[Amps] Kenwood TL-922

[DC]

I am going to look at a TL-922 very soon, as a temp replacement for my Henry 
while its in the shop.   I have no history on this amp except it has been 
idle for a year or more.
How is this amp keyed?
I need to know what to look for in this amp to spot abuse, misuse, crappy 
mods, etc.
Should I plug it in asap?  I have never operated a tl-922 does it have any 
odities or bad chacteristics that I need to watch for?
How would you test this amp if you were the perspective purchaser?
The price is right so even if it is inoperative I can't get hurt.

thank you
73
KD8Z at ARRL.NET
Dale Clark