Samsung SF 4700 Troubleshootin

7-1

7. Troubleshooting

7-1 SCANNER

PROBLEM ITEMS TO BE CHECKED HOW TO SOLVE

• Check shading profile.

• Check white Ref. value and black
Ref. value.

• Check CIS signal input level.

• Check shading profile.

• Check if CIS LED is on/off.

• Check white ref.value and black
Ref.value.

• Check CIS signal input level.

• Check shading profile.

• Check printing quality.

• Remake shading profile in the tech mode.

• Replace U27 if it is defective. (white Ref.
=1.3V. black Ref=0V)

• Check if it is 1.3V when operating and 0V
when idle. If defective, replace CIS.

• Remake shading profile in the tech mode.

• Check if CIS harness is pluged.

• If defective, replace U27. (white Ref.=1.3V.
black Ref=0V)

• Check if it is 1.3V when operating and 0V
when idle. If defective, replace CIS.

• Remake shading profile.

• Refer to ‘printing quality.

7-1-1 COPY

PROBLEM ITEMS TO BE CHECKED HOW TO SOLVE

Scanning error

Defective image
quality

White Copy

Black Copy

Defective image
quality

• Check if Printer cable is installed.

• Check if Printer cable is appropriate.

• Check how TWAIN driver is installed.

• Check parallel port I/P part

a

Check the early state of J2 print
signals : #1,10-14,31,32,36.

b

Check U4 input/output signals

c

Check clock signals of U16-43~51,

U16-43~51 U16-53~61

Refer to ‘1,COPY’

• Check if Printer cable is correctly
installed.

• Check if Printer cable is proper for

IEEE1284.

• Reboot the system after TWAIN driver is
installed again.

• Replace the main PBA.

Refer to ‘1.COPY’.

7-1-2 PC-SCAN

Samsung Electronics

7-2

• Refer to User ’s Guide

Troubleshooting

7-1-4 Setting-up Systemm in User Mode

7-1-3 Service Mode

7-1-3-1 HOW TO ENTER SERVICE MODE

In service mode (tech) mode, the technician can check
the machine and perform various test to
isolate the cause of a malfunction.

To enter the service mode, press MENU, #, 1, 9, 3, 4 in
sequence, and the LCD briefly displays ‘T’, the
machine has entered service (tech) mode. While in ser­vice mode, the machine still performs all nor

mal operations. To return to normal user mode, press
MENU, #, 1, 9, 3, 4 in sequence again, or turn the
power off, then on by unplugging and plugging the
power cord.

Options changed while in service mode do not remain
changed unless you clear the machine’s memeory.

SETUP Item Default Status

DATE JAN/01/98 MONTH-DAY- YEAR JAN/01/98
TIME 12:00:00P HOUR-MINUTE- AM/PM 12:00 PM

CARTRIDGE CHANGE

MAINTENANCE CARTRIDGE CLEAN

CARTRIDGE ALIGN
SCANNER INIT

FAX CONFIRM
TRANSMIT LOG

PRINT REPORT RECEIVE LOG

SPEED DIAL LIST
SELF TEST

PAPER SIZE LETTER / A4/LEGAL LETTER

FAX PRINT

LETTER QUALITY/ LETTER QUALITY
DRAFT QUALITY

RINGER VOLUME OFF / LOW/ MEDIUM/ HIGH MEDIUM

SILENT OPERATION NO / YES NO
FAX RECEIVE MODE FAX/TEL/ ANS/FAX/ DRPD FAX
SETUP DRPD LEARN
FAX MEMORY XMIT ON / OFF ON

Samsung Electronics

7-3

Troubleshooting

7-1-5 Setting-up Systemm in Service Mode

SETUP Item Default Status

CIS TEST
AGING TEST SCANNER AGING/

PRINTER AGING
FAX CONFIRM

TRANSMIT LOG
RECEIVE LOG
SPEED DIAL LIST

PRINT REPORT SELF TEST

PROTOCOL DUMP
ASF TEST
SYSTEM DATA

NVRAM DUMP
MAINTENANCE CIS PATTERN
PROGRAM DOWNLOAD
MESSAGE CONFIRM ON/ OFF/ ERR ON-ERROR
AUTO JOURNAL ON/ OFF ON
REMOTE RCV CODE [0-9] 9
DIAL MODE TONE/ PULSE TONE
ECM MODE ON/ OFF ON
AUTO REDUCTION OFF / ON - WITH VERTICAL / ON ON
DISCARD SIZE [00-30] 11
RETRY INTERVAL [1-7] 3
RETRY COUNT [0-2] 2
ANSWER ON RINGS [1-7] 1
RPINT RTI. ON/OFF ON

MODEM TEST?

FSK/ 2400/ 4800/ 7200/ 9600/ 12000/

1400 bps/ 1100/ 1650/ 1850/ 2100 Hz
DTMF TEST?
ROM TEST?
MODEM SPEED ITEM[1-6] 14.4/ 12.96/ 72/ 48/ 24 14.4
SET TX LEVEL [01-15] 12
SET RX LEVEL [40-50] 43
PAUSE TIME [1-9] 3

Samsung Electronics

7-4

Troubleshooting

CIS TEST
It is used to adjust the light of CIS. It is already set at

CIS TEST to get optimum quality.

1. Load All white Document in scanner Unit.

2. Press SETUP.

3. LCD will display ‘CIS TEST PRESS START’.

4. Press START then LCD will display ‘SHADING...’.

5. After scanning, shading waveform is printed out.

6. After shading waveform was printed out, press STOP.

7. Turn OFF system and Turn ON.
<note: COLOR CIS AUTO PEAK TESK>

AGING TEST
SCANNER AGING - Scanner part aging

PRINTER AGING - Printer part aging

PRINT REPORT

1. Press SETUP.

2. Press the MENU button until ‘PRINT REPORT’
displays in the top line of the LCD panel.

3. Press the OPTIONS button to select the log you
want to print.

4. Press the START or SETUP button to print the report.

PROGRAM DOWNLOAD

1. Press SETUP.

2. Press MENU 3 times until LCD will display
‘PROGRAM DOWNLOAD PRESS START’.

3. Press START.

4. Download ROM file from a PC that can be
connected with USB cable.

MESSAGE CONFIRM
A message confirmation report shows whether the

transmission was successful or not, how many pages
were sent, etc.

1. Press SETUP.

2. Press MENU 4 times until LCD will display ‘MES­SAGE CONFIRM. 1. ON 2. OFF 3. ERR’.

3. Press 1 to print a confirmation report automatically
each time you send a fax(ON).
Press 2 to turn this feature off(OFF).
Press 3 to print only when an error occurs and the
transmission was not successful(ERR).

AUTO JOURNAL
A journal shows specific information concerning trans-

mission or reception activities, the time and dates of
up to 40 of the most recent transmissions or receptions.

1. Press SETUP.

2. Press MENU button until ‘AUTO JOURNAL’ dis­plays in the top line of the LCD panel.

3. Press 1 to print journal automatically after every 40
transmissions or receptions (ON). Press 2 to print
journal manually (OFF).

REMOTE RCV CODE
The remote receive code allows you to initiate fax

receive from an extension phone plugged into the EXT
jack. If you pick up the extension phone and hear fax
tones, enter the remote receive code and the fax will
start receiving. The password is preset to 9 at factory.

1. Press SETUP.

2. Press the MENU button until ‘REMOTE RCV
CODE’ displays in the top line of the LCD panel.

3. Enter the desired code 0 to 9 on the number keypad.

DIAL

MODE

Select the type of dial system your fax machine is con­nected to.

1. Press SETUP.

2. Press the MENU button until ‘DIAL MODE’ dis­plays in the top line of the LCD panel.

WARNNING!

Shading profile MUST be made after Downloading a
new Firmware. If not, system will not work properly.

Samsung Electronics

7-5

Troubleshooting

3. Press 1 if the fax machine is connected to a tone
(Touch Tone) dial line.
Press 2 if the fax machine is connected to a
pulse(Rotary) dial line.

ECM MODE (Err

or Correction Mode)

This mode compensates for poor line quality and
ensures accurate, error-free transmission with and
other ECM-equipped facsimile machine. If the line
quality is poor, transmission time may be increased
when ECM is enabled.

1. Press SETUP.

2. Press the MENU button until ‘ECM MODE’ dis­plays in the top line of the LCD panel.

3. Press 1 to turn on the Error Correction Mode.
Press 2 to turn off the Error Correction Mode.

AUTO REDUCTION
When receiving a documents as long as or longer than

the paper installed in your machine, the machine cna
reduce the data in the document to fit into your
recording paper size.
Turn on this feature if you want to reduce an incom­ing page that may otherwise need to be divided into
two pages with only a small portion on the second
page. If the fax machine cannot reduce the data to fit
into one page with the feature enabled, the data is
divided and printed in actual size on two or more
sheets if needed.

1. Press SETUP.

2. Press the MENU button until ‘AUTO REDUCTION’
displays in the top line of the LCD panel.
Press 2 to turn only vertical reduction feature ON.
The machine will reduce an incoming page contains
overflow data only in vertical.
Press 3 to turn this feature on.

DISCARD SIZE
When receiving a document as long as, or longer than,

the paper installed in your fax machine, you can set
the fax machine to discard any excess image at the
bottom of the page to fit into the recording paper size.

If the received page is outside the margin you set, it
will be printed on two sheets of paper at the actual size.

If the data is within the margin, and the AUTO REDUC­TION feature is turned on, it will be reduced to fit into
the appropriate size paper(Discard does not take place).
If the AUTO REDUCTION featur e is turned OFF or
fails, the data within the margin will be discarded.

1. Press SETUP.

2. Press the MENU button until ‘DISCARD SIZE’
displays in the top line of the LCD panel.

3. Enter the length using the number of keypad.

RETRY INTERVAL

1. Press SETUP

2. Press the MENU button until ‘RETRY INTERVAL’
displays in the top line of the LCD panel.

3. Enter the number of minutes (from 1 to 7) using
the number of keypad.

RETRY COUNT

1. Press SETUP.

2. Press the MENU button until ‘RETRY COUNT’ dis­plays in dthe top line of the LCD panel.

3. Enter the number of attempts(from 1 to 2) to redial
the number before giving up.
If you enter 0, the machine will not redial.

ANSWER ON RINGS
You can select the number of times your machine

rings before answering an incoming call. If you are
using your machine as both a telephone and a fax
machine, we suggest you set the ring count to at least
4 to give you time to answer.

1. Press SETUP.

2. Press the MENU button until ‘ANSWER ON
RINGS’ displays in the top line of the LCD panel.

3. Enter a number from 1 through 7 on the number
keypad.

PRINT RTI.
This feature allows the machine to automatically print

the receive terminal ID(if registered), page number,
and the date and time of the reception at the bottom
of each page of a received document.

1. Press SETUP.

2. Press the MENU button until ‘PRINT RTI.’ displays
in the top line of the LCD panel.

3. Press 1 to print RTI, otherwise press 2.

MODEM TEST
The modem will send various transmit signals on the

telephone line you cna check the following:

- FSK

- Tones : 1100Hz, 1650Hz, 1850Hz, 2100Hz

- G3 training : 14400, 12000, 9600, 7200, 4800, 2400 bps

1. Press SETUP.

2. Press the MENU button until ‘MODEM TEST?’ dis­plays in the top line of the LCD panel.

DTMF TEST
DTMF(Dual Tone Multiple Frequency) signal can be

checked.

-1,2,3,4,5,6,7,8,9,0,*,#

1. Press SETUP.

2. Press the MENU button until ‘DTMF TEST ?’ dis­plays in the top line of the LCD panel.

Samsung Electronics

7-6

ROM TEST
Display rom version and checksum.

1. Press SETUP.

2. Press the MENU button until ‘ROM TEST ?’ dis­plays in the top line of the LCD panel.

3. Press START or SETUP.

MODEM SPEED
Default=14400 bps

Select baud rate of 14400, 12000, 9600, 7200, 4800 ro
2400 bps. The lower the baud rate, the larger the
acceptable error rate. T30 protocol has a fixed speed of
300 bps in the protocol mode. When the TX speed is
set to 14400 or 12000 bps, the RX speed will be either
V.17 or V.33. When the Tx speed is set to 9600 or 7200
bps, the RX speed will be either V.29 or V.27 ter. When
the TX speed is set to 4800 or 2400 bps, the RX speed
will be V.27 ter.

1. Press SETUP.

2. Press the MENU until ‘MODEM SPEED ITEM[1-6]’
displays in the top line of the LCD panel.

3. Enter a number from 1 through 6 on the number
keypad.

SET TX LEVEL
Default=12 dBm

Fcc requires that the transmission level be less than -9
dBm. From -9 dBm to -15 dBm is acceptable You cna
set the transmission level between 0 and -15 dBm in 1

dBm steps using the control panel keypad. Accuracy
is +0/-3 dBm

1. Press SETUP.

2. Press the MENU until ‘SET TX LEVEL’ displays in
the top line of the LCD panel.

3. Enter a number from 01 through 15 on the number
keypad.

SET RX LEVEL
Default=-43 dBm

Reception level may be too low due cable losses. If
set to -43 dBm, reception sensitivity will be between 0
and -43 dBm.

1. Press SETUP.

2. Press the MENU until ‘SET RX LEVEL’ displays in

the top line of the LCD panel.

3. Enter a number from 40 through 50 on the number

keypad.

PAUSE TIME
Default=3.0 dBm

This sets the length of the pause time from 1 through
9 seconds, when the pause button is pressed.

1. Press SETUP.

2. Press the MENU until ‘PAUSE TIME’ displays in

the top line of the LCD panel.

3. Enter a number from 01 through 9 on the number

keypad.

Troubleshooting

7-2 FAX/TELEPHONE Precautions

PROBLEM ITEMS TO BE CHECKED HOW TO SOLVE

TEL LINE CANNOT
BE ENGAGED (NO
DIAL TONE)

Cannot MF dial.

MF dial is possible
but not DP dial.

• When you press “OHD” key:

a

Check line cord connection.

b

Check CN12-6(main PBA), main
LIU harness, and P1-6(LIU
PBA),(“low”)

c

Check relaying operation of LIU
PBA : Is the control signal of
U29-49(main) high?

• Check CN12-3(main PBA), main-LIU
harness, and P1-3(LIU PBA)

• Check DP control signal at CN12-10

(Main) and PIL10 (LIU PBA)

• Check DP control signal at Q6, U6

and Q2.

• aInsert it correctly into the connection
jack called “line”.

b

Replace defective parts if level is high.

c

Replace main PBA IF the control signal
of U18-49(main) is low. Replace LIU
PBA if high but phone line cannot be
connected.

• Replace defective parts.

• Replace defective parts.

• Replace LIU PBA.

Samsung Electronics

7-7

Troubleshooting

7-3 Paper Feed

PROBLEM ITEMS TO BE CHECKED HOW TO SOLVE

ASF feeds paper
but paper is not
supplied to the
engine.

ASF cannot feed
paper.

Tilted Printing

• Check if actuator feed operates
perfectly .

• Check if pick up roller operates
perfectly .

• Check if too much paper has been
supplied.

• Check if paper guide of the ASF is
adjusted to the size of paper.

• Replace actuator-feed, spring, or other
defective parts.

• Replace pick up roller assembly.

• Supply appropriate amount of paper(100
sheets of normal copying paper).

• Adjust paper guide to the size of paper.

* ASF: Automatic Sheet Feeder

PROBLEM ITEMS TO BE CHECKED HOW TO SOLVE

Defective fax
transmission

Defective automatic
fax reception

• Check CN12-1,3(main PBA), main LIU
harness, and P1-1,3(LIU PBA).

•

1)

Is the external phone hooked off?

2)

Is the output of U2-4(LIU PBA) low?

• Check ‘hook off’. : Refer to ‘TEL LINE
CANNOT BE ENGAGED’ above.

• Check transmission path.: Check
output of U37-44(main PBA) and input
of T2-3(LIU PBA).

• Check reception path.: Check output
of T2-3(LIU PBA) and input of
U37-45(main PBA).

• Is the ring checked?
Check ring pattern at CN12-8(main
PBA).

• Refer to ‘Defective Transmission’.

• Replace defective parts.

• 1)Hook on the external phone correctly.

2)

Replace LIU PBA if low.

• Refer to ‘TEL LINE CANNOT BE
ENGAGED’ above.

• Replace main PBA, if abnormal.

• Replace LIU PBA if the output of
T2-3(LIU PBA) is not confirmed.
Check the circuit around U40,U39(main
PBA) if the input of U37-45(main PBA) is
not confirmed though the output of
T2-3(LIU PBA) is confirmed.

• Replace LIU PBA if it cannot be checked.

(constant high)

• Refer to ‘Defective Transmission’.

Samsung Electronics

7-8

Troubleshooting

7-4. Printing Quality

7-4-1 White lines on letters or graphics.

Cause
If nozzles in print head has a problem, white lines are
marked on the print.

‘CARTRIDGE MAINT’ will let you know if nozzles
have fallen problems.

Solution

1) Run ‘print control panel’ to “clean print nozzles”
and check if nozzles have been blocked.

2) Wipe with soft cloth the contact surfaces of ink car­tridge and carriage, and check if nozzles have been
cleaned properly.

3) Separate ink cartridge from carriage and combine
them. Repeat it about 5 to 6 times and check if con­nection is proper.

4) Replace ink cartridge and check whether there’s a
problem with thehead.

5) Check if head cable is inserted well into the main
circuit board and then check if nozzles have prob­lems.

6) Check if head cable is broken or torn and then
check if nozzles have problems.

7) Replace the main circuit board with a new one and
check if nozzles have problems.

If this line is broken, it confirms that
nozzles have problems.

Samsung Electronics

7-9

Troubleshooting

7-4-2 When Vertical lines are printed

crookedly

Cause : Vertical lines are printed crookedly if you do

not “align Vertical lines” on the printer.

Solution

1) Run print control panel to “align Cartridges”.

2) Select the best one of the above samples and enter
the number.

3) This function to align Vertical lines is available both
for mono and color cartridges.

7-4-3 When ink spreads on transparent film

Cause : You selected a wrong medium on the

driver or you did not use transparent film
designated for inkjet.

Solution

1) Use only transparent film designated for inkjet
when you print on transparent film by an inkjet
printer .

2) Run “Windows driver” and select “transparency”
as the kind of paper if you print on Windows.

Samsung Electronics

7-10

Troubleshooting

7-5. Defective Operation

PROBLEM ITEMS TO BE CHECKED HOW TO SOLVE

LCD does not
display
(operation panel)

Cannot enter by
keys(operation
panel)

LF MOTOR does
not operate.

CR MOTOR does
not operate.

TX MOTOR does
not operate.

Paper Jam

• Powered up?

• VCC(+5v) M+4.5V?

• Is the level of U26-130(_POR) high
(more than +4V)?

• Check Main to OPE harness and
J1(main).

• Is the level of U26-153 (_RST_OUT)
high (more than +4V)?

• Is the level of U26-154 (_OPE_RST)
high (more than +4V)?

• Check control signals of U26-123,
124(OPE_TXD, OPE_RXD).

• Refer to 8-5 of “LCD does not
display”.

• Check OPE key contacts.

• Check the control signals of
U26-39~44.

• Check input signals (DIR, PWM) and
driving output of U24 and U20.

• Check the control signals of U26­31~36.

• Check input signals(DIR, PWM) and
driving output of U13.

• Check the operation of the document
sensor of OPE PBA.

• Check the operation of TX Motor.

a

Check the control signals of U29­105~108.

b

Check input signals and driving
output of U17.

• Check sheet feeder and ejector.

• Check the operation of LF motor.

• Check paper exit sensor.

• Check power.(SMPS)

a

Check if the cord is connected.

b

Check each power channel. (+5V,
+11.75V, +30V)

• Check power harness.

• Check the circuit around U22.

• Replace defective parts.

• Check the state of data bus of U26.:
Replace the main PBA.

• Check the circuit around U29.

• If signals of OPE_TXD are defective,
replace the main PBA. If signals of
OPE_RXD is defective, replace OPE
PBA.(Refer to circuit explanation.

• Refer to 8-5 of “LCD does not display”.

• Replace OPE.

• If control signals are not made when the
other functions are normal, replace the
main PBA.

• If driving output is defective when input
signals are normal, replace U24 and
U20.

• If control signals are not made when the
other functions are normal, replace the
main PBA.

• If driving output is defective when input
signals are normal, replace U13.

• If defective, replace the sensor.

•

a

If control signals are not made when
the other functions are normal, replace
the main PBA

b

If driving output is defective when the
other functions are normal, replace
U17.

• Get rid of jammed paper.

• Refer to “LF motor does not operate.”

• If the sensor senses paper exit when it
operates normally, replace the main
PBA.

Samsung Electronics

7-11

Troubleshooting

1-2 ESD Precautions

PROBLEM ITEMS TO BE CHECKED HOW TO SOLVE

CLR DOCUMENT
JAM

ADD PAPPER

LOAD DOCUMENT

CHECK
CARTRIDGE

Can’t PRINT

• Check document feeder.

• Check the operation of TX motor.

1)

Check the control signals of U29­105~108.

2)

Check the input signals and driving
output of U17 and U11.

• Paper Empty?

• No document?

• Check the document sensor of OPE
PBA.

• Check if ink cartridge is defective.

• Check the output level of U23-13.

• Check USB cable connection.

• Check what type of print driver has
been installed.

• Check I/F part of USB.

1)

Check the initial state of print con-

trol signal of CN13 : pin 1, 2, 3, 4

2)

Check the signal of U43-27 (/USB_INT).

3)

Check signals of U43-29 and U43-

31.

• Remove jammed documents and insert it
again.

• 1)If control signals are not made when

other functions are normal, replace the
main PBA

2)

If driving output is defective when
input signals are normal, replace U17.

• Feed paper.

• Refer to 8-5 of “Paper Jam”.

• Insert documents.

• If high, replace the document sensor. If
low, replace the OPE PBA.

• Replace ink cartridge.

• If low, replace the main PBA.

• Connect it correctly, and when connected
there should be a inkjet pointes item

displayed in a USB port section of a
computer system information.

• Install the print driver again and reboot
the system.

• Replace the main PBA.

Samsung Electronics

7-12

Troubleshooting

MEMO

Samsung Electronics