12084-102 Rev B Page 8
4.1 HIGH LINE VOLTAGES (120-130 OR 240-260
VOLTS)
If the local line voltage is at least 10 volts
greater than the nominal voltages mentioned
in Section 3 (115 volts or 230 volts), refer to
Figure 1 and locate the PC board trace on the
back side of the PC board labeled “Cut for
120-130 or 240-260 Volt Operation.” The trace
can be cut with a small utility knife. This
process inserts an additional resistor in series
with the lamp, lowering its intensity. Make
sure to completely cut the trace between the
two half circles.
4.2 LOW LINE VOLTAGES (100-110 OR 200-220
VOLTS)
Adjusting the POC for low line voltages is a
little more difficult. Refer to Figure 1 and
locate the two holes marked “Short for
100-110 or 200-220 Volt Operation” on the PC
board. A small piece of wire must be soldered
between these two holes.
The wire should be at least 24 AWG. It can
be soldered thru the holes in the PC board or
“tack soldered” on the bottom of the board.
Use a low to moderate wattage “pencil” type
soldering iron and solder intended for
electrical use only.
This process shorts the second resistor in
series with the lamp and delivers the full
voltage of the transformer to the lamp.
Check that all the work is clean and secure
and replace the rear cover.
Figure 1
3.
SETTlNG LINE VOLTAGE SELECTOR
The line voltage can be set for either 115 volt
nominal operation or 230 volt nominal
operation. The unit is shipped in the 115 volt
position.
To select 230 volt operation remove the rear
cover and slide the selector switch (71) to the
230 volt position. Replace the fuse (74) with
a .25A/250V fuse. The fuse holder will accept
either 3AG type fuses or 5 x 2mm fuses.
Make sure that a plug which meets applicable
standards and codes for your area is attached
to the cord, or replace the cord with an
appropriate one.
4.
ADJUSTING LAMP INTENSITY FOR
DIFFERENT LINE VOLTAGES
The POC can be set to maintain optimum
lamp intensity and life with different line
voltages using two resistors (70) on the PC
board. These resistors adjust the lamp
voltage up or down by approximately 5%. The
unit is shipped from the factory with one
resistor bypassed and one in circuit. The life
of the lamp decreases rapidly with higher than
nominal input voltages, and its intensity may
be lower than desired with lower input
voltages. It is therefore advantageous to
optimize the lamp intensity for different line
voltages.
