Balance Lights; Af Output; Agc; Stereo Decoder - Bang & Olufsen beomaster 2000 Service Manual

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5-4
Balancelys Balance Lights
Skalaen indstilles til 0V mellem 1TP3 & 1TP4.
Adjust the dial to 0V between 1TP3 & 1TP4.
3R40 justeres indtil 3D40 & 3D41 lyser lige kraftigt
Adjust 3R40 until 3D40 & 3D41 glow with identical
strength.
LF output AF Output
En mAlesender tilsluttes antenneindga.ngen Den
Connect a signal generator to the aerial input and set
indstilles pA f.eks. 94 MHz og til at afgive 1 mV EMF,
it to, say, 94MHz and to yield 1 mV EMB L +75 kJlz.
a' +75 wl'
Set the receiver to the same frequency as the signal
Modtageren indstilles pi samme frekvens som generator.
malesenderen
connect an AC voltneter to 1Tp7 and adjust 1R67 to
AC voltneter tilsluttes 1TP7, og 1R67 justeres til
575 mV.
575 mV.
It it possible by means of 2R242 & 2R442, to adjust to
Med 2R242 & 2R442 kan justeres til radio LF niveau
radio AF level as the customer may wish- Both 2R242
efter kundens onske. 2R242 & 2R442 er fra fabrikken
& 2R442 are factory-adjusted for maximum output
justeres til maksimum output De er tilgrengelige fra
They are accessible through the bottom plate.
bunden
AGC (kun type 2919)
AC'C (t]'pe 2919 onty)
En milesender tilsluttes antenneindgange& og
Connect a sigrral generator to the aerial input and set
indstilles til at afgive f.eks. 94 MHz 500 pV EMF
it to, say, 94 MHz and to yield 500 pV EMB A
A.+75 ktrlz.
+75 kEl,z.
Modtageren indstilles pi samme frekvens som
Set the receiver to the same frequency as the signal
milesenderen
generator.
DC volftneter tilsluttes 1IC3 ben 15, og 1R41 justeres
Connect a DC voltrneter to pin 15 of 1IC3, and adjust
til der miles 4V.
1R41 until a reading of 4V is obtained.
Stereodekoder Stereo Decoder
For at denne justering kan foretages korrekt, skal der
In order to make this adjustnent correcfly a frequen-
anvendes en frekvenstaller eller Bang & Olufsen cy counter or a Bang & Olufsen Voltneter RV11 and a
voltrneter RV11 og frekvens probe PFS som beskrevet
Frequency Probe PFS should be used, as explained in
i punkt 1. Hvis omtalte instrumenter ikke er tilgren-
point 1. Should these instruments not be at hand a
gelige, kan der foretages en tilnarmet justering som
fairly good adjustnent is possible by following the
beskrevet i punkt 2. procedures described in point 2.
1. Indstil modtageren pi en mono station (omskifter i
1. Tune the receiver to a mono transmitter (switch in
stilling FM AUTO). FM AUTO mode).
En frekvenstaller (eller RV1VPFS) tilsluttes 1TP6.
Connect a frequency counter (or RV1VPFS) to
Med 1R75 justeres, indtil der mAles 19 kHz
1TP6'
+50 kHz.
Adjust with 1R75 until a reading of 19 kllz
+50 kllz.
2. Indstil modtageren pi en stereo station
2. Tune the receiver to a stereo transmitter.
Potentiometeret 1R75 drejes imod uret (set fra Turn the potentiometer 1R75 counter-clockwise (as
komponentsiden), indtil stereovirkningen lige netop
seen from the component side) until the stereo
ophorer. Derefter drejes 1R75 med uret indtil
effect just ceases to be heard. Next firrn 1R75
stereovirkningen lige netop ophorer.
clockwise until the stereo effect just ceases to be
heard.
Indstil nu 1R75 midt mellem de to stillinger, og der
er opniet en tilnarmelsesvis korrekt justering.
Now adjust 1R75 in the middle between the two
positions, and a fairly correct adjustnent has been
achieved.