Samsung SF5800 Expoioded View and Parts List

7. Maintenance & Troubleshooting

7-1 Preventative Maintenance

The cycle period outlined below is a general guideline for maintenance. The example list is for an average
usage of 50 transmitted and received documents per day. Envir onmental conditions and actual use will vary
these factors. The cycle period given below is for refer ence only.

Samsung Electronics 7-1

COMPONENT CLEANING CYCLE REPLACEMENT CYCLE SOLUTION

SCANNER

PRINTER

ADF Rubber
ADF Roller
Drive Roller
White Roller
CIS
Cartridge
Pickup Roller
Feed Roller
Transfer Roller
Fuser
Driver

6 Months
1 Year
1 Year
6 Months
6 Months

1 Year
1 Year

10,000 Pages
20,000 Pages
50,000 Pages
50,000 Pages

5,000 Pages
50,000 Pages
50,000 Pages
50,000 Pages
30,000 Pages
50,000 Pages

7-2 Diagnostics

This section describes methods and procedure s t o isolate the cause of a malfunction in the machine. This
machine displays diagnostic information on the LCD. In addition, it can perform a series of tests that allow the
machine to observe individual machine functions.

7-2-1 Error Messages

Error Message Description Solution

BUSY! REDIAL? The machine is waiting the programmed You can press STA RT to immediately

interval to automatically redial. redial, or STO P to cancel the r edial

operation.

COMM. ERROR A problem with the facsimile Tr y again.

communications has occurre d.

DOCUMENT JAM Loaded document has Jammed Clear the document Jam.

in the feeder

7-2 Samsung Electronics

Maintenance & Troubleshooting

Error Message Description Solution

The top cover is not securely latched.DOOR OPEN or

NO TONER

Replace the cover firmly until it clicks in
place.

You have tried to select a gr oup location
where only a single location number can be
used, such as when adding locations for a
multi-dial operation.

GROUPNOT
AVAILABLE

Try again, check location for group.

No toner cartridge in the fax machine.
The machine stops.

Install the toner cartridge in place
properly.

Your unit cannot connect with the r emote
machine, or has lost contact because of a
problem on the phone line.

LINE ERROR Try again. If failure persists, wait an hour

or so for the line to clear then try again.

You have attempted to set up a sending
operation with no document loaded.

LOAD DOCUMENT Load a document and try again.

The memory has become full.MEMORYFULL Either delete unnecessary documents, or

retransmit after more memory becomes
available, or split the transmission into
mo re than one operation.

The remote machine was not answere d after
all the r edial attempts.

NO ANSWER Try again.

Make sure the remote machine is OK.

The one-touch or speed dial location you
tried to use has no number assigned to it.

NO. NOT
ASSIGNED

Dial the number manually with the
keypad, or assign the number.

The recording paper has r un out. The printer
system stops.

NO PAPER Load the recording paper in the paper

feeder.

Recording paper has jammed in paper
feeding are a.

PAPER JAM 0 Press ST O P and clear the jam.

Recording paper has jammed inside the unit.PAPER JAM 1 Clear the jam.

The printer part has overheated.OVERHEAT Your unit will automatically return to the

standby mode when it cools down to
normal operating temperature . If failure
persists, call service.

Samsung Electronics 7-3

Maintenance & Troubleshooting

Error Message Description Solution

The jammed paper still remains inside the
unit.

PAPER JAM 2 Clear the jam.

When setting up to poll another fax
machine, you have used an incorrect poll
code.

POLLCODE ERROR Enter the correct poll code.

The remote fax machine you want to poll is
not r eady to r espond to your poll.

POLLING ERROR The remote operator should know in

advance that you are polling and have
their fax unit loaded with the original
document.

A power failur e has occurred .POWER FAILURE If ther e has been documents stored in

memory. Power failur e report will be
printed automatically when the power is
restored.

The machine is warming up and is off line. PLEASE WAIT W ait until the machine is on-line.

Refer to tr oubleshooting “FUSER
ERROR”.

There is a problem in the Fuser unit.FUSER ERROR

Refer to tr oubleshooting “ENGINE
ERROR”.

There is a problem in the LSU (Laser
scanning unit)

ENGINE ERROR

Maintenance & Troubleshooting

7-2-2 Test Mode

The test mode is used to test certain functions of the
machine. The available tests are:

•User mode : Self Test

•Tech mode : Switch Test → Modem Test →

Memory Test → ROM Test →
DRAM Test → Pattern Test

To enter the Test Mode:

1. Get into the Tech mode by pressing Menu,#,1,
9,3,4.

2. In Tech mode, press Menu, and ‘Maintenance’ on the
one-touch keypad.

3. Scroll to the options by pressing „or
repeatedly until you find the one you want.

4. Press Enterto initiate the test mode.

waveform in the pattern. It is best when the wave
form is level. If there are many points sharply
broken, perform the Make shading procedure
several times until you get a level waveform.

SWITCH TEST

This test checks the operation of the LCD display
and the LED indicators that interface the switches
on the operation panel.

MODEM TEST

This test causes the machine to generate a particular
frequency to verify the operation of the modem
control circuits and the modem.

MEMORY TEST

This test is used for checking the Random Access
Memory (RAM) on the main PBA. If all memory is
working normally, the LCD shows TESTING OK!.
When this testing is carried out, any picture data
stored in memory is erased.

CLEANING FUSER

This procedure removes excess toner on the OPC
drum.

1. Make sure that paper is loaded in the automatic

feeder.

2. Press Menu, and Self-Test on the one-touch

keypad.

3. Press Enter. The machine automatically pulls in a

sheet of paper, and prints out. The toner particles
on the OPC drum surface is fixed to the paper.

MAKE SHADING

This procedure is needed to set (make) a new
shading reference value. The reference value is
preset at factory. However, when the CIS or the
main board is replaced with new one, the reference
value must be set again.
Load the white, letter-sized paper into the feeder
and perform the test mode (MENU+ONE-TOUCH
04 ‘SYSTEM SETUP’). Follow the next steps as
instructed through the LCD window. After the
shading value is newly set, the shading value
pattern is automatically printed. The shading value
pattern shows the value of the white reference level
of the Contact Image Sensor. Check for the

ROM TEST

This test mode will display and check the current
ROM level in your machine.

FLASH VER. : 1.0.0
ENGINE VER : 1.0.1

DRAM TEST

This test checks the DRAM memory status and
shows if it is functioning properly

PATTERN TEST

1. Pattern Test ?

2. Pattern 1 ? - There are 4 different pattern tests.
Scroll to the options by pressing „or
repeatedly until you find the one you want.

3. Press START key.

4. Key in the number of pages.

5. Press START key.

7-4 Samsung Electronics

Samsung Electronics 7-5

Maintenance & Troubleshooting

SAMPLE OF APROTOCOL DUMP LIST

7-2-3 Maintenance List

A number of reports can be printed from the fax
machine within the test mode. The protocol list and
memory dump list all contain detailed information
which may be required when contacting technical
support.

To printout the pr otocol and memory dump lists:

1. Get into the Tech mode by pressing Menu,#,1,
9,3,4.

2. In Tech mode, pre ss Menu, and ‘ Tx. Confirm’ on

the one-touch keypad.

3. Pr ess „ or repeatedly until you find the
P rotocol Dump List. When you find ‘PROTOCOL
REPORT?’, pr ess ENTER. SAMPLE OF A
PROTOCOL DUMPLIST

7-6 Samsung Electronics

Maintenance & Troubleshooting

7-3 Print Quality

Error Status Check Solution

Vertical black line and band

Vertical white line

No image

Light image

Dark image

Background

Ghost

1. Change Toner cartridge

2. Replace LSU

1. Clean LSU window

2. If not LSU, change Toner cartridge

1. Removing seal tipe

2. Measure the resistance between frame
ground and the ground spring attached
frame. Confirm stable ground. Unless
bad ground, detach cabinet, check where
is bad point

3.Adjust LSU or replace it

4. Normal Dev bias = -300V

5. Shake toner cartridge and print.If a liitke
good, toner is empty

6. Test engine test pattern with DCU,
replace Video board

1. Check and remove tape

2. LSU light power check is difficult.
Compare with new one and check.

3. Check toner and developer counter

4~5. Measure all high voltage output

6. Leakage toner cause bad contact and
increase contact resistance. Clean
contaminated area.

1. Check the rated level and replace

2. Set to power rating

3. Replace defected board

1. Adjust to the rated status

2. Replace Toner cartridge

1. Check every high voltage

2. Check the turn-on PTL, LED crash

3. Clean the inside machine or replace
toner cartridge

1. Bad blade of Toner cartridge

2. LSU

1. LSU window contamination

2. Toner cartridge

1. Seal tape is removed?

2. GND OPC is well grounded?

3. LSU running well?

4. Biss voltage is normal?

5. Lower toner?

6. Is there video data from controller?

1. Check seal tape removing

2. LSU light power normal?

3. Enough toner?

4. High charger voltage?

5. Lower bias voltage

6. Contamination of high voltage
contact

7. Transfer volatge and roller

1. LSU light power normal?

2. Bias voltage output is high?

3. Video data is always supplied?

1. High voltage output is normal?

2. C/R of Toner cartridge is
contaminated?

1. High voltage output

2. Pre-Transfer Lamp

3. Bad high voltage contact

Samsung Electronics 7-7

Maintenance & Troubleshooting

Error Status Check Solution

Stains on back of
paper

Poor Fusing

Partial blank image
(not periodic)

Partial blank image
(periodic)

Different image density
(left and right)

Horizonral band

1. Clean the transfer roller with vaccum
cleaner

2. Clean the area of paper path with cloth
or air cleaner.

3. Remove fuser and replace it

1. Should use recommended paper

2. Check engine controller board.
If you have not thermometer, measure
the thermistor voltage to CPU, If

2.98V±5% in printing CPU works well.
Then, disassemble fuser and check the
thermistor contact and thermistor.

3. Re-check after putting the machine in the
warm place for certain period.

1. Replace Toner cartridge

2. Checkand adjust

1~2. Replace toner cartridge

3. Replace transfer roller

1~2. Change toner cartridge

3. Check left and right spring of transfer
roller and the spring pressing the
developer inside the machine

1. Clean each contact and check good
contact

2. Clean charge roller

3. Replace fuser unit

4. Check engine controller

1. Contamination of transfer roller

2. Stains of paper path

3. Pressure roller’s contamination

1. Use recommended paper?

2. Check fusing temperature

3. The machine was under the low
temperature for a long time?

1. Toner is low?

2. The toner cartridge is out of
position?

1. Develope roller scar or particle

2. Scar or particle (94 mm)

3. Transfer roller scar or particle
(47 mm)

1. Charge roller’s pressure force
unbalance

2. Dev. roller and OPC or Dev. roller
and blade’s pressure force
unbalance

3. Transfer roller’s pressure force
unbalance of each side

1. Unstable high voltage contact

2. Charge roller’s contamination

3. Contamination of heat roller

4. Malfunction of LSU

7-8 Samsung Electronics

Maintenance & Troubleshooting

No Roller Abnormal image period Kind of abnormal image

1 OPC Drum 96.2mm White spot

2 Charge Roller 37.7mm Black spot

3 Supply Roller 31.3mm Horizontal density band

4 Develope Roller 46.1mm Horizontal density band

5 Transfer Roller 47.1mm Black side contamination/transfer fault

6 Heat Roller 56.4mm Black spot, White spot

7 Pressure Roller 56.5mm Black side contamination

Samsung Electronics 7-9

Maintenance & Troubleshooting

No Image