Rotel RX-203 Bedienungsanleitung Seite 4

CHASSIS
1203 1202L201 e
L201. AM AM AM
IFT
AM
2M.
FT
3rd.
AM IF and RF Alignment Procedure (part I MW Section)
PART l: MWSection (AM/FM,
Instruments: AM Signal Generator and AC VTVM.
Notes: Set Function Selector to AM position.
Generator
Step
Coupling
Pin No. 10
(on IF board).
1
through a 0.01
mfd. capacitor.
Test Loop
2
Radiate signal
into ferrite
loop-stick
antenna
3
4 Repeat step 2 and 3 unit no further improvement is noticed.
GENERATOR
TOP VIEW
(MW PORTION)
CTS CT4
PIN
AM OSC ANT
10
e
IFT OSC
1st.
VR302
Fig. 1. AM IF and RF Alignment
Abb. 1. MW-ZF und HF-Abgleich
Fig. 1. Alignement AM IF et HF (AM/FM, LW/MW/FM)
LW/MW/FM)
Input signal must be kept as low as possible to avid AVC action.
Tuning Dial
Frequency
455KHz (400Hz NO interfering
30% Mod.) at low end of
scale.
600KHz (400Hz
600KHz
Mod.)
dial scale.
1400KHz 1400K
(400Hz 30%
dial scale.
Mod.)
SONAL
LOOI
Hook-Up (AM/FM,
(MW/UKW, LW/MW/UKW)
Adjust
Setting
L202, L203
and L204
(on IF board).
L201 (OSC)
on
and LOOI
(ANT coil)
CT5 (OSC) and
Hz on
CT4 (ANT)
on Front-end.
LW/MW/FM)
Adjust for
Maximum
reading on
AC VTVM.
all