Roland VersaUV LEJ-640 Service Notes page 152

Remove the Battery on the Main Board by pushing it down
3
and tilting towards right.
Replace the Battery with new one.
4
Be careful with the direction of the Battery.
Turn on the Main Power SW and turn on the Sub Power SW
5
while pressing the Left, Right and Down keys to enter the
Service Mode.
Select [SUB MENU] > [CLOCK] > [TIME], and set the time
6
and press [ENTER] key.
The display of [B], which shows a battery exhaus-
tion, disappears by this step.
Socket
Socket
MENU
SERVICE MENU
SERVICE MENU
SUB MENU
3-78
1
2
Main Board
Battery
Main Board
+
MENU
SUB MENU
CLOCK
[ ]
CLOCK
TIME
[ ]
TIME
00:00:59 B
[ ]
TIME
13:01:59 B
[
ENTER
[ ]
]