Functional Test Of The Mode Switch (S240) - Philips CCS 800 Service Manual

10.2.12 Functional test of the mode switch (S240)

Connect a current source of 0.5mA to the control-line CTRL-L1 via M4 Set the "mode switch" (S240) is each position
and measure the voltages at M4 related to M2 (GND)
A1
+
V I
0,5mA
-
Mode switch Measurement values for A1 (V)
position (S240)
Auto-1
Auto-2
Auto-3
Auto-4
Open-1
Open-2
Open-3
Open-4
LBB 3310/00, 3330/00 and 3331/00
4822 861 11006
Trunk
X11
+
CTRL-L1 4
SHIELD
GND
-
S240
Figure 14
9.5
5.8
4.5
3.9
9.5
5.8
4.5
3.9
page: 26
90 ... 264V AC
~ ~
Power Supply
AC
24V DC
PCB CPSU
X10
Loudspeaker
M4
M2
(GND)
M110 M111 M121
X110 6 9 4 8
Line-IN Rec-IN
L
SERVICE MANUAL
X205
25Ω
(GND) (GND)
M122 M124 M150 M151
2 7 2 5 X150
Rec-IN Telephone
R IN
Date of issue:
003_014.cdr
July 1998