Line Feed Circuit - OKIDATA Pacemark 3410 Service Handbook

2.1.07

Line Feed Circuit

Whenever it is in a stopped position, the line feed motor shaft is held stationary by +8vdc, which
is enabled by the LFCHOP Signal from Q2. The holding current is approximately 30 ma.
During a line feed operation, the line feed motor is driven by +38 vdc in accordance with the
LFOVDV signal. The signals LF - Phase 01 and LF - Phase 04 establish the proper phase
relationship for driving the motor. However, the line feed motor uses Phase 1 - 4.
2-F.pcx
Pacemark 3410 2 - 9 Principles of Operation