When I type it is printing different letters than I am typing.

Hammer sticking and typing incorrect letters (and or skipping letters): 1) make sure daisy wheel installed correctly. 2) hold down CODE key & Q (RESET) to reset wheel...if still not corrected 3) WD40 the hammer at the base & joints where moving parts are, keep typing until oil seeps in (this last one fixed it for me)

Typing light and inconsistant-top part of letter okay but bottom too light or not there: to left of hammer (at base) are 2 screws, I losened them and adjusted hammer to different forward and backward spots..finally found the ideal location where full letter printed and had the correct force it needed to print correctly.

While typing on my Smith Corona KA13, suddenly different letters and characters would type instead of the ones I was typing. Like an "H" instead of an "R". An "S" instead of a "D"..... Any help please..

You might have a "proportional space" printwheel but the pitch selector is on 10, 12, or 15 instead of PS. OR it is on PS but you have a normal print wheel. Try selecting different pitches. Another thing that causes that problem is sometimes the ribbon or correction tape gets caught in the printwheel.

The selection motor bearings just right of the print solenoid get dry a little WD40 on the front and rear bearings usually takes care or this.

DickyO

Check and see if the pitch selection is in PS.

DickyO

Media paper weight: is 20lb or 75gsm.
Media type: card stock, envelopes, Glossy paper, Paper Labels, Plain Paper, Transparent.
Media size: A3, A4, A5, Banner up to 11.69"x36", Executive, JIS-B4, JIS-B5, Ledger, Letter, legal, Super Tabloid, B5, C4, C5 DL, 7 3/4 9, 10 Envelopes.
demension is in inches, you need to convert it to centermeter.

take to a repair shop or get a new one, no easy fix for this

I downloaded the manual from http://www.devicemanuals.com/downloadguide.php and then, following the instructions there, I removed then re-inserted the daisy wheel. This solved my problem. Perhaps it had somehow gotten out of adjustment. At least, it is something to try if you haven't tried it already.

If it types only the top half yhe platen is probably not all the way in. Make sure the 2 black latches are lined up with the side frames then press down firmly on both sides of the platen.

DickyO

If the ribbon isn't moving a full space for each letter printed try code . or , this changes yhe spacing.

DickyO