SERVICE MANUAL
LBB 3310/00, 3330/00 and 3331/00 page: 20 Date of issue:
4822 861 11006 July 1998
10.2.8 LINE-IN to TELEPHONE-OUT, LINE-OUT, INSERTION-OUT Circuit.
Noise level
Measure the noise, A-weighted & rms
, successively at TELEPHONE-OUT (M109), LINE-OUT (M119) and INSERTION-
OUT (M169) all related to M2 (GND):
Noise level (A-weighted): < -84dBV.
629548 27
25Ω
X205
Mx*
Mx Signal
M109
*
M119
M169
Telephone-out
Line-out
Insertion-out
X150X110
X10
AC
24V DC
Power Supply
90 ... 264V AC
~~
Loudspeaker
PCB CPSU
M110 M111 M121 M122 M124 M150 M151
M2
GND
(GND) (GND) (GND)
LR IN
Rec-INLine-IN Rec-IN Telephone
+
-
A1
V
003_008.cdr
Figure 8