GSi TYMPSTAR 1, Service Manual

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Troubleshooting
Cavity or ear read
7.0 @ 226 Hz
21.0 @ 678 Hz
31.0 @ 1 kHz
The probe mic. or speaker tube is totally occluded. Clean the probe tip.
Pump problem symptoms and probable causes
Leak messages indicated when probe is in the hardwall cavity
1) Go to the diagnostic portion of Pressure Cal Mode. Pressurize the system and
pinch the tubing at various points to isolate the source of the leak.
2) Check the accuracy of the pressure calibration, overshoot, linearity, etc., in the
Pressure Cal Mode.
Overpressure safety switches vent pressures during normal operation
1) Perform Safety Valve calibration.
2) With the unit power OFF, measure for 0 Ohms on safety switch connectors that
are connected to Digital board. If a switch measures open, it is the cause of the
fault.
ALERT PRESSURE SYSTEM ERROR - POSSIBLE LEAK
Message occurs at power up or during any test attempt
Check pump photo eye for proper function.
Printer problem symptoms and probable
causes
Blank areas in the printout
1) Possible dirty print head. Run ordinary typewriter bond paper
through the printer. Its surface is abrasive enough to clean the head.
ALERT PRINTER ERROR, CHECK PAPER OR RELEASE LEVER
Message repeatedly occurs although paper and release lever are positioned
properly
1) A photo eye and a microswitch in the printer assembly detect these situations.
Check all connections from the digital board to the printer board for open or
intermittent connections.
2) Check cables between the digital board and printer board for intermittent con-
nections. Check the the printer to printer board ribbon cable for intermittent
connections.
GSI TympStar Version 1 and Version 2 Service Manual 8 - 23