Read Sharp ER-A770 (serv.man9) Service Manual online
CHAPTER 2. MASTER RESET (All Memory Clear)
There are two possible methods to perform a master reset.
MRS-1 (Master resetting 1)
Used to clear all memory contents and return machine back to its
initial settings.
initial settings.
Return keyboard back to default for default kyeboard layout.
PROCEDURE
1) Turn off the AC switch.
2) Set the reset switch to "OFF" position
3) Turn on the AC switch.
4) While holding down MRS-1 key , turn to "ON" the reset switch.
MRS-1 key: The key located on Left upper corner of the key-
board.
5) Enter the password key operation
DISPLAY:
Password input procedure: Press the four corners of the key-
board in the sequence of a, b, c, and
d.
d.
6) Master reset is started.
DISPLAY:
MASTER RESET
7) After completion of the master reset, the buzzer sounds three
times and the following SRV mode display is shown.
DISPLAY:
MRS-1 Key
Keyboard layout
ENTER PASSWOPRD
a
c
d
b
Keyboard layout
MASTER RESET
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