Beomaster 1900 Schematics version2
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Extracted text from Beomaster 1900 Schematics version2 (Ocr-read)
Page 2
MALEBETINGELSER FOR
DIAGRAM:
CONDITIONS OF MEASUREMENT FOR
DIAGRAM:
MESSBEDINGUNGEN FUR
SCHALTBILD:
JUSTER I NG AF TOMGANGSSTROM:
ADJUSTMENT OF NO-SIGNAL
CURRENT:
Alle DC spandinger er malt i forhold til stel med voltmeter (lndre modstand
Bang&01ufsen
ll MOhm).
DC spaendinger uden parentes er malt med modtageren i stilling FM 5 og an-
tennesignal pa 500 [1V (1 mV EMK) med pilottone.
Volume i stilling MEDIUM 0g hojttalere ikke tilsluttet.
DC spaendinger i parentes pa 2IC9 er malt, nér et af betjeningsfelteme aktiveres.
DC spaendinger 1' parentes pa 2TR30, 2TR31 0g 2TR32 er malt i stilling STAND
BY.
FM signalniveauer er malt ved A f 40 kHz, f mod. 1 kHz og antennesignal pi
500 pV (1 mV EMK).
LF folsomheder er malt ved 30 W output. Balance, bas, diskant pa 0, volume per 5
max. Udgang belastet med 4 Ohm, input 1 kHz.
A11 DC voltages are measured in proportion to chassis with voltmeter (inner
resistance 11 M Ohm).
DC voltages without brackets are measured with the receiver in position FM 5
and aerial signal 500 [1V (1 mV EMK) with pilot signal.
Volume in position MEDIUM and speakers not connected.
DC voltages with brackets on 2IC9 are measured when one of the operating
fields is activated. DC voltages with brackets on 2TR30, 2TR31 and 2TR32
are measured in position STAND BY.
FM signal levels are measured at Af 40 kHz, f. mod. 1 kHz and aerial signal
500 uV, (1 mV EMK).
LF sensitivities are measured at 30 W output. Balance, bass, treble on 0, volu-
me 011 max. Output loaded with 4 Ohm, input 1 kHz.
Alle DC Sparmungen sind im Verhaltnis zu Chassis mit Voltmeter (innerer Wi-
derstand 11 M Ohm).gemessen.
DC Spannungen ohne Klammern sind mit dem Empfanger in Stellung FM 5
und Antennensignal von 500 pV (1 mV EMK) mit Pilotton gemessen.
Volume in Position MEDIUM und Lautsprecher nicht angeschlossen.
DC Spannungen in Klammern auf 2IC9 sind gemessen, wenn eines der Bedie-
nungsfelder aktiviert wird.
DC Spannungen in Klammern auf 2TR30, 2TR31 und 2TR32 sind in Position
STAND BY gemessen.
FM Signalniveaus sind bei Af 40 kHz, f. mod. 1 kHz und Antennensignal von
500 uV (1 mV EMK) gemessen.
LF Empfindlichkeiten sind bei 30 W Output gemessen. Balance, Tiefton, Dis-
kant auf 0, Volume auf max. Ausgang mit 4 Ohm belastet, Eingang 1 kHz.
,«\
Tomgangsstrommen justeres medens modtageren er kold og med neddrejet vo-
lume kontrol. Hejtralere ma ikke vasre tilsluttet.
Med 2R249 (2R349) justeres til 25 mA i kollektoren af ZICZOO (21C300) eller
- 12 mV over 2R256 (2R356).
Nar modtageren har vaeret taendt 10 minutter, med neddrejet volume kontrol,
kontrolleres tomgangsstrommen og justeres igen til 25 mA eller 12 mV over
emittennodstanden.
The Ito-signal current has to be adjusted while the receiveris cold and with the
volume control turned down. The loudspeakers must not be connected.
With 2R249 (2R349) adjust for 25 mA collector current of 2IC200 (ZICBOO)
or 7 12 mV across 2R256 (2R356).
When the receiver has been switched on for 10 minutes, with the volume con-
trol turned down, the no-signal current is checked and readjusted for 25 mA
or 12 mV across the emitter resistor.