An Early-Revision DS3800HMPK1B1B

The "1B1B" suffix places this unit among the earlier revisions of the DS3800HMPK that GE issued over the board's long production run — our own stock spans suffixes from 1B1B through 1N1K and beyond. That doesn't make it any less functional; it just means suffix matching is worth extra attention, since later revisions folded in circuit and component changes that don't necessarily flow backward. If your existing board is also stamped 1B1B, this is a direct match; if it's stamped differently, confirm compatibility with us before ordering rather than assuming interchangeability.

Ruling Out the Usual False Alarms First

A fault that looks like a bad DS3800HMPK is not always the board itself. Work through these first:

• Front LEDs. Three red LEDs and one amber LED sit on the board's front edge and give a first-look status check without removing the card.
• Ribbon cable routing. The board's two 50-pin connectors carry ribbon cables that run close to the onboard microprocessor; poorly routed cables can block cooling airflow and cause heat-related faults or shutdowns that look like a hard failure.
• Seating. The board mounts on a modular connector at one end with retention levers at the other — confirm full engagement before troubleshooting further.
• EPROM devices. Firmware and configuration data live on these, not the bare carrier board; a poorly seated device can present as a total board failure.

Suffix Letters and Why They Matter

"DS3800" is the Mark IV series prefix, "HMPK" is the function code for this Regulator Control Board, and "1B1B" is the revision/variant suffix. GE tracked hardware and firmware changes through these trailing codes across the board's production life. Suppliers generally treat later revisions as functionally compatible replacements for earlier ones, though the physical layout, components, or jumper configuration can differ enough that you'll want to check the documentation for your specific pair. Our GE Speedtronic Part Number Decoder explains the general structure of these part numbers.

The Rest of the Mark IV DS3800 Lineup

This Regulator Control Board shares the rack with other DS3800-series cards that make up a full Mark IV panel — drive interface boards like the DS3800HFPG, memory boards, and analog I/O cards. See the complete lineup in our GE Mark IV DS3800 Boards collection. If your plant has since moved to Mark V (DS200-series) or Mark VI/VIe (IS200-series), those are different hardware generations rather than a drop-in swap — our Mark V vs Mark VI: DS200 to IS200 guide covers how they relate.

Get a Quote in 24 Hours

Send us the full part number with suffix (DS3800HMPK1B1B), a photo of your existing board's label, your turbine model and confirmation it's a Mark IV system, quantity, and urgency. This unit is used, cleaned and tested, with a 1-year warranty. We ship worldwide DDP (Delivered Duty Paid) and accept purchase orders.