Sharp SF-7700 - High Voltage Units

[9] HIGH VOLTAGE UNITS
1. General description
There are two ooronasused in the oopier;,W main, and transfer,
~rona units.me mdrf oorona~lies’ a unif~ negativeme
to the drum surf-. The tr~sfer mrona is used to transferthe
toner from the drum onto the ~ paper by ~yi~ a ~ative
charge from the bad of the mpy paper.
2. High voltage units
(1)Main
hjgh voltageunit (MHVG)
Dcoutput=
-6.OWDC, 640@
*1 .O@, differe~ b~~n fr~ @ rea
?Z:”::! ‘!>:$,
(DCD current=
-14 ~$~0#, differe~ betweenfrontand rear =
*, mm:
2yd
3. Discharge lamp
Thedi@arge lamPisusedtoremoveraaMu~~~e ~~dmm.
4. Corona wire replacement
Refer to the figure ba~ for replaument of the @rona wire.
(1)Maincoronaunit
ViewfromA
View fromB
(2) Transfercoronaunit
I
— -
Coron&wire
,.o,&%~
ViewfromA
Viewftim B
ITransfer coronaremoval)
~ Remove three trans~~ guiw ~rews and one transfermrorfa
screw,and removethe trans~rf guide unitfromthe ~pier.
~ Removethe separationtaps from the transfercoronaunit.
~ unhookthetransfermrona housingat twomtions andremove
the tran~~ unit by lifii~ the transfer aona houSng in tie
arrowdir~tion.
Transtar=a _ ‘
,
5. High voltage unh output adjustments
(uCD),
(1)Tools quiti:
@
DCD test sheet (UK~-guide OllOFC~
UKffi-OllOFCn
,,
9-1