Two Part Numbers, One Mark IV Card

This board's title carries two identifiers you'll see used for the same Mark IV slot: DS3800HFPG1D1B and DS3815PDPA1F1A. In General Electric's Speedtronic Mark IV documentation and in most supplier catalogs, HFPG is the function code used for the Drive Control Board, built around a microprocessor and a set of EPROM modules that hold the firmware for the specific drive function this card performs; the firmware is factory-supplied and application-specific, which is why the modules matter as much as the carrier board itself. Because more than one part-number convention circulates for cards that pass through this position, don't rely on the printed prefix alone — send us a clear photo of the label before you order, and we'll confirm exactly what your panel needs.

Physically, the board is built as a double-width card, seating in a dedicated two-slot position in the rack via modular connectors at the rear and retention levers to hold it in place. On the front it carries a 34-pin connector and test points, plus a 40-pin connector on the board surface for a ribbon-cable link to adjacent cards.

Rule Out These Before Ordering a Replacement

A drive fault doesn't always mean this exact card is bad. Work through these first:

• Mislabeled expectations. Because this position carries more than one part-number convention, confirm what's actually printed on your board's label before assuming a straight swap — a photo settles it in minutes.
• Ribbon cable airflow. A cable from the 40-pin connector routed across the microprocessor can trap heat and cause the board to fault under load, then test fine once cooled — a classic false alarm that looks like a dying processor.
• Partial seating. A double-width card resting on only one of its two rear modular connectors can behave erratically. Reseat fully on both sides first.
• EPROM modules. These are normally moved from your old board to the replacement, which ships with empty sockets — a poorly seated module can look like a full board failure even when the carrier is fine.

What the Trailing Suffix Means

In DS3800HFPG1D1B, "1D1B" is the revision/variant code that follows the DS3800 series prefix and HFPG function code. GE issued this Drive Control Board across a number of such suffixes over its production run — our own stock spans 1B1B, 1D1B, 1D1C, 1D1D, and 1D1G — and later revisions are not automatically interchangeable with earlier ones. Match the suffix on your existing label wherever you can, and see our GE Speedtronic Part Number Decoder for how GE structured these codes more generally.

Where It Fits Among Other DS3800 Boards

A Mark IV panel runs on a mix of DS3800-series cards — processing, memory, analog I/O, and communication boards working together, including the DS3800HMPK regulator/microprocessor board. See the rest of the lineup in our GE Mark IV DS3800 Boards collection. Note that Mark V (DS200-series) and Mark VI/VIe (IS200-series) panels use entirely different hardware generations; our Mark V vs Mark VI: DS200 to IS200 guide covers how the generations relate if your site has since upgraded.

Let's Confirm Fit First

Given the dual labeling on this card, a quote request should include the full part number(s) exactly as printed on your existing board (DS3800HFPG1D1B and/or DS3815PDPA1F1A), a photo of the label, your turbine model and confirmation of Mark IV, quantity, and your urgency. This unit is used, cleaned and tested, with a 1-year warranty. We ship worldwide DDP (Delivered Duty Paid), accept purchase orders, and respond within 24 hours — submit a Request a Quote and we'll verify fit before shipment.