Advanced Instruments OsmoTECH XT - Fuse Replacement

Chapter 8 Maintenance and troubleshooting
74
OsmoTECH XT Single-Sample Micro-Osmometer User Guide
7. Inspect the solenoid plunger for excessive wear and
deposits.
• If the plunger shows signs of fouling, clean it with a
lint-free cloth dampened with isopropyl alcohol or
a cleaning solution for protein removal. (Thermo
Scientific Orion Cleaning Solution, part number
900021 is recommended.)
• If the plunger does not show signs of wear,
continue to step8.
Black
deposits
on shaft
Filings
present
Plating is
uneven, with a
dull, hammered
appearance
No black
deposits
on shaft
No filings
present
Plating is
even, bright,
and shiny
8. Return the cleaned solenoid plunger, including spring,
retainer and any washers, to the solenoid body. Screw
in the retainer bracket screws. Replace the instrument
cover, and remove the chamber cleaner.
9. If necessary, recalibrate the OsmoTECH XT.
Fuse replacement
Tools required:
• Small flat screwdriver
• Static Grounding Wrist Strap
WARNING: Hazardous Voltage
WARNING: Internal components may be
damaged by static electricity.
CAUTION: Improper connections may cause
damage to the instrument.
CAUTION: A discharge of static electricity from
contact with the human body or other
conductor may damage system boards or static
sensitive devices. NEVER UNPACK, TOUCH OR
HANDLE ANY PCB WITHOUT WEARING A
GROUNDING (EARTHING) STRAP TO MINIMIZE
YOUR STATIC DISCHARGE.
1. Power o the OsmoTECH XT.
2. Unplug the instrument and remove the power cord
from the instrument.
3. Use a small flat screwdriver to open the Fuse Holder
Door located on the Power Entry Module.
Screwdriver
Fuse Holder
Fuse Holder
Door (open)
4. Remove the Fuse Holder; then remove the two fuses.