copied from the Internet:
From: wrs@Tymnet.com (William Soley)
Newsgroups: rec.radio.amateur.misc
Subject: Re: Alinco DJ-580T undocumented features

In article <1992Jul09.192547.22597@microsoft.com>, 
t-dougf@microsoft.com (Douglas Fields) writes:
|>  after noting that there were features on the
|> DJ-580T that could be accessed by typing keypad numbers with the pad locked
|> (FL symbol on), I went through and tried all 1000 #nnn combinations. I found
|> the following things:
|> 
|> #120:  Prints open/closed on the main band
|> #127:  Same thing as above (or is it #128?)
|> #355:  Just beeps

I also noticed this one:

    #123

This one lets you set the touch tone send rate 1=very fast ... 9=very slow
and 0=even slower (like you'd expect 10 to be).  Every time you access this
code, it adds one to the current value and displays it.  So if all you want
to do is read the value without changing it, you have to enter #123 10 times
to get it to count all the way around (pain).  It keeps separate values for
VHF and UHF.  The RESET procedure will put it back to factory values. 

I also assume you intentionally left out #508 which is in the manual (cross
band duplex).

73's

-Bill N6IGF