samsung SF110T Service Manual

2 Specification

2-1 Transmitter

Parameter

Normal

Document Size

Document Thickness Scan Line Length Effective Scanning Width Scanning Method

Resolution

Max. Min.

Horizontal A4 Vertical Horizontal Vertical Horizontal

Vertical

21Ox297mm 216xl500mm

l52x76mm

0.085 x 0.115 mm

208 mm

Flat-bed scanning using CIS Stepping motor

203

Standard: Fine: Super Fine: 15.4 lines/mm (392 lines/in)

Specification

paper,1

728 scan elements along 216 line length

pels/in

(8 dots/mm)

3.85 lines/mm (98 lines/in)

7.7 lines/mm (196 lines/in)

2-2 Receiver

Parameter Coding Scheme Recording Paper Size Effective Recording Width Recording Method

Horizontal

Resolution

Vertical

Specification MH (Modified 216 mm x 30 m, core 12.7 mm diametre 208 mm Solid state Thermal Printing Head 8 dots/mm (203 Standard:

Fine:

Super Fine: 15.4 lines/mm (392 lines/in)

Huffman)

pels/in)

3.85 lines/mm (98 lines/in)

7.7 lines/mm (196 lines/in)

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Electronics

2-l

Specifications

2-3 Line Control Block

Parameter Communication Facility Line Coupling Transmission Speed Modem

Carrier Frequency

Control Signal

Output Level

Input Sensitivity Input & Output Impedance

Specification Public Switched Telephone Network (PSTN) Direct 9600,7200,4800,2400 bps QAM, DPSK and FSK (V.29,

V.27ter

with fall back function and V.21)

1700 Hz

1800 Hz

(9600/7200 (4800/2400

bps) bps)

1100 Hz (CNG) 2100 Hz (CED) 300 bps (FSK) 0

dBm

to - 15

to - 43

dBm

+O.O / -3

dBm

and -5

dBm,

dBm

adjustable in 1 dB steps

to -48

dBm

600 ohm + 30%

2-4 Others

Parameter Dialling Signal Dialling Method Memory Capacity Power Requirement

Power Consumption

Temperature

Relative Humidity

Dimension

Stand-by In use

Width

Height

Weight

Specification DP/DTMF Memory dialling, Redialling

1 5

memory dial (power on)

Check power label attached near the power cord connection.

7 Watt Max. 115 Watt

50to95”F (lO”Cto35”C) 20

to 80 % RH (Non-Condensing)

290 mm (11.4 in)

245 mm (9.64 in)

109 mm (4.29 in)

3.0 kg

2-2 Samsung

Electronics

Operating Instructions

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 service mode, press MENU, confirm that the machine has entered service (tech) mode. While in service mode, the machine still performs all normal operations. To return to normal user mode, press ‘MENU, the power switch off, then on by plugging the power cord out, then in.

Options changed while in service mode do not remain changed, unless you first clear machine memory.

#, 1,9,3,4

in sequence, and ‘TECH’ will be displayed in the LCD to

#, 1,9,3,4’

in sequence again, or turn

3-2 Changing Options

3-2-l Selectable Options

GRAY SCALE LEVEL REMOTE RECEIVE CODE

Choose either 16 or 32 gaey scale levels. The

selected level is also used in the photo sending mode. If you select 32 levels, transmission time is longer, however the result at the receiving end will

be superior. This mode works only when the

remote machine is capable of super-fine mode.

CONFIRMATION REPORT PRINTOUT

This code can be used only with a phone extension connected to the FAX machine. The user can initiate FAX receive mode by entering a remote

receiving code on the extension phone. The code is

factory preset to * 9 *

be changed to any digit between 0 and 9.

AUTO

IOURNAL

and the middle digit may

Select whether a confirmation report prints each

time a user sends a fax.

YES: The machine prints out the report

automatically after each fax sent.

ERROR : The machine prints a report only when

there is an error.

NO: The machine does not print the report

automatically. User can print the list on demand.

RING BEFORE ANSWER

Select the number of rings the machine allows

before it answers a call in automatic receiving

mode.

The fax machine prints the TX/RX journal automatically after every 50 fax sessions.

MODEM SPEED

Select baud rate of 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 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.

9600,7200,4800,

or 2400 bps.

Samsung Electronics

3-1

Operating Instructions

CALL TRANSFERRING This

feature allows the fax machine to transfer incoming caller’s message to a specified remote location.

Choose YES to turn on this feature. The LCD display asks to enter the telephone number you want to be transferred. Choose NO to turn off the feature.

CALL MONITORING

This

feature enables you to hear callers leaving

messages on the machine.

Choose YES to turn on this feature. Choose NO to turn off this feature.

CHARGE SAVER

This feature lets the user dial into this machine

from a remote phone and check whether anyone has left a message without being charged for a charge call. When charge saver is on and there are messages waiting to be heard, the machine answers on the number of rings you specify in the ring count option. If there are no messages, the machine answers on the second ring after the

number specified. This gives the user time to hang

up the phone before the machine answers saves the price of the call.

and

REMOTE PASSWORD

You

can change the three-character password used to access your machine from a remote phone. The password is preset to nine pound) at the factory. The first and the last #‘s

are fixed, but you can change the middle

numbers from 0 to 9. The machine doesn’t accept

double character codes (ex 119,229 etc.) as passwords, because line conditions can occasionally make the machine fail to recognize a double digit code.

Enter the characters you want to use, then press START.

BATTERY ALARM

You can turn on the battery alarm feature. With this feature on, the machine displays the low battery message in the LCD and sounds beeps to alert you low battery condition.

Choose YES to turn on the battery alarm feature. Choose NO to turn off the battery alarm feature.

CHECK BATTERY

If you want to check the remains of the battery, press START button. The machine displays the remaining capacity of the battery in the LCD.

“#139#”

(pound one three

(

Choose YES to turn on charge saver. Choose NO to turn off charge saver.

MESSAGE RECORDING TIME

You can select the maximum time allowed for caller messages and memos.

If you choose YES, the LCD display shows you the

time limits available seconds or 90 seconds. Choose the proper time. If you choose 0, it allows callers to hear the greeting message but doesn’t permit them to leave messages.

3-2

0 second, 30 seconds, 60

LINE MONITOR

You can hear line signals through a tone speaker. The volume is adjustable.

Choose YES to monitor the line signal. Choose NO to turn off this feature. Speaker will be active only for dialing, the starting part of the phase B of CCITT, and key tones.

TRANSMISSION LEVEL

You can set the transmission level to between

0 and -15 dBm in 1 panel keypad. Accuracy is + 0 /-3 dBm.

steps using the control

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Electronics

Operating instructions

RECEPTION LEVEL

Reception level may be too low due to cable losses. If set to -43 dBm, reception sensitivity will be between 0 and -43 If set to between -5 and -48

CABLE EOUALISZR

Copper telephone wire attenuates low frequencies less than high frequencies. The longer a cable is,

the more pronounced the effect. To compensate for this attenuation you may need to set the machine to match the cable length currently used. Select short or long.

BUSY ON DROP OUT TIME

While checking busy on time, if any signal noise is detected, the machine will ignore the signal noise unless it is greater than a specified time.

-48

dBm, reception sensitivity will be

dBm.

RING ON CHECK TIME

The machine must receive a ring signal with a specified active time from a telephone exchange in automatic reception mode. In this case, the detection time that the machine agrees to be valid the

inputed option. If the activation time of ring signal is below of the set value of the ring on check time, the machine can not detect this ring signal.

RING OFF CHECK TIME

The machine have to receive a ring signal with

specified inactive time as well as active time. This option is able to change the inactive time. If the inactive time of ring signal is above of the set value of the ring off check time and below of the set value of the “ring check maximum time”, the machine can detect this ring signal off

(Ol-99,1=10

RING CHECK MAXIMUM TIME

ring signal is changeable by this

msec)

BUSY OFF DROP OUT TIME

While checking busy off time, if any signal noise is

detected, the machine will ignore the signal noise unless it is greater than a specified time.

FLASH TIME

This feature allows you to change the flash time.

BUSY TONE DETECTION LEVEL

While checking tone in ANS/FAX mode, If any

signal which is great than set level is detected for a few seconds the machine will disconnect the line.

PAUSE TIME

Adjust the period of pause time to wait for a second dial tone in a PABX or mobile paging

set

to 9

system. You can adjust the time from 1

to 9).

set

This option is able to change the inactive maximum time. If the inactive time of ring signal

is above of the set value of the “ring off check time” and below off the set value of the ring check maximum time, the machine can detect this ring signal off. If the time is above of the set value of the ring check maximum time the previous ring counter is cleared. (Ol-99,1=100

msec)

3-2-2 Changing Options

Press MENU, 3, START/COPY in sequence. Press

)

or 4 to select the desired option item. When

the desired option item appears, press START and

)

or 4 to change the status of a selected

use function.

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3-3

Operating Instructions

3-3 Test Mode

Test mode is used to test machine functions. To enter test mode, press MENU, 0, START/COPY buttons in sequence.

TPH TEST

You can print a TPH test pattern and check the heating element of TPH with this test pattern. Figure 3-1 is a sample test pattern.

Figure 3-l : TPH Test Pattern

CIS TEST

You can check the scanning elements of the CIS (Contact Image Sensor) and print a shading waveform graphically with dots. The graph waveform will resemble figure 3-2, below.

CIS

TEST

3-4

Figure 3-2: CIS Shading Waveform

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Electronics

Operating instructions

MODEM TEST

The modem will send various transmit signals on the telephone line. You can check the following:

ROM TEST

Tests machine ROM (Read Only Memory). The result and the software version appear in the LCD in the following format:

FSK test

l tones: 1100 Hz, 1650 Hz, 1850 Hz, 2100 Hz l G3 training:

9600,7200,4800,2400

bps

CHKSUM= XX, VXX, OK

MEMORY CLEAR

Erases contents of RAM. When memory is cleared, the machine returns to default settings.

3-4 Report Printout

A number of useful reports can be printed in service mode. One of these lists is the protocol list, which

contains detailed information which may be required when contacting technical support. To print this list, press MENU, 4, START/COPY in sequence.

When a report name appears in the display, scroll through the list of reports by pressing ) or 4. When a desired report is selected, press START/COPY.

CONFIRMATION REPORT

Shows the last transmission result.

SYSTEM DATA LIST

Shows all options that were set in user mode and service mode.

VOICE STATUS REPORT

PROTOCOL LIST

Shows the status of the recorded voice messages.

This list is available in the service mode only, and shows the sequence of the CCITT group 3 T.30

TRANSMISSION TOURNAL

protocol during the most recent TX or RX operation. You can check for send and receive

Shows information about faxes sent.

errors with this list. If a communication error occurs while the machine

RECEPTION TOURNAL

is in service mode, the protocol list will print automatically.

Shows information about faxes received.

HELP LIST

TELEPHONE NUMBER LIST

This report illustrates the machine’s basic

Lists all numbers stored in the machine’s touch and speed dialling memory.

one-

functions and commands. Use as a quick reference guide.

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Electronics

3-5

Operating instructions

3-5 LCD Display

3-5-l During communication

In user mode, the LCD shows the remote machine’s TTI number, communication type,

(send or receive), and page number.

In service mode, the display shows the communication type, abbreviations for the CCITT Group 3 T.30 protocol as they occur, the protocol type

(G3),

coding type

and line time.

(MH),

baud rate in kbps,

3-5-2 If a communication problem

occurs:

In user mode, the display shows one of the following reasons: PAPER JAM, SEND ERROR, or RECEIVE ERROR.

In service mode, the display shows all error messages available in user mode, as well as additional error messages not available in user mode.

Error messages shown in service mode only are as follows:

IRE-MESSAGE ERROR: problem occurred during phase B of session

MESSAGE ERROR: problem occurred during phase C of session

POST-MESSAGE ERROR: problem occurred during phase D of session

LINE ERROR: machine cannot connect or has lost connection with the remote machine

Additional messages, not shown above, will appear in the transmission and reception journals printed in service mode.

3-6

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4. Disassembl

and Reassembly

Note: Make sure power is OFF, and unplug the power cord from the wall outlet.

4-1 Handset

l Disconnect the handset cord modular plug from

the machine.

l Remove the two rubber dummies from the

holes and loosen the two screws.

l Push the upper cover in the direction of arrow

to remove.

Figure 4-l

4-2 TX Guide & White Roller

Open the operation unit assembly.

Disengage the stopper.

Remove TX guide.

Remove white roller.

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4-l

Disassembly Instruction

4-3. Top Cover

l Loosen the six screws fastening the top cover.

l Carefully lift the top cover as shown in the

direction of the arrow.

Figure 4-3

4-4. QPE Unit

l Disconnect the harnesses from the Main PBA.

l Loosen the two screws fastening the Main PBA.

l Disconnect the harnesses from the LIU PBA.

Remove the OPE unit from the base unit.

Figure 4-4

4-2

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4-4-l. OPE Cover

l Loosen the seven screws fastening the OPE

unit.

l Carefully lift the OPE cover in the direction of

the arrow as shown.

Disassembly Instruction

4-5. Main Frame

Loosen the screw fastening the power supply and earth harness.

Loosen the five screws fastening the main frame assembly.

Lift the main frame assembly and D.DET sensor PBA.

Figure 4-5

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Figure 4-6

4-3

Disassembly Instruction

4-6. LIU PBA & POWER SUPPLY

l Loosen the six screws fastening the LIU PBA

and Power Supply unit.

l Lift the LIU PBA and Power Supply unit.

Figure 4-7

4-4

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Electronics

Circui

5-I

General

The main circuit board consists of memory, MODEM, TX- and RX-related circuitry, TAD, and the Integrated Facsimile Controller (IFC), which includes the CPU and I/O device drivers and controls the system.

5-2 IFC

This circuit consists of the data and address bus, real time clock (RTC), image sensor, motor driver

controller, Thermal Print head controller, IFC including I/O port, and system reset circuit.

5-2-l Memory Map

The external memory of the CPU is divided into 32kB RAM (OOOOH through (FFOOOOH through FFFFFFH).

FFFFFF

SOOOH)

and 64kB ROM

,,*’

,,**

.*’

,*’

se’

,*’

OOFEFF OOFEEO

OOFE80

FOOOOO

OFFFFF

ROMcsn

Not

Available

CSOn

OOFEOO

OOFDFF OOFDCO

OOFD80

OOFDOO

OOFBFF OOFBEO

OOFBDO OOFBCO

DitherTable

OOFB80

Samsung

Electronics

Figure 5-1: XFC Memory Map

5-1

Circuit Description

5-2-2 Data & Address Bus Control

/RD

and

/WR

signals are active in the low state, with TSTCLK high, and an internal wait state occurs in the TSTCLK (6 MHz). These signals are sent to the and the MODEM in order to read or write data when a chip select line is active.

/CSO: /ROMCS: /MCS:

DO -

A0 -

A19: address bus

/RD

and

/WR

ports of RAM, ROM,

RAM chip select active (low)

ROM chip select active (low)

MODEM chip select active (low)

D7:

8 bit data bus

OPERATOR

PANEL

SERIAL

COMMUNICATION

TXD

RXD

5-2-3

System Clock

The 6 MHz internal clock frequency is generated by dividing the 12 MHz system clock from MODEM by two inside the MODEM.

RTC

CRYSTAL

PRINTER

DATA

CONTROL

AND

SENSORS

MOTOR

DRIVER

(MOTOR)

SCANNER CONTROL

AND

PROCESSING

STB O-3

PDAT

PCLK PLAT

THADI

SM o-3

MOTOR POS

START

SCLK

VIDCTLl

H/B

Vin

+Vref

-Vref

IFC(XFC-B)

IROMCS IRAMCS

lRD/WR

DO-D7

ZkFJ

REST0

/BATRST

J *

EXTERNAL

BUS

MoDEM

GENERAL PURPOSE

Figure 5-2: XFC Hardware Interface Signals

Samsung

Electronics

Circuit Description

5-2-4 Real Time Clock (RTC)

This circuit receives clock pulses from an external

32.768

kHz

crystal, which it divides into hours,

32768 KHz

BUSY FLAG CLEAR

15 BIT

PRESCALER

)

DAYS

1Hz

BUSY

DETECT

CO=28,29,

30,0r 31

MONTH

DECODER

SECONDS

6 BIT

BUSY FLAG

MONTHS

minutes, seconds, year, month, and day.

A battery maintains operation when power is off. XFC-B can up-track 32 years, beginning with 1992.

CO=6!J m[

CO=“I,“,aI

CO=24,

4 BIT

co=12

5 BIT

YEARS

I I

3 STATE

DRIVER

Figure 5-3: RTC Block Diagram

5-2-5 Print Control

The PCLK and PDAT signals synchronise serial print data to the TPH. PLAT latches TPH serial print data to the TPH from a shift register through PDAT. STBl - STB4 enable TPH printing in four

sequential intervals.

Cmd

PrintLine

(MSINT Caty-out)

Shift Data

Shift Clk

Sh D Sh C

This

system has a lOms/Line printing format and

determines

SIB

High/Low enable status

according to the STBPOL signal.

Cmd

l-l

Sh D

Sh C

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STBl

STB2

Electronics

Figure 5-4: Printer Timing

5-3

Circuit Description

5-2-6 TPH A/D Converter

The ADC is composed of a 6 bit DAC, comparator,

filter, and 9 bit up/down counter. The 6 MSBs of the 9 bit counter generate a reference signal to the comparator. TPH temperature or DTAD back-up voltage is sensed by comparing DAC output

THDI-

voltage to the comparator with the thermistor input voltage (THDI), which originates as an output signal from the TPH. It then supplies the proper strobe pulse to the TPH. The thermistor input voltage (THDI) operates within a range of 1 to 4v.

Figure 5-5: ADC Block Diagram

Battery

THDl

I I I

GND5

Approximate values (TPH Temperature) of R28 and R29 can be calculated from the following formulas:

R28 = 0.25 x (R29 x Rth R29 = (15Rth

(Tl)

(Tl)} /

(R29 + Rth

x Rth (T2)) / {Rth

(Tl)}

(Tl)

-16Rth (T2))

Where Tl = minimum temperature, T2 = maximum temperature.

5-4

Figure 5-6: THD Connection Circuit

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5-2-7 Operation Panel Control

Communication

A Synchronous/Asynchronous Receiver/Transmitter transmission between the main circuit board and

the operator panel.

(SART)

CPU Bus

controls serial data

SARTCmd

-I

Circuit Description

SCLK

RXD

0 Internal Register

Figure 5-7: SART Block Diagram

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5-5

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