Maintenance and Troubleshooting 31
Hardware Diagnostics
4
Overview
Table 3 on page 31 shows a complete list of hardware diagnostic tests that can
be run with the electrode cartridge.
Table 3 Diagnostic tests for electrophoresis mode
Test Des c ript ion
Electronic test Verifies proper functioning of all electronic boards.
Fan test Checks that the fan is running.
Lid sensor test Checks for the devices sensing open or closed lid, and for laser and LED off when
lid is closed.
Temperature test Checks that the temperature ramp up speed of the heater plate is within
specifications.
Stepper motor test Checks for proper movement of the stepper motor.
Electrode/Diode test Checks photodiode and current versus voltage performance of the 2100
Bioanalyzer instrument. Electrode/Diode test chip required.
High voltage stability test Checks the accuracy and stability of all 16 high voltage power supplies. Unused
chip (DNA, RNA or protein) required.
High voltage accuracy test Checks high voltage controller. Unused chip (DNA, RNA or protein) required.
High voltage accuracy-on load test
(only for G2939A, G2938B and C
instruments)
Checks channel-reference diode in transmission direction. Unused chip (DNA,
RNA or protein) required.
Short circuit test
Checks for instrument leak
currents using an empty chip. Note: the limits of this
test specify an ambient temperature of 25°C and relative humidity less than or
equal to 50%. Higher temperatures of relative humidity could result in a leak
current. Unused chip (DNA, RNA or protein) required.
Optics test Checks for proper alignment of internal optics and proper function of the laser.
Electrode/Diode test chip required.
Autofocus test Checks focusing capability of optical system. Autofocus test chip required. Input
values are located on top of the chip.
Laser stability test Measures red laser signal stability. Autofocus test chip required.
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