Terminal Function - Kenwood TK-3202 Service Manual

TK-3202
CIRCUIT DESCRIPTION / TERMINAL FUNCTION
7. Control System
Keys and channel selector circuit.
The signal from the keys and channel selector are directly
input to the microprocessor, as shown in Fig. 11.
Channel selector
50
49
48
47
46
Fog. 11 Control system
10
27
IC405
PTT
PTT SW
CPU
EN1
74
PF1
EN2
(SIDE 1)
S2
EN3
EN4
75
PF2
EN5
(SIDE 2)
S3
CN401
Pin No. Name I/O
1 B I B (Battery Voltage)
2 SB O Switched B
3 SP1 I Audio input
4 SP2 O Audio output
5 GND - GND
6 EN1 I Encoder pulse input
7 EN2 I Encoder pulse input
8 GND - GND
9 EN3 I Encoder pulse input
10 EN4 I Encoder pulse input
11 EN5 I Encoder pulse input
Function