Rotel RX-603 Bedienungsanleitung Seite 6

AUDIO
GENERATOR
O
MAIN
AM p
o
VR603
AM AlignmentProcedure
Instruments: AM Signal Generator and AC VT V M.
Notes: Set Function Selector
Input signal must be kept as low as possible to avoid AGC action.
Generator
Step
Coupling
Pin No. 23 (on
IF board)
1
through a 0.01
mfd capacitor.
Test Loop
Radiate signal
2 into ferrite loop-
stick antenna.
3
Repeat steps 2 and 3 until no further improvement
4
MODEL
AUX
PCB TOP VIEW
RY701
VR604
Fig. 2. Overload Protection
Abb. 2. UberlastungsschutzpegeI-EinsteIlung
Fig. 2. Réglagedu niveau de protection contre Ia surcharge
switch to AM.
Tuning Dial
Frequency
455kHz (400Hz
Non interfering
30% mod.)
at low
scale.
600kHz (400Hz 600kHz
30% mod. )
1400kHz (400 1400kHz
Hz 30% mod.)
L-CH
RX-603
R-CH
o
Level Adjustment
Output Indicator
Setti ng Connected
AC VTVM
end of TAPE OUT jack.
is noticed.
6
APPLY 1,000Hz (SINE
SIGNAL TO AUX JACK
ROTATE AND SET
CONTROL TO OBTAIN
READING ON AC
ADJUST POTENTIOMETER
(VR604 FOR R-CH ) SO THAT
OVERLOAD PROTECTION
IS JUST DISENGAGED
Adjust
to
to L204 and L203
(on IF board)
L202 (OSC)
(on IF board)
and L002 ANT.
Coil.
CT5 (OSC) and
CT4 (ANT) Trim
(on Front-end)
AC VTVM
O
WAVE )
VOLUME
21 VOLTS
VTVM
VR603
RELAY
Adjust for
Maximum
reading on
AC VTVM.