3
Copyright .....................................................................................................................................................2
Hot-Line
™
Service......................................................................................................................................2
Safe Use ....................................................................................................... 7
Symbol Conventions ................................................................................................................................7
General Cautions
.......................................................................................................................................8
Service and Maintenance Cautions
...................................................................................................8
Hazardous Material Cautions ...............................................................................................................9
FCC Requirements ...................................................................................................................................9
Supplies, Parts, and Accessories ..........................................................10
3250 Supplies, Parts, and Accessories ..........................................................................................10
3250 Controls and Calibration Standards ..................................................................................... 11
4250 Supplies, Parts, and Accessories .......................................................................................... 12
4250 Reference Solutions and Calibration Standards............................................................. 12
Chapter 1 Overview .................................................................................. 13
Product Description ............................................................................................................................... 13
The Service Manual ................................................................................................................................ 13
Service Assistance .................................................................................................................................. 13
3250/4250 Components...................................................................................................................... 14
Chapter 2 Calibration ..............................................................................16
Chapter 3 3250/4250 Circuit Description
.......................................... 17
Power Supply (Serial Suffix A - C) ...................................................................................................17
Power Supply (Serial Suffix D and Higher) .................................................................................. 18
Front End ................................................................................................................................................... 18
325605 Control Board Set Description ......................................................................................... 18
325620/425620/325621/425621 Processor Board .................................................................... 18
PCB605 Application Board ................................................................................................................ 19
Other Circuit Components .................................................................................................................. 21
Barcode Port Connections ..................................................................................................................22
Chapter 4 Cleaning and Maintenance ................................................24
Flushing the System ............................................................................................................................. 24
Draining the System ............................................................................................................................. 24
Removing the Head Cover and the Instrument Cover ........................................................... 25
Osmometer/Cryoscope Well Cleaning .......................................................................................... 26
Osmometer Well Cleaning ................................................................................................................. 26
Cryoscope Well Cleaning
....................................................................................................................27
Cleaning and Lubricating the Printer (Serial Suffix A - C, only)
........................................ 28
Probe and Stir/Freeze Wire Alignment
........................................................................................ 28
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