40496501TH Draft Version 27
(2) Slit encoder
As the space motor rotates, it generates feedback pulse signals SPA-P and SPB-P. The Main
LSI detects the edge pulses from these signals and multiplies the frequency to output the
S720-P signals as the normalized timing to NHDC LSI to generate head drive timing.
2.1.11 Line feed
The LF motor is locked by the current supplied from +12V according to the pulse duty of the
LFCHOP-P signal during the stop period.
It is driven by +44V application by the LFOVDV-P signal for line feed operation.
SPA-P
SPB-P
Edge pulse
S720-P
UTILITY MODE
ITOUT 10CPI
ITOUT 12CPI
ITOUT 15CPI
ITOUT 17CPI
ITOUT 20CPI
1/360"
1/120"
1/144"
1/180"
1/206"
1/240"
LFø1
LFø2
LFø3
LFø4
LFOVDV-P
LFCHOP-P
Figure 2.14
Figure 2.15
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