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CSL Part Number: 83556
Product Overview: The Cincinnati Inc. 842555 is a control board used in Cincinnati 90CBII series hydraulic press brakes. It manages press control functions including shut height positioning and hydraulic/electric valve operations. This PCB coordinates the synchronization between left and right side hydraulic systems to maintain consistent stroke accuracy and repeatability during bending operations. The board contains multiple integrated circuits and capacitors that generate timing pulses for positioning control.
Category: Control Board
Manufacturer: Cincinnati Inc.
Manufacturer Part Number: 842555
Also Known As(AKA): 842554 PCB
Common Failures
One reported issue involved an imbalance in operation; specifically, the left side of a press losing height unexpectedly while the right side maintained the correct position. Switching the hydraulic/electric inputs reversed the symptom, indicating a systemic imbalance rather than a single-point failure.
Repair Approach
In the reported case, capacitors were replaced as a preventive measure even though visual diagnostics did not indicate faults. System checks confirmed expected signals and oscillations following repair.
Testing & Quality
The unit underwent power-up tests and oscillation checks. It passed all Level 1 tests and was confirmed to have no discernible faults during bench testing. A burn-in test without load further validated functionality. However, due to the nature of bench-level testing, a full system simulation under operational load was not performed.
Limited Repair
The Cincinnati Inc. part number is only available as a limited repair at our facility. Repairs to this item may be limited due to several reasons:
- Availability of parts
- Less than 100% test ability due to required support equipment
To have us attempt a repair on your Cincinnati Inc. part follow these steps:
Step 1 -
Click the Repair Now button above to add the part and complete the RMA form.
Step 2 -
Print the RMA form that is sent to your email, and put it in the box with the parts for repair.
Step 3 -
Mail the box to the address on the RMA.
After we receive your item, we will perform an inspection and an authorization to repair will be sent for your approval. Work will begin after your authorization is received.
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