5: Testing and Troubleshooting
TW7201I-MS
5-9
12
R3
Row matrix data
13
R4
Row matrix data
14
R5
Row matrix data
15
R6
Row matrix data
Table 5-7 Front Panel Processor J7 Pin Assignments
Pin
Signal
Description
1
GND
Chassis ground
2
PWR ON\
Power status (active low)
3
SQA
Squelch receive audio (top of pot.)
4
RXAUDVOL
Volume-controlled receive audio (wiper of
volume potentiometer)
5
GND
Chassis ground
Table 5-8 Front Panel Processor J8 Pin Assignments
Pin
Signal
Description
1
GND
Chassis ground
2
CLCA
Clarifier control A
3
CLCB
Clarifier control B
Table 5-9 Front Panel Processor J9 and J10 Pin Assignments
Pin
Signal
Description
1
GND
Chassis ground
2
RX AUDIO
Receive audio
3
PTT
Press-to-talk signal
4
TX AUDIO
Transmit audio
5
CW KEY
CW key input
6
+12V
Unreg12 Vdc
Table 5-6 Front Panel Processor J6 Pin Assignments
Pin
Signal
Description
Summary of Contents for TW7201I
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Page 86: ...TW7201I MS Figure 5 4 DHSL Modem Board Schematic Diagram 994184 Rev E 5 25 ...
Page 99: ...TW7201I MS Figure 5 6 Power Supply Interface Schematic Diagram 994222 Rev D 5 39 ...
Page 104: ...TW7201I MS TW7201I MS Figure 5 8 Switching Board Schematic Diagram 994149 Rev A 5 45 ...
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