SF-7700
SF–7750
@ Insert a ~rewdnver throughthe hok (two ~
s) end turn
the paper separationsensor mntrol PWB potentiometer VR1
and VR2 ful~ oourrter-iaa (arrowheadA). .
@ Turn the poweron.
@ With the doorawitch(DS~ open (0~, ex~ute test oommand
25.
vest oommand25 paure)
c + P + 0- P + @ + @ + psw
@ Manudiy aduate the doorewitch(PS~.
@ Sldy turn VR2 d-se (mwhead B) and stopit whenthe
MISFEED Imtion indiator lamp (separationunit)flickers.
@ Fully rotate VR1 ~Mse (arrowheadB) and make sure that
theMISFEED Iooationindiator iamp(separationuti)goes out.
10. Pr~Mions
@ Do
not open the_ unitat the same time withthe pr~
Unti.If if ia opened at the ~me ti~, dist~on is ~u~ in tie
frame end if may resuhin image dietortion”(tis deviation,etc.)
end irregularnoise generation.
x
@ Asa differenttransferguidetensionspringisusedbetweenthe
frontframe and the rear frame, the one on the frontframe side
is SWer and the other one on the rear frame side is blti.
Inetaflationof the springin the wrong btion may reeunin en
image diatotion and a transferfailure.
@ Before unfasteningthe mnn-or ~tween the opticalunk.and
the prwees unit, the power must be fumed off.
,’
14–5
.__—
~ Cautionson ins@lingthe OK drum
Do the fol~ng after itiling new O= dmm or applyingthe
startingpowderover the O= drum surfam.
Press C + P + O+ P + ~ + @ + PSW to exwute test
remand 25. As the drum eeverd revolutions.
This is to prevent impmper oper~~n of the peper Sepaation
senior.. c’
11. Pa~r misf~s
~s
of paper misfeeds
@ Misfeed, MS1 does notaduate
. MS1 failed to atiate within2.6
~ds after the adivation
of the upper
~tte paper feed solenoid(UPFS).
. MS1 f~i~ to @ate ~hin 1.8 ~~safier ~VatiOn ofthe
lower~aette paper feed ~ienoid (LPFS).
May be a failure in MS1, UPFS, LPFS, takeup dler, obj~ in
the paper path, or use of irregularpaper.
@ Misfeed, MS1 d~,~t ~~m.
. MS1 f~led to d-ate within4.3
~de after @vation of
the paper stop*noid (PSS).
May be a failure in PSS, MS1, PS roller, ob~ in the pa~r ,
path, or,use of iwegulerpaper.
@ Misfeed, MS3 does not aotuate
● MS3 failed to ~ate within3.2
~s after the a~ation
of the paper stop~tikf (PSS).
May be a failure in PSS, PS roikr, MS3, separatorunit,fuser
~k(se~ratorpati), objeotinthepeperpati, orfi’sWsition.
@ Misfeed, MS3 doesnot return.
o
. MS3 fei~ to de~ate within3.2 s~ds afterthe actuation
of M=.
May be a failure in MS3, paper Wivery roller,or MS3 ~yed
atiated by the -r trailedge as the lead edge is stoppedby
something.
@ Manual m~eed-1
. MS1 fai~ to -ate within
8 mrrds after the a~ation of
MS4.
May be a failure in MS1, obetru~n on the paper path (feed
roller, alien ob~), or the paper is heu up by ~ur fingertip
beforethe paper lead edge raatiee MS1 after ~ating MS4.
@ ManuA miafeed-2
. During muhtipy MS4 .atiated within 900ms after the
0
dmation of MSl by them edge of the last paper.
Manual feed is not dbwed in the mul~y mode.
. Duringsingle~
MS4 ~ated withinSOOrnsafter the deamafion of MS1 by
the trail edge of ,ti ~~r.
@ Paper aught up aroundthe drum surfam
. Paper det~ad.~ the dmm sudaoewhile the main motoris
in rotation.
May be a failure in the r-
er tape, mr in the paper feed
(paper notmught by the removertape), s~ation det~ error,
~ failure in the paper @tfon sensorPWB.
@ At poweron or when the door is dosed
e
. MS1, MS3,orMS4 failed to .a@te.
May be a failurein MS1, MS3, or MS4, paper remainingwithin
the machine. Ptir MS1, MS3, or MB4 mn~r seating may
also -use a papermiafeed.(It am as ifa paperis in the paper
path.)
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