TMC KT1 Series, Руководство пользователя

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l1nally-�
keys 0 to 9,11,#& R
PCB
!KT1 I' KT4 Series Telephone
I
Message
Wait
in.l
�
2
B .,;,,.
S
A \Ire
Protection
Circuit
TM[
IC 1
Lne
Cord
[Dn"l.'<tor
11aii Control
Integrated
Crcu�
Os<Kla!tr
��
Cin:uit
Voiune
Control
,-
-
-
-
-
'
1.
Bell
Capacitor
I,
CrCUJt
___
Bell
I�
IC 2
Ten Cillor
Tone
Caller
Capsule
6 not used
PRINCIPLE OF OPERATION
9 The electronic circuit is centred on the specially
designed TMC circuit which provides a
comprehensive range of functions.
10 In the KT1 and KT4 Series telephones,
associated components and links may be selected as
required to suit various options (refer to the circuit
descriptions below), and to the appropriate circuit
diagram.
11 The keypad has been developed for positive,
speedy, smooth action. The rubber mat conductive
contacts directly operate the touch responsive
switches on the PCB. The setting of these switches
is monitored by the main. control IC.
TABLE 1
IC1
IC2
TMC 1302
Texas TCM 1 51 2P/Ferranti
TMC 1302/TMC1 604
TMC 1503
TMC 1317
Texas TCM 1 51 2P/Ferranti
TMC1317/TMC1617
TMC 1503
TMC 1317
Texas TCM 1 51 2P/Ferranti
TMC1317/TMC1617
TMC 1503
351 3 300 05070
5
1 2 Figure 1 shows the principle of operation in
block diagramatic form. A more detailed circuit
description is given in the following paragraphs.
CIRCUIT DESCRIPTIONS
1 3 In order to identify the appropriate circuit
diagram and descriptive text for any particular
instrument, examine the integrated circuits IC 1 and
IC2, and check for the presence of TR3 and TR5. The
references in table 1 may then be used to identify the
appropriate variant.
CIRCUIT IDENTIFICATION
Circuit Text
TR3 & TR5
Diagram Paragraph
No
2 14
No
3 34
No
4 54
No
5 71
Yes
6 89
(See Fig. 7)
7
107