Ferroelectric properties of the MLC films: remnant values

Figure 6-11 Test points and calibration potentiometer

6.3.5 Adjustment and Testing

After replacing the drive board or the rinse photocoupler assembly, the rinse photocoupler calibration potentiometer must be readjusted per the following procedure:

1 Log in with service access level or above, select "Setup""Service Setup""Photocoupler Calibration" to enter the screen; confirm whether the threshold needs to be modified.

2 Click "Start", the dialog box "Remove the Rinse tube from the container and press [OK] to continue." will pop up, do accordingly and then click "OK".

3 A progress bar will be displayed; after the progress ends, a dialog box will pop up.

4 Do as instructed by the dialog box.

1) Adjust rinse photocoupler calibration potentiometer VR1 (see Figure 6-11) manually until the rinse sensor calibration indicator D22 (see Figure 6-10) turns on.

2) Put the rinse tube back to the container (make sure there is rinse in the rinse container), click "OK" to close the dialog box.

3) Then click "Finish".

5 The rinse priming progress bar will be displayed; after the progress ends, the new background voltage, measured voltage and calibration status will be displayed; if the result is Fail, you need to re-perform calibration from step 1.If the result is Pass, that means the calibration succeeded.

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6.3.6 Troubleshooting

1) Checks before troubleshooting

Before troubleshooting the drive board, you should first check if the wires are firmly connected, if they are connected to the sockets of the same No., and if the wires are damaged.

When you suspect that drive board failure occurs, check if the indicators are under normal status per the following table.

Table 6-6 Status of drive board indicators

Indicator No. Normal Abnormal Description

5V

indicator D8 On Off

If the indicator is off, that means the 5V power supply is abnormal. Cut off the power of the analyzer, test the resistance of the 5V fuse (see Figure 6-11) with the multimeter, if the result is over 1 ohm, that indicates the 5V

fuse is damaged and the drive board needs to be replaced; if not, check if the 5V output voltage of the power board is within the range

[4.75V，5.25V].

3.3V

indicator D11 On Off

If the indicator is off ,that means the 3.3V power supply is abnormal, which can be caused by the abnormal 5V power supply or

damaged drive board (you can determine which the case is by observing the 5V indicator or testing the voltage between VCC

and GND).

12V

indicator D10 On Off

If the indicator is off, that means the 12V power supply is abnormal, which will result in

the breakdown of all valves and pumps. Cut off the power of the analyzer, test the resistance of the 12V fuse (see Figure 6-1)

with the multimeter, if the result is over 1 ohm, that indicates the 12V fuse is damaged

and the drive board needs to be replaced; if not, check if the 12V output voltage of the

power board is within the range [11.4V，

12.6V].

24V

indicator D9 On Off If the indicator is off, that means the 24V power supply is abnormal, which will result in

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the breakdown of all motors. Cut off the power of the analyzer, test the resistance of

the 24V fuse (see Figure 6-11) with the multimeter, if the result is over 1 ohm, that indicates the 24V fuse is damaged and the drive board needs to be replaced; if not, check if the 24V output voltage of the power

board is within the range [22V，30V].

MCU

indicator D49 Flickers every 1s

Does not flicker

If the indicator does not flicker, that means the MCU is not working normally. First check

if the 3.3V power is under normal status (voltage range [3.15V,3.45V]) by observing

the 3.3V power indicator or testing the voltage between VDD and GND, if error of the 3.3V power supply is found, replace the drive board or upgrade the MCU program of the drive board per the upgrade instruction. If

the indicator still does not flicker after the upgrade, the drive board must be replaced.

FPGA

indicator D51 Flickers every 1s

Does not flicker

If the indicator does not flicker, that means the FPGA is not working normally. First check

if the 3.3V power supply is normal (voltage range [3.15V,3.45V]) by observing the 3.3V indicator or testing the voltage between VDD

and GND. And check if the 1.5V power supply is normal (voltage range [1.45V，

1.55V]) by testing the voltage between 1V5 and GND. If error of the power supplies is found, replace the drive board or upgrade the

FPGA program of the drive board per the upgrade instruction. If the indicator still does not flicker after the upgrade, the drive board

must be replaced.

If all the indicators are confirmed to be ok, check if the MCU and FPGA versions are correct on the software screen (Click the menu option"Service" "Version Info."); if yes, troubleshoot the error as instructed in the following section.

2) Troubleshooting

You can roughly locate the error by the alarm, then accurately locate the error by its type and dispose it, see Table 6-7.

Table 6-7 Troubleshooting methods No. Type Description Troubleshooting Methods

Hardware System

1 Check if the power supply of the board is normal;

2 Check if the wires of motors and photocouplers of all channels are firmly connected, if they are connected to the sockets of the same No., and if the wires are damaged.

3 After completing step 1 and 2, click "Clear Error"

or perform self-test on the software screen to see if the error can be cleared.

4 Check if the luminous surface of the photocoupler is covered by dust or fluid spills, if so clean and reinstall the photocoupler to see if the error can be cleared. If the error persists, replace the photocoupler.

5 If the error cannot be cleared by replacing the photocoupler, replace the drive board.

6 If the error persists, replace the motor of the corresponding channel.

7 If the above step fails to clear the error, it may be caused by the failure of mechanical components (e.g. the friction force is too great), you should handle it as a mechanical error.

1 Motors and photocouplers

Abnormal sounding of

motors

1 Check if wires of the motors are firmly connected and if they are damaged, if so, replug or replace the wires when power is off.

2 Check if the fixing screws of the mechanical assembly are loose, if so, tighten the screws.

3 If the above problems are excluded, the error may be caused by drive board failure, replace the drive board.

4 If step 3 fails to clear the error, replace the motor assembly.

2 Valves

Breakdown of valves is suspected

1 First check if the valve can be open and closed normally (you can hear a clatter) at the self-test screen; if yes, that means the valve drive is ok, you should consider the error as a fluidic error.

2 If the valves cannot be open and closed normally, check if its wire is firmly connected or damaged. If

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yes, replug or replace the wire.

3 If step 2 cannot clear the error, connect the wire of another valve to the valve, then check if the error lies in the valve drive circuit or the valve itself at the self-test screen (if failure of valve 2 is suspected, connect the wire of valve 3 to valve 2, then open and close valve 3 at the self-test screen, if it can be open and closed normally, that means the drive considered as a gas path error.

2 If the valves cannot work normally, check if its wire is firmly connected or damaged. If yes, replug or replace the wire.

3 If the error cannot be cleared by step 2, replace the drive board.

4 If the error persists, replace the pump.

4 Communication Communication error is reported

1 Check if the indicators of the data board and drive board are under normal status, if not, replace the boards.

2 Check if the wire between the data board and drive board is firmly connected, if not, replug the wire.

3 If the error cannot be cleared, replace the wire.

4 If the error persists, replace the drive board and data board in turn.

5 Rinse

2 Disassemble the rinse photocoupler assembly, check if the photocoupler is cover by fluid spills or dust, if yes, clean the photocoupler.

3 If the error cannot be cleared, replace the rinse

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photocoupler assembly.

4 If the error persists, it may be caused by aging of the rinse tube.

6 Waste sensor Incorrect alarm of waste status

1 Check if the waste wire is loose or damaged, if yes, pull off and clean the wire and then replug it, or replace the waste wire.

2 If no, replace the waste cap assembly.

7 Micro-switch sample compartment connection board are loose or damaged, if yes, replug or replace the wires.

2 if the error cannot be cleared, disassemble the

In the BC-3600 Auto Hematology Analyzer, the power board provides 6 groups of stable power output, including D5V, A+12V, A-12V, AC120V, P12V, P24V.

Section 6.4 is the servicing and troubleshooting guideline of the power board.

6.4.2 Structure

Function

The functional diagram of the power system is as follows: