SERVICE MANUAL
LBB 3310/00, 3330/00 and 3331/00 page: 18 Date of issue:
4822 861 11006 July 1998
10.2.7 Audio-Contribution and Audio-Distribution circuit
Noise level
Measure the noise, A-weighted & rms, at AUDIO-DISTR via M3 (pin 3 at X11 or X12), related to M2 (GND): Noise level
(A-weighted): < -70dBV.
X11
+
-
A1
V
Audio-distr.
3
629548 27
25Ω
X205
M3
X150X110
X10
AC
24V DC
Power Supply
90 ... 264V AC
~~
Loudspeaker
PCB CPSU
M110 M111 M121 M122 M124 M150 M151
M2
(GND) (GND) (GND)
LR IN
Rec-INLine-IN Rec-IN Telephone
003_006.cdr
Figure 6
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