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Key Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | GE (General Electric) |
| Part Number | DS3800NFCF1E1C |
| Product Family | DS3800 Series |
| System Platform | Speedtronic Mark IV |
| Module Type | Firing Circuit Board |
| Application | Gas/steam turbine firing control |
| Number of Circuits | 42 integrated circuits |
| RAM Type | 8-bit static MOS RAM |
| RAM Access Time | 400 ns |
| Counter Type | 4-bit up/down counter |
| Flip-Flop Type | Dual J-K negative-edge-triggered |
| Power Supply | +5 V DC |
| Transistors | 21 |
| LEDs | 15 total (14 red, 1 amber) |
| Jumpers | 2 adjustable jumpers |
| Weight | 1.25 lb (0.57 kg) |
| Operating Temperature | -30 to +65 °C (typical for DS3800 cards) |
| Compatibility | Mark IV rack only; verify exact revision |
| Condition Options | New Unopened or Rebuilt |
| Availability | Discontinued by manufacturer; limited stock |
| Warranty | 1–2 years (varies by supplier) |
Product Introduction
GE DS3800NFCF1E1C is a firing circuit board from the DS3800 Mark IV series, used in GE Speedtronic gas and steam turbine control systems. It features 42 integrated circuits and provides precise control over turbine firing sequences.
This board is designed for high precision and stability in industrial environments, with dual J-K negative-edge-triggered flip-flops for maximum isolation from external disturbances. The part has been discontinued by GE and is available only as new surplus or rebuilt units from third-party suppliers.
Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| Turbine firing failure or misfire | Firing circuit board fault | ✅ High | Review Mark IV diagnostic logs for firing-related alarms | If diagnostics point to this card, replace and verify configuration |
| No board status LEDs | No rack power, blown fuse, or bad backplane | ❌ Low | Measure rack supply voltage at the backplane and check adjacent modules | Check power and rack hardware before replacing this board |
| 14 red LEDs lit or amber LED flashing | Firing circuit fault or error condition | ✅ High | Count LED indicators and check their status patterns | Cross-reference LED patterns with Mark IV diagnostic manual |
| Intermittent firing faults | Loose edge connector, oxidation, or rack vibration | ✅ High | Inspect connector seating and check for bent pins | Reseat the module and clean the connector if needed |
| Module not recognized | Revision mismatch or incompatible system configuration | ✅ High | Compare part number, suffix, and host rack documentation | Confirm exact system compatibility before installation |
| Burn marks or overheating | Electrical damage or overload | ✅ High | Inspect PCB, connectors, and nearby components for discoloration | Replace the board and verify supply conditions before re-energizing |
If you are stuck, contact technical support with photos, rack model data, LED status patterns, and any fault logs from the Speedtronic system.
- DS3800NFCF1E1C
- DS3800NFCF1E1C
Frequently Asked Questions
Q: Is DS3800NFCF1E1C still available as new from GE?
A: No, this part has been discontinued by GE. It is sold as New Unopened (New Surplus) or Rebuilt (Refurbished, tested) from third-party suppliers.
Q: What’s the difference between DS3800NFCF1E1C, 1D1C, and 1E1B?
A: The suffix indicates revision. DS3800NFCF1D1C is also a firing circuit board but with a different revision. DS3800NFCG1E1B is a related firing circuit board variant. Always match the exact suffix before ordering.
Q: Can I hot-swap this firing circuit board?
A: Do not hot-swap. Power down the Mark IV rack unless OEM documentation explicitly says otherwise. Swapping live can damage the backplane or the board.
Q: Will my existing configuration stay intact after replacement?
A: Speedtronic configuration usually lives in the controller or host system, not this board. Still, document the old board’s position, jumpers, and connectors before removal.
Q: Why is this cheaper than factory new stock?
A: Because it is obsolete surplus or rebuilt inventory. That lowers price, but verify test status and warranty terms. Rebuilt units should come with a test report.
Q: What condition options are available?
A: New Unopened (New Surplus) or Rebuilt (Refurbished, tested). Rebuilt units should be explicitly labeled and tested with verification.
Q: What should I check before ordering?
A: Confirm the full model number including suffix, Mark IV rack compatibility, connector style, and required revision. For legacy GE turbine control parts, that prevents most installation mistakes. Verify the LED count (14 red, 1 amber) matches your existing board for visual confirmation.
