Section 9
Troubleshooting
9.1 Troubleshooting Table
Problem Cause Solution
Unit does not power up Power switch in off position.
1. Check power switch on back of unit.
No power from outlet.
Bad power cord.
2. Check power source.
3. Replace.
LCD display difficult to read
Back lighting burned out.
1. Call Bio-Rad service.
Contrast setting out of adjustment.
Printer jam Thermal paper caught between print head and thermal plate when tearing off paper.
1. Remove excess paper between printer head and plate using fine tip tweezers.
2. Power down unit, remove thermal paper roll and re-load paper in printer.
Printer paper would not Printer paper inserted self feed or advance incorrectly, leading edge of paper uneven or folded over.
1. Cut a straight clean leading edge on paper with a pair of scissors.
Paper feed button keyboard 2. Call Bio-Rad service.
is faulty.
Print out text too dark 1. Replace with new paper roll.
Printer paper damaged caused from excessive heat, moisture.
Paper loaded incorrectly.
Thermal print head/plate damaged.
2. Be sure the paper is installed in the proper orientation.
3. Replace printer. Call Bio-Rad service.
Keyboard buttons not responding
Incomplete system initialization during power up.
1. Power down unit/Restart unit.
Pressed wrong button for operation.
RS232 serial port/no response
Cuvette does not fit in cuvette chamber
Incomplete system initialization during power up.
PC setup incorrect/wrong instruct mode.
1. Power down unit/Restart unit.
2. Check spreadsheet program setup.
Cable's not fully connected/ 3. Check all connections.
wrong adaptor.
Cuvette wrong size.
Cuvette spring in wrong location.
Cuvette spring missing.
1. Chamber accommodates cuvettes up to 12.5 mm width.
2. Re-insert spring to correct location.
3. Obtain new cuvette spring.
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