Tx Motor Drive Circuit - Toshiba DP120F Service Manual

3.10 TX Motor Drive Circuit

The TX motor drive circuit consists of the PTC GA (IC45), Motor driver (IC70), and other periph-
eral devices. It drives the stepping motor connected to CN8 on the Mother PBA in 1-2 phase
excitation/2 phase excitation mode to transport a document in facsimile transmission and copy
mode.
The PTC GA outputs the MT1A, B, AX and BX signals and the MT1C0 and 1 signals to the
Motor driver. The Moter driver generates the OTXA, B, AX and BX signals based on the input
signals and outputs them to the TX motor. The TX motor is driven in steps according to the
input drive phase signals.
Signal Name Type
MT1A, B, O
AX, BX
MT1C0, 1 O
OTXA, B, O
AX, BX
March 2000 © TOSHIBA TEC
Fig. 7-3-10
Active
- Tx Motor A/B/AX/ BX Phase Signal
- Tx Motor Current Control 1/2 Signal
- Tx Motor Drive A/B/AX/ BX Phase Signal
Description
7-43
Destination
IC70
Q2, 257
TX motor
DP120F/DP125F Circuit Description
07-03-10