SECTION 3
DISASSEMBLY AND OPTION INSTRUCTIONS
3 - 1
• Opening cover
Remove 4 screws from bottom cover.
• OPC-617 connection
• Installation location
Install option units.
OPC-617 ACC CABLE: J4
UT-96 5-TONE UNIT
or UT-105 SmarTrunk II
TM
Logic Board
EX-1761 MEMORY EXPANSION UNIT: J7
OPC-822 INTERFACE CABLE: J501
PIN ASSIGNMENT
Break the jack plate using cutting pliers to connect the
OPC-617.
Pin
No.
Terminal
name
Description
Specification
1
DIM
Backlight control input
+5 to +30 V for dark
2
PAAF
AF output for public
address and Ext SP func-
tions
0 to 330 mV rms/
47 k
Ω
3
DISC
AF output for a terminal
unit
330 mV rms/100 k
Ω
4
IN
AF input for a terminal unit 330 mV rms/1200 bps
5
PTT
PTT control input
0 V for transmit
6
HORN
Grounded when receiving
the specified call
Less than 50 mA
when grounded
7
PAAF –
Ground for PAAF
–––
8
DISC – Ground for terminal output
–––
9
IN –
Ground for terminal input
–––
Connect to J4
Jack plate
OPC-617
OPC-822
UT-96
UT-105
EX-1761
1
5
6
9
J6
