Question about Brother SX-4000 Typewriter

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Types random letters

The problem is, regardless of which mode of operation it is in ( i.e., Auto, line-by-line, or off), at times the machine will not strike the pin wheel and lose it's pin wheel location, making a clicking noise, but the carrier advances as if it has typed. If set on line-by-line and it begins to malfunction as stated above, or if the hammer begins to strike after it has began to malfunction, most of the time the pin wheel will be out of whack and you get the wrong letters. To fix it, sometimes the reset will work and other times the machine will have to be shut off and restarted. I have taken the wheel out and checked for bent areas and dirt but found nothing.

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Re: Types random letters

If you cleaned the printwheel home sensor and found no obstructions, I would first try a different wheel before going any further, sometimes they become damaged.

Posted on Mar 23, 2007

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