Motorola GM950 Manual - Halaman 11
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Halaman Cetak
Radio
J0101
1
2
13
4
10
11
17
18
8
6
5
7
16
3
12
3.13
Electrostatic Transient Protection
Electrostatic transient protection is provided for the sensitive components in the HHCM by diodes
VR0901, VR0921, VR0922, VR0924 - VR0929. The diodes limit any transient voltages to tolerable
levels. The associated capacitors provide Radio Frequency Interference (RFI) protection.
3.14
Jumper Functions
The jumpers are used to adapt the function of the keypad buttons for different keypads.
Introduction/Theory of Operation
Adapter
PCB
J0950
P0951
18
18
17
17
6
16
15
15
9
9
8
8
2
4
1
1
11
14
13
13
14
3
12
12
3
10
16
6
7
7
Cable
HHCM
Connector
J0951
1
12
2
10
3
2
4
3
10
13
11
11
15
8
18
14
5
5
6
6
16
15
7
1
9
4
13
9
12
7
Theory of Operation
Description
INT SPKR+
INT SPKR-
ANALOG 3
PTT
ANALOG 1
ANALOG 2
FLT A+
ON OFF CONTROL
LCD CLCK BUF
SPI DATA BUF
LED CLCK BUF
GND
MIC
HOOK
LED CE
4C.1-5