DS3815PDPA1U1B and DS3800HFPG1D1D: Reading This Label

Some Mark IV Drive Control Boards changed part-number conventions during their production life, and this is one of them: supplier documentation cross-references DS3815PDPA1U1B directly against DS3800HFPG1D1D, treating them as the same board for the same rack position. HFPG is General Electric's function code for the Drive Control Board in the Speedtronic Mark IV system — a card built around a microprocessor and EPROM modules holding the firmware for the specific drive function it runs, with a transistor-to-transistor logic (TTL) device handling interface logic between the board's integrated circuits. Because GE also used the DS3815PDPA designation on other, physically different Mark IV boards, we still recommend a quick label photo before you order, just to be certain your rack position matches.

The card is a double-width unit, occupying two slots in the rack and connecting through modular connectors at the rear, secured with retention levers. On the front it has a 34-pin connector and test points; a 40-pin connector on the board surface carries a ribbon cable to adjacent hardware.

Before You Buy: What Else Could Be Wrong

• Ribbon cable blocking airflow. If the cable from the 40-pin connector runs across the microprocessor, it can trap heat and cause intermittent, load-dependent faults that look exactly like a failing processor but are really a cooling problem.
• One connector seated, not both. This is a double-width card with two rear modular connectors; if only one is fully engaged, expect erratic behavior that mimics a bad board.
• EPROM module seating. The firmware lives on removable EPROM modules, normally moved over from your old board since replacements ship with empty sockets. A module that isn't fully seated can present as a dead board.
• Front test points. Use them to isolate the fault to a specific circuit before deciding the whole card needs replacing.

What "1D1D" Adds to the Part Number

After the DS3800 series prefix and the HFPG function code, "1D1D" is the revision/variant suffix GE assigned to this specific hardware/firmware combination. Multiple suffixes of this board exist — in our own stock alone: 1B1B, 1D1B, 1D1C, 1D1D, and 1D1G — and none should be assumed interchangeable without checking. Match the suffix on your existing label, and see our GE Speedtronic Part Number Decoder for how GE generally structured these codes.

Companion Boards in the Same Rack

The Drive Control Board is one piece of a larger DS3800 lineup that fills out a Mark IV panel — processor boards such as the DS3800HMPK, memory boards, and analog I/O cards among them. See the rest of the family in our GE Mark IV DS3800 Boards collection. Panels since upgraded to Mark V (DS200-series) or Mark VI/VIe (IS200-series) are running different hardware altogether; our Mark V vs Mark VI: DS200 to IS200 guide walks through how the generations connect.

Confirming Fit and Getting a Quote

To confirm fit and get a quote within 24 hours, send us the part number(s) as printed on your board's label (DS3815PDPA1U1B and/or DS3800HFPG1D1D), a photo of that label, your turbine model and confirmation of Mark IV, 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.