Thermal Arc ARCMASTER 185 AC/DC, Operating Manual, Page: 57 / 74

ARCMASTER 185 AC/DC
Feb r ua r y 20, 2006
11-3
C) Access the VRD cont r ol by gently p r ying back the f r ont panel cont r ols to r eveal the VRD ON/OFF potentiomete r .
(see Figu r e 11-3)
D) Tu r ning the VRD ON/OFF. (see Figu r e 11-3)
• To tu r n VRD ON: r otate the t r im potentiomete r on the display PCB fully clockwise. When VRD is tu r ned ON check
that it ope r ates as pe r VRD Specifications on page 11-1.
• To tu r n VRD OFF: r otate the t r im potentiomete r on the display PCB fully counte r -clockwise.
CAUTION
DO NOT pull back the f r ont panel with excessive fo r ce as this will unplug cont r ol PCB. Plugging the cont r ol
PCB back into the f r ont panel cont r ols can only be achieved by r emoving the side cove r s.
VR1
Art # A-07081
Figu r e 11-3: VRD ON/OFF Step C and D
!
WARNING
The VRD ON/OFF t r im potentiomete r MUST ONLY be positioned fully clockwise OR fully counte r clockwise
as the VRD function will be unknown fo r eve r y othe r position.