND

515 KHz 1680 KHz (1780)KHz 600 KHz 1400 KHz

2 3 4 5 6

515 KHz 1680 KHz 600 KHz 1400 KHz 145 KHz

OSC TRIMMER Best responding : VC4 point of SSG AM ANT COIL
Maximum output

AM tracking adjustment

Figure 1-5 -

ANT TRIMMER Maximum output : VC3

AM tracking adjustment

Fig 1-5

LW frequency coverage adjustment Fig 1-5

7
AM VT(OR10)

295KHz

OCT4

SET
GND

Input
DC Voltmeter

8

LW tracking adjustment Fig 1-5

170MHz 250 MHz

170 MHz 250 MHz

LW ANT COIL

Figure 1-4
VTVM AM Signal Generator
Test Loop Antenna IN OUT AM-ANT Speaker Terminal

Oscilloscope

9

Not required

SET
60 cm GND

Dummy Load(3�)

Figure 1-5 1-2 Samsung Electronics