Chapter 2 INSTALLATION
15. Flash ROM Vpp Select Jumper (JVROM1)
This jumper selects Vpp for the Flash ROM. By default, it's set to +5V (pins
1-2). Moving the jumper cap to pins 2-3 sets the Vpp to +12V. If you
change the ROM chips, you should check the specifications to be sure you
set the right value.
EP-PI11 User’s Manual
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Pin #3 (+12V)
JVROM1: Flash ROM Vpp
Pin # 1 (+5V)