Sharp Z-50 Service Manual

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Page 1

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SHARP SERVICEMANUAL

CODE :O0ZZ50SM/ //–E

MODEL Z-SO

[2] Operation panel and

[3] Unpacking and insta I o

[4] Supplies. . . . . . . . . . . . . . . . . .

w. .1

[51 comPonent location . . . . . . . . . . . .

[61COPYprocess. .. . . . . . . . . . . . . . . . . . . . !

[7] Paperfeed and transport section . . . . . . . . . . . . . . .

[81 Optical system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .: .?.

[9] Fusersection

+~i

. . ... . . . . . . . . . . . . . . . . . . . . . . . . . . . ........ .. .

[10] Others . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . !

[11]

[12]

<35

Electrical section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Circuit diagramandtime chart

,...,.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

37 4

[13] Actual wiring chart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

SHARP CORPORATION

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[1] BASIC SPECIFICATIONS

Type:

Desktop

Copying system:

Dry-type electrostatic plain pmer copier

Kinds of originals:

Sheets, book Thickness: 30 mm (1 .18 inch) maximum with the

original cover in use.

Weight:

1.8 kg (4 Ibs) maximum

Original size:

A4 maximum

Copy size:

(Cassette feed)

A4, B5, A5 (56 to 80 g/m2 )

or 8% x 5%” to 8% x 11” (14.9 lbsto 21.3 Ibs)

(Manual feed)

A4 to A6, postcard, businesscard (52 to 1309/m2 )

or 8Y2

x 11” to8Y2x 5%” (13.8 lbsto 34.5 Ibs)

COPYspeed:

8 copies/minute (all sizes)

First COPY:

11 seconds (time required until the copy paper is delivered to the exit tray after depression of the PRINT

switch for A4 or letter size paper.)

Warmup time:

20 seconds at rated voltage, room temperature at 20 to 25°C (68° to 77°F), 65%RH.

Multicopying:

1 to 19 copies, countdown type, with auto repeat

Magnification ratio:

1 : 1*1%

Exposure system:

Slit exposure by moving table.

Paper feed system:

Cassette and manual feeds

Developing system:

Magnetic brush development (2-component developer)

Fusing system:

Heat roller type

Light source:

Halogen lamp (1OOV series 200W, 200V series 215W)

Power requirements:

Local supPly voltage +10%.

Power consumption:

1.15 kW maximum, 50 wh standby (power down mode)

Physical dimensions:

411 (W) x 41O(D) x 209(H) mm

16.44(W)

x 16.4(D) x 8.36(H) inch.

Weight:

16 kg (35.2 Ibs)

Display Functions:

PRINT:

The green lamp turns ON when the copier is ready for copying, turns OFF during the warmup time, and flashes when in the power down mode.

MU LTICOPY: Multicopy number dispiayed on LED,

normally O.

MISFEED:

The red lamp flashes when the paper is

misfed.

—

TONER:

Flasheswhen the toner box is empty.

DRUM:

ON after 8,000 copies. Starts to flash after 9,000 copies and the machine stops.

Accessories:

Semi-universal cassette x 1

Instruction manual X 1 Power supply cord x 1

Options:

Drum urtridge TD cartridge (black, red, blue, brown) ~~~ Machine stand (ZT-50D)

The term “TD cartridge”

means the “Toner Developer

cartridge”.

l–

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[2] OPERATION PANEL AND INDICATOR

FUNCTIONAL DESCRIPTION

I 1

Power switch and power ~upply cord Power is turned on and off using the power lever. Upper frame release button Used to release the frame lock when a misfeed occurs or the drum cartridge has to be replaced. Doorswitch

Used to check the front door position.

If the front cover is opened, the misfeed and multicopy

indicator wi II be reset. Auto exposure control Selects appropriate exposure rate depending on the contrast and background color of the original. Exposure control lever It has three set positions. For most originals, set at the center position.

To make the copy darker, move to DARK. To make the copy lighter, move to LIGHT. Misfeed indicator

When a misfeed occurrs, this lamp turns ON. .

TD cartridge replacement indicator The lamp flashes when the TD cartridge needs replacement.

Drum cartridge replacement indicator

Afier 8,000 copies, the indicator will start to flash.

An additional 1,000 copies can be made. At this time the indicator will stop flashing and stay ON. No

additional copies can be made until the Drum canridge

is replaced. Multicopy Copy numbers between 1 and 19 mn be entered

using the (–) or (+) key. Depression of the (–) key while “O” is displayed brings “19” into the display,

and continued depression of the key reduces the number. When the (+) is depressed after “19”, the

number is returned to, ::0”. Every time a copy is produced in the multicopy mode, the number in the display coun~ down. When the (–) isdepressed in the middle of multicopy operation, the number of copies already made is displayed.

Auto repeat ,j,.,, ~<.<.., ,,,,

(

Upon completion of copying in the multicopy mode, the copy number previously set returns to the copy

numberset.display.Use of the CLEAR key resets the

number. One minute after completion of copying, the number @ the auto repeat functions are automatically cleared.

Paper feed alarm (P indication) If a sh~t of paper is not transferred to the paper

stop.

par after depre~ion of the PRINT switch, or the cassette is

empty,“P” is “displayed in the copy number

wind~~.

:If the COPY. NUMBER key or the CLEAR

key is depressed or the MANUAL FEED switch is

Wb:’ti ‘~~ief”ti b~ned, the “P” indication is also cancalled.

@ Clear

!~,+:

[

Multimpy and auto repeat modes are cleared with the

‘) ‘ CLEAR

key.~~ne rnlnuti after completion of copy

. - ..-

‘;’:? fifi@;ati6nJ~&~~Qt n~rnbar and the repeat functions

are automatically *-tid.” i‘ “

@ PRINTswitch

~,; ~~ ~ saconds:aftar-powar isturned on, the READY lamp

turns ON indicating ”-tit” the copier is ready for cOPying. if left unoparatad for go ~conds, the

copier$tha ~ into the power save mode and the {

READY lamp changes from ON to flashing. When the PRINT switch is pressed while the READY lamp is on, the machine immediately starts to copy. When the PRINT ~itch is pressed while the READY lamp is fkshin~ thepower~va mode is cancalled, the original table rn&’’”to:’~+@py -~fi position, and it starts the

armup cycle. is dependent it will be less

the PRINT

–2–

....----

‘... . ..

;. ..

.. ~....

...

,’ ,.

.,..,.,

. . ,.- -. --.”.

. :......,..,*..-,.K,:

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[31 UNPACKING AND INSTALLATION

1. Unpacking

(1)

Open the carton in the following sequence.

@ Cut the tape around the top of the package and

open the flaps.

@ Remove the accesso~ container top padding and take

out accessories.

@ Remove the upper packing cushion and take out the

reachinc.

Dustcover,instructionmanual, andotherprintedmaterials

Itainer

)

, .

, ,

~ Cassette

-upper paCkin9

CUShiOn

, Lowerpackingcushion

–3–

..- .

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2. Installation

Installation requirements: Please note the following requirements when installing the copier.

Machine Environment Avoid installation in direct sunlight or bright locations near a window.

Direct sunlight may cause the plastic components and

the original cover to deform. Frosted glass may also

produce the same effect.

.=—-.

‘r

s..!

‘-’ ‘:%2

‘. —.

,, —- .—

11---

Avoid installation in a hot, damp place or where

rapid changes in humidity occur (for example; near an air conditioner). This may cause paper to dampen or moisture inside the copier, and may lead to a misfeed and deterioration in copy quality.

Avoid installation in a place where the ventilation or air circulation is poor. Never install the copier near inflammable materials or

in the presence of ammonia fumes. Installation near a diazo copy machine may lead to a

deterioration of copy quality or a machine malfunc-

tion.

Install the copier near the wall outlet.

(2) Space around the copier The copier requires at least IOcm of clearance between the rear side and the wall. This space is required for proper cooling fan ventilation. Adequate working space around the

machine should also be allowed for ease of operation.

.....

/.. ,:.

.-.

:.4*$-,:,

The recommended environmental conditions are: ,

;,.~i, -

20 to 25 degrees C (68 to 77 degrees F.), 65%*5%RH:. ~ : The nominal environment conditions are: ‘ ‘.”>:;~~. -} “. ~~.,:.’”. .,

10 to 30 degrees C. (40 to 86 degrees F.), Ot~85%RH..~=~~ “’+S.:.- -

. .

If the copier is to be installed in an area~of<higher<,~>..<:,~:

temperature the humidity must be lower: Example;,.’ .,,<;’; .”

If the temperature, is 35 degrees C. (95 de;&~F\4$’’w:;. ‘‘~ the humidity should be 65%.

, \..’” .

~~““’’>”< ‘“>1 I ‘: -

Avoid installation in a place where dust or.<b~>~<~

,,. ,“

ooeratingran9e

encountered.

~~;”~~~~i~ur~ “

Dust deposit inside of the copier may lead to

ade <

ioration of copy quality or machine trouble.

‘T

1 me power SUPPIY line should have a capacity of more

than 15A, capable of supplying more than 90% of the

-..

/ .-\

-..

~.. ‘ “:” . ‘-”’’” .. ,,~ ~ @ ‘::e:::’tageatfu” ‘oad.

use an extension cord, or operate any other

—

—.

—

-—

aq~ipment from the same wall outlet.

z-m ~

~ p

install the machine on a level surface.

.\/

... .. “

The toner density and copy quality may be affected

. .-

unlessthe machine is installed in a level condition.

Do not install the copier on an unstable or uneven surface. The copier must be placed on a level surface to

(4) Ground connection

@ Use a properly grounded (three prong) wall outlet

permit proper functioning.

only.

–4–

.- ...-,.-..—

Page 6

3. Installation procedure @

Remove the poly bag and tapeings that secure the

original table and the exit tray. Remove the desiccant.

● Desiccant is used in the USA and Canada only.

Tapeing

z-so

Desiccant is used to protect the drum

from moisture

absorption, it should discarded upon unpacking.

@ Open the front cover.

Push the front cover open buttons located at both sides

of the copier.

open buttons

~ Install the drum cartridge (Except USA, Canada)

a. Open the front cover. b. Open the upper frame. c. Remove the cover from a new drum cartridge. d. Push in the drum cartridge all the way, then close

the upper frame.

Protective cover

-——

ODOD!D

Never expose the drum to direct sunlight or touch the drum surface with your fingers.

Open the box containing the TD cartridge. Remove the TD cartridge from the bag and shake horizontally four or five times.

,~,

\,&j

;--~

Remove the cover from the TD cartridge. Save the TD cartridge cover. It should be used to seal the TD cartridge if the copier must be shipped for servicing or in case you move.

Cover

Slide the TD cartridge in until it locks in place.

Close the front cover.

Remove the paper cassette from the bag.

Fan the copy paper and insert it into the cassette. (Maximum: 100 sheets)

f 5

—

5–

----

,-. .,,

Page 7

a. Push the pressure plate unti I it locks in position.

r 1

Pressu;eplate

b. Adjust the paper guides in the cassette to the COPY

paper width and length.

;OPVpaper ength

paper width

c. Fan the copy paper and insert it into the cassette.

Make sure the edges go under the corner hooKs.

Swing the exit tray down.

Plug the power cord into the copier and then into the nearest outlet.

Turn the power on.

After machine installation or TD cartridge replacement, the ready lamp may require a longer period (No

minutes or less) before it turns ON.

~~ -

-’.

ihe~~c plug that

P. :: --

comas with the

& -.. ,

*F2:T:..:. ..

Prduct matches ymr

wall outlet.

..-—..-..-.-—-.

4. How to mke a copy

Opentheoriginal qver.

@ Place tie orig~~~i”’the

upper right corner, and close

the

originalcwer..

@ Selectthe

nurnhr of copies desired.

● If a mi~ake is made, press the key to clear the entry

or hold the copy quantity key down. The maximum ‘number’’of-&-pi& is ,9. .,.,

. “O” will make

a singlecoPY.

,..~,..- . :

@ Toam~e~~&oli9ht or dark originals.

NO**~y~ttO*e cenmr position.

. . *t

&,.DARK +:*km.~e COPY.

. Set to

L1’GHTtoli@*n~~e coPY.

@ ~=Wfi~keY when the green light indicates that

-@&&--

‘---@ Joidarea

—————

—-—...

~ (approx.(gmm), 3/8”)

–6–

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[4] SUPPLIES

1. Drum ~~idm, TD ~Wid~

TD cartridge

. .

L . . .

● Life

Storage conditions

Description

Product name

Approx. (temperature and humidity)

Drum canridge x 1

8,000

Instructions x 1

~-50DR

copies

t“ ----

TD cartridge

For USA

ExceptUSA

x 1, (including

Blink ZT-50TD1

ZT-500Cl

devdoper and

ZT-50TD2

ZT-50D

toner)

JIye ZT-50TD3

ZT-50

Brown

ZT-50TD4

ZT-50DC4

DE$ % .U

–St

4or

.x 3,W0 ~pias for black (2,700 mpies for color) for

● These are estimates only, life will vary depending on

A4 or letter size with 5% toned area.

actual usaaga.

NOTE: How to identify the lot

number

(TD ~rtridge)

xl.

Developer kind

Serial number

Last digit of production year 6–1986

‘\

Production month (1, 2,3, ....0, X, Y)

Black developer (JAPAN)

5. Blue developer Black developer (EXPORT) 6. Brown developer Red developer

O. No classification

Lot number

MG roller

(Drum =~ridge)

%me as TD urtridge.

A rtnumber

L-

Rear frame side of the drum cartridge

–7 –

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z–s

2. Replacingthe drum @rtrid@

T“r” power offa”d OPe”thefro”t cover

@ Press down on the catch and pull out the TD cartridge.

Lock lever

TO ~rtrid~

Front cover

@ Move the original table to the left, andpress the uPPer

frame release button to open the copier.

Upperframe ralmw button

@ Grasp the handle of the drum cartridge and pull the

drum cartridge out.

NOTE: Thedrum cartridge cannot beremovedorinwned

unlessthe upper frame is open.

Remove the protective cover from the new drum

cartridge.

Push in the drum cartridge all the way

in, then CIO*

the upper frame.

.;.

“’ . ,

. .:

.: -, ,

-..—

/iy

.x .c...,2 ,r”;t!.,.,.%..

——...._...-—..- .. . . .

T-

....... ...... ... . ....----

—---.-—.—-

--- --

A. A.-

-—

Insert the TD cartridge, then close the front cover. !. ; ‘ ~ .

Turn power on and make sure that the DRUM r-

—..—-

~:=,..

placement lamp is extinguished.

-..--..—-__.:”——.

‘“,

---

.....

.. ...

‘..

.’

%Tt’..a:a:?::..:. .

–“8 –

Page 10

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[51COMpONENT LOCATION

1. External

Operation panel

@ Original cover

Front cover open button (paper entrv side)

@ POWER switch lever

@ Manudfeedgutie

@ Powersupplycord

Qmvinghandk(wperentwtide)

@ colorcheckw~dow

@ Etittray

)

@ Businesscard release lever

2. Open view ?

Drum cartridge

@ Cleaning lever

Upper frame release button

@ Fuser

@ Transfer corona unit

@ Fuser accessinglever

~ Transfer corona cleaner

–9–

Page 11

Z–N

...,—---- .

3. Front frame side

CLR PWB

@ Drum ca~ridge

@ Clea”i”g lever

@ To”er alletiion co”@i”er

TD cartridge

Doorswitch

(interlined for the main switch)

4. Rear frame side

0’(

Table start position sensor [M=)

@ ;~~;~~l~e~j~;~;;;rrun

~ %nsorati”atorarm

High voltaw transformerunit (MTHVG)

@ Powertransformer

Main PWB

@ Powerswitch lever

{

–lo–

—,. -..-,. .—..-.-.--,-,--

--.=

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5. Crosssection

Z–M

Discharge lamp

@ Copy lamp

Main corona

@ SELFOC lens

@ Auto exposure sensor

@ OPC drum

~ TD cartridge @ MG roller

@ Toner concentration” sensor

@ Paper entry sensor (MS 1)

Manualfeedpaparentry sensor

o (MS ~)

@ PaperfeedrollerB

@ Paperfead roller A

@ ps plate

Cassettepaper feed solenoid (PFS)

@ Transfer corona

Q Separation roller

@ Lower heat roller

@ Heater lamp

@ Upper heat roller @ Paper exit sensor (MS 2)

Thermistor/thermal fuse/thermal

breaker

@ Cooling fan (main motor driven)

–11–

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. Switch, sensor,solenoidlo~tions

Name

MS 1 Ms 2 MS 3 MS 4 MS 5 MSW

DVSW

Toner sensor

AE sensor

Thermistor

Thermal breaker

PSF TFS TRS

Type Switch

Switch Switch

Microswitch Microswtich

Switch

Microswitch

Magnetic sensor

Photosensor

,,.

Thermistor

Thermal rasat . .‘ ~

Solenoid

,“‘i ,..;.

. .

e.. ., . ..

Solenoid ‘“’ “~~;:.

. . .;

Solenoid

7. Motor, transformer, lamp locations

Symbol

MTHVG

DL CL HL

Function

Paper entry sensor

Paper exit sensor .:Manual faad paper entry~sansor

Table mafi-~sition.~’~~’~~.---~~~,. ~.. .

.-.—...- --

——.+—. .

. . .

~-+ —-—---- -... ....—

Table home/ovarmn posmion sen~.,~=-=- ~~LŠ---

‘ /’

Power switch-’- ----+1,.=- ,,

Sensesi~llation,of-~e TD’,’~.tigs in tie copier.If the TD cartridge is not

g:~:~:h:.rn,:rga< s .

. m+o~~e ~uss po~r isnot sug~lied to the main

Name

Main motor

Toner motor

Powar transformer

Main and transfer high

voltage units

Discharge lamp

Copy lamp

Heater lamp

Function

..,- .. ,,,. , !

Main drive motor

alsodr.n the cooling fan.

. .. . . .

Tonar supply motor ..

“ ...4, ~.~....

Powartransformer. . .

.,. -- ‘;.

Maincoronaandtiansfarcorona

high voltage supply units

For remml Of ‘-tiual ~ on tha drum surface

if. 2?4,>;

For exposure of original. . :.. For heat roller heating:: ;:G ,

Page 14

[61COPYpROcE~

2. Exposure

1. *sic mpy process

Light from the copy lamp, reflected from the original, is

Copyprocess

projected onto the drum surface through the SELFOC

lens.

1.Charge

The resistance of the OPC layer decreases for the area

A uniform negative charge is applied to the OPC drum

exposed by the light (corresponding to the light area of the

surface by the main corona.

Originaltable

‘ainmrona~$j

NWative

8. Discharge

Prior to charge, light from the discharge lamp is projected over the drum to reduce electrical resistance of the OPC layer and remove any residual charge to evenly neutralize the drum surface.

Discharge lamp

‘o

original). The light neutralizes the negative charge. The dark areas of the original do not reflect the light and an electrostatic latent image is formed on the drum surface.

~~4

Copy lamp-

\ /

Selfoc lens

T ve

Remove any residual

lamp

........... .

7. Cleaning

Residual toner on the drum surface is collected by the cleaning blade.

\ I

- - --

Latent imWe

B. Copy process flow

Main highnltege unit

Main wrens

Di=hane lamp

Wtie toner wlletiion

C. Functional diagram

SWration roller

bwer heat roller

“

1’

–13–

--/

~.,... .....:,-

Page 15

/eloping

?ctrostatic latent image in the drum surface is coninto a visible image by the toner.

TD canri@e

(

MG roller

)

Toner

Dwelopar

4. Trantier

The visible image on the drum sufiace is transferred onto the copy paper by applying a negative charge from the transfer corona to the back of the copy paper.

Paper

\ Transfer corona )

5.¶tion

The paper is separated from the drum by the remover tape

and the separation roller.

~ I \ k. /

T-” .,*

6. Fusing

Through a mmbination of heat and pressure, the image is fused into the copy paper.

Lower heat roller

–14–

Page 16

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imageforming processsteps

Image forming: A charge is applied to the drum surface by the main corona, and the image of the original is exposed by the COPYlamp. The charge in a light image area is dissipated according to the degree of density to form a visible image on the drum surface with toner. Step-1:

Step-2:

Step-3: Step-4:

Step-5:

Step-6:

Step-7:

Optical discharge

Residual charge on the drum surface is removed.

Charge

Latent image is formed on the drum. Exposure Developing Latent image formed on the drum is then developed into a visible image with toner.

Transfer The visible image (toner image) on the drum is

transferred onto the copy paper. Cleaning Residual toner on the drum surface is collected by

the cleaning blade.

Optical discharge Residual charge on the drum surface is remoyed.

3. Description of process

Step-1: Optical discharge (by the discharge lamp) Prior to charge, light from the discharge lamp is projected over the drum to reduce electrical resistance of the OPC layer and remove any residual charge to evenly neutralize

the drum surface. As the electrical resistance is decreased,

the positive charge in the aluminium layer moves to neutralize the negative charge present in the OPC layer.

Dischargelamp

Step-2: Charge A uniform negative charge is applied over the OPC drum surface by the main corona unit.

Step-3: Exposure (copY lamp, SELFOC lens) Light from the coPy lamp, reflected from the original, is projected onto the drum surface through the SELFOC lens. The resistance of the OPC layer decreases for an area exposed by the light (corresponding to the light area of the original). The light neutralizes the negative charge. The dark areas of the original do not reflect the light and an electrostatic latent image isformed on the drum surface.

SELFOC Ians

—

Exposure (COpylamp)

! , , 1

II [1 [11

Drum sutiace charge

aftar the exposure

OPC layer

~Pigment

~la~er

++++++

~ _Aluminium

IaVer

Imaga area

Half-tone Non-image area area

Step-4: Developing (–230V DC bias) The electrostatic latent image in the drum surface is converted into a visible image by the toner. A bias potential of

-230V is applied to the carrier (MG roller) in this two component magnetic brush developing method, and the toner is charged positive through friction with the carrier.

O : Carrier (magnetized particle)

●: Toner (charga positive by friction)

(N) (S) : parmanent

magnet

(provided in three locations)

!,,

.,,

.: -., ,, -- -

... - -—

-—

+++

{

–15–

r... .......... ~-,Lv .

Page 17

z–x

-700’

Image area

–600’

~1/

“1

p charge &Expos”re_DeveloPin9 -Transfer~i~ch~~harge

— Time

~Area

Toner is not attracted to the non<mage areason the drum because of the developing bias. Thus, if thedeveloPin9 bias

were to fail, the residual charge would attract the tonerso

that a background would appear in the non-image areas of the coPy.

Step-5: Transfer The visible image on the drum surface is transferred onto the

COPY paper by applying a ne9ative charge from the

transfer corona to the back of the copy paper. As the transfer effect is 70 to 80%, 20 to 30% of the image

remains on the drum (residual toner) even after the transfer.

Step-6: Cleaning Toner remaining on the drum is collected by the cleaner blade and stored in the toner collecting container.

Cleaner

Residual toner

Step-7: Discharge (same as Step-1)

Step-8: The transferred image is fixed permanently on the copy paper by the action of the fuser unit through a

combination of heat and pressure, the toner is fused into the

COPY paper.

4. Photocondu~or

An OPC drum is used for the photoconductor. (Structure of the OPC drum

layers)

OPC layer

=(1 7 ~i~ron~ thick)

. ... .,.. ... ,.. .

.. .....

............ ......

‘.,.. ......

....

‘“::’ ‘_Pigment Iaver (0.2 to

0.3 microns thick)

_Aluminium drum

Page 18

.. . .......... ,--

z–s

[7] PAPER FEED AND TRANSPORT SECTION

1. Papertransport route and operational description

P.pertr.nspOrtro.*e

paper

Paper feed roller C

~aper fed roller

General Description:

Copy paper is introduced into the copier in one of two ways, from the supply of paper in the cassette or manually through the by-pass. The cassette holds approximately 100 sheets of COPYpaper. The cassette supplied with the copier may be loaded with

either 81/2 x 11” (A4) or 51/2 x 81 /2” (A5) copy paper, The Separator Tabs in the cassette ensure that only one sheet is fed at a time. The copy paper is fed out of the cassette by the Paper Feed Roller A. These roller make one rotation for each sheet of paper. The rotation of the feed rollers is controlled by the

Paper Feed Clutch (a Sprjng Clutch) and Paper Feed

Solenoid. When the Print Button is depressed, the Main

PWB energizes the Paper Feed Solenoid (pFS). When the solenoid arm retracts, it releases the spring clutch and allows the Paper Feed Roller A to make one(l) rotation. The rotating Paper Feed Rollers pick up the top sheet of copy paper and start the paper moving into the copier. The

COPY paper is transported to paper feed roller B and

trips the paper entry sensor MS1. Paper feed roller B con.

tinues to rotate until the lead edge of the copy paper contacts the paper stopper plate. The PSsensor block (located on the original table) lifts the paper stopper plate and allows the coPy paper to continue through the paper guide to paper feed roller C. The copy paper passesbetween the transfer corona and the drum and the image is transferred to the copy paper. The

remover tape strips the COPY paper

from the drum and the separation roller transports it to the fuser rollers. The fuser rollers transport the copy paper, tripping the exit sensor MS-2, to the exit tray.

During manual feed the inserted paper actuates the manual

feed paper entry sensor MS-3 and the main motor turns ON. The paper is then transported by paper feed roller B until the lead edge contacts the PS plate. The rest of the paper transport operation is the same asdescribed for the cassette feed. There is no need to push the print switch during the

manual feed operation.

paper feed roller A

feed

trav

The following discussesthe cassette feed and manual feed operations. A. Operation during cassette feed

@ The illustration below

shows the relationship be~een

paper feed roller A, paper feed clutch sleeve, and the paper feed latch locations when the copier is at an

initial state before the PRINT switch is pressed and after the READY lamp is ON.

(The paper feed latch is in contact with the clutch

sleeve protrusion. )

paperfeadlatc~ apaPerfe@ rollerA

Paper

Paper feed frame

Paper feed gear

\ f

\II / ClutchsPrin~

II IIB-@ I /

*$;’P

Paper feed roller A

Clutch sleeve

protrusion

Spring-clutch

(

–17–

,:.,.-

Page 19

.-..IL

)

,-,

At the moment the PRINT switch is pressed,the drive motor starts to turn the drive gears. The paper feed

gear also starts to be driven, but the rotation of the

gear is not conveyed to the paper feed roller shaft and the paper feed roller does not rotate becausethe paper feed latch is holding the clutch sleeve protrusion.

~ Rotating section

Paper feed frame

Paper feed gear

9 r feed

Paper feed roller-A

Clutch sleeve protrusion

Spring clutch

0.9 seconds after the start of the main motor, the paper feed solenoid (PFS) actuates momentarily so

that the paper feed latch disengages from the clutch

sleeve protrusion. Now, the rotation of the paper feed gear is conveyed to the paper feed roller shaft so that paper feed roller A starts rotating to feed the

paper.

Paper feed roller A

Paper feed frame

n Rotating

Paper feed gear

section

\ / Clutch sprin9

@ Meanwhile, the paper fed into the machine is trans-

ported to paper feed roller B and the paper entry sensor (MS1 ). There, the paper is held temporarily by

means of the PS plate, in order to synchronize with the lead edW of the image on the drum. Since paper feed

roller B is continues to rotate, the paper will be evenly

pressed against the PS plate to correct for any paper

feed skew.

Tension roller

PS plate

m Paper

\ ., #

Paper feed roller A ..”

Spring clutch

~=rfed

@ As the original table starts to move, the PS plate is

mechanically raised to allow the paper to continue to

the transfer area.

PS plate release mechanism

original lead edge

Original table

PS sensor arm

\ -/ /

SELFOC lens

,. —-.—.

Lead edge of the ima9e

! PS senwr block

PSjoint plate

Drum

Lead edge of paper ,/

After the PS plate has been released, the paper is transferred to the transfer unit via paper feed roller

C. The paper is separated from the drum by the remover tape and the separation roller.

Paper

Tension rollef

Drum

)

Remover tape

Separation roller

Transfer corona

@ AfierpaperfeedrollerAmakesonefullturn,

the clutch sleeve protrusion is again caught by the paper feed latch so that paper feed roller A stops rotating.

–la–

Page 20

The paper separated from the drum is transported to the exit tray through the fuser paper guide, fuser heat

roller, and the paper exit sensor (MS2) The following shows the timing chart for the above operation.

PRINT switch

(Psw)

depression

Main motor

(MMR)

, ‘ ~

rotation

“ina’tab’a~ “’ina’tab’e

‘:’’;:’)=’’’’”e

B.Operation during manual feed

@ When paper is inserted in the manual paper feed tray,

MS3 is actuated and the main motor starts to turn the drive gears. The paper inserted is then taken up by paper feed roller B and is transported until its lead edge comes in contact with the PS plate. The rest of the copy paper operation is identical to the cassette feed operation

described in: (A- @ - @ ) The following shows the timing chart for the above operation.

Manualfaed

paper entry

sensor(M~)

READY

lamp (RPL)

“~

Papar entry

sansor(MSI)

Original table

faed

PS plate n

t—About 14 seconds—q

Paper detect

.,;,

C. Condition to establish a paper misfeed

-.’

At power on

;

If MS1 or MS2 ison at power on.

Manual paper feed

If the MS1 were to fail to actuate within 3 seconds

after the actuation of the MS3.

In the course of copying

If the paper lead edge does not actuate MS2 within

2.3 seconds from the first actuation of MS5 after the table started to advance.

If MS2 is still actuated in 1.4 seconds after the discharge lamp turned off at the last copy in the single copy or multicopy mode.

If MS1 is not actuated at the timing that the PFS turns on, during cassette paper feed.

2. Major component removal A.

Paper feed unit

@ Turn the copier OFF and disconnect the power cord

from the wall outlet.

@ Open the upper frame, disconnect the paper feed

solenoid connector, remove the paper feed unit holding

screws (A - D). Loosen screw E, and remove the paper feed unit.

Transfer corona unit

READY lamp atiuatiofl

Main motor

rotation

Paper detect

Original tabla

feed

PS plate release

Paper detect

–19–

B. Transferguide,transfercoronaunit

Remove the paper feed unit (A-o).

@ Remove the two transfer guide tension springs from

the paper feed unit, then remove the transfer guide.

@ Remove the three transfer corona securing screwsfrom

the paper feed unit, then remove the transfer corona

unit.

Papar feedrollerA

paperfeedroller B

Transfer guide

Tran~fer corona unit

Transfer guide tension spring

Page 21

C.Paperfeed rollers, A, B, C

@ Remove the paper feed unit (A-@).

@ Remove the transfer guide and the transfer corona unit

from the paper feed unit (B-@thru @).

● This is done to prevent breaking the corona wire.

Remove the E-ring, spring clutch unit, and bushing

from paper feed roller A. Then remove paper feed

roller A. Note that adjustment is required when replacing. Remove the E-ring, gear, pin, and bushing from paper

feed roller B. Then remove paper feed roller B.

Remove the E-ring, gear, pin, and bushing from paper

feed roller C. Then remove paper feed roller C.

Paper feed roller B

D. Remover tape

@ Open the upper frame, then remove the TD cartridge

and the drum cartridge. @ Remove the separation unit from the drum cartridge. CAUTION: Do not expose the drum cartridge to direct

sunlight.

Separation unit

@ Remove theremovertape from the separation unit.

E. Removal of the MS2 @ Remove the ACCURIDE fixing screwS (2 ‘crews) and

remove the table unit.

Original cover

\;~

‘ “

‘1

“%> ,

...”\

Rear frame side

>..

: ~

ACURI DE rail

‘ ti.

.-;:$ “...,..

‘->

. ..... >-,.,,,,

.. ~

,,/.’

~y~

A /

,,;[,1

,., i

,“’’;>*

@ Remove the covers.

. ,>;ear‘rame

/A .&

,Lower

Table Cover

- tipy Exit Side cover

Disconnect the following 4 connectors: main ~B 34

pin connector, high voltage PWB 5 pin connector, the FASTON connector and the high voltage PWB 3 pin connector. Cut the tywrap. (Take care not to cut any lead wires. )

Remove the 2 screws holding the PWB box assembly

in place.

Remove the 3 screws holding the main motor in place.

–m–

.>-,.. ....

Page 22

z–%

Disconnect the 6 pin connector which is connected to

....,.,{.,

-------

3. Adjustments

the relay PWB, then remove the main motor.

~elay PWB

A. Paper feed roller A lo~tion (angle)

(Check procedure)

@ Remove the paper feed unit from the copier (2-A-@).

/’ \\.

@ Turn gear inthe arrow direction unitilthe cl”tch sleeve

PWB Bo; Assembly

Main Motor

Disconnect

the MS2 2 pin connector which is attached to the relay PWB. Press on MS2.

,,/

both sides of MS2 fixing hook and remove

Relay PWB

F. RemovaloftheMSI andMS3Units

@ Open the Upper frame and remove the rear cover and

the paper feed side cover.

@ Disconnect the4pin connector onthe rear frame side.

@ Disconnect the lock catch of MS1,3 units from the

frame and Iifi out the units.

●

When MS1, 3 units are removed, the manual feed arm which isconnected to MS3 will be disconnected.

/ \

protrusion comes into contact with the paper feed latch. Make sure that the lower side of paper feed roller A is parallel to the lower side of the paper feed frame. The tolerance is O* 5°.

Gear A

n Paperfead roller A

(ie b

(View of the paperfeed unitfrom the rearframe side)

(Adjustment procedure)

@ Check the angle of paper feed roller A. @ Change the hook position of the clutch spring accord

ing to the degree of angular deviation.

View from the rear frame side

Viw from the rear frame side

a e’

@c’’’’’evQ

Changathe spring hook

Change the spring hook ~~’

position from C to B or A.

position from C to D or E.

Manual Feed Arm

●

–21–

~-a Remove the spring clutch assy (2-C-@-a). ~ @-b Disassemble the spring clutch assy and change the $

hook position of the spring.

i t.:

Clutch spring

27T gear

\ ?

Clutchboss ‘

-&p-&# ;

Reference holeC

Clutchsleeve

.,J

When reassembling the clutch, lube the clutch spring

with grease (U KOG-0062FCZZ).

I ,

Page 23

z–a

SHARP SERVICEMANUAL

CODE :O0ZZ50SM1 jl–E

MODEL Z-SO

[2] Operation panel and

[3] Unpacking and insta I o

[4] Supplies. . . . . . . . . . . . . . . . . .

w. .1

[51 ComPonent location . . . . . . . . . . . .

[61COPYprocess. .. . . . . . . . . . . . . . . . . . . . !

[7] Paperfeed and transport section . . . . . . . . . . . . . . .

[81 Optical system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .: .?.

[9] Fusersection

+~i

. . ... . . . . . . . . . . . . . . . . . . . . . . . . . . . ........ .. .

[10] Others . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . !

[11]

[12]

<35

Electrical section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Circuit diagramandtime chart

,...,.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

37 4

[13] Actual wiring chart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

SHARP CORPORATION

Page 24

Z–ti

[1] BASIC SPECIFICATIONS

Type:

Desktop

Copying system:

Dry-type electrostatic plain pmer copier

Kinds of originals:

Sheets, book Thickness: 30 mm (1 .18 inch) maximum with the

original cover in use.

Weight:

1.8 kg (4 Ibs) maximum

Original size:

A4 maximum

Copy size:

(Cassette feed)

A4, B5, A5 (56 to

80 g/m2)

or 8%x 5%” to 8% x 11” (14.9 lbs to 21.3 Ibs)

(Manual feed)

A4 to A6, postcard, businesscard (52 to 1309/m2 )

or 8Y2

x 11” to8Y2x 5%” (13.8 lbs to 34.5 Ibs)

COPY speed:

8 copies/minute (all sizes)

First copy:

11 seconds (time required until the copy paper is delivered to the exit tray after depression of the PRINT

switch for A4 or letter size paper.)

Warmup time:

20 seconds at rated voltage, room temperature at 20 to 25°C (68° to 77°F), 65%RH.

Multicopying:

1 to 19 copies, countdown type, with auto repeat

Magnification ratio:

1 : 1*1%

Exposure system:

Slit exposure by moving table.

Paper feed system:

Cassette and manual feeds

Developing system:

Magnetic brush development (2-component developer)

Fusing system:

Heat roller type

Light source:

Halogen lamp (1OOV series 200W, 200V series 215W)

Power requirements:

Local supPly voltage +10%.

Power consumption:

1.15 kW maximum, 50 wh standby (power down mode)

Physical dimensions:

411 (W) x 41O(D) x 209(H) mm

16.44(W)

x 16.4(D) x 8.36(H) inch.

Weight:

16 kg (35.2 Ibs)

Display Functions:

PRINT:

The green lamp turns ON when the copier is ready for copying,

turns OFF during

the warmup

time, and flashes when in the

power down

mode.

MU LTICOPY: Multicopy number dispiayed on LED,

normally O.

MISFEED:

The red lamp flashes when the paper is

misfed.

—

TONER:

Flasheswhen the toner box is empty.

DRUM:

ON after 8,000 copies. Starts to flash after 9,000 copies and the machine stops.

Accessories:

Semi-universal cassette x 1

Instruction manual x 1 Power supply cord x 1

Options:

Drum urtridge TD cartridge (black, red, blue, brown) ~~~ Machine stand (ZT-50D)

The term “TD cartridge”

means the “Toner Developer

cartridge”.

l–

Page 25

z–w

[2] OPERATION PANEL AND INDICATOR

FUNCTIONAL DESCRIPTION

Power switch and power ~upply cord Power is turned on and off using the power lever.

Upper frame release button Used to release the frame lock when a misfeed occurs or the drum cartridge has to be replaced. Doorswitch Used to check the front door position.

If the front cover is opened, the misfeed and multicopy indicator wi II be reset.

Auto exposure control Selects appropriate exposure rate depending on the contrast and background color of the original.

Exposure control lever

It has three set positions. For most originals, set at the center position.

To make the copy darker, move to DARK. To make the copy lighter, move to LIGHT. Misfeed indicator

When

a misfeed occurrs, this lamp turns ON. .

TD cartridge replacement indicator The lamp flashes when the TD cartridge needs replacement.

Drum cartridge replacement indicator

Afier 8,000 copies, the indicator will start to flash.

An additional 1,000 copies can be made. At this time the indicator will stop flashing and stay ON. No

additional copies can be made until the Drum canridge

is replaced.

Multicopy Copy numbers between 1 and 19 mn be entered

using the (–) or (+) key. Depression of the (–) key while “O” is displayed brings “19” into the display,

and continued depression of the key reduces the number. When the (+) is depressed after “19”, the

number is returned to, ::0”. Every time a copy is produced in the multicopy mode, the number in the display coun~ down. When the (–) isdepressed in the

middle of multicopy operation, the number of copies already

madeisdisplayed.

Auto repeat,j,.,, ~<.<.., ,,,,

(

Upon

completion of copying in the multicopy mode,

the copy number previously set returns to the copy number set.display. Use of the CLEAR key resets the number. One minute after completion of copying, the number @ the auto repeat functions are automatically cleared.

Paper

feedalarm(P indication)

If a sh~t of paper is not transferred to the paper stop.

par after depre~ion of the PRINT switch, or the cas-

sette is

empty,“P” is“displayedin the copy number

wind~~.

:If the COPY. NUMBER key or the CLEAR

key is depressed

or the MANUAL FEED switch is

Wb:’ti ‘~~kt”ti b~ned, the“p” indicationisalso

cancalled.

@ Clear

!~,+:

[

Multimpy and auto repeat

modes are cleared with the

:) ‘

CLEAR key.~~ne rnlnuti after completion of copy

. - ..-

‘;’:? fifi@;ati6nJ~&~~Qt n~rnbar and the repeat functions

are automatically W-tid.” i‘ “

@ PRINTswitch

~,; ~g ~ sacondsaftar-powar is turned on, the READY lamp

turns ON indicating ”-tit” the copier is ready

for

copying. if left unoparatad for go ~conds, the copier $tha: ~

into the power save mode and the {

READY lamp changes from ON to flashing. When

the PRINT switch is pressed while the READY lamp is

on, the machine immediately starts to copy. When

the

PRINT~itch ispressedwhile the READY lamp is

fkshin~

thepower~va modeiscancalled, the original

table rn&’’”to:’~+@py-~fi position, and it starts the

armup cycle. is dependent it will be less

the PRINT

–2–

....----

‘... . ..

;. ..

.. ~....

...

,’ ,.

.,..,.,

. . ,.- -. --.”.

. :......,..,*..-,.K,:

Page 26

z–%

[31UNPACKING AND INSTALLATION

1. Unpacking

(1)

Open the carton in the following sequence.

@ Cut the tape around the top of the package and

open the flaps.

@ Remove the accesso~ container top padding and take

out accessories.

@ Remove the upper packing cushion and take out the

reachinc.

Dust cover, instruction manual, and other printed materials

Itainer

)

, .

, ,

~ Cassette

-upper Packin9

CUShiOn

, Lower packing cushion

–3–

..- .

Page 27

2. Installation

Installation requirements: Please note the following requirements when installing the copier.

Machine Environment Avoid installation in direct sunlight or bright locations near a window.

Direct sunlight may cause the plastic components and

the original cover to deform. Frosted glass may also

produce the same effect.

.=—-.

‘r

s..!

‘-’ ‘:%2

‘. —.

,, —- .—

11---

Avoid installation in a hot, damp place or where

rapid changes in humidity occur (for example; near an air conditioner). This may cause paper to dampen or moisture inside the copier, and may lead to a misfeed and deterioration in copy quality.

Avoid installation in a place where the ventilation or air circulation is poor. Never install the copier near inflammable materials or

in the presence of ammonia fumes. Installation near a diazo copy machine may lead to a

deterioration of copy quality or a machine malfunc-

tion.

Install the copier near the wall outlet.

machine should also be allowed for ease of operation.

.....

/.. ,:.

.-.

:.4*$-,:,

The recommended environmental conditions are: ,

;,.~i, -

20 to 25 degrees C (68 to 77 degrees F.), 65%*5%RH:. ~ : The nominal environment conditions are: ‘ ‘.”>:;~~. -} “. ~~.,:.’”. .,

10 to 30 degrees C. (40 to 86 degrees F.), Ot~85%RH..~=~~ “’+S.:.- -

. .

If the copier is to be installed in an area~of<higher<,~>..<:,~:

temperature the humidity must be lower: Example;,.’ .,,<;’; .”

If the temperature, is 35 degrees C. (95 de;&~F\4$’’w:;. ‘‘~ the humidity should be 65%.

, \..’” .

~~““’’>”< ‘“>1 I ‘: -

Avoid installation in a place where dust or.<b~>~<~

,,. ,“

Ogeratin9 ran9e

encountered.

~~;”~~~~i~ur~ “

Dust deposit inside of the copier may lead to

ade <

ioration of copy quality or machine trouble.

‘T

1 me power

SUPPIY line should have a capacity of more

than

15A, capable of supplying more than 90% of the

-..

/ .-\

-..

~.. ‘ “:” . ‘-”’’” .. ,,~ ~ @ ‘::e:::’tageatfu” ‘oad.

use an extension cord, or operate any other

—

—.

—

-—

aq~ipment from the same wall outlet.

z-m ~

~ p

install the machine on a level surface.

.\/

... .. “

The toner density and copy quality may be affected

. .-

unlessthe machine is installed in a level condition.

Do not install the copier on an unstable or uneven surface. The copier must be placed on a level surface to

(4) Ground connection

@ Use a properly grounded (three prong) wall outlet

permit proper functioning.

only.

–4–

.- ...-,.-..—

Page 28

3. Installation procedure @

Remove the poly bag and tapeings that secure the

original table and the exit tray. Remove the desiccant.

● Desiccant is used in the USA and Canada only.

Tapeing

z-so

Desiccant is used to protect the drum

from moisture

absorption, it should discarded upon unpacking.

@ Open the front cover.

Push the front cover open buttons located at both sides

of the copier.

Open buttons

~ Install the drum cartridge (Except USA, Canada)

a. Open the front cover. b. Open the upper frame. c. Remove the cover from a new drum cartridge. d. Push in the drum cartridge all the way, then close

the upper frame.

Protective cover

-——

ODOD!D

Never expose the drum to direct sunlight or touch the drum surface with your fingers.

Open the box containing the TD cartridge. Remove the TD cartridge from the bag and shake horizontally four or five times.

,~,

\,&j

;--~

Remove the cover from the TD cartridge. Save the TD cartridge cover. It should be used to seal the TD cartridge if the copier must be shipped for servicing or in case you move.

Cover

Slide the TD cartridge in until it locks in place.

Close the front cover.

Remove the paper cassette from the bag.

Fan the copy paper and insert it into the cassette. (Maximum: 100 sheets)

f 5

—

5–

----

,-. .,,

Page 29

a. Push the pressure plate unti I it locks in position.

r 1

Pressu;eplate

b. Adjust the paper guides in the cassette to the COPY

paper width and length.

;OPV paper ength

paper width

c. Fan the copy paper and insert it into the cassette.

Make sure the edges go under the corner hooKs.

Swing the exit tray down.

Plug the power cord into the copier and then into the nearest outlet.

Turn the power on. After machine installation or TD cartridge replacement,

the ready lamp may require a longer period (No

minutes or less) before it turns ON.

~~ -

-’.

ihe~~C plu9 that

P. :: --

comas with the

& -.. ,

*F2:T:..:. ..

pr~uct

matches

ymr wall outlet.

..- —..- ..-.-—-.

4. How to mke a copy

@ Opentheoriginal qver. @

Place tie orig~~~i”’the upper right corner, and close

the originalcwer. .

Selectthenurnbrof copiesdesired.

● If a mi~ake is made, press the key to clear the entry

or hold the copy quantity key down. The maximum ‘number’’of-&-pi& is ,9. .,.,

. “O” will make a single coPY.

,..~,..- . :

@ Toam~e~~&oli9ht or darkoriginals.

NO**~y~ttO*e cenmrposition.

. .

*t &,.D$RK +:*%w.~e COPY.

. Set to L1’GHTtOli@Wn~~e coPY.

@ ~=Wfi~keY when the green light indicates that

-@&&--

‘---@ Joidarea

—————

—-—...

~ (approx. (gmm), 3/8”)

–6–

Page 30

[4] SUPPLIES

1. Drum ~~idm, TD ~~id~

TD cartridge

. .

L . . .

● Life

Storage conditions

Description

Product name

Approx. (temperature and humidity)

Drum canridge x 1

8,000

Instructions x 1

~-50DR

copies

t“ ----

TD cartridge

For USA

Except USA

x 1, (including

Blink ZT-50TD1

ZT-500C1

devdoper and

ZT-50TD2

ZT-50D

toner)

JIye ZT-50TD3

ZT-50

Brown

ZT-50TD4

ZT-50DC4

DE$ % .U

–St

4or

.x 3,m0 ~pias for black (2,700 mpies for color) for

● These are estimates only, life will vary depending on

A4 or letter size with 5% toned area.

actual usaaga.

NOTE: How to identify the lot number

(TD ~rtridge)

xl.

Developer kind

Serial number

Last digit of production year 6–1986

‘\

Production month (1, 2,3, ....0, X, Y)

Black developer (JAPAN)

5. Blue developer Black developer (EXPORT) 6. Brown developer Red developer

O. No classification

Lot number

MG roller

(Drum =~ridge)

%me as TD urtridge.

A rtnumber

L-

Rear frame side of the drum cartridge

–7 –

Page 31

z–s

2. Replacingthe drum @rtrid@

T“r” power offa”d OPe”thefro”t cover

@ Press down on the catch and pull out the TD cartridge.

Lock lever

TO ~rtrid~

Front cover

@ Move the original table to the left, andpress the uPPer

frame release button to open the copier.

Upperframe ralmw button

@ Grasp the handle of the drum cartridge and pull the

drum cartridge out.

NOTE: Thedrum cartridge cannot beremovedorinwned

unlessthe upper frame is open.

Remove the protective cover from the new drum cartridge.

Push in the drum cartridge all the way in, then clo~

theupperframe.

.;.

“’ . ,

. .:

.: -, ,

-..—

/iy

.x .c...,2 ,r”;t!.,.,.%..

——...._...-—..- .. . . .

T-

....... ...... ... . ....----

—---.-—.—-

--- --

A. A.-

-—

Insert the TD cartridge, then close the front cover. !. ; ‘ ~ .

Turn power on and make sure that the DRUM r-

—..—-

~:=,..

placement lamp is extinguished.

-..--..—-__.:”——.

‘“,

---

.....

.. ...

‘..

.’

%Tt’..a:a:?::..:. .

–“8 –

Page 32

z–m

[51COMpONENT LOCATION

1. External

Operation panel

@ Original cover

Front cover open button (paper entrv side)

@ POWER switch lever

@ Manudfeedgutie

@ Powersupplycord

o Qrrving handh(WPerentwtide)

@ Colorcheckwhdow

@ Etittray

)

@ Businesscard release lever

2. Open view ?

Drum cartridge

@ Cleaning lever

Upper frame release button

@ Fuser

@ Transfer corona unit

@ Fuser accessinglever

~ Transfer corona cleaner

–9–

Page 33

Z–N

...,—---- .

3. Front frame side

CLR PWB

@ Drum ca~ridge

@ Clea”i”g lever

@ To”er alletiion co”@i”er

TD cartridge

Doorswitch

(interlined for the main switch)

4. Rear frame side

0’(

Table start position sensor [M=)

@ :~~;~~l~e~j~:~;::rrun

~ %nsorati”atorarm

High voltaw transformerunit (MTHVG)

@ Powertransformer

Main PWB

@ Powerswitch lever

{

–lo–

—,. -..-,. .—..-.-.--,-,--

--.=

Page 34

5. Cross section

Z–M

Discharge lamp

@ Copy lamp

Main corona

@ SELFOC lens

@ Auto exposure sensor

@ OPC drum

~ TD cartridge @ MG roller

@ Toner concentration” sensor

@ Paper entry sensor (MS 1)

Manualfeedpaparentry sensor

o (MS ~)

@ PaperfeedrollerB

@ Paperfead roller A

@ ps plate

Cassettepaper feed solenoid(PFS)

@ Transfercorona

Q Separationroller

@ Lowerheatroller

@ Heaterlamp

@ Upper heatroller @ Paperexit sensor(MS 2)

Thermistor/thermalfuse/thermal breaker

@ Coolingfan (mainmotordriven)

–11–

Page 35

z–%

...

. Switch, sensor,solenoidlo~tions

Name

MS 1 Ms 2 MS 3 MS 4 MS 5 MSW

DVSW

Toner sensor

AE sensor

Thermistor

Thermal breaker

PSF TFS TRS

Type Switch

Switch

Microswitch Microswtich

Switch

Microswitch

Magnetic sensor

Photosensor

,,.

Thermistor

Thermal rasat . .‘ ~

Solenoid

,“‘i ,..;.

. .

e.. ., . ..

Solenoid ‘“’ “~~;:.

. . .;

Solenoid

7. Motor, transformer, lamp locations

Symbol

MTHVG

DL CL HL

Function

Paper entry sensor

Paper exit sensor .,Manual faad paper entry~sansor

Table mafi-~sition.~’~~’~~.---~~~,. ~.. .

.-.—...- --

——.+—. .

. . .

~-+ —-—---- -... ....—

Table home/ovarwn posmion sen~.,~=-=- ~~---

‘ /’

Power switch-’- ----+1,.=- ,,

Sensesi~llation,of-~e TD’,’~.tigs in tie copier.If the TD cartridge is not

g:~:~:h:.rn,:rga< s .

. m~o~~e ~uss po~r isnot sug~lied to the main

Name

Main motor

Toner motor

Powar transformer

Main and transfer high

voltage units

Discharge lamp

Copy lamp

Heater lamp

Function

..,- .. ,,,. , !

Main drive motor

alsodr.m the cooling fan.

. .. . . .

Tonar supply motor ..

“ ...4, ~.~....

Powartransformer. . .

.,. -- ‘;.

Maincoronaandtiansfarcoronahighvoltagesupplyunits

For remml of ‘-tiual ~ onthadrum surface

if. 2?4,>;

Forexposureof original. . :.. For heat roller

heating:: ;:G ,

Page 36

[61COPYpROcE~

2. Exposure

1. *sic mpy process

Light from the copy lamp, reflected from the original, is

Copyprocess

projected onto the drum surface through the SELFOC lens.

1.Charge

The resistance of the OPC layer decreases for the area

A uniform negative charge is applied to the OPC drum

exposed by the light (corresponding to the light area of the

surface by the main corona.

Originaltable

‘ainmrona~$j

NWative

8. Discharge

Prior to charge, light from the discharge lamp is projected over the drum to reduce electrical resistance of the OPC layer and remove any residual charge to evenly neutralize the drum surface.

Discharge lamp

‘o

original). The light neutralizes the negative charge. The dark areas of the original do not reflect the light and an electrostatic latent image is formed on the drum surface.

~~4

Copy lamp-

\ /

Selfoc lens

T ve

Remove any residual

lamp

........... .

7. Cleaning

Residual toner on the drum surface is collected by the cleaning blade.

\ I

- - --

Latent imWe

B. Copy process flow

Main highnltege unit

Main wrens

Di=hane lamp

Wtie toner wlletiion

C. Functionaldiagram

SWration roller

bwer heat roller

“

1’

–13–

--/

~.,... .....:,-

Page 37

/eloping

?ctrostatic latent image in the drum surface is coninto a visible image by the toner.

TD canri@e

(

MG roller

)

Toner

Dwelopar

4. Trantier

The visible image on the drum sufiace is transferred onto the copy paper by applying a negative charge from the transfer corona to the back of the copy paper.

Paper

\ Transfer corona )

5.¶tion

The paper is separated from the drum by the remover tape

and the separation roller.

~ I \ k. /

T-” .,*

6. Fusing

Through a mmbination of heat and pressure, the image is fused into the copy paper.

Lower heat roller

–14–

Page 38

z–x

2. imageforming processsteps

Step-2:

Step-3: Step-4:

Step-5:

Step-6:

Step-7:

Optical discharge

Residual charge on the drum surface is removed.

Charge

Latent image is formed on the drum. Exposure Developing Latent image formed on the drum is then developed into a visible image with toner.

Transfer The visible image (toner image) on the drum is

transferred onto the copy paper. Cleaning Residual toner on the drum surface is collected by

the cleaning blade.

Optical discharge Residual charge on the drum surface is remoyed.

3. Description of process

the drum surface. As the electrical resistance is decreased,

the positive charge in the aluminium layer moves to neutralize the negative charge present in the OPC layer.

Dischargelamp

Step-2: Charge A uniform negative charge is applied over the OPC drum surface by the main corona unit.

SELFOC Ians

—

Exposure (COpylamp)

! , , 1

II [1 [11

Drum sutiace charge

aftar the exposure

OPC layer

~Pigment

~la~er

++++++

~ _Aluminium

IaVer

Imaga area

Half-tone Non-image area area

Step-4: Developing (–230V DC bias) The electrostatic latent image in the drum surface is converted into a visible image by the toner. A bias potential of

-230V is applied to the carrier (MG roller) in this two component magnetic brush developing method, and the toner is charged positive through friction with the carrier.

O : Carrier (magnetized particle)

●: Toner (charga positive by friction)

(N) (S) : parmanent magnet

(provided in three locations)

!,,

.,,

.: -., ,, -- -

... - -—

-—

+++

{

–15–

r... ..........~-,Lv .

Page 39

z–x

-700’

Image area

–600’

~1/

“1

p charge

&Expos”re_DeveloPin9 -Transfer~i~ch~~harge

— Time

~Area

Toner is not attracted to the non<mage areason the drum because of the developing bias. Thus, if thedeveloPin9 bias

were to fail, the residual charge would attract the tonerso

that a background would appear in the non-image areas of the coPy.

Step-5: Transfer The visible image on the drum surface is transferred onto the

COPY paper by applying a ne9ative charge from the

transfer corona to the back of the copy paper.

As the transfer effect is 70 to 80%, 20 to 30% of the image

remains on the drum (residual toner) even after the transfer.

Step-6: Cleaning Toner remaining on the drum is collected by the cleaner blade and stored in the toner collecting container.

Cleaner

Residual toner

Step-7: Discharge (same as Step-1)

Step-8: The transferred image is fixed permanently on the copy paper by the action of the fuser unit through a

combination of heat and pressure, the toner is fused into the

COPY paper.

4. Photocondu~or

An OPC drum is used for the photoconductor. (Structure of the OPC drum

layers)

OPC layer

=(1 7 ~i~ron~ thick)

. ... .,.. ... ,.. .

.. .....

............ ......

‘.,.. .... . .

. ...

‘“::’ ‘_Pigment Iaver (0.2 to

0.3 microns thick)

_Aluminium drum

Page 40

.. . .......... ,--

z–s

[7] PAPER FEED AND TRANSPORT SECTION

1. Papertransport route and operational description

P8pertransp0rtro.*e

paper

Paper feed roller C

~aper fed roller

General Description:

Paper Feed Clutch (a Spr;ng Clutch) and Paper Feed

Solenoid. When the Print Button is depressed, the Main

COPY paper is transported to paper feed roller B and

trips the paper entry sensor MS1. Paper feed roller B con.

remover tape strips the COPY paper

from the drum and the separation

roller transports it to the fuser rollers. The fuser rollers transport the copy paper, tripping the exit sensor MS-2, to the exit tray.

During manual feed the inserted paper actuates the manual

manual feed operation.

paper feed roller A

feed

trav

The following discussesthe cassette feed and manual feed operations. A. Operation during cassette feed

@ The illustration below

shows the relationship be~een

paper feed roller A, paper feed clutch sleeve, and the paper feed latch locations when the copier is at an

initial state before the PRINT switch is pressed and after the READY lamp is ON.

(The paper feed latch is in contact with the clutch

sleeve protrusion. )

paperfeadlatc~ apaPerfe@ rollerA

Paper

Paper feed frame

Paper feed gear

\ f

\II / ClutchsPrin~

II IIB-@ I /

*$;’P

Paper feed roller A

Clutch sleeve

protrusion

Spring-clutch

(

–17–

,:.,.-

Page 41

.-..IL

)

,-,

At the moment the PRINT switch is pressed,the drive motor starts to turn the drive gears. The paper feed

gear also starts to be driven, but the rotation of the

gear is not conveyed to the paper feed roller shaft and the paper feed roller does not rotate becausethe paper feed latch is holding the clutch sleeve protrusion.

~ Rotating section

Paper feed frame

Paper feed gear

r feed

Paper feed roller-A

Clutch sleeve protrusion

Spring clutch

0.9 seconds after the start of the main motor, the paper feed solenoid (PFS) actuates momentarily so

that the paper feed latch disengages from the clutch

sleeve protrusion. Now, the rotation of the paper feed gear is conveyed to the paper feed roller shaft so that paper feed roller A starts rotating to feed the

paper.

Paper feed roller A

Paper feed frame

n Rotating

Paper feed gear

section

\ / Clutch sprin9

@ Meanwhile, the paper fed into the machine is trans-

ported to paper feed roller B and the paper entry sensor (MS1 ). There, the paper is held temporarily by

means of the PS plate, in order to synchronize with the lead edW of the image on the drum. Since paper feed

roller B is continues to rotate, the paper will be evenly pressed against the PS plate to correct for any paper

feed skew.

Tension roller

PS plate

m Paper

\ ., #

Paper feed roller A ..”

Spring clutch

~=rfed

@ As the original table starts to move, the PS plate is

mechanically raised to allow the paper to continue to

the transfer area.

PS plate release mechanism

Original lead edge

Original table

PS sensor arm

\ -/ /

SELFOC lens

,. —-.—.

Lead edge of the ima9e

! PS senwr block

PSjoint plate

Drum

Lead edge of paper ,/

After the PS plate has been released, the paper is transferred to the transfer unit via paper feed roller

C. The paper is separated from the drum by the remover tape and the separation roller.

Paper

Tension rollef

Drum

)

Remover tape

Separation roller

Transfer corona

@ AfierpaperfeedrollerAmakesonefullturn,

the clutch sleeve protrusion is again caught by the paper feed latch so that paper feed roller A stops rotating.

–la–

Page 42

The paper separated from the drum is transported to the exit tray through the fuser paper guide, fuser heat

roller, and the paper exit sensor (MS2) The following shows the timing chart for the above operation.

PRINT switch

(Psw)

depression

Main motor

(MMR)

, ‘ ~

rotation

“ina’tab’a~ “’ina’tab’e

‘:’’;:’)=’’’’”e

B.Operation during manual feed

@ When paper is inserted in the manual paper feed tray,

MS3 is actuated and the main motor

starts to turn the

drive gears. The paper inserted is then taken up by paper feed roller B and is transported until its lead edge comes in contact with the PS plate. The rest of the copy paper operation is identical to the cassette feed operation

described in: (A- @ - @ ) The following shows the timing chart for the above operation.

Manualfaed

paper entry

sensor(M~)

READY

lamp (RPL)

“~

Papar entry

sansor(MSI)

Original table

faed

PS plate n

t—About 14 seconds—q

Paper detect

.,;,

C. Condition to establish a paper misfeed

-.’

At power on

;

If MS1 or MS2 ison at power on.

Manual paper feed

If the MS1 were to fail to actuate within 3 seconds

after the actuation of the MS3.

In the course of copying

If the paper lead edge does not actuate MS2 within

2.3 seconds from the first actuation of MS5 after the table started to advance.

If MS2 is still actuated in 1.4 seconds after the discharge lamp turned off at the last copy in the single copy or multicopy mode.

If MS1 is not actuated at the timing that the PFS turns on, during cassette paper feed.

2. Major component removal A. Paperfeedunit

Turn the copier OFF and disconnect the power cord from the wall outlet.

@ Open the upper frame, disconnect the paper feed

solenoid connector, remove the paper feed unit holding

screws (A - D). Loosen screw E, and remove the paper feed unit.

Transfer corona unit

READY lamp atiuatiofl

Main motor

rotation

Paper detect

Original tabla

feed

PS plate release

Paper detect

–19–

B. Transfer guide, transfer corona unit

@ Remove the paper feed unit (A-o). @ Remove the two transfer guide tension springs from

the paper feed unit, then remove the transfer guide.

@ Remove the three transfer corona securing screwsfrom

the paper feed unit, then remove the transfer corona

unit.

Papar feedrollerA

paperfeedroller B

Transfer guide

Tran~fer corona unit

Transfer guide tension spring

Page 43

C. Paperfeed rollers, A, B, C

@ Remove the paper feed unit (A-@).

@ Remove the transfer guide and the transfer corona unit

from the paper feed unit (B-@thru @).

● This is done to prevent breaking the corona wire.

Remove the E-ring, spring clutch unit, and bushing

from paper feed roller A. Then remove paper feed

roller A. Note that adjustment is required when replacing. Remove the E-ring, gear, pin, and bushing from paper

feed roller B. Then remove paper feed roller B.

Remove the E-ring, gear, pin, and bushing from paper

feed roller C. Then remove paper feed roller C.

Paper feed roller B

D. Remover tape @ Open the upper frame, then remove the TD cartridge

and the drum cartridge. @ Remove the separation unit from the drum cartridge. CAUTION: Do not expose the drum cartridge to direct

sunlight.

Separation unit

@ Remove theremovertape from the5eparation unit.

Removalof theMS2

@ Removethe ACCURIDE

fixing screwS (2 ‘crews) and

remove the table unit.

Original cover

\;~

‘ “

‘1

“%> ,

...”\

Rear frame side

>..

: ~

ACURI DE rail

‘ t i.

.-;:$ “...,..

‘->

. ..... > -,.,,,,

.. ~

,,/.’

~y~

A /

,,;[,1

,., i

,“’’;>*

@ Remove the covers.

. ,>;ear‘rame

/A .&

,Lower

Table Cover

- tipy Exit Side cover

Disconnect the following 4 connectors: main ~B 34

pin connector, high voltage PWB 5 pin connector, the FASTON connector and the high voltage PWB 3 pin connector. Cut the tywrap. (Take care not to cut any lead wires. )

Remove the 2 screws holding the PWB box assembly

in place.

Remove the 3 screws holding the main motor in place.

–m–

.>-,.. ....

Page 44

z–%

Disconnect the 6 pin connector which is connected to

....,.,{.,

-------

3. Adjustments

the relay PWB, then remove the main motor.

~elay PWB

A. Paper feed roller A lo~tion (angle)

(Check procedure)

@ Remove the paper feed unit from the copier (2-A-@).

/’ \\.

@ Turn gear inthe arrow direction unitilthe cl”tch sleeve

PWB Bo~ Assembly

Main Motor

Disconnect the MS2 2 pin connector which is attached

to the relay PWB.

Press on MS2.

,,/

both sides of MS2 fixing hook and remove

Relay PWB

F. Removalof the MSI and MS3 Units @ Open the Upper frame and remove the rear cover and

the paper feed side cover.

@ Disconnect the4pin connector onthe rear frame side.

@ Disconnect the lock catch of MS1,3 units from the

frame and Iifi out the units.

●

When MS1, 3 units are removed, the manual feed arm which isconnected to MS3 will be disconnected.

/ \

protrusion comes into contact with the paper feed latch. Make sure that the lower side of paper feed roller A is parallel to the lower side of the paper feed frame. The tolerance is O* 5°.

Gear A

n Paperfead roller A

(ie b

(View of the paperfeed unitfrom the rearframe side)

(Adjustment procedure)

@ Check the angle of paper feed roller A. @ Change the hook position of the clutch spring accord

ing to the degree of angular deviation.

View from the rear frame side

Viw from the rear frame side

a e’

@c’’’’’evQ

Changathe spring hook

Change the spring hook ~~’

position from C to B or A.

position from C to D or E.

Manual Feed Arm

●

–21–

~-a Remove the spring clutch assy (2-C-@-a). ~ @-b Disassemble the spring clutch assy and change the $

hook position of the spring.

i t.:

Clutch spring

27T gear

\ ?

Clutchboss ‘

-&p-&# ;

Reference holeC

Clutchsleeve

.,J

When reassembling the clutch, lube the clutch spring

with grease (U KOG-0062FCZZ).

I ,

Page 45

Z–M

[81 OPTICAL SYSTEM

1. General description

●

Light from the coPy lamp is directed by a reflector at

the original. The optical system of the Z-50

copier (fiber

optics) directs the light reflected from the original and

focuses the reflected image on the drum. The intensity of the copy lamp is regulated by the exposure control switch. A photo sensor in the optical system sensesthe

contrast of the original, automatically adjusting the copy

lamp intensity, The range of the exposure control is regulated by the copy lamp control PWB. A thermal fuse is mounted to the main reflector for overheat protection.

The Z-50 is a moving platen copier. The original table

moves the original over the stationary optical system. The table movement is accomplished through two clutches, the table feed clutch and the table return clutch. These are spring clutches controlled by the action of the table feed solenoid (TFS) and the table return solenoid (TRS).

When the table is in motion an adjustable PS sensor block mounted on the table lifts the paper stopper plate which is used for registering the lead edge of the copy paper to the lead edge of the image on the drum.

A SELFOC lens is used so that the copy lamp light

(ima9e) reaches the drum surface in a short distance. Moving table method is used for exposure.

Exposure is controlled by varying the copy lamp voltage.

A photosensor (diode) is used in the optical system

for sensing contrast in the original. As the photosensor

receives light reflected from the original, the contrast of

the original is determined. The photosensor senses2mm

before the lens, to correct for any delay in the circuit or copy lamp.

General block diagram

Original

Original table moving direction

—11

Auto exposure sensor

p:.-k----

.arlatl

Copylamp intensitv

The exposure control lever on the operation panel.

The sensor is installed in the center of the 50 mm slit so

that the contrast of the original is sensedwithin this 50 mm

area.

For the original out of this area, the automatic exposure

control function will not apply.

Rear frame side

Table forward moving direction ‘

–u–

Original

set

reference line

Paper exit side

Sensingzone

Paper entrv side

SELFOC lens

Sensor slit

Front frame side

(Original table toP view)

2. Original table

The original must be placed to the right side edge of the table on the rear frame side. An image loss appears in the shadowed area due to paper separation.

Original set reference position

Table glass

Original lead edge

guide

-., - ---

Page 46

3. Void areaand imageloss @

Void area Make a copy with the original cover left open. The area of the paper copied white isthe void area.

CAUTION: Do not look at the exposure lamp while

making a copy with the original cover open.

This may injury your eyes.

Image loss

Indicates the area of image lost on the

copy.

Void area and image loss limits

(Original)

Copv

Original

Side image loss

/ /

-- ---- - —---

1’

Void area less

than 9 mm

3m-lo m ;

I I

Il.

Lead edge image losswithin 1 -4 mm

Void area

Lead edge

Omm

Side “

p9 mm, max.

Image loss

Led edge

1 -4 mm

Side

3-10 mm

4. Original tible driving Theoriginal

table is driven by the table drive gear train and

the direction select solenoids. (TFS, TRS)

A. Table action

S1OP

star?

Overwn

Paper ex,t side

Table

Pauerentryside

z–w

The table stops in the middle. The table moves to the starting position (paper exit side). The table moves towards the paper entry side while

exposing the original.

Begins to return from the overrun position and stops

at the stop position.

In the multicopy mode, the table returns from the

overrun position and moves to the start position again.

Structure of the table drive unit

Table drive gear

/ ‘7

Tableretu~n latch TFS

Tablefe~ clutch

TLble

return clutch

Drive unit front frame side view

MS 5 sensor arm

MS 4 sensor arm

Drive unit rear frame side view

C.Structureof thespringclutch

@ Crosssection

Cl”tch brake

Clutch slem

Brake $P,ing

Frame

Shaft

Clutch $Pr,ng

–ti–

-’ “’”’”

-= -+ ..” ,

-. . :.

Page 47

Z–M

(2)

Action

a. When the clutch brake is not latched.

Because there is a slight gap between the clutch spring

and the clutch boss (shadowed area), rotation of gear A

is not conveyed to gear B.

Clutch brake

Latch

Rotating sectio”

Clutch spring

Gap

Clutch boss

Gear B

Gaar A

When the clutch brake is latched.

The rotation of the brake is stopped by the latch. Since the brake is pressed against the clutch sleeve by the

brake spring, the sleeve also stops. At the same time the clutch spring tightens around the boss conveying the rotation of gear A to gear B (shadowed portion).

clutch brake

Brake 5Prin9

Clutch sleeve

btch

>aar B

Gear A

D. Theory of table movement

When the table is at rest (TFS, TRS OFF) The solenoids (TFS, TRS) are not energized. The latch does not catch the clutch brake and both feed and return clutches are not active. Therefore, rotation of

gear A is not conveyed to gear F. When the table is moving forward (TFS ON, TRS OFF)

The TFS is energized, the latch catches the forward clutch brake. Thus, the forward clutch comes into

action so that rotation of gear A is conveyed to gear F via gear E.

(Gear rotating directions and latch action)

(Foward)

Gaar F (table driving gaar, 32T)

Gear A (Connetied to the

= Gear C (23T)

drum drive gear 36/3BT)

ViW from the front frame side

when the table is returning (TFS OFF, TRS ON)

The TRS is enerqizd, and the latch catches the return

. . .—

clutch brake. Thus, the return clutch comes into action so that rotation of gear A is conveyed to gear F via

gears, B,

C, D, and E.

(Raturn)

Gear F

G~ar B

Gear A

View from the front frame side

–E–

......=...,.:,==,=----

Page 48

-A... . . . ..

5, Optical systemoperation

A. Time chart (single copy from cassette)

‘R’NTswitch(psw)~

Paper feed solenoid (PFS)

Table feed solenoid (TFS)

Table return solenoid (TRS) 1

0.2

COPY lamp regulator (CLR)

‘ I /0.1

0:05

I I

Table return ~~&< (MM)

II r

Table home/overrun position sensor(M&)

Home position

Table action

stop

Feed

r \-

Stop

NOTE:

Return

If a problem occurrs in the table drive system, a “L” status code will be displayed in the multicopy

window.

Timing explanation

With the depression of the PRINT switch, the main

motor starts to rotate. At the same time, the TRS

(Table Return Solenoid) is energized to move the table

to the start position (paper exit side).

When the table is sensed by MS4, the table stops

(start position).

(Start position)

Start position sensorarm

/ - *

.-,— —

_., --

Paper feed , ,

~—— –-~

‘R

I Paper exit side

side

L –—

MS 5 actuator arm

MS 4 actuator arm

Immediately after the copy lamp is turned ON (0.1

second), the TFS (Table Feed Solenoid) is energized.

Then, the table starts moving forward and exposure is

started for the original.

Although MS5 actuates while the table is being advanced, it continues to advance. At the second actuation of MS5, the table stops on the table overrun position (End of paper feed side).

stop ~

Return

PRINT switch depression

READY lamp on

Main motor rotation

Paper feed solenoid actuation

Table forward movement

Table return movement

Copy lamp on

Table detect

(Overrun position)

Forward clutch release arm

–\

Ov~rrun actuator arm

[

— ——

Ms5actuatorar~

JS4actuator arm

0.2 second afier the table stops, the TRS energizes so that the table starts to return with the copy lamp extinguished at the same moment.

When MS5 is actuated during table return motion, the table stops (table home position).

(Home position)

Home position sensor arm

-1

MS ~ amuator ark is 4 actuator arm

Page 49

Z–N

6. Major component removal

A. Copylamp,thermalfuse

@ Disconnect the copier from the wall outlet. @ Remove the two screws that secure the table glassrail,

as shown in the figure. Move the table glass in the direction of the arrows to expose the rail mounting

screws.

Original rover

@ Remove theoPti~al unitupper cover.

Remove the two screws, then slide the cover to the rear frame side to remove.

<,>

Optical unit upper ~ver

r \

Table drive gear train

Pull the OPY lamp electrode on the front frame side in arrow direction A to disengage the lamp from the

—.

electrode. Next, remove the copy lamp through the clearance between the exposure control plate and the

reflector.

NOTE: Change in the exposure control plate location may

vary the exposure balance.

Side refletior R

e side

(Installation precautions)

COPY larnP

Install the copy lamp so that the protrusion on the lamp points away from the reflector.

Exposure controi plate

\ copy lampprotrusion

Refletior

Thermal

fuse

Install the thermal fuse so

the reflector.

that it is in contact with

Ex~sure controlplate

\ I / COPYlamp

Eledrode

/ I

Refliaor

Thermal fuse

B.Optical unit

Remove theori9inal table (6A-O).

Remove the external panels (operation panel, rear

frame side, paper entry side, paper exit side, and under

the table).

Rear

frame sida

under the table

paper entw sida

I / /

–n–

Page 50

@ Disconnect the connections at three locations and

remove the four screwsthat hold the optical unit, then remove the optical unit.

SELFOC lens filter ~

9 \

“\

NOTE 1: The lens filt~~ must be cleaned with a soft cloth

dampened with water. Never use alcohol.

NOTE 2: Use only alcohol to clean the SE LFOC lens.

C. Table drive unit

Remove the table ghss assembly and the rear panel.

Remove the two screws that hold the PWB-box unit. Remove the three screws that hold the table drive unit,

disconnect one connector, and one hook.

‘w

(

‘K

‘v

@ If the copy appears as the above example, move

exposure control plate R in arrow direction A to balance the exposure.

Exposurecontrol~late R .%

Reflector

Moving the exposure control plate in arrow direction B causes the exposure to decrease so that the copy is darker.

B. Copy lamp intensity adjustment (using the pot on the

copy lamp regulator PWB) The copy lamp regulator PWB must be adjusted for any of the following reasons:

@ After replacement of the copy lamp. @ After replacement of the copy lamp regulator PWB or

any of its

components.

@ After replacement of theAEserssor.

(Adjustment procedure)

@ Remove the optical unit, and clean the surface of

the sensor with a cloth dampened with alcohol.

NOTE: Cleaning with dry cloth, may leave dust on the

sensor.

Replace the optical unit. Clean the original cover.

Set the contrast select switch to the middle position.

Make a copy without an original on the original table,

and adjust VR210 so that voltage acrossthe copy lamp regulator PWB IC H 1201 pin number 17 and GND is

6*04VDC. If adjustment was not attained ,with vR201, move the

exposure control plate F, R (Para 7-A) in the direction of A or B to adjust.

Drive”unit -

7. Adjustments and pr~autions

(tiPY lamp regulator PWB)

H1201, 17 pin

G~D

A. Exposure control plate (exposure balance adjustment)

When an uneven exposure occurs between the front and rear frame sides, move the location of the exposure control plates to adjust it. Before the adjustment it is mandatory to check the following to be normal.

● Corona wires

● TD cartridge

● Cleanliness of the optical system

@ Make ahalf-tone copy and check theexposure balance.

(Example)

Lack of exposure

Paper exit ~ direction

Half-tone copy

–B–

Page 51

[9] FUSER SECTION

1, General description

The image is fixed permanently on the copy paper by the action of the fuser. Through a combination of heat and

pressure, the ima~ is fused into the copy paper. The Upper

Heater Roller contains the heater Lamp, a 950 watt, Halogen Lamp. The temperature of the Heater roller

is detected by the Thermistor, which relays this informa-

tion to the Main PWB. When the temperature is low, the

Main PWB energizes the Heater Lamp through a solid state switch called a Triac. The Hinter Lamp stays on until the proper temperature is reached. The heater is protected from overheating by a thermal breaker and a thermal fuse. The thermal breaker is manual-

ly resettable. If either the breaker or the fuse opens voltage

to the heater lamp is interrupted, an “H” will appear on the

display panel and the copier will stop operation.

General block diagram (crosssection)

Thermal breaker

Thermal fuse

MS 2 actu

Discharge

)

Papar exit side

Lowerheatro,,er~FuserRaparguide

Elec’

‘~

(Top view)

ode cover F

Elactrode cover R

Separator pawl spring

Fuser paper guide B

—!

p“

—-

Upper heat roller

Thermal breaker

Reset button

Fuser compartment

Thermistor/the~mal fuse unit

accessinglever

A. Heat roller

A teflon roller is used for the upper heat roller and a

silicone rubber roller is used for the lower heat roller for

better toner fusing performance and paper separation.

Simple raising of the fuser compartment accessing lever separates the upper heat roller from the lower heat roller for easier misfed paper removal.

Separatorpawl

Two separator pawls are used on the upper heat roller.

The separator pawl is teflon coated to reduce friction with the roller and prevent a smear on the paper caused by the separator pawl.

C. Thermal control

@ The heater lamP, thermistor, ma;n

PWB, DC power

supply

PWB, and triac within the power supply unit are used to control the temperature in the fuser unit. To prevent irregularly high temperature in the fuser unit, a thermal breaker and thermal fuse are used for safety purposes.

Safety device

(thermal breaker, thermal

fuse)

Triac (within the power supply unit)

–29–

...

Heatedby the

heater

lamp.

(950W)

The surface temperature of tha upper heat roller is sensedby the thermistor.

Level of the thermistor is

controlled by the main PWB.

---

Page 52

The surface temperature of the upper heat roller is set to 170°C. The surface temperature during the power save mode is set to 100°C.

The self-check function comes active when one of the following malfunctions occurs, and an “H” is displayed on the multicopy window. a. When the heat roller surface temperature rises above

240°C.

b. When the heat roller surface temperature drops

d. e.

*1.

*2.

below 100°C during the copy cycle. Open thermistor (*1 ) Open thermal fuse (*1 ) Open thermal breaker contacts (*2)

In case of c, d, remove the nut on the terminal

board side and remove the thermistor unit. (See

2. E-@)

When the thermal breaker contacts are open, they

have to be reset using the reset button on the thermal breaker. It does not reset automatically.

2. Major component removal ~. Upperheatroller

Open the upper frame.

~ Remove the E-ring and disconnect the two connectors.

Remove the boss on the front frame, then the one on the rear frame side(arrow marks a thru d).

Electrode cover R

Fuser cover

Electrode aver WI ele~rode

Rear frame

ing

Fuser compartment

Lower heat roller

ont frame side

Z–M

Remove the fuser cover, electrode covers F and R, and the heater lamp. To remove the separator pawl from the upper heat

roller, hook the protrusion of the separator pawl on the frame, arrow a and b.

Pawl Protrusion

[~) Remove the roller retainer, gear, bushing, and the

upper heat roller.

●Roller retainer

●

R[i&;:Y?

~-;>

\’L

.-A

..y. \-

c~\

‘-”’

Fuser frame R

““’k Fuser frame F

● Use C-ring pliers to remove the roller retainer.

Roller

C-ring pliers

retainer

-\/7 w

Page 53

B. Lower heat roiier

@ Open

the upper frame and lift up the fuser compart-

ment access lever. Lift the lower heat roller up to

remove it.

Fuser compartment \

(Front frameside)

C. Heater

lamp @ Open the upper frame and remove electrode cover R. @ Remove

the heater lamp from the ele~rode, then

carefully slide out the lamp.

Ele@rAecover R

(Rearframeside)

D. Separator pawl @ Remove the upper fusar unit @ Remove the fuser cover. @ Remove the tension spring. Rotate the pawl in

direction A and match the machined surface of the

separator pawl shaft to the guide, then remove it from

the notch.

Saparator pawl shaft

machined surface

, /

Tension spring

Separator pawl shaft

Separator pawl shaft machined surface

Guide

Cut in the frame

E. Thermalbreaker,thermistor(thermalfuse)unit

Remove the upper fuser unit, and the fuser cover. Remove the fuser paper guide B.

Remove the screws and HL interface wiring harness

then remove the thermal breaker.

. .

–31–

...=.,.-. ,..—.-, ----

,....- .... +.

Page 54

@ Remove the ””tonthetermi”al board side a”dremo.e

the therm istor/thermal fuse unit.

Thermimor/Thermalfuseunit

Fuser

NOTE: Check items after the installation

. Thermal breaker

Check to see that the gap between the thermal breaker and the heat roller is 0.75 * 0.25mm.

Fuser paper guide B

HL interface

Thermal breaker holding brreaker

wiring harness

/HL interface wiring harness

,=wat

0.75

0.25mm

Upper heat roller

Thermistor

Make sure that the center of the thermistor is in contact

with the heat roller.

Z–M

[10] OTHERS

1. Drum counter

Copy number can be checked on the mechanical counter under the drum drive gear.

Drum drive gear

The counter in the

figure indicates the copy number of 3210, bttom to top

Counter cover

2. Main switch mechanismand premutions

The main power supply can be turned on and off with the POWER switch lever or opening and closing the front cover.

. When the front door is closed, the doorswitch shaft is

pushed by the protrusion on the front door which

actuates the actuator.

[

Doorswltch shaft

Front door

–32–

Page 55

●

-,....

Z–50

When the main switch lever is pushed up, the raising part of the cam rides over the actuator. When the front door

3. Removal of the Power Supply Unit

is closed, the actuator slides towards the rear frame side.

@ Open the frames and remove the rear cover. @ Remove the 2 fixing screws on the black cover and dis-

Doorswitch shaft I

Main switch cam

Main switch lever

. The SIide

plate presses down the main switch Protrusion

to turn power on.

Shutter

CAUTION:

connect the connectors. Then, remove the black cover.

Black Cover

‘\

Corm-tors

? ‘,

...

@ Remove the 5 fixing screws on the power supply unit

and disconnect the 2 connectors shown in the figure.

Then, lift the power supply unit out of the main body.

Power Supply PWB

/ ‘“

MSW

Do not remove transformer screws (Red, 2) when removing

Care must be taken not to close the front door with the doorswitch hole closed with a door “cheat” as it may damage the main switch shutter. The “cheat” has to

be removed

before closing the front door.

Actuator

Power Supply unit. It may damage the PWB as stress is added to the PWB. The transformer isdirectly soldered to the PWB.

–%–

Page 56

. .

‘ .-... -. . .

4. Drum cartridge

The drum cartridge consists of an OPC drum, main corona, remover tape, cleaning blade, auger roll or and SELFOC lens

cleaner. A small tab on the rear frame side of the cartridge

is used for resetting the mechanical drum counter. This is a one-time only action and will not reset the counter again if the drum cartridge were to be removed and reinserted.

Moving the SELFOC lens cleaner lever out and in simultaneously cleans the lens and the main corona wire.

Inside the drum ca~ridge the cleaner blade is in constant

contact with the drum. During the copy process the residual

image is removed from the drum surface by the blade. The auger roller transpotis the used toner to the toner collection container located on the front of the TD car-

tridge.

The remover tape located on th~ rear frame side of the

drum cartridge mechanically strips the paper from the

drum and guides it to the separation roller. Due to the COPY .

paper not contacting the drum in this area there is a void of lessthan 9 mm along the rear frame side of the copy.

NOTE: The drum cartridge is set to factory specifications

and is not adjustable in the field. If a problem

issuspected replace the entire cartridge.

Z–N

5. TD cartridge

General Description: The TD cartridge applies Toner to the elwtrostatically charged areas of the drum, and develops the latent image on the drum. The Magnetic roller is a rotating aluminum sleeve. At the center of the MG Roller are stationary magnets. These magnets hold and direct the developer. The developer is composed of very fine magnetic filings and is used to transport the Toner from the developer to the drum.

As the MG Roller rotates, it carries Developer and Toner. The Magnetic Field around the MG Roller forms the

Developer into a “Magnetic Brush”. The height of the

Magnetic Brush is determined by the Doctor Blade. The angle of the brush is determined by the position of the magnets in the MG Roller. The Auger Roller keeps the mixture of Toner and Developer

agitated and uniformly mixed. Since the Developer is

used as a carrier of Toner, the Developer is not used up, and the volume of Developer remains constant. As the Toner is

pulled out of the Developer, the ratio of toner to developer

decreases. The Toner Sensor measures this ratio, and

relays this information to the Main PWB which will energize

the Toner Motor (TM) when additional Toner is required.

The Toner Motor is mounted on the rear frame of the

copier.

The Toner Sensor and Bias connect to the Main PWB by a four pin connector located on the rear side of the Unit. The Bias voltage is used to prevent background by applying

a counter balancing charge to the Developer. NOTE: The TD cartridge is set to factory specifications

and is not adjustable in the field. If a problem

issuspected replace the entire cartridge.

–u–

Page 57

[11] ELECTRICAL SECTION

1. Block diagram

t t

Triac

1 L

I I

■ ■

MM TM

Relay circuit

Single chip microcomputer

Switch sensor

●

Driver circuit

(Main PWB)

●

a ,9 Q

2. Main PWB block diagram r

-—-— ————

--— — -—— ——-

—1

; I

;

I I I

I I

I I I I

: I I I

I I

L —-

DC power supply

I I II

IC5

.—-——-———

—— ———--——

–%–

Page 58

z–so

3. IC1 (singlechip microprocessor)signaldescription

2 3 4 5 6

7 8 9

10 11

12 13 14 15 16

17 18 19

21 22 23 24 25 26 27 28 29

31 32 33 34 35 36 37 38 39

n/Out

out out

—

out

In In In

In out out out out out out out out

—

— —

In In In

In out out out out out out out

— out

out

out out

—

Signal name

so SI

—

PFS

14 15

KI MDL1 MDL2

TFS

TRS

MHV

THV

CLR

RESET

—

VDD

—

13 MMR

TMR

DL TC

E F

B c D

—

Function

Pull down resistor

Switch sensing strobe

Switch sensingstrobe

Paper feed solenoid control, solenoid active with a high signal (H: +5V). Switch input Switch input

Heater trouble detect signal, active low (OV). Operation panel input, key on with a high signal (H: +5V).

Display digit select

Table feed solenoid control, solenoid active with a high signal (H: +5 V). Table return solenoid control, solenoid active with

a high signal (H: +5V). Main corona control, active with a high signal (H: +5V). Transfer corona control, active with a high signal (H: +5 V). Copy lamp control, lamp active with a high signal (H: +5 V).

Heater lamp control, lamp active with a high signal (H: +5 V). Reset active with a high signal (H: +5V).

Clock pulse +5V supply

Clock pulse GND (OV) Switch input Switch input Switch input Switch input

Main motor relay control, relay active with a high signal (H: +5V).

Toner motor relay control, relay active with a high signal (H: +5V).

Discharge lamp control, lamp active with a high signal (H: +5V). Not used Display segment signal Display segment signal D.i~lay segment signal

Display segment signal Display segment signal

Display segment signal Display segment signal GND (OV) GND (OV)

–%–

--—......

Page 59

z–%

[12] Circuit diagram and Timecha~

AC POWER SUPPLY CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

RELAY CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3g

RELAYP.w.B. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3g

DC POWER SUPPLY CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .....40

POWERSUPPLYP.W.B. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .......40

MAIN CIRCUIT.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .......41

MAIN P.w.B. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .......42

CLR CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .......43

CLRP.W.B. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .......44

OPERATION CIRCUIT–A, B.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. ....43

OPERATION P.W.B.A, B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. ....44

CLRH1201 (IC) INTERNAL CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..45

TIME CHART1 PRELIMINARY OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....46

TlMECHART2 SlNGLECOpy A4(8XXllti) SIZE,CASSE~E FEED. . . . . . . . . . . . . . . . . . .47

TIME CHART3A4(8ZX llfl)SIZE, MANUAL FEED COPY..... . . . . . . . . . . . . . . . . . . . . ..48

TIME CHART4’A4 (B% Xllti)SIZE, MULTI COPY . . . . . . . . . . . . . . . . . . . . . . . . . . .......49

pWB location

@ Main PWB

a. Controls the timing of the 2-50 copiers electrical

circuits.

@ Highvokage PWB

a. Supplies high voltage to the main and transfer

coronas, ON and OFF timing is controlled by a

signai from the main PWB.

@Powersupply PWB

a. Supplies voltages

for the motors, lamps, solenoids,

transformers and PWB’s.

MainPWB

H~hvdtWePWB

Powersupply PWB

CLRPWB

OperationPWB-A

Operation PWB-B

RdaVPWB

@ Copy lamp regulator PWB

Turns the copy lamp ON and OFF via signals

from themain PWB.

Automatically controls the copy lamp intensi~

via signals received from the photo sensor in the

optical unit.

@Operation PWB-A

a. Kay control and display signals via the main

PWB.

@OperationPWB-B

a. Exposure selection signalstothe copy Iamp regulator

PWB.

~ Relay PWB

a. Controls the power for the main motor and toner

motor through relays ON OFF time determined by signalsreceived from the main PWB.

–37–

Page 60

-.-. .,.

z–m

–3–

Page 61

...

——

I I I 1 1 I

I I

–39–

Page 62

z–a

NOISE

)

‘6K

— —

—

:==

--.—.

Page 63

. .

z–m

:2 -z

-i

-—

—-.

:Iill-m i ‘

‘L.

13 ~ ,2 > 11 :

—

!0 ;

-—. _ ——

–41 –

.. .. .

,. ::.,:

Page 64

z–a

–42 –

Page 65

,, .., .-.-r

:. ..- .

.~’. b,:..,:.. e:; ..,.

. .. . . . .:,,.,,.,,.. ,,*. ,

. . .

I I

~ +-J

L–_____--–-- ––-–--––-–––-_––

————--———---———--——

,--4

H; ZD,

0 . . .

–u–

.. ,.

Page 66

z–a

m“

–44–

-A

f.:-..5..5.:..-:.....-,...:.. ,-..

Page 67

z–m

— —

—

-————

...

—-——

Page 68

I I

I I I

—

-——

—

-—-

—

——-

L. ~.

L. [’

[’

L r

—

1 I

I I I

I I

I I I

I I

I I I I

I !

I I I I

I I

I I I I

I I

I I I I I I

I I

I I I I

I I

_— L

I I

—

I I I

I I I I

I I

I I I

I I

I I I I I

I I I I 1 I

I I I

I ~1 xl

I I

—-------- .

,e<ex. ., .

Page 69

—

●

—

–47–

Page 70

z–s

[

–@–

.. .... -. .

.“-------

Page 71

.,.,*..W ---

.. .. . .

m. ..**..-.

...,-.;:{.* , ,

..:

‘..-

.=-—....

----

–6V–

—

“

— —

—

L —

——

—

5- 7..-:.. . . . . ..

.—:– ...TY:-, -’+.*?: ..+.

w–z

Page 72

{

Uum >>. -

11-0

sem -

——

I 1 ,

L _ - --- — -_ -- _-,

Page 73

2–50

SHARP

SHARP CORPORATION

Information SystemsGroup Quality & Reliability Control Center Yamatokoriyama, Nara 639-11, Japan

1986 August Printed In Japan @