SONY 7F 74L Service Manual

Service

EK 100

EK 300 IEM

EK 500

Part 1

Sennheiser electronic GmbH & Co. KG • D-30900 Wedemark • Tel. 0 51 30 / 600-0 Änderungen vorbehalten / Subject to alterations / Sous réserve de modification

EK 100, EK 300 IEM, EK 500

05/00 – 1

TECHNISCHE DATEN

(Werte in Klammern entsprechen typischen Werten)

HF-TEIL

Frequenzbereiche____________________________________________ 518 ... 550 MHz

630 ... 662 MHz 740 ... 772 MHz 790 ... 822 MHz

838 ... 870 MHz Schaltbandbreite ____________________________________________ 32 MHz Empfangsfrequenzen ________________________________________1280 Kanalabstand _______________________________________________ > 400 kHz Frequenzraster ______________________________________________ 25 kHz

1. Oszillatorfrequenz _________________________________________ f

1. Zwischenfrequenz _________________________________________ 110,6 MHz

2. Oszillatorfrequenz _________________________________________ 121,4 MHz

2. Zwischenfrequenz _________________________________________ 10,8 MHz Modulationsart ______________________________________________ FM-Mono; EK 300 IEM: FM-Stereo Nennhub ___________________________________________________ 24 kHz Spitzenhub _________________________________________________ 48 kHz Schaltschwelle der Rauschsperre ______________________________ 0 µV ... 100 µV; 5 dB Schritte S/N=80 dB (unbewertet mit HDX) _____________________________ < 10 µV (6 µV); EK 300: Stereo < 100 µV (60 µV) S/N max (Spitzenhub mit HDX) ________________________________ > 100 dB(A) (117 dB(A))

- 110,6 MHz

NF-TEIL

Kompandersystem __________________________________________ HDX NF-Ausgangsspannung (Nennhub) _____________________________ unsymmetr. 500 mV NF-Ausgangsspannung (Spitzenhub) ___________________________ unsymmetr. 1,3 V

; EK 500: symmetr. 1V

eff

4 dBu;EK 500: 2,6 V

eff

10 dBu

eff

Klirrfaktor bei 1 kHz und Nennhub _____________________________ < 1% (0,3%) NF-Frequenzgang____________________________________________ 50 Hz ... 18 kHz; -3 dB; EK 300 IEM: 50 Hz ... 15 kHz; -3 dB Pegel des Monitorausgangs / Last _____________________________ ausschließlich EK 500/EK 300 IEM: >100 mW / 32 Ω

ALLGEMEIN

Nennspannung ______________________________________________ 9 V Betriebsspannung ___________________________________________ 6,0 ... 10 V Stromverbrauch bei Nennspannung ____________________________ typ. 62 mA Ruhestromaufnahme ________________________________________ < 100 µA (30 µA) Batterie ____________________________________________________ IEC 6LR61 (PP3.6 AM 6.9V-E-Block Alkaline) Zulassung __________________________________________________ D810 008L RF

EK 100, EK 300 IEM, EK 500 05/00 – 2

Änderungen vorbehalten

TECHNICAL DATA

(Values in brackets are typical values)

RF STAGE

Frequency ranges____________________________________________ 518 ... 550 MHz

630 ... 662 MHz 740 ... 772 MHz 790 ... 822 MHz

838 ... 870 MHz Switching bandwidth_________________________________________ 32 MHz Receiver frequencies ________________________________________ 1280 Channel spacing _____________________________________________ > 400 kHz Channel grid ________________________________________________ 25 kHz 1

oscillator frequency _______________________________________ fe - 110.6 MHz

intermediate frequency ____________________________________ 110.6 MHz

oscillator frequency _______________________________________ 121.4 MHz

intermediate frequency____________________________________ 10.8 MHz

Modulation _________________________________________________ FM mono; EK 300 IEM: FM stereo Nominal deviation ___________________________________________ 24 kHz Peak deviation ______________________________________________ 48 kHz Squelch threshold ___________________________________________ 0 µV ... 100 µV; 5 dB steps S/N=80 dB (unweighted with HDX) ____________________________ < 10 µV (6 µV); EK 300 IEM: stereo < 100 µV (60 µV) S/N max (peak deviation with HDX) ____________________________ > 100 dB(A) (117 dB(A))

AF STAGE

Compander system __________________________________________ HDX AF output voltage (nominal deviation) __________________________ unbalanced 500 mV AF output voltage (peak deviation) _____________________________ unbalanced 1.3 V

; EK 500: balanced 1 V

eff

4 dBu;EK 500: 2.6 V

eff

10 dBu

rms

THD at 1 kHz and nominal deviation____________________________ < 1% (0.3%) AF-Frequency response ______________________________________ 50 Hz ... 18 kHz; -3dB;EK 300: 50 Hz ... 15 kHz; -3 dB Monitor level / load __________________________________________ exclusive EK 500/EK 300 IEM: >100 mW / 32 Ω

GENERAL

Nominal supply voltage_______________________________________ 9 V Operating voltage ___________________________________________ 6.0 ... 10 V Current consumption at nominal voltage ________________________ typ. 62 mA Stand-by current_____________________________________________ < 100 µA (30 µA) Battery _____________________________________________________ IEC 6LR61 (PP3.6 AM 6.9V-E-Block Alkaline) Approbation ________________________________________________ D810 008L RF

Subject to alterations

EK 100, EK 300 IEM, EK 500

05/00 – 3

EK 100, EK 300, EK 500 SIGNALFLUSSZUWEISUNG INTERCONNECTOR ASSIGNMENT

EK 100, EK 300 IEM, EK 500 05/00 – 4

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