TS4000 Radio Modem User’s Manual
Appendix F – Internal Jumper Block
95
Appendix F – Internal Jumper Block
The TS4000’s jumper block lies between the radio flex circuit connector and
serial port connector on the top side of the modem circuit board. With the radio
flex circuit connector on the right side of the jumper block, the jumper block will
be oriented as shown below with pin 1 located at the bottom right corner. Unless
otherwise specified by the customer, the TS4000 is shipped from the factory with
eleven jumpers installed as shown below.
Factory Default
Jumper Settings
Port 1 DTR RS232/TTL signal
1
3
5
7
9
11
13
15
25
27
29
17
19
21
23
31
2
4
6
8
10
12
14
16
26
28
30
18
20
22
24
32
CPU I/O
Port 2 DSR 1k pullup
Port 2 DSR pin
Port 2 RI pin
Port 2 RI pin
DC power
DC power
DC power
DC power
Port 2 DSR RS232 signal
Port 1 DSR TTL signal
Port 1 RI pin
Port 1 DTR pin
Port 1 DTR pin
Port 1 RI pin
Port 1 DSR RS232 signal
Port 1 CTS TTL signal
Port 1 RD TTL signal
Port 1 DSR RS232 signal
Port 1 DSR pin
Port 1 DSR 1k pullup
Port 1 DCD TTL signal
Port 1 CTS RS232 signal
Port 1 CTS pin
Port 1 RD pin
Port 1 RD RS232 signal
Port 1 DSR TTL signal
Port 1 DCD RS232 signal
Port 1 DCD pin
Ground
(spare)
TS4000 Jumper Block
Default Factory Settings
Caution: This procedure should be performed on an Electro-Static
Discharge (ESD) safe work surface to insure that the internal circuitry of
the TS4000 radio modem is not damaged.
Instructions for
Accessing the
Jumpers
Remove the four 4-40 x 3/8” hex socket head screws on the outside corners
of the TS4000’s front face plate.
Place the small flat blade screw driver between the front face plate and the
case on the bottom of the radio modem near the serial port 1 connector.
Gently pry the front face plate away from the edge of the case until the front
face plate and radio modem subassembly releases from the thermal pad at
the rear of the case.
Slide the radio modem subassembly completely out of the case.
Remove the two 3/16” hex jack screws holding the serial port 2 connector to
the front face plate.
Using the small flat blade screw driver, gently rock the 50 pin flex circuit
connector out of the connector on the modem circuit board. Rock the
connector by placing the small flat blade screw driver under the brown end
tabs of the connector and against the silver brackets on the sides of the
modem circuit board. Apply pressure to gently lift up each end of the flex
connector, alternating sides until the flex connector pops free of the TS4000