Advanced Instruments Fluorophos FLM300 - Troubleshooting Table

Chapter 3 Troubleshooting
18
Fluorophos® ALP Test System Model FLM300 Service Manual
3.5 Troubleshooting Table
The troubleshooting table references the FL3000SC system schematic, and all voltages are approximate (±10%) unless
otherwise stated. A digital multimeter (DMM) or an oscilloscope is used to measure voltages, check for open or short
circuits, and measure resistance.
Table 2: Troubleshooting table
Symptom Possible cause Suggested action
1. No power, or
abrupt loss of power
(no display, fan,
incubator LEDs or
printer function)
Power connection to the
instrument
Make sure the power cord is firmly plugged into the power entry module on the
back of the instrument.
Power availablity Temporarily unplug the power cord from its wall outlet, and replace it with a known
working lamp or other appliance. If no power is present, have the power restored.
Power connection to grid Unplug the power cord from the power entry module on the back of the instrument.
Measure the AC voltage supplied at the end of the cord that will be connected to
the instrument.
Fuse check Unplug the power cord from the power entry module on the back of the instrument.
Use a small screwdriver to open the fuse holder. Visually check the two 5 x 20mm
fuses for a blown fuse. If there is any doubt, test the fuses with a continuity checker
or ohmmeter, or simply replace them. Also check the values marked on the fuses to
make sure they are the correct rating for the instrument. If a fuse was blown, and a
replacment fuse blows too, contact Hot-Line Technical Service for assistance (see
“Contacting Advanced Instruments”).
Power Supply Check for +12 VDC between power supply terminals +V (VIO) and -V (BLK). Replace
power supply if necessary.
Circuit board connections Check that all connectors on the PCB Set are properly connected and that there are
no damaged wires. Firmly insert all connectors. If wiring damage has occurred,
contact Advanced Instruments Product Service Department for assistance.
If cause is not identified See “Contacting Advanced Instruments” for contact information.
2. Display not on,
intermittent, or
displaying incorrect
characters
Display connections to
circuit board
Check cable connections at the PCB Set and at the display. Check for wiring
damage and for loose/displaced terminals in connectors.
Display power Check for +5 VDC on PCB Set test point, located between the +12 VDC and +5 VDC
indicator LEDs. Check for +5 VDC on display connector PP3 pin 4 (RED).
Faulty display Replace the display.
3. Keypad
malfuncton
Keypad connections to
circuit board
Check cable connections at the PCB Set and at the keypad. Check for wiring
damage and for loose/displaced terminals in connectors.
Worn or damaged keys Inspect keypad for worn or damaged keys. If damage is found or suspected, replace
the keypad.
4. Cuvette door open
error
Door switch connection to
circuit board
Check cable connection to the PCB Set or for wiring damage.
Door switch broken or
malfunctioning
Check that switch actuator is attached and functioning. Use continuity checker or
ohmmeter to verify switch circuit closes on actuation. If broken or not functioning,
replace LED harness.
Door switch not in proper
position
Check that switch is in proper position and will actuate when sample door closes.
Re-position switch if necessary.
5. Unexpected FLU
count in A/D Test or
measurements in
Calibration or Test
Optical bench component
problem
Perform Sample Illumination LED, Emission Filter, and Excitation Filter Tests
described earlier in this manual. Replace components as necessary.
Optical system has drifted Perform Black Body and C-Value Adjustments. Re-calibrate using A, B, and C
calibrators to ensure ratio of 150 ± 6. Re-calibrate product channels before using.
If cause is not identified Contact Advanced Instruments Product Service for assistance.