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Model # 850 Official Texas Instruments business center

Here are the diagrams and repair parts for Official Texas Instruments 850 business center, as well as links to manuals and error code tables, if available.

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For DIY troubleshooting advice and repair guides, visit our repair help section.

Model diagram and schematic

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ALL PARTS

Showing 10 of 138 parts |

Control Panel - Tan 2238671-0002

#NI

All parts diagram

Control panel - tan

Part #2238671-0002

The manufacturer no longer makes this part, and there's no substitute part

850c Terminal Electronics Board W/ground Plane (see Note 1) 2222545-8001

#NI

All parts diagram

850c terminal electronics board w/ground plane (see note 1)

Part #2222545-8001

The manufacturer no longer makes this part, and there's no substitute part

Cable, Parallel Printer 2223106-0001

#NI

All parts diagram

Cable, parallel printer

Part #2223106-0001

The manufacturer no longer makes this part, and there's no substitute part

Rs-422/rs-232-c Options And Accessory 2222542-8002

#NI

All parts diagram

Rs-422/rs-232-c options and accessory

Part #2222542-8002

The manufacturer no longer makes this part, and there's no substitute part

Exit Roller Assembly With Shaft 2222485-0002

#NI

All parts diagram

Exit roller assembly with shaft

Part #2222485-0002

The manufacturer no longer makes this part, and there's no substitute part

Cover, Power Supply Piece Parts 2239417-0001

#NI

All parts diagram

Cover, power supply piece parts

Part #2239417-0001

The manufacturer no longer makes this part, and there's no substitute part

System Rom (860xl - Xu2) (see Note 2) 2239398-0001

#NI

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System rom (860xl - xu2) (see note 2)

Part #2239398-0001

The manufacturer no longer makes this part, and there's no substitute part

System Eprom (851 - Xu2) (see Note 2) 2222478-0002

#NI

All parts diagram

System eprom (851 - xu2) (see note 2)

Part #2222478-0002

The manufacturer no longer makes this part, and there's no substitute part

Platen Assembly 2239447-0001

#NI

All parts diagram

Platen assembly

Part #2239447-0001

The manufacturer no longer makes this part, and there's no substitute part

Carriage Motor With Pulley 2239451-0001

#NI

All parts diagram

Carriage motor with pulley

Part #2239451-0001

The manufacturer no longer makes this part, and there's no substitute part

Symptoms for gas walk-behind mowers

Choose a symptom to see related walk-behind mower repairs.

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Main causes: damaged cutting blade, loose cutting blade, damaged flywheel key, engine needs tune up…

Why does my lawn mower cut unevenly?

Main causes: uneven wheel height settings, damaged wheel, dull or damaged cutting blade…

Why does my lawn mower run rough?

Main causes: engine needs tune up, dirty or clogged carburetor, damaged flywheel key…

Why won't my lawn mower move?

Main causes: drive control cable failure, worn or broken drive belt, bad transmission, broken drive wheel…

Why won't my lawn mower start?

Main causes: stale gas, engine needs tune up, bad spark plug, dead battery, bad recoil starter, faulty safety switch, ba…

Why does my lawn mower stall?

Main causes: dirty carburetor, bad spark plug, clogged air filter, engine choke problems, clogged gas cap vent…

Repair guides for gas walk-behind mowers

These step-by-step repair guides will help you safely fix what’s broken on your walk-behind lawn mower.

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How to replace a lawn mower recoil starter on an OHV engine

How to replace a lawn mower recoil starter on an OHV engine

Replace the recoil starter if it doesn't move when you pull the starter rope.…

Repair difficulty

Time required

15 minutes or less

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How to replace a lawn mower wheel

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Repair difficulty

Time required

15 minutes or less

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