Lincoln Electric IDEALARC SP-255 Service Manual page 90

F-37
KEYPAD REMOVAL AND REPLACEMENT
PROCEDURE
NOTE: BEFORE REMOVING THE KEY-
PAD, PERFORM THE KEYPAD RE-
SISTANCE TEST TO BE SURE THE
KEYPAD IS FAULTY.
1. Disconnect main input power to the
machine.
2. Remove the Case Top and Side Pan-
els with 5/16" nut driver.
3. Disconnect Keypad Plug J2 from the
Control Panel.
4. Remove the two screws holding the
POWER SWITCH and bezel using a
1/4" nut driver.
5. Grasp the upper right hand corner of
the Keyboard and peel it off the front
panel.
a. The back of the Keypad is an ad-
6. Install a new Keypad.
a. Remove the paper backing from
b. Install the new Keypad by care-
TROUBLESHOOTING & REPAIR
hesive material that bonds the
Keypad to the Front Panel.
the new Keypad to uncover the
adhesive backing.
fully pressing the Keypad to the
Front Panel. Be sure to smooth
out any air bubbles that become
trapped under the Keypad.
IDEALARC ® SP-255
F-37