Fujitsu DL7600 Maintenance Manual page 170

[Ribbon motor drive circuits]
The 4-phase ribbon motor (Bi-polar stepping motor) are controlled by the constant current drive
circuit shown below.
+40V
FPGA
FUSE
(FE2-12E-5FN484C)
HIC4 (A3953SLB)
RFM0-3
RLFM0
SG2
M
HIC5(A3953SLB) FUSE
SG2
Figure 5.3.18 Bi-polar motor drive circuit
170