Reference: Use this instruction with replace-
ment part 3D2404R.
Tools Needed: Phillips screwdriver; flat-
bladed screwdriver; Allen
wrench; soldering iron and
rosin-core solder; probe align-
ment tool and instructions
(included).
CAUTION: Improper connections may
cause damage to the instrument.
Instruction:
1. Place an empty sample tube in the freez-
ing chamber.
2. Turn off the power and unplug the instru-
ment.
3. Remove the two screws from the head
cover (A) and lift off the head cover.
4. Remove the two screws (B) that attach
the clapper to the yoke and lift the clapper
to remove it.
5. Identify the coil leads where they connect
to the terminal strip at TR1 and TR2 (C),
and snip off the leads as close to the ter-
minal strip as possible.
6. Remove the Allen screw (D) that attaches
the yoke (E) and coil to the assembly.
7. Remove the old coil and replace it with
the new one, and then replace the Allen
screw.
Stir/Freeze Coil Replacement
3D2404R
For additional information or technical assistance,
please contact Advanced Instruments Hot-Line
®
Service Center (U.S. 1-800-225-4034, outside
North America +US 1-781-320-9000).
325P404 Rev1
(3255 Service Manual)
Page 1 of 2
A
D
B
E
C
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