Samsung SF11OT Building instructions

FACSIMILE
SF1 IOT
- sEF?vlcE Manua’-
1. Precautions
2. Specification
3. Operating Instructions
4. Disassembly and Reassembly
5. Circuit Description
6. Troubleshooting
7. Exploded Views and Parts List
8. Electrical Parts List
9. PCB Diagrams
10. Block Diagram
11. Wiring Diagram
12. Schematic Diagrams

1 Precautions
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Follow these safety, ESD, and servicing precautions to prevent personal injury and equipment damage.
l-l Safety Precautions
3.
4.
5
6.
Be sure that all built-in protective devices are
in place. Restore any missing protective
shields.
Make sure there are no cabinet openings
through which people- particularly children-
might insert fingers or objects and contact
dangerous voltages.
When re-installing chassis and assemblies, be
sure to restore all protective devices, including
control knobs and compartment covers.
Design Alteration Warning:
Never alter or add to the mechanical or
electrical design of this equipment, such as
auxiliary connectors, etc. Such alterations and
modifications will void the manufacturer’s
warranty.
Components, parts, and wiring that appear to
have overheated or are otherwise damaged
should be replaced with parts which meet the
original specifications. Always determine the
cause of damage or overheating, and correct
any potential hazards.
Observe the original lead dress, especially near
sharp edges, AC, and high voltage power
supplies. Always inspect for pinched, out-of-
place, or frayed wiring. Do not change the
spacing between components and the printed
circuit board.
7.
Product Safety Notice:
Some electrical and mechanical parts have
special safety-related characteristics which
might not be obvious from visual inspection.
These safety features and the protection they
provide could be lost if a replacement
component differs from the original. This
holds true, even though the replacement may
be rated for higher voltage, wattage, etc.
Components critical for safety are indicated in
the parts list with symbols A A . Use only
replacement components that have the same
ratings, especially for flame resistance and
dielectric specifications. A replacement part
that does not have the same safety
characteristics as the original may create
shock, fire, or other safety hazards.
Samsung Electronics l-l

Precautions
1-2 ESD Precautions
Certain semiconductor devices can be easily
damaged by static electricity. Such components are
commonly called “Electrostatically Sensitive (ES)
Devices”, or ESDs. Examples of typical ESDs are:
integrated circuits, some field effect transistors,
and semiconductor “chip” components.
The techniques outlined below should be followed
to help reduce the incidence of component damage
caused by static electricity.
CAUTION: Be sure no power is applied to the
chassis or circuit, and observe all other
safety precautions.
1.
2.
3.
Immediately before handling a semiconductor
component or semiconductor-equipped
assembly, drain off any electrostatic charge on
your body by touching a known earth ground.
Alternatively, employ a commercially
available wrist strap device, which should be
removed for your personal safety reasons prior fo
applying power fo the unit under fesf.
After removing an electrical assembly
equipped with ESDs, place the assembly on a
conductive surface, such as aluminum or
copper foil, or conductive foam, to prevent
electrostatic charge buildup in the vicinity of
the assembly.
Use only a grounded-tip soldering iron to
solder or desolder ESDs.
I-3 Lithium Battery Precautions
4.
5.
6.
7.
8.
9.
Use only an “anti-static” solder removal device.
Some solder removal devices not classified as
“anti-static” can generate electrical charges
sufficient to damage ESDs.
Do not use Freon-propelled chemicals. When
sprayed, these can generate electrical charges
sufficient to damage ESDs.
Do not remove a replacement ESD from its
protective packaging until immediately before
installing it. Most replacement ESDs are
packaged with all leads shorted together by
conductive foam, aluminum foil, or a
comparable conductive material.
Immediately before removing the protective
shorting material from the leads of a
replacement ESD, touch the protective material
to the chassis or circuit assembly into which
the device will be installed.
Maintain continuous electrical contact between
the ESD and the assembly into which it will be
installed, until completely plugged or soldered
into the circuit.
Minimize bodily motions when handling
unpackaged replacement ESDs. Normal
motions, such as the brushing together of
clothing fabric and lifting one’s foot from a
carpeted floor, can generate static electricity
sufficient to damage an ESD.
1. Exercise caution when replacing a Lithium
3. Lithium batteries contain toxic substances and
battery. There could be a danger of explosion should not be opened, crushed, or burned for
and subsequent operator injury and/or
disposal.
equipment damage if incorrectly installed.
2. Be sure to replace the battery with the same or
equivalent type recommended by the
manufacturer.
1-2
Samsung Electronics

2 Specification
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2-1 Transmitter
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Parameter Specification
1 Normal
2lOx297mm
Document Size
Max. 216
x 1500 mm
Min. l52x76mm
, I I
Document Thickness
Scan Line Length
Effective Scanning Width
Scanning Method
Resolution
0.085 x 0.115 mm
Horizontal
A4 paper,1 728 scan elements along 216 line length
Vertical 208 mm
Horizontal Flat-bed scanning using CIS
Vertical Stepping motor
Horizontal 203 pels/in (8 dots/mm)
Standard: 3.85
lines/mm (98 lines/in)
Vertical Fine:
7.7 lines/mm (196 lines/in)
Super Fine: 15.4 lines/mm (392 lines/in)
2-2 Receiver
Parameter Specification
Coding Scheme
MH (Modified Huffman)
Recording Paper Size 216
mm x 30 m, core 12.7 mm diametre
Effective Recording Width 208 mm
Recording Method Solid state Thermal Printing Head
Horizontal 8 dots/mm (203 pels/in)
Standard:
Resolution 3.85
lines/mm (98 lines/in)
Vertical Fine:
7.7 lines/mm (196 lines/in)
Suoer Fine: 15.4 lines/mm (392 lines/in)
Samsung Electronics
2-l

Specifications
2-3 Line Control Block
Parameter Specification
Communication Facility Public Switched Telephone Network
(PSTN)
Line Coupling
Transmission Speed
Modem
Carrier Frequency
Direct
9600,7200,4800,2400 bps
QAM, DPSK and FSK
1 (V.29, V.27ter with fall back function and V.21)
I
1 1700 Hz (9600/7200 bps)
1 1800 Hz (4800/2400 bps)
Control Sianal
1 1100 Hz (CNG)
Output Level
Input Sensitivity
Input & Output Impedance
2100 Hz (CED)
300 bps (FSK)
0 dBm to - 15 dBm +O.O I-3 dBm, adjustable in 1 dB steps
0 dBm to - 43 dBm and -5 dBm to -48 dBm
600 ohm f 30%
2-4 Others
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Parameter Specification
Dialling Signal
Dialling Method
Memory Capacity
Power Requirement
DP/DTMF
Memory dialling, Redialling
5 memory dial (power on)
Check power label attached near the power cord connection.
Power Consumption
1
Stand-by
7 Watt
In use Max. 115 Watt
( Temperature
150to95”F (lO”Cto35”C)
1 Relative Humidity I20 to 80 % RH (Non-Condensing)
1 Width 1 290 mm (11.4 in)
I
Dimension
Depth
Height
Weight
245 mm (9.64 in)
109 mm (4.29 in)
3.0 kg
2-2 Samsung Electronics

3. Operating Instructions
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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, #, 1,9,3,4 in sequence, and ‘TECH’ will be displayed in the LCD to
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, #, 1,9,3,4’ in sequence again, or turn
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.
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
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 automa tic receiving
mode.
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 * , and the middle digit may
be changed to any digit between 0 and 9.
AUTO IOURNAL
The fax machine prints the TX/RX journal
automatically after every 50 fax sessions.
MODEM SPEED
Select baud rate of 9600,7200,4800, or 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 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.
Samsung Electronics
3-l

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 - and
saves the price of the call.
Choose YES to turn on charge saver.
Choose NO to turn off charge saver.
REMOTE PASSWORD
You can change the three-character password used
to access your machine from a remote phone. The
password is preset to “#139#” (pound one three
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.
LINE MONITOR
You can hear line signals through a tone speaker.
The volume is adjustable.
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 : 0 second, 30 seconds, 60
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.
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 dB steps using the control
panel keypad.
Accuracy is + 0 /-3 dBm.
3-2 Samsung
Electronics

RECEPTION LEVEL RING ON CHECK TIME
Operating Instructions
*
Reception level may be too low due to cable losses.
If set to -43 dBm, reception sensitivity will be
between 0 and -43 dBm.
If set to -48 dBm, reception sensitivity will be
between -5 and -48 dBm.
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.
e
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
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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
system. You can adjust the time from 1 set to 9 set
(1 to 9).
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 ring signal is changeable by this
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 msec)
RING CHECK MAXIMUM TIME
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
use ) or 4 to change the status of a selected
function.
Samsung Electronics
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 3-1: 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
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i
Figure 3-2: CIS Shading Waveform
I
3-4 Samsung Electronics

MODEM TEST ROM TEST
Operating Instructions
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The modem will send various transmit signals on
the telephone line. You can check the following:
l FSK test
l tones: 1100 Hz, 1650 Hz, 1850 Hz, 2100 Hz
l G3 training: 9600,7200,4800,2400 bps
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3-4 Report Printout
Tests machine ROM (Read Only Memory). The
result and the software version appear in the LCD
in the following format:
CHKSUM= XX, VXX, OK
MEMORY CLEAR
Erases contents of RAM. When memory is cleared,
the machine returns to default settings.
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.
CI
CONFIRMATION REPORT
Shows the last transmission result.
VOICE STATUS REPORT
m
Shows the status of the recorded voice messages.
TRANSMISSION TOURNAL
Shows information about faxes sent.
RECEPTION IOURNAL
Shows information about faxes received.
TELEPHONE NUMBER LIST
Lists all numbers stored in the machine’s one-
*touch and speed
dialling memory.
SYSTEM DATA LIST
Shows all options that were set in user mode and
service mode.
PROTOCOL LIST
This list is available in the service mode only, and
shows the sequence of the CCITT group 3 T.30
protocol during the most recent TX or RX
operation. You can check for send and receive
errors with this list.
If a communication error occurs while the machine
is in service mode, the protocol list will print
automatically.
HELP LIST
This report illustrates the machine’s basic
functions and commands. Use as a quick reference
guide.
Samsung Electronics 3-5

Operating Instructions
3-5 LCD Disdav
3-5-l During communication
3-5-2 If a communication problem
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 (MH), baud rate in kbps,
and line time.
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:
PRE-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 Samsung
Electronics

4. Disassembly and Reassembly
Note: Make sure power is OFF, and unplug the power cord from the wall outlet.
4-l Handset
lDisconnect 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.
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Figure 4-1
4-2 T X Guide & White Roller
l Open the operation unit assembly.
l Disengage the stopper.
l Remove TXguide.
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l Remove white roller.
Figure 4-2
Samsung Electronics
4-l

Disassembly instruction
4-3. TOD 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. OPE Unit
l Disconnect the harnesses from the Main PBA.
lLoosen the two screws fastening the Main PBA.
l Disconnect the harnesses from the LIU PBA.
l Remove the OPE unit from the base unit.
Main PCB
Figure 4-4
4-2
Samsung Electronics

Disassembly Instruction
4-4-l. OPE Cover
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lLoosen the seven screws fastening the OPE
unit.
l Carefully lift the OPE cover in the direction of
the arrow as shown.
Figure 4-5
4-5. Main Frame
l Loosen the screw fastening the power supply
and earth harness.
l Loosen the five screws fastening the main frame
assembly.
l Lift the main frame assembly and D.DET sensor
PBA.
Figure 4-6
Samsung Electronics
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 Samsung Electronics

5. Circuit Description
+
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 SOOOH) and 64kB ROM
(FFOOOOH through FFFFFFH).
c
*
c
c
FFFFFF
FOOOOO
OFFFFF
000000
ROMcsn
Not
Available
CSOn
:
,,*’
”
,#,’
,**’
,*’
Reserved
Setup
Registers
Operational
Registers
OOFDFF
OOFDCO
OOFD80
OOFDOO
OOFEFF
OOFEEO
OOFE80
OOFEOO
DBCMC Buffer
:
Dither Table
-jiyq; F B80
OOEOOO
Figure 5-1: XFC Memory Map
Samsung Electronics
5-l

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 /RD and /WR ports of RAM , ROM,
and the MODEM in order to read or write data
when a chip select line is active.
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.
/CSO: RAM chip select active (low)
/ROMCS: ROM chip select active (low)
/MCS: MODEM chip select active (low)
DO - D7: 8 bit data bus
A0 - A19: address bus
COMMUNICATION
PRINTER
DATA
CONTROL
AND
SENSORS
STB O-3
I
PDAT
1
PCLK
-
PLAT
THADI
IFC(XFC-6)
RTC
CRYSTAL
IROMCS
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IRAMCS
IRDIWR
) EXTERNAL
BUS
DO-D7
AO-A17
IRDIWR
DO-D7
AO-A4
MODEM
IMCS
IMIRQ
SYSCLK
IPWRDWN
REST0
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IBATRST
Figure 5-2: XFC Hardware interface Signals
5-2 Samsung
Electronics

Circuit Description
5-2-4 Real Time Clock (RTC)
minutes, seconds, year, month, and day.
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A battery maintains operation when power is off.
This circuit receives clock pulses from an external
XFC-B can up-track 32 years, beginning with 1992.
32.768 kHz crystal, which it divides into hours,
32768 KHz
15 BIT
1Hz
- PRESCALER
H
6 BIT 1 co=6~~~ co=6k[z
SECONDS CO=24
BUSY FLAG CLEAR BUSY FLAG
- CO=28,29,
: 5BIT
7
30,0r 31
4 BIT
co=12
5 BIT
MONTHS YEARS
I
I
LEAP YEAR
DECODER
1 DRIVER 1
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.
This system has a lOms/Line printing format and
determines STB High/Low enable status
according to the STBPOL signal.
Print Print
Cmd
Cmd
AA
PrintLine
(MSINT Cary-out)
Shifi Data
n
n
Sh D Sh C
I
ISh
D Sh C
Shift Clk
STBl
STB2
IIIIlIIIIIIIIllI
wiiiiiiiiir llllllllulllllll
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Figure 5-4: Printer Timing
Samsung Electronics
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
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.
Counter Clock-------i
Comparator
THDI
t
%
m
m
B
0
DAC out
6 MSBs
c
Battery
Figure 5-5: ADC Block Diagram
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 (Tl)} / (R29 + Rth (Tl)}
R29 = (15Rth (Tl) x Rth (T2)}/ {Rth (Tl) -16Rth (T2))
Where Tl = minimum temperature, T2 = maximum temperature.
Figure 5-6: THD Connection Circuit
5-4
Samsung Electronics

Circuit Description
5-2-7 Operation Panel Control
c
*
c
9
Communication
A Synchronous/ Asynchronous
Receiver/Transmitter (SART) controls serial data
transmission between the main circuit board and
the operator panel.
CPU Bus
+
SclkCtrlLo
SclkCtrlHi
Band Gen (8x)
) SartlRQ
Tx/Rx Control
IRQ control
-
t
4
+
SARTCmd - RxShift Reg
4
1
(SARTData)
RxBuffer
Figure 5-7: SART Block Diagram
---)(j SCLK
4 RXD
Samsung Electronics