Outage planners treat servo termination hardware the way they treat the servo valves themselves: as components the unit simply cannot run without. This IS200TSVOH1BFC — part number IS200TSVOH1B at the FC revision — is offered as new surplus in its factory package, the condition many sites prefer for shelf spares that may wait years before being called into service.

A Factory-Packaged Spare for Critical Valve Control

The TSVO Servo Terminal Board is the Mark VI interface to two electro-hydraulic servo valves — the actuators positioning steam and fuel valves — with LVDT position feedback wired to the same board so each valve's true position returns to the control system. Because a single board carries two complete valve loops, losing one to physical damage can affect two critical valves at once; that arithmetic is why TSVO appears on so many critical-spares lists. Simplex installations connect through JR1, TMR installations distribute the signals across JR1, JS1, and JT1 for the <R>, <S>, and <T> channels, and plugs JD1 and JD2 give the protection module an external trip path directly into the valve interface.

Confirm the Diagnosis Before Committing to a Swap

Even with a spare on the shelf, verify the failure before opening the package — an uninstalled board in factory packaging is worth more to you than one installed against the wrong diagnosis:

• Servo current alarms usually mean valve coil or hydraulic trouble; measure resistance at the terminals and check the valve before the board.
• Feedback out-of-limits alarms usually mean LVDT or wiring trouble; prove excitation and continuity first.
• Faults isolated to one redundant channel point at cabling or the servo processor for that channel rather than the shared terminal board.
• An ID chip failure reported for the board position is the clearest genuine reason to install the spare.

Two practical notes from GE-derived documentation for the swap itself: on Mark VIe systems the PSVO I/O pack must be manually reconfigured after a terminal board change, and servo performance can be proven afterward by manual stroking, position ramping, or step-current tests with the response watched on a trend display — a sensible acceptance test before returning the loop to automatic.

Understanding IS200TSVOH1B and the FC Revision

The number reads IS200 (Speedtronic board series), TSVO (Servo Terminal Board), H1B (hardware group and version), FC (production revision). Revision letters advance as GE updated artwork and components, so an FC label simply identifies this build; order against the full string on your existing board and we will match it or tell you exactly what we can offer instead. For the field-by-field logic, see our GE Speedtronic Part Number Decoder.

Mark VI Today, Mark VIe Tomorrow: Where TSVO Still Serves

In the original Mark VI architecture the board pairs with the VSVO servo processor over two cables — the J5 plug on the VSVO front and the J3/J4 connectors on the VME rack. In Mark VIe systems, the IS220PSVO Servo Control I/O pack is documented as the electrical interface between a TSVO terminal board and one or two I/O Ethernet networks, handling two servo valve position loops. A spare TSVO therefore keeps its relevance through a control system migration, which strengthens the case for holding one. The related hardware is gathered in GE Mark VI IS200 Boards and GE Speedtronic Turbine Control Boards, and the platform evolution is charted in Mark V vs Mark VI: DS200 to IS200.

RFQ Essentials for This Part Number

• Complete part number with revision — IS200TSVOH1BFC — as shown on your label or drawing
• A label photo from the installed board, if accessible
• Turbine model, control platform, and the servo electronics in use (VSVO or PSVO)
• Loop redundancy: simplex or TMR
• Quantity and whether this is outage-critical or planned stocking

How We Handle Your Order

Click Request a Quote, include the details above, and expect our answer within 24 hours. We work from purchase orders and deliver DDP to plants worldwide — customs, duties, and clearance handled before arrival. The condition and warranty applying to this factory-packaged unit are recorded in the table below.

General Information about the Product
Part Number	IS200TSVOH1B Mark VI IS200
Description	IS200TSVOH1B by GE IS200TSVOH1BFC Termination Servo Board New Factory Package
Condition	newSurplusFactoryPackage New Surplus Factory Package. With 1 Year Warranty