HANDSET
Microphone
I
I
Earphone
PCB (KT1
&
KT4 S ·es
i;
tepho
l
eri
e
ne
(1503) LO Version
R1
c 1
27
PLA3
PLA1
PLA4
PLAS
S1
...I..
[1]
142)
9.w
510
(43)
S2
S3
S4
...I..
...I..
[3]
[4]
- MSKB
TR2
3 2 1 PLB
R4
1K
R10
(41)
1M
Lk A
03
TR1
0 6
5
9.1v c 9
13
[6
143) 10n
RS
[10
9
05
130
100n
B
XU
14
C4
(53)
R6
CB
7
100n
CS
R7
11
10
100
07
33K
(1,3)
SS
S6
S7
SB
S9
S10
[5]
[6]
[7]
[BJ
[9]
[0]
09
R11
135)
010
C15
22n
OUT
SU
I C1 a;1
I N
TMC 1302
REF
OR
osc
TMC 1604 (43)
MIC
RATIO 6
EAR
A
B
[
0
eJ3 01 VDOVSS
1
2
3
4
16
10
(43)
LkC LkO
�
.
�
v
LkF LkH
(1+0)
�
S11
LkG LkJ
Numbers in brae k
J
ts ( l refer to explanatory paragraphs
013
R13
100
s12b1 2
014
015
15V
5
B
P L E2
(42)
P LE1
s12a12
PLF2
SKC PLC
C17
1-}-T
1.B
Q
137)
PLF3
016
3·6V
R15
5·6K
R17
(39)
011
Lkl
L(
SKO
15V
1M
7
1
VDD INPUT
OUT
A
IC2"i'1 OUT B 2
VSS M1503
020
(39)
PLFS
B C 1
BC2
OSC OPTION
4
3
021
L i ne co
Con nee
B
Bell
3
A
5
XL3
=
Tone Caller
rd
tor
R12
LkK
100K
139)
N/C PLF6
PLF1
Batt
Siq]I
PLG 2
)--{�,.,,.,
R1B
(36) 2
u
PLG1
022
lsKF I
33K
PLF4
Ecr-th
6
1
Message
g
'w'aitin
4
FIGURE 3: 1503 LD Version - Circuit Diagram
