Rotel RX-203 Bedienungsanleitung Seite 6

ICIOI
10
ooz
L203 L202 LTI
L 201.
AM IF and RF Alignment Procedure (Part II LW Section)
PART II: LW Section (LW/MW/FM
Instruments: AM Signal Generator and AC VTVM.
NOTES: Set Function Selector to LW position. Input signalmust be kept as low as possible to
avoid AVC action.
Generator
Step
Coupling
Pin NO. 10 (on
1 IF PCB thru. a
0.01 mfd capacitor
Test Loop
2
Radiates Signal
into ferrite loop
stick antenna
3
4 Repeat step 2 and 3 until no further improvement
*NOTES: After adjustment, check to make sure that, indeed, both LW and MW alignment are in the best state.
Otherwise repeat LW and MW alignment procedure until no further improvement is noticed. (LW/MW/FM
only)
SIGNAL
GENERATOR
CT5 CTG
Fig. 2. AM IF and RF Alignment
Abb. 2. MW-ZF und HF-Abgleich
Fig. 2. Alignement AM IF et HF (LW)
only)
Tuning Dial
Frequency Setting
455KHz (400Hz No inter fering
Mod.)
at low
Scale
160KHz (400Hz
160KHz
Mod.)
scale
330KHz (400Hz 330KHz
30% Mod.)
scale
is noticed.
CHASSIS
(LW PORTION )
CT 7
LW OSC
Hook-Up (LW)
(LW)
Adjust
L202, L203 and
L204 (on IF
end of
Board)
L701 (OSC)
on dial
LOOI (ANT coil)
CT7 (OSC)
on dial
CT6 (ANT)
SIDE VIEW
CT6
LW ANT
L701 S
LW OSC
Adjust for
Maximum reading
on AC VTVM