Kenwood TK-2217 Service Manual page 30

7. Control System
LCD, keys and channel selector circuit.
The signal from the keys and channel selector are directly
input to the microprocessor, as shown in fig. 11.
CIRCUIT DESCRIPTION /
Channel selector
49
EN1
71
EN2
Fig. 11 Control system / 图 11 控制系统
电路说明
7. 控制系统
LCD, 按键和频道选择器电路。
如图11所示， 来自按键和频道选择器的信号直接输入到微处
理器。
27
PTT
PTT
SW
IC405
CPU
74
SIDE 1
SW1
75
SIDE 2
SW2
LCD
ASSY
TK-2217
29