Sharp SF-7200 User manual

SF-7200
SHARP SERVICE MANUAL
CODE:00ZSF7200SM/E
MODEL SF-7200
CONTENTS
[1] Basic specifications
Ce
[2] Unpacking and installation
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[4] External and internal structure
[5] SF-7200 Copy process
[6] Paper feed unit
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{9} Developing unit
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[11] Copy quality adjustments ........0 0.00. c cece cnet e ese nee eneee ee
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[14] Self-diagnosis and test functions........ 0.0... e ee eee eee eee eee eeeeee :
[15] Electrical section
i 2
SHARP CORPORATION

SF-7200
FEATURES:
The SF-7200 has a moving original table copier which is
capable of producing 12 (letter size, A4) copies per
minute. The maximum original size is 10" x 14” (B4).
Two-step enlarge/reduce ratios:
Maximum enlarge ratio up to two times the original
image (four times in area).
Color copying:
Exchanging the developing unit enables you to produce
clopies in black, blue, red, or brown.
Automatic preheat:
In order to save power consumption, the copier will go
into the preheat mode automatically, when the machine
is left unoperated for about 20 minutes.
Front loading cassette:
It has the front loading, two-way cassette method. A
250-sheet universal cassette can be loaded on the ma-
chine on the lower part of the front cabinet, it permits
easier cassette mounting. Not only does this eliminate
the cassette from projecting out from the machine, but
it also saves on machine operating space.
The manual paper feed tray also works for a manual
insertion of special paper and single sheet two sided
copying.
Automatic exposure:
Clear image reproduction is obtained automatically. The
degree of exposure is determined by the copier, based on
the original density and background color.
Use of the OPC drum:
Clam shell design:
The
SF-7200
incorporates
a
clam
shell
mechanism
that
permits
easier
access
to
the
internal
mechanisms
for
machine
servicing,
drum
replacement,
and
paper
misfeed
removal.
Self diagnosis:
The
cause
of
a
machine
malfunction
is
displayed
as
an
alphanumeric
status
code
on
the
multicopy
display.
Test command function:
Test
commands
help
to
locate
trouble,
or
check
the
proper
functioning
of
a
component.
Internal drying heater:
Drying
heater
is
used
to
prevent
condensation
caused
by
abrupt
temperature
changes.
Keyboard commands:
Permits
multicopy
of
1
to
99
sheets,
repeated
copy,
and
interrupted
copy
(PAUSE)
during
multicopy
operation.
A
second
multicopy
count
may
be
entered
in
the
Pause
mode.
Using
the
Zero/Diamond
key
displays
the
total
number
of
copies
made.

[1] Basic specifications
Type:
Desktop
Copying system:
Dry-type electrostatic plain paper copier
Kinds of originals:
Sheets, book, three dimensional objects.
Original size:
10” x 14” (B4), maximum.
Copy size:
(Cassette and manual feed)
10” x 14” to 8%” x 5%” (B4 to A6) universal.
(Cassette feed)
10” x 14” to 8%” x 5%” (B4 to AS).
(Manual feed)
10” x 14” to 8%" x 5%" (B4 to A6).
Copy speed:
(Normal)
8%" x 11” to 8%" x 5%" (A4 to AS): 12 copies/minute
10” x 14” to 8%" (B4): 10 copies/minute
(When in enlargement and reduction)
10” x 14” to 8%” x 5%” (B4 to A5): 10 copies/minute
First copy:
8 seconds.
Warm-up time:
AO seconds at rated voltage and room temperature of
more than 68 degrees Fahrenheit (20 degrees centi-
grades) and relative humidity of 65%.
Multicopying:
1 to 99 copies, 10 key input, countdown type, repeat
and pause functions, and multicopy in the Pause mode.
Magnification ratio:
(Inch series)
1:2, 1:1.22, 1:1, 1:0.75, 1:0.64
(Metric series)
1:2, 1:1.22, 1:1, 1:080, 1:0.70
Exposure system:
Slit exposure with moving platen
Paper feed system:
Single 250-sheet cassette automatic paper feed and
manual paper feed.
Developing system:
Two component magnetic brush development.
Toner supply:
Automatic toner control system.
Photoconductor:
80¢ OPC drum
Cleaning system:
Blade cleaning
Paper separation system:
Separation sheet method.
Original alignment:
Front side aligned.
Paper transfer system:
Feed roller.
Charge system:
Negative dc corona.
Transfer system:
Negative dc corona.
|
SF-7200
Discharge system:
Positive dc corona and discharge lamp.
Light source:
Halogen lamp
100V series: 220W
110V series: 280W
120V series: 2230W
127V series: 280W -
200V series: 280W
Power requirements:
100VAC, 50/60Hz
110VAC, 50/60Hz
120VAC, 60Hz
127VAC, 60Hz
200VAC, 50Hz
220VAC, 50/60Hz
240V, 50Hz
Power consumption:
1.35kW
Fusing system:
Heat roller type
Upper heat roller: Teflon (R) (1150W)
Lower roller: Silicon
Physical dimensions:
530(W) x 490(D) x 345(H)mm
Weight:
About 44kg
Display functions:
Ready (print) indicator (green):
On when the copier is ready for copying.
Preheat indicator (red):
Flashes in the preheat mode.
Multicopy indicator (green):
Displays
the
number
of
copies
to
be
made,
normally
set to “0”.
Displays
the
total
copy
count
or
the
number
of
copies already made.
Displays
the
location
of
a
misfeed
in
the
copier
using
the silhouette figure.
Displays
the
status
codes,
and
test
command
num-
bers.
Repeat indicator (green):
On in the Repeat mode.
Pause indicator (green):
On in the pause mode.
Paper out indicator (red):
On
when
the
cassette
is
not
loaded
or
the
cassette
is
out of paper.
Toner indicator (red):
Flashes when the toner box is empty.
The
copier
stops
immediately
in
the
single
copy
mode.
The
copier
stops
after
completing
the
copy
number
currently in the multicopy mode.
Maintenance
indicator
(green):
(Flashing
Print
Switch)
On when scheduled maintenance is required.
Developer indicator (red):
On when the developer replacement period is reach-
ed.
Flashes when the life of the developer in the tank
expires (15,000 copies).
1-1

SF-7200
Misfeed indicator (red):
On to indicate a misfeed.
Misfeed location indicator:
Indicates, on the multicopy display, the location of a
misfeed, using sihouette figure. ;
Auto exposure indicator (green):
On when the automatic exposure function is active.
Toner collector full indicator (red):
Flashes when the toner collector is full.
The copier stops immediately in the single copy
mode.
The copier stops after completing the copy number
currently in the multicopy mode.
Magnification display:
Indicates the chosen magnification ratio.
Accessories:
Universal cassette (w/o cassette cover) x 1
Copy tray
Charger cleaner
Charger brush
Manual feed guide
Instruction manual
Warranty form (SCA only)
Dust cover (part of Africa and Middle East only)
Options:
Universal cassette with cover (SF720UA: Inch,
SF720UB: AB)
Cabinet (SF720D)
Personal counter [SF71B (socket), SF-71A (counter)]

SF-7200
[2] Unpacking and installation
1. Unpacking
(1) Open the carton in the following sequence.
® Cut the PP bands.
® Remove the upper packing case.
® Remove the top padding assy.
® Remove the tape that holds the four corners of the
bottom case, then open the bottom case.
6 Remove the copier body from the bottom case.
(Packing case)
(Accessory container)
= Instruction manual
i vk
Upper packing case
Gi Paper receive tray
j Manual feed guide
>
Top padding assy
Accessory container
Cassette
Accessory container
Copier
Oil felt
PP band
Bottom packing case
Taping

SF-7200
2. Installation
Installation requirements
Please note the following requirements when installing the
copier.
(1) 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.
® 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 frost to occur
inside the copier, and may lead to a misfeed and a
deterioration in the copy quality.
The recommended environmental conditions are:
20 to 25°C (68 to 77°F), 65% + 5%RH
The nominal! environmental conditions are:
15 to 30°C (59 to 86°F), 20 to 85%RH.
If
the
copier
is
to
be
installed
in
an
area
of
higher
temperature
the
humidity
should
be
lower.
Example;
If
the
temperature
is 35°C
(95°F),
the
humidity
should
be
65%.
% RH |
85
65
Hum idi ty
20
15 80 35 =
Temperature
@) Avoid, installation in a place where dust or vibration is
encountered.
Dust deposit inside the copier may lead to a deteriora-
tion of copy quality or machine trouble.
@
Do
not
install
the
copier
on
an
unstable
or
uneven
surface.
The
copier
must
be
placed
on
a
level
surface
to
permit
proper
functioning.
6)
Avoid
installation
in
a
place
where
ventilation
or
air
circulation
is
poor.
©)
Never
install
the
copier
near
inflammable
materials
or
in
the
presence
of
ammonia
gas.
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
10cm
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.
(3) Copier table
Install
the
machine
on
a
level
surface.
Place
a
water
level
in
the
center
of
original
glass
and
check
level
front
to
rear
and
side
to
side.
Use
as
many
adjusting
shims
as
required
until
the copier is level.
NOTE:
The
parts
code
of
the
water
level
is
UKOGM0054-
CCZZ.
Thickness: Imm
Height adjusting shim
(PSRA-0002FCZZ)
NOTE:
The
toner
density
and
copy
quality
may
be
affected
unless
the
machine
is
installed
in
a
level
condition.

(4) Power source
® The power supply line should have a capacity of more
than 15A, capable of supplying more than 90% of the
rated voltage at full load.
@ Do not use an extension cord or operate any other
equipment from the same wall outlet.
(5) Ground connection
®D Use a properly grounded (three prong) wall outlet
only.
@® Wall outlet must be properly grounded.
©) Connect the ground cable to an authorized ground line
connected to 3 copper bar more than 65cm (25.6”)
buried underground, but never connect it to a gas line.
3.
Installing
Supplies
and
Components
(1) Cleaning the corona wire
(@ Unlock the developing unit access cover lock lever, and
remove the developing unit.
2) Open the clam shell.
@) Remove the drum holder unit from the copier.
Main corona unit
Remove the green screw.
Drum holder unit
@® Remove the transfer corona unit.
Transfer corona unit
SF-7200
@) Remove the discharge corona unit.
NOTE:
Use
Caution
to
avoid
drum
damage.
Drum holder unit
743
emove the
green screw.
6)
Clean
the
corona
wire
with
the
corona
wire
cleaner.
(2) Installing the drum and the cleaner blade
(1)
Unlock
the
developing
unit
access
cover
lock
lever,
and
remove
the
developing
unit.
(2) Open the clam shell.
(3)
Remove
the
drum
holder
unit
from
the
copier.
Drum holder unit
(4)
Remove
the
cleaner
blade
tension
screw
to
release
the
cleaner
blade
tension
and
remove
the
blade
cover.
(2 screw)
Raat
lever
in
the
arrow
direction
until
it
hits
the
screw,
then
secure
the
cleaner
blade
with
the
screw.
‘(Drum
holder
unit
front
frame
side}

(Drum holder unit
rear frame side)
Tighten the cleaner blade securing screw with care not
to move the cleaner blade holding shaft. :
(©) Remove the drum holding shaft from the drum hoider
unit. To remove the drum holding shaft, remove two
screws that secure the drum unit, and turn the shaft
counterclockwise, then pull the unit out.
©) Install the cleaner blade to the drum holder unit clean-
er shaft and replace the Blade Cover.
Blade cover
Remove the drum
protect sheet.
Take note of the drum number.
Drum holding shaft
@®
Take
note
of
the
drum
number
on
the
front
frame
end
of
the
drum,
Peel away the drum protection sheet from the drum
surface and mount the drum in the drum unit.
NOTE:
The
white
powder
found
on
the
cleaning
blade
and
the
drum
surface
is
used
to
reduce
friction
between
these
two
parts.
Do
not
remove
the
white
powder.
Replace
the
drum
holding
shaft
in the
drum
holder
unit.

@) Apply tension to the cleaner blade.
Push the cleaner blade tension
lever in the arrow direction
until it hits the screw, then
secure the cleaner blade with
the screw.
(Drum holder unit front frame side)
\
(Drum holder unit
rear frame side)
Tighten the cleaner blade securing screw with care not
to move the cleaner blade holding shaft.
(0) Install the drum holder unit along the guide.
Blade cover
Chassis.
Drum holder unit
iz
SF-7200
@) Install the toner collect bag to the waste toner collect
box. Open the toner collect bag to install.
Toner collect bag
Waste toner collect box
@® Install the toner collect container.
(3) Installing the developer and toner
@ Release the developing unit lock fever and pull out the
developing unit.
DV unit accessing lever
Developing unit
@) Hold the developing unit handle and lift it out from
the developing unit mount.
4
DV unit handle
Developing unit
DV unit mounting bracket
2-65

SF-7200
8 Remove the toner hopper from the developing unit.
@) Pour an entire bottle of the developer into the develop-
ing unit while rotating the MG gear counterclockwise.
Use the MG crank handle UKOG-0091CSZZ.
——
Toner hopper
Remove
Developing
unit
e)
MG roller crank handle
co
© Replace the toner hopper on the developing unit.
(8) Place the developing unit on the developing unit
mount.
( Open the toner hopper cover and set the toner cart-
ridge on the toner hopper.
(Open the toner hopper cover)
Toner
cartridge
(Installing the toner cartridge)
Toner cartridge
Evenly load the contents of the toner cartridge into the
toner hopper.
Lightly tap the toner cartridge in order to empty all
the toner contents.
Toner cartridge
Seal
@) Remove the toner cartridge and close the toner hopper
cover.
G0)
Close
the
developing
unit
mount,
and
set
the
develop-
ing
unit
lock
lever
to
locked
position.

(4) DV sensor level adjustment
@) Manually actuate the doorswitch (DSW) and turn on
the power. -
@ Execute test command 25 to stir the developer for a
period of one minute.
(Test command execution procedure)
G>B>h)>
Fl>e)>
8
“PRINT
button
oe) Manually actuate the doorswitch (DSW) and press the
PSW key. The test command 25 now starts to execute
to stir the developer for one minute.
® After stirring the developer for one minute, press the
PSW key to perform test command 25 once more.
Turn the DV sensor level adjusting screw clockwise
until the toner empty lamp (TEL) activates. .
G) Slowly turn the DV sensor level adjusting screw clock-
wise and stop when the TEL goes out.
I
DV sensor level adjusting screw
= Front frame side
Lad
(5) Setting drum sensitivity
@ Remove the drum sensitivity switch (DSSW) cover.
Auto exposure contro! switch
Leading edge of paper
SF-7200
@ Set the DSSW position to the first digit of the drum
number noted before.
Example: .
If the drum number is 2B1984, set the DSSW to “2”.
@) Set the auto exposure control switch to the “N”
(normal) position.
(DS-SW) Auto exposure control switch
1 2 3 4
———— —
D N Lil L2
Darker Lighter
>
Darker Lighter
NOTE: Copy density may vary depending on the position
of the DSSW and the auto exposure control
switch.
4. Copy Tests
(1) Void area and image loss
Make
copies
in
every
magnification
ratio
to
ensure
that
void
area and image loss are within the given limits.
(Rear)
(Original)
(Front)
'(Void area and image loss at the lead edge)
—+<— Image loss (1+0.5mm)
Void area (2.0+ 1.5mm)
(Void area and image loss at the separator side)
Edge of paper on the rear cover side
=
:
fs. Image loss
Void al as 3~ 10mm
-
+1 —2mm

SF-7200
(2) Skew (4) Resolution
Make a copy on B4 (10” x 14’) paper and ensure that a Make one copy of the test chart (UKOG-0089CSZZ) at
skew is within the given limits. every magnification ratio. Make sure that their resolutions
1.5mm or less (during cassette feed) are within the given limits below.
2.0mm or less (during manual feed) Center/Corner
Normal: 5 lines/mm 4.5 lines/mm
1.5 (2.0)mm, { =a : Enlarged: 4.5 lines/mm 4 lines/mm
maximum Reduced: 3.6 lines/mm 3.2 lines/mm
5. Automatic Preheat and Function Preset
As the SF-7200 permits selection of the automatic on/off
function, the following command entry should be observed
to assign or cancel the automatic preheat function. The
—
:
i i
i
hen
th
Check
the
copy
density
athe
Following
manner:
automatic
preheat
function
has
not
been
assigned
when
the
copier
left
the
factory.
‘oO
Place
four
sheets
of
blank
white
paper,
120mm
x
:
Press
the
following
sequence
of
keys:
360mm, on top of h other in ali i
mm p of each other in alignment with the (Clear]~[Repeat|->(Zero|~ [Pause|->[6]>[6- Revs
original
set
mark
on
the
front
frame
side
of
the
original
5
ee
:
f
PDP
f
th t
table,
and
place
the
test
chart
(UKOG-0089CSZZ)
on
If
the
PDPL
is
active,
it
indicates
the
assiOnnent
of
the
auto
power
down
mode.
If
not
active,
it
indicates
the
auto
it,
so
that
the
gray
scale
portion
of
the
test
chart
is
,
;
power
down
mode
is
not
assigned.
pepied, To set the auto power down mode active, press the power
down key after the above operation to make the PDPL
active, then press the PSW key.
To clear the auto power down mode, press the power down
key after the above operation to make the PDPL deactive,
then press the PSW key.
(3) Copy density
Gray
scale
Test
chart
(UKOG-0089CSZZ)
Place two sheets of twofold blank white paper of
10" x 14” (A4) size.
Q) Make one copy of the normal size and one copy of
“'1:2.0" size in the manual exposure mode at 5. Ensure
that the gray scale strip 0.5 appears slightly foggy.
(KODAK gray scale: 4.0 strip)
8) Make a normal size copy in the manual exposure mode
at 1. Ensure that the gray scale 0.1 appears slightly
copied. (KODAK gray scale: 1 strip)
Make a copy in the ‘’1:2.0" size in the enlarge mode.
Ensure that the gray scale 0.1 appears copied. (KODAK
gray scale: A or 1 strip}
© Make one copy of the normal size one copy of ‘1:2.0”
size in the manual exposure mode at 2.0.
‘G) Make one copy of the normal size and the ‘'1:2.0” size
in the automatic exposure mode. Ensure that they have
the same copy density as the ones made under the
exposure setting of 2.0.

SF-7200
[3] Supplies
1. Developer, Toner, Drum
a
7
Developer
Drum x 1
Drum unit
Drum blade x 1
Toner collect bag x 4
Remover tape x 1
|
(Red)
|
Developer
tank
container
x
1
a
SF-720K2
(Blue) Developer tank x 1 i SF-720K3
Developer x 1
Toner
(500
copies)
x
1
ae
SF-720K4
Upper heat roller x 1
60,000 SF-720HR
Lower heat roller x 1
Separater pawl (Upper) x 3
Cleaning roller kit Cleaning roller x 2 | 18,000 | SF-720RL
% PH
Toner cartridge
SF-720DR
Developing kit
Heat roller kit
24 months
(From production
month)
Drum 15000 copies
Developer
24 months
(From production
month)
15000 copies (800g)
7500 copies (90g) for black, red,
and blue for A4 or letter size
with 6% toned area.
24 months
(From production
month)
(AIl items must be unopened.)

Ie
[4] External and internal structure
External Structure
Original stack
Original cover
Color check window
SF-7200
Developing unit cover open/close
lever
Manual feed tray
+
Paper size indicator —
Operation panel
Cassette
Front cover
Receiving tray
Clip tray

Pa
SF-7200
2. Operation panel
Inch series
BY x1m Bx 120.75
8x11 P8454 10.64 (am
BSmAd> Bd
mm =6AUTO
MANUAL
1
BMireiiis i?
B4rAdmBs
Misfeed Lamp Copy Counter Clear Key
Power Save Key Print Button Zero/Readout Key
Number Keys Repeat Key Pause Key
Toner Replenishment Lamp Toner Collection Lamp Developer Replacement Lamp
Reduction Key Same Size Key Exposure Control Lever

3. Front Side
Copy lamp intensity regulating pot
Drum sensitivity select switch
(DS-SW)
Exposure control pot
SF-7200
Operation PWB
Discharge corona
Main corona
Drum holding shaft
Balancer
Paper size indicator
Transfer corona
}_____
Toner collect container
Cassette
Automatic exposure correction
switch
Heater lamp
Manual fusing roller handle
4-3

SF-7200
4, Rear Side
g ) @M @®) a4 a3)
DC
power
supply
PWB
Original
table
Drive
pulley
Table
drive
unit
Table
drive
wire
Table
speed
select
solenoid
MS7
(rear
cover
side)
MS5
MS6
Table
speed
select
solenoid
Paper
delivery
roller
drive
gear
Heater
lamp
|
Main
PWB
Drive
train
High
voltage
units
(main,
discharge)
Separator gear High voltage transfer unit Drive unit
Drive unit rotation sensor
(PT
sensor)
DSW3
Balancer
®
=
@
®
®
®
®
®
Toner motor

5. Right Side (paper entry)
®
Table guide
SF-7200
6)
Ko
Ee td
Developing unit open/close lever
Rail
Balancer
Paper feed roller, B
Rubber footing
Paper feed roller, A
U-turn guide

4 SF-7900
6. Left Side (paper exit)
| FF a
———
|
a
|]
| lw @,
2 he Hi ne i
7 seat BS tie: ri —H
Lif
3 i a Ny i tae ii ,
ee | |
AIM
Cooling fan Cooling fan motor- Clam sheel lever
Clam shell latch Power switch Power transformer
Paper delivery roller Discharge brush Fuse
Power relay Paper exit guide

7, Original Table Side
Table glass
Operational pane!
Clip tray
MS6 actuator adjusting screw