Casio PR-420A

— 5 —
3. OPERATION CHECK
NO. OPERATION DISPLAY NOTE
1
2
3
SHIFT AC
4
5
F6 a
b
/c AC
Press the above keys at the
same time.
1
6
No Display
== Lx375 TEST ==
1. LCD 4. ROM
2. KEY 5. TRS
3. RAM 0. rst
F1
RESET
AC
MAIN MENU
COMP BASE SD REG
MAT GRAPH EQUA PRGM
LINK CONT
RESET
No Display
✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽
✽
✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽
✽
RESET
RESET ALL MEMORIES?
RESET ALLYES NO
✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽
✽
✽
✽
✽
✽
✽
✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽
RESET
ALL MEMORIES!
✽
✽
✽
✽
✽
✽