I'm not really "certified" to work on Sharp equipment but from what I understand their Service Mode is called "Simulation Mode".
To get into Simulation Mode you'll want to do the following:
1) Copy mode key ON → Program key ON → Asterisk (*) key ON → CLEAR key ON → Asterisk (*) key ON → Ready for input of a main code of simulation 2) Entering a main code with the 10-key → START key ON 3) Entering a sub code with the 10-key → START key ON 4) Select an item with the scroll key and the item key. 5) The machine enters the mode corresponding to the selected item. Press START key or EXECUTE key to start the simulation operation. To cancel the current simulation mode or to change the main code and the sub code, press the user setup key. ∗ Canceling the simulation mode to return to the normal mode 1) Press CA key.
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