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SECTION 3
DISASSEMBLY AND OPTION INSTRUCTIONS
• Opening cover
Remove 4 screws from bottom cover.
• OPC-617 connection
Connect to J4
Jack plate
Break the jack plate using cutting pliers to connect the
OPC-617.
• Installation location
OPC-617 ACC CABLE
OPC-821 AVL CONNECT CABLE
OPC-822 INTERFACE CABLE
UT-96
5-TONE UNIT
UT-103
FFSK Logic Board
UT-105
SmarTrunk
II
TM
Logic Board
UT-109
VOICE SCRAMBLER UNIT (Non-rolling type)
UT-110
VOICE SCRAMBLER UNIT (Rolling type)
EX-1761 MEMORY EXPANSION UNIT
OPC-617
J501
J4
J6
J7
OPC-821
OPC-822
UT-96
UT-103
UT-105
UT-109
UT-110
EX-1761
PIN ASSIGNMENT
1
5
6
9
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
–––
