UP-600, UP-700 (serv.man31). UP600 700 Latest FAQ's (Portrait style printer friendly) (May 2005) - Sharp ECR FAQ (repair manual). Page 107

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UP-600/700 Frequently Asked Questions
UP-600/700 Frequently Asked Questions
The UP-600/700 is  locked out and the word
“OFF” is displayed on screen, this happened
when the mode switch position was being
changed.
This solution to this is to install SSP-005, this only
applies to main ROM's version 1A and 1B.
Please refer to Technical update on the Web
Please refer to Technical update on the Web
Firmware
Firmware
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