Roland VersaEXPRESS RF-640 Service Notes page 201

Turn on the Sub Power SW while pressing [
4
[ ] keys to enter the Service Mode.
Set up the PET-G on the machine.
Select [PRINT MENU]>[HEAD ADJUST]>[BIAS]>[TEST
5
PRINT] and press [ENTER] key.
Test pattern is printed.
6
The printed test pattern can be fed forward and back-
ward by [
[BIAS ADJUSTMENT]
7
Loosen the three screws fi xing the Head in the order of the
fi gure.
Loosen the screws fi xing the head for 1/2 turn.
If the screws are loosened too much, the adjustment
cannot be done correctly.
], [
] and [ ] keys to be seen easily.
] and
MENU
SERVICE MENU
1
4-22
+
MENU
SERVICE MENU
PRINT MENU
[ ] [ ]
PRINT MENU
HEAD ADJUST
[ ] [ ]
HEAD ADJUST
BIAS
[ ]
BIAS
TEST PRINT
[ ]
<CMYK>
3
2