Smith Corona
Office

Model # SD660(5ACH) Official Smith Corona typewriter

Here are the diagrams and repair parts for Official Smith Corona SD6605ACH typewriter, as well as links to manuals and error code tables, if available.

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Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

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Model diagram and schematic

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Showing 10 of 413 parts  |

Transistor 702518

#NI

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Transistor

Part #702518

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

Resistor 760455

#NI

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Resistor

Part #760455

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

Capacitor 730022

#NI

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Capacitor

Part #730022

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

Resistor 701263

#NI

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Resistor

Part #701263

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

Ic, Til-ls 709683

#NI

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Ic, til-ls

Part #709683

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

Resistor 701270

#NI

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Resistor

Part #701270

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

Capacitor 700341

#NI

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Capacitor

Part #700341

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

270 Ohm J 701253

#NI

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270 ohm j

Part #701253

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

Capacitor 730012

#NI

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Capacitor

Part #730012

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

Capacitor 736111

#NI

All parts diagram

Capacitor

Part #736111

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

Symptoms for water softeners

Choose a symptom to see related water softener repairs.

Main causes: faulty brine valve assembly, bad rotor valve…

Main causes: clogged drain hose, faulty rotor valve, leaky rotor valve seals…

Main causes: salt bridge inside the salt tank, bad timer, valve motor failure, faulty rotor valve, clogged venturi…

Main causes: loose water line connections, cracked water-carrying components, bad rotor valve seals…

Main causes: lack of electrical power, bad power transformer, faulty timer…

Main causes: empty salt tank, salt bridge, depleted resin, clogged or damaged venturi, broken rotor position switch, fai…

Main causes: broken resin tank screen, bad resin tank seals, cracked upper distributor in resin tank…

Main causes: broken water flow meter, faulty timer, water flow to softener is bypassed…

Repair guides for water softeners

These step-by-step repair guides will help you safely fix what’s broken on your water softener.

How to replace a water softener venturi

How to replace a water softener venturi

The venturi valve in your water softener draws brine water from the salt tank to the resin tank for regeneration. Follow…

Repair difficulty
Time required
 15 minutes or less
How to replace a water softener rotor position switch

How to replace a water softener rotor position switch

The rotor position switch detects the position of the valve rotor. If the rotor position switch fails, follow these step…

Repair difficulty
Time required
 30 minutes or less
How to replace a water softener timer

How to replace a water softener timer

The timer is the control board you use to program the water softener. If the timer isn’t accepting commands when you pus…

Repair difficulty
Time required
 15 minutes or less

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