User Manual
PBL UHF 1 & 2 Air Interface
Maintenance Handbook
H/book Number:-60-055900HBKM
Issue No:-1
Date:-13/02/2003
Page:-49 of 49
5.1.6.4 Drg. No. 12-002270, 3 Stage Alarm Board Circuit Diagram
3 STAGE AMPLIFIER ALARM BOARD
CIRCUIT DIAGRAM
12-002270
1
N.T.S
MRB 11/8/93
BYDATEDESCRIPTIONNo
ISSUE
1 2 3 4 5
6
7 8 9
10 11 12
13
14
15
16
17 18
A
B
C
D
E
F
G
H
I
J
K
L
M
A
B
C
D
E
F
G
H
I
J
K
L
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
17
18
M
UNLESS OTHERWISE STATED
ALL DIMENSIONS ARE IN mm
DRAWN
CHKD
CUSTOMER DRAWING No
PERMISSIBLE ONLY IF EXPRESSLY AUTHORISED IN WRITING
THIS IS A PROPRIETARY DESIGN OF AERIAL FACILITIES LTD.
NO DECIMAL PLACE ± 1mm
TWO DECIMAL PLACES ± 0.1mm
ONE DECIMAL PLACE ± 0.3mm
BY AERIAL FACILITIES LTD.
REPRODUCTION OR USE OF THIS DESIGN BY OTHERS IS
APPD
DATE
TOLERANCES SCALE
Tel : 01494 777000
Fax : 01494 777002
Aerial Facilities Limited
England
TITLE
1
A
+
-
IC1
+
-
IC1
+
-
IC1
+
-
IC1
CONN11
TTL ALARM
CONN
+5v TTL IN
12
CONN
0V
15
CONN
ALARM 0v
14
CONN
O/C ALARM
13
7
+8v TO +30v
CONN
1 CONN
CONN2
CONN3
CONN4
CONN5
CONN6
MONITOR 1
INPUT
HI LOW HI
MONITOR 2
INPUT
LOW HI
MONITOR 3
INPUT
LOW
9 CONN
CONN10
CONN8
CONTACTS
ALARM
R1
1K8
+
-
IC3
5
6
7
R2
120R
R3
120R
R4
3K6
R6
100K
R5
100K
R7
100K
R9
1K
2
3
1
+
-
IC3
4
11
R11
1K
100K
R15
1K
R17
100K
R23
100K
R22
1K
R19
100K
R14
100K
R13
100K
R21
R25
1K
R27
1K
R37
2K4
R39
560R
R26
270K
270K
R18
R24
100K
R28
270K
R20
270K
R16
100K
R10
270K
R8
100K
R12
270K
R42
4K7
R29
4K7
R35
1K
R40
2K2
R41
22K
R38
1K
R36
3K
2K2
R30
4K7
R32
4K7
R34
10K
R33
10K
R31
TR3
BCW71BCW71
TR2
BCW71
TR1
6
5
7
+
-
IC2
10
9
8
+
-
IC3
3
2
4
11
1
12
13
14
+
-
IC3
+
-
IC2
12
13
14
10
9
8
3
2
4
1
11
+
-
IC2
+
-
IC2
5
6
7
10
9
8
12
13
14
D1
1.23v
SR12D
+
C1
1uF
C2
100n
1u
C7
100n
C3
100n
C4
1.0
C8
3v3
D9
TR6
FZT751
TR4
BCW71 BCW71
TR4
100n
C6
LK2
D7
D6
LK1
D4
D5
D2
D3
D8
LED1
REL
-
RL1
+
OP AMP
6
7
RL1/2
8
+7.5v
+7.5v
2
+7.5v +7.5v
VCC VCC
0v 0v
CR0508 14/1/94 MRB
IC1 , IC2 & IC3 = LM324AM
ALL DIODES = LL4148 UNLESS MARKED OTHERWISE
4
RL2/2
3
2
NOT USED
VCC
PRODUCTION ISSUE 11/9/93 MRB
PRODUCTION ISSUE 29/8/00 MNR
2
2A
0v
RB RB