Diamond Diagnostics Prolyte - Probe Motor Verification

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PROLYTE ANALYZER

2.e Probe Motor Verification

1. Disconnect the power cord, wait ten seconds, then reinstall the power. The probe

arm should move down and back up. If there are no error messages, resume normal

operation. If a “PRB” error occurs, proceed to STEP 2.

2. Remove the sample probe from the probe arm. For details refer to proLYTE

Operator’s Manual. Remove and reinstall the power cord. The probe arm should move

down and back up. If there are no error messages examine and if necessary replace

the sample probe, solutions valve and/or probe wiper. If a “PRB” error occurs,

proceed to STEP 3.

3. If the probe arm does not move at all perform the following operations.

A. Visually inspect that the actuator and retaining ring are correctly installed on the

probe motor lead screw. If the installation is incorrect, refer to CPU Board

Removal and Probe Motor Installation in the REPAIR SECTION for details.

B. Check that the probe motor wires are completely seated inside the 4-pin

connector as follows:

- Remove the probe motor connector from the bottom left of

the CPU Board (position P3).

- Compress the strain-relief cap against the probe motor

connector to firmly seat the wires.

- Reinstall the probe motor connector into the CPU Board.

C. Repeat STEP 1. If no errors occur, resume normal operation.

4. If the probe arm moves and stops anywhere except the top position, or if the probe

arm vibrates against the top of the proLYTE housing, replace the probe position

sensor. To replace the sensor, first remove the CPU Board and the probe position

locator. Refer to Probe Motor Assembly Removal in the REPAIR SECTION for details.

5. If the probe does not move at all, check for a short circuit on the CPU Board

between TP12 and TP2. If there is a short circuit, replace the Stepper driver daughter

board at positions U35 and U36. See Front and Rear Assembly Components in the Product

Description Section.

6. If no short circuit is found, replace the probe motor assembly. Refer to the Probe

Motor Assembly in the REPAIR SECTION for details.