What Are The Pin-Outs On The Acc-1 Connector - Icom IC-746 Faq

8.4

What are the pin-outs on the ACC-1 connector?

Page 72 of the Instruction Manual has the full scoop. Here is a brief description.
IC-746 FAQ
1 RTTY High
Low
Current
2 GND
3 HSEND Input/Output for HF-6m
When grounded, transmits
Goes to ground when transmitting
Ground level:
Output current:
Input current:
4 MOD Audio input - direct to modulator
Bypasses microphone preamp and VOX
100 mV rms at 10,000 ohms
5 AF Audio output - fixed level
Also monitor output when transmitting
100-300 mV rms at 4,700 ohms
6 SQLS Goes to ground when squelch opens
Current:
7 13.8 V Unregulated connection to main supply voltage
Max Current:
8 ALC Automatic Level Control
0 to -4 V dc yields 0 to 100 w RF output
Page 91 of 113
2003-02-08
> 2.4 V dc
< 0.8 V dc
< 2 ma
-0.5 to 0.8 V dc
< 20 ma
< 200 ma
0.1 ma
1 amp