Repair
Repair Price: $ 1,728.00
Purchase
CSL Part Number: 73559
Product Overview: The Band Saw Motherboard with I/O Board (PN 81-EA511) is the main control system for Armstrong Blum Band Saw Stop series equipment, commonly found in Marvel 81A11PC band saws. This board manages operator input via keypad overlay, controls dual displays for operation and diagnostics, and processes sensor inputs including rotary encoder signals for automatic feed calibration. It features multiple programmable components including P80C32 microcontroller, GAL16V8 logic devices, and DS1232 watchdog supervisor IC running on a +5VDC supply from an integrated power section.
Category: Control Panel
Manufacturer: Armstrong Blum Mfg
Manufacturer Part Number: 81-EA511
Series: Band Saw Stop
There is no Factory repair on this item.
Common Failures
Units received for service commonly show issues with keypad and display functionality. Frequent symptoms include unresponsive buttons, dim or incorrect display output, and disrupted communication with associated components. Issues with microcontroller reset function have also been observed, which may prevent proper system boot-up.
Repair Approach
Repairs typically involve replacing defective components such as keypads, overlays, and related assemblies. In some cases, additional diagnostic testing and cleaning are required to confirm that replacement parts function correctly. For persistent display issues, it may be necessary to replace display drivers or associated circuitry before final assembly.
Testing & Quality Assurance
After repairs are completed, testing is conducted to verify component functionality. This includes checking button response and display operation. Quality checks confirm that buttons respond appropriately and that display output meets expected parameters. Additional diagnostics may be performed to verify microcontroller function and system voltage levels.
Service and repair your broken Armstrong Blum Mfg part
We can repair your Armstrong Blum Mfg model 81-EA511 in our facility. Let our skilled technicians get your Armstrong Blum Mfg back in operation quickly.
Step 1 - Click the green 'Repair Now' button above to add the part and then complete the RMA.
Step 2 - The RMA form will be sent to you via email. Print the RMA form and put it in a box with the item(s) for repair.
Step 3 - Ship or mail the box to the address listed on the RMA.
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