Sharp SF-7300 User manual

S
SF-7350
SHARP SERVICEMANUAL
9CODE:OOZSF7350SM-E
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A
BASICSPECIFICATI
A
UNPACKING ANti -v/
SUPPLIES . . . . . . . . . . :, ‘.
E~ERNALAND lNTERNAL@;
SF-7300
MODEL SF-7350
“k
,.*,
DESCRIPTION OF EACH BLOC . . . . . .
@*
PAPER FEED UNIT ................
.:. .A
TENTS ->
1
..............................1-1
~.. ......,,:
................2-1
.&..
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*
3-1
.‘A. ’.... . . . . . . . . . . . 4-1
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HIGH VOLTAGE UNmS ...............**(i
OPTICAL SYsmM ........................ ..........
................5-1
................6-1
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DEVELOPER UNIT .................................. .
FUSERUNm . . . . . . . . . . . . . . . . . . . . . .... ....... ......1 —L
copyQu~~fiADJusTMENTs ... ....... ... W. ........... . ..4
OTHERS .....’ ............................................. ‘... ..... ~-,
Y
MAINTENANCE .................................................. ::. ..13-1
.....
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SELF-DIAGNOSISANDTEST FUNCTIONS ........................ ... ..: ....14.1
[la OUTLINE OF ELECTRICALSECTION ............................ ... ... ....1$1
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SHARP CORPORATION
——. —-——— .—-————>.—-- .- -——--.- -- ---———-—.
.- -. —.

SF-7300
SF-7350
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FEATURES
●hSP73W isasuccessorto the SF7~0,
:,
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..-.,
Wfdbting ehm the comparbon of WSF7350 features vs.
SF-7200.
WSF-7300 is the SF7330 -out tie va~e magnification
feature.
SF73WSF7300
Options
[SF73W ISF7300 I
1+1
SF720DU (Ma&ineAdd) t
SF71M1B (Personal&nter) +
. . .&—

SF-73OO
SF-735O
[I] BASIC SPECIFICATIONS
L
-. ----
rype: Desktop
;opyingsystem: Dry-typedectrostaticplainpapercopier
(indaofo~inds: Sheet, book
>rginelsize: 10- x14-(M), m=imum
.
~qy size: 10”X14”(~) to8-1/7XS1/2”(A6)
Mopy speed: Cassette feed Muti-byp=s stacker(optkn)
M(8-1R%117 ‘i’; ‘;’; “;’: m‘N:’wy
84(8-l~Y14~
95 (8-1R%S1R7 13CPM 12CPM 10GPM
N: N-al, R: Reduction,E: Enlargement
Fjrstcopy: 8secti, maximum +
Narm uptime: 45 seconds,maximum(at ratd v~~ ati roomtemperatureof *-w Fahrenheit(20 t
degrees centigrade),and rdat~e humid~ of65Y0.)
MuMcopying: 1to 99 cqies, 10 key input,countdowntype, Wauto repeat. +
Magntiicationratio: Normal 1:1*1% t
Reduction Reductin ratiok 1% —
Enlargement —
Enlargementratk* lYo —
AB mfles Irishseries (Normn~;opy
1:0.7,1:0.6,1:1,1:1.24 1:0.64,1:0.75,1:1,1:1.24
Paperfeed system: Cassette automaticfeed (approx.250 sheets)andaingfemanualfeed. +
MuM+ypass stacker(wtion)(wox. 50 sheets).
Exposuresystem: Sfitexposurewithstationa~ @atenand movinglightsource,variabb lightsourceilbdnation. t
Devdopingsystem: Two componentmagnetisbrushdevdoprnent@aitive~ chargedtonerand negs~~ chsrge G
carrier).
Tonersup~y: Automatictonercontrolsystem,%magneticsensor. +
Photocorrductoc OPC drum(~) +
Paperseparationsystem: Sqeration withthe removertape and separationroller. +
Cbanirrgsystem: Bkde cleaningofthe drum. t
Originald~nment: Frontframe, leftaide alkned. +
charge system: Negative DC corona. t
Transfarsystem: Negative DC coraa. -+
Dischargesystem: Drum:optiod dischargeby mean ofadischargebmp. +
Copy paper:&charge by meansddbcha~ brush.
LigMsource: Hakgen hmp. +
Powerrequirements: 10W110VAC, m60Hz. +
120VAC, WHZ +
200VAC, 60Hz +
220VAC, 50160Hz t
240VAC, 50Hz +
Powerconsumption: 1350W, max., operatingand 150wfi averagedudngstandbyand reedy (*25.C) +
Fuei~ system: Heat rdb ~pe. G
Upper heat rdbr: Tefloncoated +
Lowerheat rolbr: silicon +
Physicaldimensions: 577mm (22.~ widex530mm (~.87 dew x340mm (13.37 high &
917mm (36.17 We x530mm (~.~ deep x340mm (13.37 h~h withthe muti~~ae stackerin +
use.
We@ht: A~roximate~ 34.5Kg (98.9 Iba)withdrumenddevdoper. 33.*g (96 bs
Anarrowmark‘+-in the SF7300 columnshowsthatthe descriptionis the same as that ofthe SF-7350 and adash “—”indkatee thatthedescription
vdoes notapplyto the SF-73OO.
*The copyspeed fromthe muk~bypaasstackeris bwer thanthe cassettefeed because p~er feed distanceis bnger.
l-l

SF-7300
SF-73S0
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[2] UNPACKING AND INSTALLATION
1. Unpacking
Partnames
1Packingcase
2Packingcushwn
3PP tapex2
4Originalcoverprotectivematerialx2
5C~iar
6Paper receivetrayinpowbag
7Waste tonercontainer
8Bottomcase assy
9AC cordsbeve
I10 IInstruct.bnmanual I
2. Installation
Installation requirements:
Pbase notethe folbwingr~uirements when installingthe copier.
(1)Machine Environment
1) Avoid
lnstaflatbnin drect sun~ht Hb@ht Iocetbns near aw
dew.
Directsunlightmay cauae tie phwk Mmponents and the origir
coverto deform.Frostedgbse may SfSOproducethe same effect.
2)
3)
4)
5)
6)
3
Avoidinstallationin ahot, da- area or where rapidchanges
humidityoccur(forexampb; near an air c~ner).
This may cause p-r to dampen or mobture to cdbct insk
the cop&r, bediw to tisf~ ati adet~icmtbn in cq
qud.hy.
The recommendedenvironrneti conditionsare:
20 to 25 ~rees C(66 to ~~r~s F.), 6~Y0RH.
The nominalenvironmentconditfongare:
15 to30 ~ees C. (59 to 66 degrees F.), 20 to857eRH.
If the +W is to be instited in an ares of ~her temperature
the humiditymust be bwer. Exampte; If the temperatureis :
degrees C. (95d~reee ~, the hum”.i~ shoutdh’65Y~.
%RH
~- --------
~
~~ - --------- .------. :--
Hu- :
20- ---------
,15 M35 t
Temperature
Avoid installation in apkce where dust or vibration is en-
countered.
Dustdepoe.ti instie of the copier may bad to adeterbration of
copyqud.~ or machinetroubb.
Do not installthe copieron an unstabteor uneven surface.The
copiermustbe @aceda a bvd surfaceto permitpropw opera-
tion.
Avoidinstallationin apkce where the verrtibtionor air circula-
tionispoor.
Never install the ccpier near ftamm~b materbb or mthe
presenceof ammonh fumes.
Instsftatiorrnear adhzo copy machine may bad to adeterbra-
tbn ofcopyqua~ or amac~ne matfunctbrr.
Instauthe copier near the wstl outbt, do not use an efieneion
cord.
(2) Space around the copier
The qier requires at least IOcm (49 dcbarance between the
rear side and the watt.This space is requiredfor prcper c~ting fan
ventilation.Adequate woking space around the machine shouti
abo be allowedforease ofoperatbn and Serv.ke.
(3) Copier table
Install
the machine on alevel sutiace. Place awater bvel
(UK~MO054CSZ mthe center &the originalgfase and check
levelfrontto rearandsideto side.
NOTE: The tonerdensity ati copyqualitymaybe affectedunless
the machineis insta~ on abvel surface.
2-?

I“-
SF-7300
S*’-735O
(4) Power source
1) The powersupplylineshcu~ have acapacityof morethan 15A,
capable of supplyiW more than WY. of the rated vokqe at fun
load.
2) Do not use an extensioncord or operate any other quipment
fromthe same wall outlet.
(5) Ground connection
1)Use aprcperv grounded(thr- pr~) wd odet that meets an
nationaland localebctrfcalcodespecifications.
How the copier machine Is carried
When moviW the c+ier, remove the receivingtray and carry it
by btiim the Identath intie bottomof the ma&ine.
3. Releasing locks and installlrtg supplles
A. Removing the developer unit
(1) Open
tie frontpanel.
(2) Pullthedevdcper unitkver towardsyou.
=1
1
(4) H* the ca~ handk ofthe deve~r unitand removeit.
NOTE: Unfeeethe devefcper unitis he~ by the handle,the
deve~r unitmay notcome out.
B. Releasing the optical block lock
(1) Removemirrorbm unit(No. 23) hddiW mrews.
(2) Removemirrcrbese(No.4~ hofdi~ecr~ (SF-73Won~).
H4ing screw
(Frontframestie)
2–2
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SF-7300
SF-7350
Drum;wer Ho~i~ shaft
C-1. Installing the dmm
(In some of the machines,dependingon htirr, the drum has #
reedy been in~fled at the factory.Execute C-2 if bdrum was im
statfedmthe copier.)
(1) Push the time open lever to open the dam shell
mechankm.
(2) Uuptfreleverto removethewastetoner container.
(3) Open thedrumcover(onescrew).
(4) Unfasten two connectorsand one scrw, and remove the
drum unit.
(8) Fastentwoconnectors.
C&e thedrumcover.
Securethedrumunit~twoscrews.
If the die~arge hmp mnnector was not corr~ed, th,
tmu~e sta~s cde “P% till be dbptayed when the power i:
turnedon.
(9) Chethe unit.
H* the waste tonercontainersensorphte down, and instal
the wastetonercontainer.
“/
(10) Instaflthedrumunhal~tfreguide inthec~.er.
2–3

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---*-”””---
SF-7300
SF-7350
F@. 1
C-2.Remove the drum protw sheet
(Machinewithdrum instal~)
(1) Push down on the frame open ber to open the clam shell
mechanism.
(2) Gent~ removethedrumprotectsheet.
/-”
Protectie sheet
D, Installing developer
(1) Remove the toner hopper from the deve~r unit (four
screws).
IMPORTN: It is impotit that the MG roller gear be
turned in the arrow dir=tin, otherwise,
deve~r mayleek undertk MG roller.
(4) Installthe toner-r onthe devd~er un~.
Do notimwll the &ve@r untiinthe machineatthistime.
E. Toner control sensor (TCS) level adjustment
(1) Make sure that the deve~r unit is not inetal~ in the
copier.
(2) Turnpoweron.
(3) Turnonthe cabinetstich (CSW) usingthecoronacleaner.
~tiOUbkStStUS‘CH- til %sh.)
FCoronackaner
(2) Plain ascrewdrher handfe under the bottom of the
deve@r unkandtikthe deve~r unitse *W infig. 1.
(3) Load afull beg of deve~r into the deve~er unit whib
rotatingkMG roflergear intie arrowdirection.
(4)
.
#“’
=ecute test commandZbutdo notpushthe PRINT switch.
c+yo4Q/o+ c+ 2+ 5
installthe deve~r unitinthec@er.
Pushthe PRINT fich.
Test command25 sta~ and stirsthe devdoper for aperiod
ofthree minutes.
Push the PRINT switchagain after the devdoper has com-
pbted Stimng.
Turn the toner controlsensor hel adjustingpot chkwbe
untilthe TPL lampturnsON.
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SF-7300
SF-7350
/
{
/(
Tonercontrolsensorleveladjustingpot
/
Level adjustingvoiume
\-
About200 degrees
NOTE: Do notrotatethe pot morethan200 degrees witw.11
be damaged.
(8) Sb* turn pot counter clockwiseand stq when the toner
farnp~PL) justgoes out.
NOTE: Turningon the power with toner in the toner hopper
and the toner sensor not adjusted may affect the
toner concentratiorr.To achieve pr~r toner bvd
the above procedure to set up the TCS bvel must
be perfoti stadng withstep E.
F. Installingtoner
(1) Load toner in the toner hopper after the cornpbtiorrof the
tonercontrolsensor(TCS) bvd adjustment.
G.Confirmingthemodeltypeandlocalmode
program
(Checkmethod)
(1)
(2)
(3)
(4)
Executet=~ command79.
When thistest commandis executed,the modd typeandthe
bcal mode sew data currentiystored in the memo~ (see
the tabb bebw) are displayed, and the READY lamp turns
on.
You will now enter atwdigk number shown in htabk
after the READY lamp turns ON. The numbermust match
the modd type ad the localmodesetdng.
Pushthe PRINT switchto storethe numberinthe memory.
The READY lampgoes outa~er the numberis stored.
Push the CLEAR key twice to terminate the teat command
79.
L-
mode Model
VP Ld standards
number
00 Japan
02 SF-7300 Export AB Se&S
03 InchSetis
04 Japan
06 SF-7350 AB SerbS
07 Export Imh Wti$
H.Coronawirecleaning
a.Main corona
(1) Turn the mainpowerOFF.
(2) Open the hont cover and pull the main corona unit dowly
out.
(3) Hti the coronawirebetween the tipsof the coronacleaner,
and wipe the wire movingthe cleaner in the directionindi-
cated on the coronahandle.
●Put aIittb abohol on the ckaner ifthe coronawire is par-
ticuldydi~.
●Do notbend or pullthe wire.
kJ
(4) Push the main corona unit back into @ace and closes the
frontcover.
b.Transfercorona
(1) Push down on the frame open bver to ~the clam shell
mechanism.
(2) Wti the transfercorona unitstillinstal~, ckan the transfer
‘coronaW.rewiththe providedcksner.
-— 2–5
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SF-7300
SF-7350
1.Removing the cassette prot=tive tape
(1) Take outthe cassetteand removethe protectivetape.
4. Copy ch=k
CopyCM is rquired at every maintename call.
(1) Image skew
1.5mm, m=imum
(2) Void area and image loss
BMakeacopymthe
normal mode and chedr to see that the void
area and the image 10ssare withinthe givenlimits.
Sde marginvoti area 5to 8mm
Lead edge imageloss 2.*1 .5mm
Side marginim~e 10ss 3.3 to9.7mm
(3)Copy density
1) Manual exposure
(1) Place the test chart (UK~Q88CS~ or KODAK Way
scale onthe tiginal ta~e.
B(2) Set the machinein the manualexposuremode usingthe ex-
posuremodese~ key.
The sopydensityirrdisatorturnsoff.
Set the exposuremntrd knobto 1,0 (light).
(3) Make acopyinthe normalmodeand e- the copydensity.
Baaio-y density(manual exposureat 1.0 (light))
0.2 0.3 0.5 0.7
uKoG-oo’gcszz-
B..T.Y LLght,copied
2345
KODAK GRAY SCALE h
(4) Set the exposurecorrtrdto 5.0 (dark).
(5) Make acopyinthe normalmodeand chesktie copydensity.
Bask -y density(menud exposureat 5.0 (daA))
00.1 0.2 0.3
UKOG–0089CSZZ
4+
9A123
KOOAK GRAY SCALE
44
2) Auto exposure
(1) Plaoeatestchad onthe originaltebb
—Plase foursheetsofblankwhitepaper, 120mm x360mm, on
top of each other and pk= the teat chad (UK@-
O08XSZZ) or
KODAKgray s~b bestie oron it, sothatthe grayssak pcr-
tionofthetestchartiscopied.
Teat *rt or KODAKgrayscab
\Teat &art (UK=40890Sq
/
White sheetofpaper (~o sheetsofS4 or 10”x14=paperfokfed
doub~)
(2)
(3)
(4)
Settinginthe auto exposuremode
Set the machine in the autoexposure mode UsiW the ex-
posures~t key.
Openthe frontpanel.
Set the AE correctionswitchtothe positionN.
JIIL
DNL1 L2
Autoexposure(AE) -ection switch
Make acopymthe normalmodeand CM the copydensity.
Baeb -y dens~ (autoexposure)
00.1 0.2 0.3
UKOG–0089CSZZ
N~*& ~LQht~c~#
A123
KODAK GRAY SCALE
~f
If the copydensityis notwithinthe limits,referto the pr-ure
de~ribed in“[l1]Copydensityadjuatrne~.
(4) Resolution
Makeonecopy in the enlarge mode (x1.4), normal mode (x1.0),
and reclusemodes(xO.8,xO.7orxO.75,xO.W).
CW to see thatresolutioniswithinthe limitsbdow.
IIcenter ofCwv Icornerofcopy 1
. .
Normalmode (1OOYO) 5.0 Iinedmm 4.5 line@mm
Enlargemode(12470) 5.0 Iinedmm 4.5 Iirredmm
Redue mode(800A,750A) 4.0 IineSmm 3.6 Iirre#mm
Reducemode(700A,84Y0) 4.0 Iinedmm 3.6 Iinedmm
Where hahof lineson the testchartcan bseen isthe resolutionof
the c~y.
2–6
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SF-7300
SF-7350
[3] SUPPLIES
Nenre contents Life Item name
Drumunk OPC drumxl 30K SF730DR
Rernovertapexl
Bhde XI
Dw*er (BMk) 30K SF730DV1
.(fl@ 5K SF730DV2
(Blue) oevef~er (400g) xl SG730DV3
(Brown) SG730DV4
“(Gr=n) SF-730DV5
Tonw (Bkk) Toner(2~) xl 5K SF730T1
(fl@ 2.5K SF-730T2
(Blue) Toner(1309)
X1 SF730T3
-(Brow) SF730T4
~(Green) “SF730T5
C*r (R@ Devd~ (4009)X1 —SF-73OK2
deve~r (BIw) Toner(13@) Xl
kit SF-73OK3
Dev*er untixl
(Brow) ~=ex fSG730K4
(Grean) SF-730K5
Heat rol& kti Tdbn r~r (u~) xl 60K SF730HR
Sil.He rdkr (lower)xl
Separator~wl x3
Cbaning rdbrxl
Toner life:For670tend *merit of Mor kfler she.
Dwm, developer, and toner storage period and
conditions
Stor~e period:24 morrhs after hdata of manufadure, provtiing
tit tie sed isnot~ned.
Stor~e titions: 20 to9070RH,—15 to 40 degrees ~tigrade
Storageentironrnent
%RH I
w....
~
20 ----,
0–15°c 40°c
How to readthelotnumber
●D-
000000
123456
1:sen~~
2: Model(“HwforSF-7300f1350)
3: Year
.Devd*er ortoner
000000-0
123456 7
1:B+Toner
w+oevd~er
2,3: Monti
4,5: Day
6: Year
7: LotnUtiW
J
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SF-73M
SF-7350
i[4] EXTERNAL AND INTERNAL STRUCTURES
1. External pans
pOrginal cover
c
P&er switch
D2. Internal parts
Front~~r openbutton
.
rum
Waste
unti
W*te totir ~ntdner \
\
Fuserac~ssi~ lever
4–1 .——-. -—.——
. .....

l-” ‘“--~
SF-7300
SF-7350
3. Opemtion panel
SF-739 COPY RATIO
-———
J——- —-, ~——L—-, IIIII
=
LIGHT DARK
‘am
I.....
@I““
@III II
@@o@@
oAutdmanuderrposure irrdkator -
@Pepersd-tlndkatw
Autdmanud ex~ure switch I@ Magnificationratio.dkator
Ctear key
Toner repknish irrdkator
Marntene~e indkator
Numerickeypad
Manual exposurecontrolknob
Copy numberindkator I@
1
Misf* indbator o
@]Ready indkator
Repla= devekrperindkator @
Zerdreodl key @
Copyrati seht key @
@Iwaste tonerr~lam indkator @
@IPrintswitch
@Paper sd=t key
(validon~ whenoptional
muM-bypassstackerisu-
Q~waste toner full indkator will flash when the waste toner
containeris notinetdkd orthe shutterisnotcksed.
ARercompletionofcopyi~, the copierwillreturnto the normalre-
nditionin 90 s-ends.
Normal condition:auto exposuremode, normalcopy mode (100Y~),
copynumberdisplayO
4–2
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SF-7300
SF-735O
4. Switches, sensors, detmtors, and solenoids
Forsensorsand detectors(PID, PPD. PSD, POD, MORS, LPS) are
‘T~Tsto(RA w.vo~
dynamicdfy drfven (pulse input), the low Ievd sgnal will bas
shownbdow.
1. HIevd
LbVd
Vc VD
Pulsesignal
Thermosdt wMector
(TS)
Abbreviation Name Tvoe Function Contacffoubut !
., #
PID Paper In Detector Photoswitch Manual feed ~per detector Lowwhen paper is on.
PPD Paper Pass Detector Photoawitch Paperfeed bfockpaperpeth Hgh whenpaper ison.
detector
PSD Paper SeparationDetector Photoswitch Paper separationdetector Lowwhenpaperbon.
POD Paper Out Detector Photoswitch Fuserbfockpaperdetector Lowwhenpaperison.
MHPS MirrorHome PositionSensor Transmittivetype Mirrorbase homeposition Hgh when on the home
photosensor sensor position.
MORS MirrorOverRunSensor Trarrsmitivetype Mirrorbase overrunsensor Highwhenoverrun.
photosensor
LPS(*) Lens Positfm Sensor Transm~e ~Lenspositionsensor Lowwhenatimingsltiis
photosensor sensed.
AES Auto-sure Sefior Photodiode Dwument contrastsensor Lowsignalo- when
documentcontrastish~h and
hgh outputwhendocument
contrastislow.
AECSW AE correction Switch Slidestich Atiornaticespoeurecontrol D: Lowcopylampv-e
switch U: Highcopyk- voltage
TCS Toner ConcentrationSensor Magneticsensor Toner corr=ntrationsensor Highwhentoner
-. —. .concentrationis low.
TFD Toner containerFullDetector Transmittivetype . . Fullwaste tonerbottk sensor Hbh whenwastetonerisfull.
photosensor ‘-“
CD Cassette Detector Puehswitch Cassettepresencesensor ON whenacassetteisin.
Csw CabinetSWitch IntA=k switch Frontcabinetpositionsensor ON wfrenckd.
MSW Main SWitch Seesaw swkch Powerswitch ON when CbSd.
Thermistor Thermistor Thermistor Fuserbkck temperature Highresistancewhen
(Rth) detection temperatureis low(hgh
VRth).
Thermostat Thermostat Thermostat Fuserblockhightemperature Contactbreakswhenahigh
(TS) detection temperatureis sensed.
CPFS Cassette Paper Feed Soknoid Sofenoid Papertakeup rdkr control Takeup rollerstartsoperating
soknoid *n ON.
RRS Redst RoflerSolenoti solenoid Resistrollercontrolsoknoid Resistrdfer startsoperating
whenON.
L
PID and PPD are avail~le as a pair underthe partsname of PPID. &
PID
6P PPD
4–3

SF-7300
SF-7350
5. Wgnetlc clutch and motom
mrevietiorr Name TyP Function
MFC MirrorFeed Clutch Magneticclutch Mirrorbase feed clutch.ON todrivethe mirrorbase,
MRC MirrorReturnClutch Magneticclutch Mirrorbase returnclutch.ON to returnthe mirrorbase.
MM MarnMotor InductionAC motor Dmm, mirrorbase, and rdkrs dtiing motor
CFM CootiW Fan Motor InductionAC motor Cooliq f~ dtie motor
TM Toner Motor Synchronow motor Toner SWPWmotw
LM (“) LerrsMotor Ste~i~ motor Lens drivingmotor(SF-7350 only)
6. PWB :
DL
Name
Main PWB =
HV. T. PWB (assy)
CD PWB
OperationPWB
BL Pm
CLC PWB
DL PWB
DC SU~~ PWB
AES PWB
H..T.PW~(assy) /AES PWB ~
PWB
7-. A-, .,-
Description
The nudsus ofthedeotroniccontrolsystemwhioh=trob circuitsand
loads.Asinglechipmicrwmputer w& intmal ROM and RAMchips
is usedforthe maincontroller.
Conaistsofhighvoftagetransformercircuits,trarrsfomr drivecircuits,
and corrtrdcircuks.
If MC orTC biaso~ut koutof limits,adjustmentis r~uired usingthe
outputadjustingpotprovidedon the bead.
Consistsofcassettesizedetect switchesand apaperfeed sgnd
interfacecircuit.
Consistsof adisplaycircuitand ke~oa~ sense circuit.
Usedto optical~dischargethedrum.
Usedto controfcopylampintensity.Asthe ME, AE adjustingpotsand
automaticexposurecontrolswfichare locatedonthe board,l.ght
intensitycanbe adjusted.
Usedto optical~dischargerestiual chargeon thedmm.
Used to createWsupp~ by rectifyingthe sourcepower.
Used to sensecontra< ofadocument.
4-4
SF73@ interchangeVS.SF-73OO
NothterchangeaMe.
Notinterchangea~e.
Notinterchangeable.
Interchangeable.
Interchanges@.
Interchangeebk.
Irrtarchangesbb.
.——.. ...
’
,., . ..

‘-
SF-7300
SF-7350
[5] DESCRIPTION OF EACH BLOCK
Deew@bn ofeach b= isgivenbdow.
(1) Peperfeed M-k
)(2) Separatftia~ blak
(3) Fu~paperdeiwerybt~ ~
D
Machine overall view
@
1——
(1) Paper feed block
Twmways are provided for feeding paper; ~asette feed and
manualfeed.
A250-sheet universalcaasette kInstid in the machine through
the &war part &tie front-biwt.
Manual feed can be usedto bed aSpeornlpaper orto make acopy
ontroth-a ofhpaper.
)ItbS&Opossibfeto use amu~ypaee sta~er. (Optbna~
Cassettepaper ske range:
Paper stie: MtoAS(10° x14”to 8-11~ x511~
I
w
i- J/
I/I&
i~J
I
+@
I
—1
@~ I
ho
P*a Iwatkn ofpaperfeed M-k
PPD (Paperpassdettior) PID (Paperindetdor)
OPC drum
Manualfeed tabb
RRS
Paperweight:46 to 66Kg (56g to ~~. meter)
Paperske:BtoA6 (10=x14nto%Ilr x51~
Paper weigk 45 to 1IOKg (52g to l~q. meter), ~the
paper exceeding 90Kg (lO~W. meter) must be smdbr than
A4 (8-11%X 1l-11~.
Kindsof ~ti papers (manualfeed on~):
Seed stie: 45 to 60Kg (52 to 70@q. meter)
Overhead pro@tor film:60 to 1IOKg(70 to l~K@q. meter)
Label and =d: 60 to 1IOKg (70 to l~q. meter)
Cassettefeedproce~ flow
I
I
4
1,~
CPFS ON
w
rI
I
CPU 1
6I
*4
I
;
v
(PPD failedtoturnON) I
StatusPdi~laved *
Marnmotorstarts
Paperfeed rolferestart
CPF c~ch springdb~ages
Take~ rollersrotate
Paperen~ deteded
Resbt rolkrs rotate
I
.
5–1 Papertaken ontothe transportM+
----- -..--..— .-..—....—.—------- .

SF-7300
SF-7350
Manualfeedproass flow
I
I
v4
CPU
1“~ +
RRS ON
(PPD failedtoturnON) :
Main motorsta~
Paperfeed rolfersstart
Papere* &teed
Resistroifersrotate
I
Stati Pdisplayed vPapertaken Mto tb transportM*
(2) Separation/transport block
Paper fad intothe machine is transportedto the transfer Mwk. An
area of about 7mm on the rear frame side passes under the
rmover tape and does not make mntact tih hdrum, whkh
causes avoidarea on the copy.
Afterthe image is transferred,the portbn underthe removerwe is
he~ between the separationrdk Aand the tensionrolkr and the
paper is separatedfromthe drum.The paper hthen transpofiadto
the fusingblink by means of the saparatkn relterB.
Y
Upperheat roller OPC drumY
Separationtape
Tensionrdlar
(3)
S@aratiti rollerBps~ Separati& rollerA\
Tranafermona unit
(PSD failedtotum on) +
Misfeedindbtsd P- movesto the fussrb~.
Fusing/paper delive~ block
The toned image, transferredto the paper, is fused uei~ heat and
pressure. Staticonthe paperis removedby means of the disch~e
brushwhenthe copybde~ered intotb r~siti~ tray.
Upper heat rdkr ~effon @a@ Thermostat
I
p- ddNarY rOlla
\\HatY’mp/ .he~~tor
e
WP”e”’t””
Cleani& roller
5–2
T;
(POD fai~ toturnON) i
Misfti indtit~ Papere~sd ontothe raoeivingtray
ThermistorHeat rdfar surfa=
Temperaturecontrol temperaturedetedad
CPU
1
I
v
Upperheat rdbr sudace
te~erature monitored.
Heat ronerheatedby the
haaterlamp (the heater
lampturnsonwhen
the heatersudaw
temperatureisbdow
1S0degrees centigrade).
Contadopen(9)
olrragubr& h~h temperature(H3)
oIrreguhrfylowtemperature(W)
oopen thermistor(H2)
(-) When the therrnoetatiaopen,the resetbuftonon thetop ofthc
thermostat must be pushed down to reset, as it is not ad
r%etti~.

I
G,* .-,- .
(4) Optical blink .
●The ytfcsl Mock consistsofafixedfocus kne and six mirrors.
Because atied focus hs ia used, the No.4 and 5mirrorsare
)
movd accordf~ to the ms~ifiiation ratio, to ch~ the dis-
tance be~een the documentand tie drum (OID: OriginalImage ●
Distance).
Asteppingmotoris emptoyedto move the kne and mirrorloca-
tionsto four steps of magnificetin. The SF-~00 does not incor-
poratethe msgniffcationfeature.
Mirrorb~ drivevvire
No.2 mirror
\
SF-73W
SF-7350
Exposureis contrded by v@~ the copytip wkage. The AE
senew is intie copy hmp unkto sensedocumentcontrast.L@ht
reffected from the document ia received by the AE sensor to
determineexposure.
sri exposurec~trol methodis used fw the mov~ riht source
(stationaryplaten).
Therrn4 fuse NO.4 mirror
No.1 mirror R~ector Copy lamp /Tsbk glass /
~F-d movement
..— ..—
..— .— -.
—.—..
No.5 mirrw
)(SF-7350 topview)
Dia~arge lamp ~
clutchspeed *ift*a
Clutd unit IClut& connection~ar
MFC (e /
MRC MORS
MHPS
II
Sqing motor
\
_re ~ntrd Pk~
\Lensdrivetire I
/ \, yI1— /!
No.45 mirror
,beae drive-m
I
I
\
No.~3 mirrorbase unit I
Copylampunit No.W5mirrorbase unit
AE sensorslit

I
SF-7300
SF-735O
(SF-7300 top view)
MH,PS Exposurecorrtrdphte
/MORS
II /
Iu
No.~ mirror~ase unit AE senior slit \
Copylamp unit /
No.u5 mirrorbase unfi
A. Name and function of each component the k~mirror drfie motor.
(1) Documenttebk (10) ●Mirrorhome~tiase~~(MHpS)
Atremmitffvetype photoeeneoris used to dated the posi-
tionof the copykmp unithomeposition.
●Mirroroverrunsensor(MORS)
Atremmittive type photoeeneoris used to deteotthe posi-
tbn ofthe c~y tip unitovernmposition.
(11) No.~ mirrorbaee unit
This unitmwee to *an the dmunrerrtimage.
(12) copy lamp unit
Consists of the No.1 mirror,thermal fuse, AE sensor, copy
lamp, exposure oontrd pfatea, and retior, and moves to
acarrthedoometi image.
(13) Themdfuee
Atta&ed to the reffedor and funotionato shut off the copy
lamp powerwhen an irregubr optkd systemtemperature
isencountered.
100V:(119.C, 10A)
200V:(119*C, 10A)
(14) Reflector
Used to refl~ the copylamplightonthe&ument.
(15) E~urecontrolpktes
Four plates are attachedto the oopylamp unitto adjustex-
posurebalance betweenfrontand rearframesties.
(16) Mirrorbase dtie wire
Used todrive the copylampunitend No.z3 mirrorbase
(17) Steppingmotor (SF-735Oonly)
Used to dfie the No.45 mirrorbase and the clutch ~eed
shiftgear.
(18) AE sensor
The &ument table is stationa~ and the originalis aligned
to the frontmrmr ofthe dmument guide.
Copy lamp
100V Ace: 80V, 250W
(2)
200V SWbe: i@V, 250w
Vdtege to the copy lamp is controlledby the CLC circuitto
produa stabk exposureaccordfngto d~ument mntraet.
(3)
(4)
(5)
Lem
iFbredf-s lens
Lem poeitbn sensor(LPS)(SF-7S50 on~)
Outputsignalfrom this se- bused for the basic dgnd to
determinethe copymagrdfbaffonratio.
Lem carriage(SF7350 only)
The lens and LPS are mountedon thisbase wfri~ is driven
by the kndmirror drive motor to move towards the p~er
entry dde when in the reductionmode or towardsthe p-
exit sidewhen in the ank~ment mode.
(6) Lem guiderail(SF-73~ only)
The kns carriage traveb over the bns guide rail to control
the kne optbal *k inthe magnifkationmode.
Lem drivewire (SF-735Oonly)
(m
(8)
(9)
Contied to the Iendmirrordrivewire to controlthe No.4/5
mirrorand chch speed shiftgear.
No.415mirrorbase unit
The No.4 ad 5mirrorsare mountedon this unit and shift
positionby means ofthe Ietimirror drivemotorto matchthe
originalimagedietame. (SF-7350 only)
No.4/5 mirrorbase drive=m (SF-7350 only)
Used to shiftthe positionof the No.w5 mirrmbase drivenby The photodide kusedto detect contrastofthe documentby
5-4
‘.. --- —...-.—..—- ..
..” ..”’ ..... ..

I
SF-73OO
SF-7X0
I
*
(19)
the Intensitvof the Ikht reflected from the or~lnel surface.
The sensor-wtiing a~eais (100)mm widefromthe front.
Bla& lamp
Consistsof side lamps (SL1, 2) and v+ lamp installedon
the drum unti.In the reductionmode, Ight from the side lamp
is projected over the nomimage area of the drum to dis-
chargethe area so thattoner is notappliedto the non-image
area. The void lamp Ibht is appliedto the tape contactarea
to preventdeposi~ of toner.
Onlythe VW lamp is usedforthe SF-7300.
Void lamp acWation (figurewithinparenthesisis forthe inch
series).
IMagntiicatim ratio SL1 Su
Xo.so(XO.75) ON OFF
I.
XO.70(XO.S4) ON ON I
Void kmp dischargedarea
SL2
SL1
Side hmp (SL2) dbcharged area ~Side famp(SL1)
dischargedarea
(Frontframe side)
B. Magnification operation (SF-7350 only)
When the magnificationratio is chosen,the steppingmotorrotates
to shiftthe positionof the lens, mirrors(No.4, No.5), and rotatethe
clutchconnectbngear.
When the slitass~ned to the gtien rnegniffcatfmratiois sensedby
the kns positionsensor (LPS), the steppingmotorst~s. Wth this,
the fens,minors (No.4, No.5), and the clutchspeed shiftgear stop
at theircorrectbcations.
(Silt posklon vs. magnlflatlon ratio)
Inchseries
AB MhS --–---== ---
-,
i1
x1.25 x1.0, I
xO. 8Xo. ;5 Xo.7Jo. 64
Iu uuuu U1
\J
Stitpkte
(Lens and mirror moving range)
Enlmdnorrnd II
(Clutch speed shift gear poshion)
X.o.7k1.0
xo. 64 xl. o
(Selection of speed shift gear)
When the protrusionin the clutch speed shiftwar pushes up the
gear, the &ro@ate gearsengage.
D
shiftgear
1s
*
Protrusion
cluta speedshiftgear
5-5

SF-73OO
SF-7350
.
.
(5) Image process block
●TheSF-7300/SF-7350usean Organic Photo Conductor(OPC)
drum.
OPC layer[4.:; , , .; ,—CTL
. .. .. . . . . ...... . ..
... ,. . :.: —CGL
gh{sy/////;~
/,/’ / , ‘/;’ ~
/,/ ,,
/. _Aluminium
layer
CTL (ChargeTranspoRLayer) of 21 mkrons
CGL (ChargeGenerator Layer) of 0.2 to 0.3 microns
A. The basic copy prmess
Operationaltheory
Acharge bappfied over the OPC drum surfa~ from the main
corma un~ The im~e exposedby the -y hmp &prqected over
the drum. The cha~ on the drum sutiaa &a~ipeted in afl area
except,{orthe characterareas ofthe origin~, toformaktent image
on the drum Sutiati. Toner battrati to the charge on the ~m
surfaoeand avie~e image is nowformedon thedrum.
step1.
step 2.
step3.
step 4.
step 5.
step 6.
step 7.
Step 8.
step 9.
Charge ~rensfer coronaunit)
AuniformnegaWe charge is ~iied overthe OPC drum
surfaceby transfersoronaunk
Cbaning
The reeidud toner kft on the drum surface aftertransfer
is removedby the ckaner unit.
Opticaldis&arge
Restiual charge on the dmm sutia~ is remov~ by the
discha~ hmp.
After Step 1(charge), Step 2(deening) and Step 3(dis-
charge), tie drum suda~ potentialb~mes stsbb and
isreadyforoperation.
Charge (Main -one unit)
Auniformnegative chage is ap@iedover the dmm sur-
face bythe main coronaunit.
tiposure
An e~r=te~ latentimage is formedover the drumsur-
face.
Devdopi~
The et~ostatic htent image is convertedinto avieibk
imageby the toner.
Transfer~renefer -one unit)
The vieibk image on the drumsurfaceistransferredonto
the copypaper.
Ckaning
Toner remaining on the drum is ~llected by the ckmer
bkde.
Opticaldbcharge
Residual cha~e on the drum surface is removedby the
dischargelamp.
B.Copy steps
o:Stepnumber No.6 mirror
r
I* lamp
0!0
Step 1: Charge (Tranafer corona unit)
Prforto go~ intohcopy cycte,auniformnegative &arge is ap
plied over the drum aurfaceby the n~ati tisfer corona unk A
~~e charge appearsinthe-atimini& kyer.
r
Aluminium-~
layer
CGL —;.,.,.. . .,;....,. .. ,.,..:,.,.., ,.:
cn —
OPC drum
,“ ---. ‘.
,,8”? -?. “,
/.
,;,:9?;...;’..‘“
1
●
~Trensfer -ma unt
Step 2: Cleanlng
Surfaceofthe drumiscfeanedby the ~ning Made.
Step 3: Di~harge
L~ht fromthe ~harge hmp kpq.eoted ontothedrumsudace.
Poeitfie and neg~e ~~ee appear in the CGL of the drum.The
negatfvecharge intie CGL movestowd tie positivechargeinthe
aluminiumlayer. Meenwhik, the positfvechargemoves tward the
nega~e charge on the drumsudace createdat Step 1. The dmm’s
surface charge breduced to avary low potential(almost Ovds)
because &the n~fi~tin Meet thatoccursbetw~ tie positive
and ~atie draws on ~the dms sufice end ahminum
core.
5-6