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help. fj740 "service mode protected" message!

boggiom72

New Member
I have to replace a head to a hi fi pro II jet740.
when I try to access service mode it appear "service mode protected"

I bought it use and if there is any password to input at any time I don't have it and cannot retrieve it...(it was never asked anyway)

any ideas?

Also. On the new head I have two series of number. the first composed of 7 digit mixing numbers and letters.

The second just letters.
The first is the one looking more like the one on the service manual...
That's my ranking number, right?

Thanks in advance!
m
 
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