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2-26
Line voltage conversion is accomplished by adjusting
three components; the two-section line select switch A1S2, line-
voltage jumper A1W5, and rear-panel line fuse FI. To convert
the supply from one line voltage option to another, proceed
as follows:
WARNING
Some components and circuits are at ac line
voltage even with the switch off. To avoid elec¬
tric shock hazard, disconnect line cord and load
before removing cover.
a. Remove top cover from instrument by removing two
screws that secure cover to rear panel; remove only rear
screw on carrying handle; slide cover to rear and lift off.
b. The line voltage select switch is located in the front left
corner of the instrument (see Figure 2-3). Use a small-
blade screwdriver to set the two switch sections to match
the pattern silkscreened on p.c. main board as shown
in Figure 2-3. For example, to set switches for 120 V
operation (as illustrated), move forward switch section
so that its white slot is toward front of instrument and
move rearward switch section so its white slot is toward
rear of instrument.
c. One end of A1W5 is soldered to motherboard; the other
end has a female right-angle quick-connect terminal that
fits onto one of two terminals soldered to motherboard.
For 100 V or 120 V operation, A1W5 must be connected
to terminal closer to center of instrument; for 220 V or
240 V operation, A1W5 must be connected to terminal
closer to side of instrument. Be certain that jumper is firm¬
ly mated with terminal on motherboard. Do not grip
jumper insulation with pliers; either grip jumper wire by
hand or grip jumper terminal with pliers.
d. Check rating of fuse FI installed in rear-panel fuseholder
and replace with correct value if necessary. Do not use
slow-blow fuses. For 120 V operation, use 8 A fuse, HP
Part Number 2110-0383. For 220 V or 240 V operation,
use 4A fuse, HP Part Number 2110-(X)55.
e. Replace covers and mark the supply clearly with a tag
or label indicating correct line voltage and fuse to be used.
2-27
REPACKAGING FOR SHIPMENT
2-28
To insure safe shipment of the instrument, it is recom¬
mended that the package designed for the instrument be
used. The original packaging material is reusable. If it is not
available, contact your local Hewlett-Packard Sales and Ser¬
vice office to obtain the materials. This office will also furnish
the address of the nearest service office to which the Instru¬
ment can be shipped. Be sure to attach a tag to the instrument
specifying the owner, model number, full serial number, and
service required or a brief description of the trouble.
2-3
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