The 1132 was built around a stripped down IBM 407 printing mechanism. The 407 was IBM's top-of-the-line accounting machine from the 1950s. The 1130 had 120 power transistors, each wired to the print wheel solenoid for a printer column. As the set of 120 print wheels spun, the 1130 received an interrupt as each of the possible 48 characters moved into position. The printing driver software had to quickly output a 120 bit vector designating which transistors were to fire to press the print wheel against the ribbon and paper. This put a big performance burden on the CPU, but resulted in an inexpensive (for the time) printer.
Sometimes a printer output line transistor would fail, resulting in a blank print position. If you knew your way around inside the 1130, it was possible to swap circuit cards so as to move the bad print position to near the right end of the printed line. This kept the 1130 usable until the repair person showed up.
The 1132 came in two models with the following characteristics: