Wurlitzer PRINCESS - External speaker connection; External amplifier connection

External speaker connection
PRINCESS – Edition: 17.02.2005
56
FIELD SERVICE MANUAL
12.11 External speaker connection
The amplifier can operate in two diffe-
rent modes. The normal operation
mode reproduces the music in normal
stereo sound. So external speakers
can be added to each channel.
The so-called 2-Channel mode uses
both stereo channels like separate
mono amplifiers so that the sound can
be reproduced in different rooms but
then in mono only.
The amplifier may not be loaded with
more than 4 ohms per channel (less
ohms means more load!). On an over-
load it switches itself off. After a cer-
tain cool down time it switches itself
on. So if you do not eliminate the re-
ason for the overload the amplifier
produces continuously volume drop-
outs.
The impedance of all external spea-
kers per channel in ”Stereo” mode
should not be less than 4 ohms.
The amplifier applies approx. 55 watts
(rms on max. 1% dist.) on a 4 ohms
speaker per channel, 18 watts to a 12
ohms speaker and approx. 9 watts to
a 24 ohms speaker. That means, that
e.g., a 12 ohms speaker connected to
the external channel at Dual Channel
operation must be a type of at least 18
Watts, otherwise the speaker is in
danger of destruction at higher volu-
mes. Note that speaker groups like in
hi-fi boxes may have, at certain fre-
quencies, impedance much lower than
their rating. Make sure that all spea-
kers are connected in correct polarity.
Position of the Stereo - Mono DIP switch (1), the mode
switch in the 6 sw.group (2), the stereo - 2 channel
switch (3) and the external speaker terminals (4).
CAUTION
TO REDUCETHE RISK
OF FIRE REPLACE ONLY
WITH SAMETYPE AND
RATING FUSE
Bass Treble
BGM
M
S
ONO
TEREO
ANAL HANNEL
TEREO
2-K / 2-C
S
S
F
ICHERUNG
USE
F1-F4
100-240V
50Hz/60Hz
117 V
60Hz
3,0 AMP
250 V AC
SLOW BLOW
T4A
30V~
AC
F1
26V~
AC
F2
26V~
AC
F3
12V=
DC
F4
IL
NTERNER AUTSPRECHER
NTERNAL PEAKER
IS
O
O
PTION
PTION
R
L
E
L
E
S
8 / 80 W
XTERNER AUTSPRECHER
XTERNAL PEAKER
W
CD-T
CD-T
RAFO
RANSFORMER
B-TUBBLE UBES
N
T
ETZTRAFO
RANSFORMER
E
E
RWEITERUNG
XTENSION
F
RC
ERNREGLER
EMOTE- ONTROL
RS 232
BGM
I
R
I
R
NFRAROT- EGLER
NFRARED- EMOTE
A
O
LR
USGANG
UTPUT
E
CD
ICD
LR
INGANG
NPUT
E
E
300mV
XTRA
XTRA
E
300mV
I
LR
INGANG
NPUT
M
M
IKROFON
ICROPHONE
M
M
ECHANIK
ECHANISM
DA
RC
ECKEL BNEHMEN
EMOVE OVER
DA
RC
ECKEL BNEHMEN
EMOVE OVER
AVC
RS232
M
ICRO
TAPE
MUTE
A/DNZEIGE ISPLAY
BGM
ok.
S/SCHALTER WITCHES
A/OUS FF
A/OUS FF
E/OIN N
E/OIN N
A
A
VC
VC
MODES
TEREO 2-K /2CANAL HANNEL
INPUT
CD
TAPE
BGM
1
1
3
5
2
2
4
6
I
C1
ntern
hannel
E
C
xtern
hannel
2
Verstärker K 99 0056041
Amplifier K 99 C-UL 0058484
1
3
4
2
SEPARATE
NORMAL
AUTO
VOLUME
RS232
MUTE
HIGH LOW
PARALLEL
SERVICE
AUS/OFF
DIP switch “Mode”, slide switch Stereo-2channel and Mono-Stereo switch
in position STEREO
R
L
Terminal
L-extern
Terminal
R-extern
2channel-
stereo
slide switch
DIP switch
2C
“Mode”
Stereo
Normal operation mode (Stereo)