REC 3838 4-1
CHAPTER 4.0
MAINTENANCE
4.1 GENERAL
Your electronics system is capable of efficient and reliable operation when it is properly
maintained. Cleanliness is the most important factor in keeping your electronics in good
operating condition.
To assist you in servicing your electronics system, information in this section includes:
Factory service and repair information.
Removal, replacement, and adjustment procedures to assist you in solving repair
problems.
Troubleshooting procedures.
4.2 SERVICE & REPAIR
The maintenance information in this manual is adequate to meet your service needs.
However, if you run into problems requiring technical assistance, please call (800)227-
8891 toll free or (612)783-2700. In addition, Thermo Products Field Service
Representatives are fully trained and available from regional offices.
Before performing any drastic modifications to this machine, refer to your warranty or
contact your Thermo Products Field Service Representative.
Thermo Products has a repair center located at our plant in Minneapolis, Minnesota.
Please contact our Repair Parts Representative at (612)783-2783 for assistance.
Please have available your machine model and serial number as this will expedite your
service request.
When returning parts for repair, please use the Return Material Authorization form located
in the parts section of this manual.
4.3 COMPONENT REPLACEMENT PROCEDURES (ELECTRICAL)
CAUTION
AVOID HIGH VOLTAGE AND STATIC ELECTRICITY AROUND CIRCUIT
BOARDS.
4.3.1 Display Board Assembly Replacement
To replace the Display Board, proceed as indicated below.
1. Turn off power at mains.
2. Open the electronics controller enclosure door.
3. Disconnect Display Board ribbon cable at J5. (See Figure 4-1.)
4. Remove mounting hardware securing Display Board to door of enclosure.
5. Carefully lay Display Board down to gain access to front panel cable.
6. Disconnect front panel cable at Display Board connector J7.
7. Remove Display Board from enclosure.
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