3
The Advanced
®
Model 3250/4250 Service Manual
1. Introduction
Specifications . . . . . . . . . . . . . . . . . . . . .7
General Description and Purpose . . . . 11
Service Assistance . . . . . . . . . . . . . . . . 11
Safety/Regulatory Information . . . . . . 12
Symbol Conventions . . . . . . . . . . . . . . 12
General Cautions . . . . . . . . . . . . . . . . . 12
Service & Maintenance Cautions . . . . 13
Hazardous Material Cautions . . . . . . . 14
Regulatory Notices . . . . . . . . . . . . . . . 14
Symbol Conventions . . . . . . . . . . . . . . 14
FCC Requirements . . . . . . . . . . . . . . . 15
2. General Overview
General Overview . . . . . . . . . . . . . . . . 21
Calibration . . . . . . . . . . . . . . . . . . . . . . 23
Circuit Description . . . . . . . . . . . . . . . 24
Power Supply . . . . . . . . . . . . . . . . . . . .24
Front End . . . . . . . . . . . . . . . . . . . . . . . 24
325605 Control Board Set . . . . . . . . . .24
325620/425620/325621/425621
Processor Board . . . . . . . . . . . . . . . . 25
PCB605 Application Board . . . . . . . . . 26
Other Circuit Components . . . . . . . . . .27
Design Changes . . . . . . . . . . . . . . . . . . 29
Replacement Parts . . . . . . . . . . . . . . . . 30
Supplies & Accessories . . . . . . . . . . . . 32
3. Maintenance
Cleaning and Maintenance . . . . . . . . . 35
Removing the Head & Instrument
Covers . . . . . . . . . . . . . . . . . . . . . . . 36
Osmometer/Cryoscope Well Cleaning 37
Cleaning and Lubricating the Printer . 39
Probe & Stir/Freeze Wire Alignment . 40
4. Troubleshooting
Introduction . . . . . . . . . . . . . . . . . . . . . 43
Freeze “Buzz” Amplitude . . . . . . . . . . 44
Stir Driver Noise . . . . . . . . . . . . . . . . . 45
Head Sensor Adjustment . . . . . . . . . . . 47
Head Up/Down Test . . . . . . . . . . . . . . 48
Power On Diagnostics . . . . . . . . . . . . . 49
A/D Tests . . . . . . . . . . . . . . . . . . . . . . . 49
Sample Bin Setting . . . . . . . . . . . . . . . 50
Block Bin Setting . . . . . . . . . . . . . . . . 51
Stir Amplitude . . . . . . . . . . . . . . . . . . 51
Display/Printer Test . . . . . . . . . . . . . . . 51
Beeper Test . . . . . . . . . . . . . . . . . . . . . 52
Keypad Test . . . . . . . . . . . . . . . . . . . . . 52
Barcode Test . . . . . . . . . . . . . . . . . . . . 52
Reset Serial Number . . . . . . . . . . . . . . 52
Instrument Software Updates . . . . . . . 54
Performing FLASH firmware update . 54
Troubleshooting Table . . . . . . . . . . . . . 56
5. Replacement Instructions
Block Probe (4D3340) . . . . . . . 325P340
Clapper (3C2241R) . . . . . . . . 3C2P241R
Control Board Set (325605R/425605R),
Application Board (PCB605R),
Processor Board (325621R/
425621R) . . . . . . . . . . . . . . 325P620
Cooling Assembly (3D3300R/
4D3300R) . . . . . . . . . . . . 325P300
Cooling Fan (4D3360) . . . . . . . 325P360
Display Board (74051R/
702041R) . . . . . . . . . . . . 325P051
Driver Board (PCB523R) . . .PCB523PM
Fuse (70011/70022) . . . . . . . . . . .325P11
Head Up Relay or Head Down
Relay (3D3109) . . . . . . . . . . 325P109
Heat Transfer Fluid Pump
Assembly (4D3690), Fluid
Filter (4D3710R), One-way Check
Valve (4D3705R/99133R) . . . .4DP690
Keypad (325511R) . . . . . . . . . . 325P511
Load Resistor (425150R) . . . . . 42P150R
Mandrel (3LH500) . . . . . . . . . . 3LHP500
Motor Assembly (4D3350R/
325304R) . . . . . . . . . . . . . . 325P350
NVRAM Battery (71027R) . . . . 71P27R
Power Supply Assembly (4D3950/
325950R) . . . . . . . . . . . . . . 325P950
Printer Assembly (325400R) . . .325P401
Printer Assembly (325420R) . 325420PM
Printer Mechanism
(325404R) . . . . . . . . . . . . . .325404PM
Probe Alignment Tool Kit
(3LA700) . . . . . . . . . . . . . . . . . 3LP700
Sample Probe (3D3700) . . . . . . . 3DP700
Sample Probe (3D3700) . . . . . . 325P700
Sample Probe (4D3102) . . . . . . . 4D3P02
Cryoscope Sample Probe
Versions FAQ . . . . . . . . . . . . . 4DP002
Stir/Freeze Coil (3D2404R) . . . 325P404
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