Siemens 2000 Service Manual

Replacing exciter lamp
The front part 43 of the soundhead casing
opens when the screw 40 is loosened. Lift
the
lever a, Fig. 6, turn the exciter lamp
counterclockwise and withdraw it from its
holder. Insert the new exciter lamp- again
after lifting the lever a - in such a way that
the
positioning pins b, c and d pass through
the
holes provided in the flange of the lamp
base. Then turn the lamp clockwise as far
as it will go and press down the lever a.
With this amplifier the exciter lamp is sup-
plied with pure direct current, due to a
special electronic filter circuit. The voltage
va lue set for the exciter lamp is 3.6 V, to
provide for mains fluctuations.
Connection of microphone
The microphone is connected to socket 65.
This is a low-impedance input suitable for
the direc t connection of microphone
W 27 439-Z 1-A 2. The 1
1
/
2
m long connect1on
l ead may be extended by using the 7
1
/
2
m
long microphone extension cable W 27 439-
ZS-A 1.
Fig 7
Dynamic microphone
wtth card1otd charac
teristic, W 27439-Z 1-A 2
Contact
P1ns 2-3 low-impedance
P1ns 1-2 high-impedance
Transmiss1on range 60-12,000 cps
Discr~minat1on at 180
incidence tn the medium
frequency range 12 db
7

Siemens 2000 Specifications

General

Brand	Siemens
Model	2000
Category	Projector
Language	English