Samsung RCD-750 - 3-Band (FM;SW;AM) Adjustment Procedures

7-1-3. 3 BAND (FM/SW/AM) AM/SW adjustment
SIGNAL GENERATOR DUMMY
MAIN PCB
ANT
RCD-750
FIG.6 SW dummy ANT
ITEM CONNECTION STEP| S.S.G. RADIO DIAL Adjustment REMARK
Frequency | SETTING point
t—
IF IF is the same as 2 band's
AM OSC Best
. 1 515KHz Lowest frequency coil (RED) resonating
AM
Fig.4.
OT101
point
of
SSG
coverage
AM OSC Best
2 1650KHz | highest frequency trimmer _ resonating
OCT4 point of SSG.
3 Repeat steps 1 and 2 several times
NEEM: Maximum
4 600KHz 600KHz COIL SutDlit
AM
Fig4
OL
102
tracking AM ANT secs
5 1400KHz 1400KHz trimmer VC3 eer
(VARICON) one
6 Repeat steps 4 and 5 to obtain suitable
sensitivity at 6(00KHz and 1400KHz
Connect AM(SW) SW OSC Best
signal generator 7 5.7MHz Lowest frequency COIL (GRN) resonating
SW to SW ANT terminal OT102 point of SSG
frequency (FTP1)thru SW
coverage dummy ANT and SW OSC Best
speaker output to 8 18.5MHz | highest frequency trimmer VC4 resonating
VTVM across (VARICON) point of SSG
4 ohm load.
(see Fig.5 Fig.6) 9 Repeat steps 7 and 8 several times
SW ANT Maximu
10 7MHz 7MHz coil ne al
;
:
OL
101
SW Fig.5, Fig.6 t— t
tecelng 1 15MHz 15MHz NO
ADJUSTMENTS
12 Repeat steps 10 and 11 to obtain suitable
sensitivity at 7MHz and 15MHz
SW
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