4-12
UP-D70XR
e)
Line quantity correction IC
This IC corrects voltage changes of head elements that is turned on the electricity by 1 line.
Data is input from IC208 through 210, according to it’s data quantity, width of head STROBE (CN7-
25) is adjusted.
f)
Head voltage control
This unit does not need the head voltage adjustment basically. But head voltage is not always
stabilized by heat store of the head or difference between papers. When head voltage is less than 16V
or more than 23V, the head or power supply is abnormal.
g) Head control section timing chart
nHED_ACTV0
BUS
→
IC204
nDREQ
IC307
→
BUS
nDACK
BUS
→
IC307
DCK0
BUS
→
IC204
MDB0-7
BUS
→
IC204
PRNT_PLS0
CPU
→
IC204
nHED_ACTV1
IC204
→
IC208-210
nDREQ1
IC204
→
IC208-210
nDACK1
IC204
→
IC208-210
nHED_LATCH
IC208
→
HEAD
nSTRB
IC211
→
HEAD
DCK0
IC204
→
IC208-210
PD0-7
IC204
→
IC208-210
HED_CLK
IC208
→
HEAD
HD1-20
IC208-210
→
HEAD
PRNT_PLS1
IC204
→
IC208-210
Содержание UP-D70XR
Страница 1: ...DIGITAL COLOR PRINTER UP D70XR SERVICE MANUAL Volume 1 1st Edition ...
Страница 4: ...2 UP D70XR 6 Troubleshooting 6 1 Mechanical Section 6 1 6 2 Electrical Section 6 3 ...
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Страница 27: ...1 21 UP D70XR 80 Divers Sony Corporation Printed in Japan ...
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