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Circuit Description

SF700AT

5-3

Figure 5-4: Printer Timing

5-2-4 Real Time Clock (RTC)

This circuit receives clock pulses from an external
32.768 kHz crystal, which it divides into hours,

minutes, seconds, year, month, and day.
A battery maintains operation when power is off.
XFC-B can up-track 32 years, beginning with 1992.

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. STB0 - STB3 enable TPH printing in four
sequential intervals.

This system has 10ms/Line printing format and
determines STB High/Low enable status
according to the STBPOL signal.

Figure 5-3: RTC Block Diagram

32768 KHz

15 BIT

PRESCALER

1Hz

CO=60

CO=24

6 BIT

SECONDS

6 BIT

MINUTES

5 BIT

HOURS

BUSY

DETECT

5 BIT

DAYS

4 BIT

MONTHS

5 BIT

YEARS

MONTH

DECODER

LEAP YEAR

DECODER

3 STATE

DRIVER

BUSY FLAG CLEAR

BUSY FLAG

CO=28,29,

30,or 31

CO=12

PrintLine

(MSINT Cary-out)

Shift Data

Sh D

Sh C

Sh D

Sh C

Cmd

Shift Clk

STB0

STB1

STB2

2 DotClk Delays

5 DotClk Delays

2 DotClk Delays

STB3

Cmd

Содержание SF700AT

Страница 1: ...cation 3 Operating Instructions 4 Disassembly and Reassembly 5 Circuit Description 6 Troubleshooting 7 Electrical Parts List 8 Exploded Views and Parts List 9 PCB Diagrams 10 Block Diagram 11 Wiring Diagram 12 Schematic Diagrams FACSIMILE SERVICEManual ...

Страница 2: ...Samsung Electronics Co Ltd APR 1998 Printed in Korea JF68 60A ELECTRONICS ...

Страница 3: ...ough which people particularly children might insert fingers or objects and contact dangerous voltages 3 When re installing chassis and assemblies be sure to restore all protective devices including control knobs and compartment covers 4 Design Alteration Warning Never alter or add to the mechanical or electrical design of this equipment such as auxiliary connectors etc Such alterations and modifi...

Страница 4: ...vices not classified as anti static can generate electrical charges sufficient to damage ESDs 5 Do not use Freon propelled chemicals When sprayed these can generate electrical charges sufficient to damage ESDs 6 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 a...

Страница 5: ...rameter Specification Normal Max Min Horizontal Vertical Horizontal Vertical Document Size Document Thickness Scan Line Length Effective Scanning Width Scanning Method Resolution MH Modified Huffman B4 A4 x 30 m core 12 7 mm diametre 252 mm Thermal recording with solid state Thermal Printing Head 203 pels in 8 dots mm Super Fine 3 85 lines mm Fine 7 7 lines mm Standard 15 4 lines mm Parameter Spec...

Страница 6: ...r Specification Communication Facility Line Coupling Transmission Speed Modem Carrier Frequency Control Signal Output Level Input Sensitivity Input Output Impedance 2 3 Line Control Block DP DTMF Direct dialing Memory dialing Redialing 10 memory dial power on Check Power Label attached near the power outlet 50 to 95 F 10 C to 35 C 20 to 80 RH Non Condensing 305 X 116 X 243 mm 3 9 Kg Parameter Spec...

Страница 7: ...ode 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...

Страница 8: ...mbers from 01 to 98 The machine doesn t accept double character codes 11 22 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 aler...

Страница 9: ...hecking busy on time if any signal noise is detected the machine will ignore the signal noise unless it is greater than a specified time 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 recall time BUSY TONE DETECTION LEVEL While ch...

Страница 10: ...an check the following FSK test tones 1100 Hz 1650 Hz 1850 Hz 2100 Hz G3 training 9600 7200 4800 2400 bps DTMF TEST The machine tests its DTMF Dual Tone Multi Frequency When you press any key on the keypad including and you will hear the corresponding key tone LINE PATH TEST Tests the telephone line loop ROM TEST Tests machine ROM Read Only Memory The result and the software version appear in the ...

Страница 11: ...mory VOICE STATUS REPORT Shows the status of the recorded voice messages TRANSMISSION JOURNAL Shows information about faxes sent RECEPTION JOURNAL 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 availabl...

Страница 12: ...one of the following reasons PAPER JAM CUTTER 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 ME...

Страница 13: ... wall outlet 4 1 Main Chassis 4 2 Main PBA and LIU PBA Figure 4 2 1 Disconnect the handset cord modular plug from the machine 2 Remove the the six screws 3 Remove the Main Chassis 1 Loosen the six screws fastening the base 2 Unplug the connector from the PBAs 3 Remove the MAIN PBA and LIU PBA Figure 4 1 ...

Страница 14: ...sor PBA Power 4 4 Top Cover Figure 4 4 1 Loosen the six screws fastening the base 2 Remove the Sensor PBA and Power 1 Open the operation panel and RX Cover 2 Loosen the three screws fastening the top cover 3 Lift the top cover carefully Figure 4 3 ...

Страница 15: ...r Cover 4 6 RX Cover Figure 4 6 1 Loosen the four screws fastening the rear cover 2 Remove the Rear Cover 1 Hold the wire spring as shown in figure 4 6 1 Remove the bushing 3 Lift RX cover assembly while pulling in the direction of arrow Figure 4 5 ...

Страница 16: ...lers 4 8 CIS Figure 4 8 1 Hold the bushing as shown in figure 4 7 Remove the roller assembly from the bushing with screwdriver 2 Lift roller assembly while pulling in the direction of arrow 1 Lift the CIS assembly 2 Unplug the connector Figure 4 7 ...

Страница 17: ...4 9 OPE Assembly Figure 4 10 1 Loosen the three screws 2 Lift the OPE assembly Figure 4 9 4 10 Cutter Assembly 1 Loosen the two screws fastening the Base 2 Remove the cover cutter 3 Loosen the two screws fastening the Base 4 Lift the cutter ...

Страница 18: ...embly and Reassembly 4 6 SF700AT Figure 4 11 4 11 TX RX Motor 1 Loosen the two screws fastening the Base Rx motor assÕy 2 Loosen the two screws fastening the Base Tx motor assÕy TX Motor assÕy RX Motor assÕy ...

Страница 19: ...C including I O port and system reset circuit Figure 5 1 XFC B Memory Map CPU Logical Address Space FFFFFF F00000 0FFFFF 000000 MCSn ROMCSn CS0n Not Available Internal Registers CS2n CS4n CS1n Internal Memory 00FFFF 00FF00 00FE00 00FD00 00FC00 00E000 Reserved Setup Registers Operational Registers CS4n CS3n CS2n Reserved Shading Inversion DBCMC Buffer Dither Table Reserved 00FEFF 00FEE0 00FE80 00FE...

Страница 20: ... ROMCS ROM chip select active low MCS MODEM chip select active low D0 D7 8 bit data bus A0 A16 address bus 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 OPERATOR PANEL SERIAL COMMUNICATION PRINTER DATA CONTROL AND SENSORS MOTOR DRIVER MOTOR SCANNER CONTROL AND PROCESSING RTC CRYSTAL EXTERNAL BUS MODEM GENER...

Страница 21: ... to the TPH from a shift register through PDAT STB0 STB3 enable TPH printing in four sequential intervals This system has 10ms Line printing format and determines STB High Low enable status according to the STBPOL signal Figure 5 3 RTC Block Diagram 32768 KHz 15 BIT PRESCALER 1Hz CO 60 CO 60 CO 24 6 BIT SECONDS 6 BIT MINUTES 5 BIT HOURS BUSY DETECT 5 BIT DAYS 4 BIT MONTHS 5 BIT YEARS MONTH DECODER...

Страница 22: ...rom 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 Thermal ADC Block Diagram Figure 5 6 THDI Thermal Printer Head Connection Circuit 5V Ground R28 R29 THD1 Rt T Thermal printhead thermistor Approximate values of R28 and R29 can be calculated from the following formulas R28 0 25 R29 rT T1 R29 Rt T1 R29 15Rt...

Страница 23: ...Shift Reg SartlRQ CPU Bus SCLK RXD TXD Internal Register SARTData RxBuffer SARTData TxShift Reg 5 2 7 Operation Panel Control Communication A Synchronous Asynchronous Receiver Transmitter SART controls serial data transmission between the main circuit and the operator panel Figure 5 7 SART Block Diagram ...

Страница 24: ... Correction Inversion Table 8x6 Mutiplier 8 8 4 1 2 Shade RAM 8 8 External Video Processing Data Output Text mode image Dynamic Background Contrast Control 1 External Video Processing Data Input To Line Buffer IF DMA Channel 1 4 1 1 6 8 FADC Gray Scale Image Edge enhancement 3 Dithering or B W Thresholding Dither Table Scan Data Bi level B4 to A4 Reduction Primary Paths Secondary optional Paths In...

Страница 25: ...S Input Processor To process the B W input signal maximum VREF and minimum VREF values of the CIS input signal are controlled by calibrating MUXA and MUXB in the high state for the maximum level and setting them to earth for the minimum level Processing to compensate for CIS shading distortion is controlled with MUXA low and MUXB high For B W mode MUXA should be high and MUXB low For half tone MUX...

Страница 26: ...ase B OFF RX Motor Phase A ON RX Motor Phase A OFF RX Motor Phase B ON RX Motor Phase B OFF Circuit Description 5 8 SF700AT 5 2 11 I O Port Table CIRCUIT NAME I O PIN NO PIN NAME STATE DESCRIPTION SPK CTL A4_DET B4_DET DSCAN DSP_ACK TX_CTRL B4_EMP A4_EMP CUT_EN CUT_PH CUT_POS DSP_H L TXD RXD RING_DET DATA FLAG PMA PMB PMA PMB GPIO 0 GPIO 1 GPIO 2 GPIO 3 GPIO 4 GPIO 5 GPIO 6 GPIO 7 GPIO 8 GPIO 9 GP...

Страница 27: ...Hz tone of 20 ms duration RESET drives MODEM POIR and serves to reset the MODEM MIRQ is the MODEM interrupt signal TX Motor Phase A ON TX Motor Phase A OFF TX Motor Phase B ON TX Motor Phase B OFF TX Motor Phase A ON TX Motor Phase A OFF TX Motor Phase B ON TX Motor Phase B OFF RESERVED RESERVED RESERVED CIRCUIT NAME I O PIN NO PIN NAME STATE DESCRIPTION SMA SMB SMA SMB N C N C N C SM0 SM1 SM2 SM3...

Страница 28: ...ode BATTERY POWER RESET When battery power VB is applied to IFC the first time VB current results in BATRST going low causing a reset to occur 5 2 14 Reset Two power resets and a watchdog timer in the IFC comprise the elements of this circuit Battery power reset BATRST is used to initialise the battery powered logic and primary power reset PWRDWN initialises non battery powered logic when system p...

Страница 29: ...he IFC signal which enables MODEM initialisation at system power on D0 D7 are data buses RS0 RS4 are internal register select signals which determine the mode MCS is the chip select signal and RD WR are the read and write control signals RLSD is used for v 24 interface related signals and IRQ is the MODEM interrupt Refer to Figure 5 14 for available R96DFXL I O ports Table 5 14 I O Port HALFTONE M...

Страница 30: ... path functions as MIC input path Outgoing messages and memo messages out from CODEC 1 are stored in the voice memory U21 through the DSPG DRAM controller 5 5 4 Line Input and Play Path Incoming signal from line are stored in the voice memory U21 through CODEC 0 U24 and DSPG DRAM controller When it is played DSPG processes the data stored in the voice memory and sends them out to LIU through CODEC...

Страница 31: ...etection DP SIGNAL CIRCUIT DC Determines the DC characteristics of the interface circuitry when the FAX section is on line The dial pulse DP is generated by interrupting DC line loop with the Photo coupler IC K2 BD2 telephone line polarity matching VAR2 3 82V voltage regulator R44 R45 Vgs bias voltage regulator C39 voltage stabilization R46 DC resistance adjustment K2 dial pulse generator LOOP CUR...

Страница 32: ...n 1 LN is audio output to telephone line PULSE DIALl U2 pin 7 Mode is set to VDD by R20 pullup resistor Dial pulses originate at U2 pin 14 which toggles MV Q3 Q2 which drives Q4 Q4 output interrupts the telephone line Pulse M B ratio is set by U2 pin 6 VDD 33 66 and VSS 40 60 Optical coupler U6 inhibits manual dial when 5V is applied to pin 1 by carthing Q1 base driving U2 pin 5 high This prohibit...

Страница 33: ... Wiring Diagram sections of this manual Signals from the key matrix and delivered to U1 X Y input pin group P1 x U1 pin 4 TX DATA is UART code to MAIN PBA Display from controller is received at U1 pin 5 RX DATA LCD drive signals are U1 P20 P27 P33 P35 pins Machine status LED drive signals are U1 P00 P02 P04 P06 pins mic Input Circuit Connector Main MICOM Z 8601 LCD 16 x 1 lines Key Matrix LEDs 6 8...

Страница 34: ...Circuit Description 5 16 SF700AT MEMO ...

Страница 35: ...urn on power Load document in feeder Copy OK OGM Recording OGM play back Call machine from another phone ICM Recoding Auto Answer Manual operation RX OK Document fed Push START Key CIS ON LCD Display See 6 2 See 6 3 See 6 5 See 6 4 See 6 6 See 6 8 See 6 9 See 6 7 See 6 10 See 6 11 A System initialized Start ...

Страница 36: ...Troubleshooting 6 2 SF700AT Y Y Y N N N Hook off using handset Speakerphone operating Dial tone OK TX OK Speaker phone call See 6 12 See 6 14 End See 6 13 A ...

Страница 37: ...Replace power supply Fuse remain good 1 Replace Fuse 2 Plug in machine 1 Unplug machine 2 Check fuse Fuse OK Measure on the CONN board 5 V 5 V Check harness OK Replace OPE board and LCD module Replace harness Measure on the OPE board OK A End Check harness Replace harness Start End Connect as required Notify customer 6 2 LCD Not Display ...

Страница 38: ... Unplug P12 5 V Replace main board Check system reset U1 Pin 131 in main board Check Vcc from P5 7 to P5 8 Vcc 4 5 V See 6 2 Replace main board Logic H Replace OPE board Start End Replace OPE board and LCD module A 6 3 System Not Initialized ...

Страница 39: ...heck LCD display when document is loading Check 24 V from P5 2 to P5 4 in main board DOCUMENT LOADING displayed Replace Doc Sensor board Document fed Replace power supply Replace main board Replace motor ass y OK End 24 V OK Check motor pulse P1 11 13 15 17 in main board 24V 0V Start ...

Страница 40: ... 6 SF700AT 6 5 CIS LED Not Lit Load document in feeder CIS LED lights OK Check 5V 12V from P5 8 10 to P5 7 9 OK Replace power supply Replace CIS Replace main board End Check CIS from P4 9 Low Document fed See 6 4 Press START key Start ...

Страница 41: ...F700AT 6 7 Load document in feeder CIS LED on Copy produced OK Replace main board Replace motor ass y Check motor pulse P1 11 13 15 17 in main board 24V 0V Document fed Press START key Start See 6 5 1 End See 6 4 6 6 No Copy Operation ...

Страница 42: ...Troubleshooting 6 8 SF700AT Y Y Y Y Y N N N N N 1 Copy quality OK Copy all black TPH test OK Replace TPH Copy quality OK Replace main board Replace CIS End Copy all white ...

Страница 43: ...Y N N N N N N Start End End OGM Play Back Speaker On Check Mic signal from CN3 6 8 Check signal from U16 pin4 Replace main board Check signal from U16 pin 4 Check signal from CN14 1 2 Replace speaker Replace Mic Replace OPE board Check signal CONN B d from P22 1 2 ...

Страница 44: ...Troubleshooting 6 10 SF700AT 6 8 ICM Not Recording Y Y Y N N N Start End Call machine from other phone ICM Recording mode Check LIU board OK Replace LIU board Replace main board ICM Playback ...

Страница 45: ...SF700AT 6 11 6 9 Malfunction in Auto Answer Y N Y N Y N Start Call machine from another phone Auto answer Check signal on U7 pin3 in LIU board Check Hook switch OK Replace Hook switch board End Replace main board 5V 0V ...

Страница 46: ... 6 10 Malfunction in Manual Receiving N Y Y Y N N Start Lift handset from fax then press START Machine goes on line Check hook switch in CONN board OK Replace CONN board Replace main board End Check LIU board OK Replace LIU board ...

Страница 47: ...ion in Automatic Receiving Y Y Y Y N N N N Start Call fax machine Check telephone line OK Test customer Signal OK Replace LIU board Replace main board Check Tx Rx signal from CN13 2 CN13 4 in main board Auto answer Receive data See 6 9 End End ...

Страница 48: ...Troubleshooting 6 14 SF700AT 6 12 No Dial Tone Y Y Y N N N Start End Lift handset from fax machine Dial tone OK Replace LIU board Dial tone OK Replace CONN board Dial tone OK Replace main board ...

Страница 49: ...ing SF700AT 6 15 6 13 Malfunction in Transmission Y Y Y N N N Start End Load document in feeder Document fed Call receiving machine Press START key Start transmitting Replace LIU board OK Replace main board See 6 4 ...

Страница 50: ...Troubleshooting 6 16 SF700AT 6 14 Speakerphone Does Not Work Y Y N N Start End 1 Speaker on Dial tone OK See 6 12 Replace Main board LCD display Check Tx Rx signal from CN14 1 2 ...

Страница 51: ...ting SF700AT 6 17 Y Y Y Y N N N N 1 End Speaker On Check Mic signal from CN3 8 Replace Mic Replace OPE board Replace speaker Check OPE board Check signal from CN14 1 2 Replace main board Check signal from CN14 1 2 ...

Страница 52: ...8 1 SF700AT 8 Exploded Views and Parts Lists 8 1 Total Assembly ...

Страница 53: ... 01229A 1 6 ICT SPRING HINGE R JF70 40574A 1 7 PMO BUSHING WHITE JF72 41609A 1 8 ELA WHITE ROLLER JF96 01225A 1 9 PMO COVER REAR JF72 41602A 1 10 PMO COVER TOP JF72 41603A 1 11 ELA HOU BASE JF96 01282A 1 Boards Excluded 12 PMO HOLDER ADF JF72 41598A 1 13 RMO RUBBER ADF JF73 40518A 1 14 NPR SPRING PS ADF JF71 10513A 1 S1 SCREW TAPTITE BH B M3 L8 6003 000015 3 S2 SCREW TAPTITE PH B M3 L10 6003 00015...

Страница 54: ...SF700AT 8 3 Exploded Views and Parts Lists 8 2 Ass y OPE Unit ...

Страница 55: ...SET B JF72 41593A 1 9 PMO KEY START JF72 41588A 1 10 MPR SHEET COLOR A JF74 10513A 1 11 PMO KEY SET A JF72 41592A 1 12 PMO KEY ONE TOUCH JF72 41591A 1 13 PMO KEY TEL JF72 41587A 1 14 RMO RUBBER CON B JF73 40520A 1 15 RMO ROBBER CON A JF73 40519A 1 16 PBA SUB KBD SF700AT JF92 00786B 1 17 RMO RUBBER MIC JF73 40501A 1 18 PMO FRAME FRONT JF72 41596A 1 19 MEC PINCH ROLLER JF75 11005A 1 20 PMO FRAME HIN...

Страница 56: ...Exploded Views and Parts Lists SF700AT 8 5 8 3 Ass y RX COVER ...

Страница 57: ... RX COVER JF70 10875A 1 8 ICT SPRING LOCK L JF70 40571A 1 9 PMO BUTTON LOCK L JF72 41618A 1 10 ICT SHAFT LOCKER JF70 40567A 1 11 IPR GUIDE TPH L JF70 10876A 1 12 PMO BUTTON LOCK R JF72 41619A 1 13 ICT SPRING LOCK R JF70 40572A 1 14 PRINT HEAD THERMAL JF47 30068A 1 15 IPR GUIDE TPH R JF70 10877A 1 16 PMO FRAME DECURL JF72 41608A 1 17 ICT SHAFT DECURL JF70 40568A 1 S1 SCREW TAPTITE PWH B M3 L6 6003 ...

Страница 58: ...arts Lists SF700AT 8 7 8 4 PLATEN ROLLER Location No Description SEC Code Q ty Remark 1 PMO BUSHING WHITE JF72 41609A 2 2 NPM BUSHING SHAFT 2 JF71 50514A 2 3 MEC PLATEN ROLLER JF75 10779A 1 4 PMO GEAR PLATEN JF72 41614A 1 ...

Страница 59: ...Parts Lists 8 8 SF700AT 8 5 ASS Y WHITE ROLLER Location No Description SEC Code Q ty Remark ELA WHITE ROLLER JF96 01225A 1 1 PMO BUSHING WHITE JF72 41609A 1 2 MEC WHITE ROLLER JF75 10781A 1 3 PMO GEAR WHITE JF72 41630A 1 ...

Страница 60: ... 6 ASS Y ADF ROLLER Location No Description SEC Code Q ty Remark ELA ADF ROLLER JF96 01224B 1 1 MEC ADF ROLLER JF75 10780A 1 2 ICT SPRING CLUTCH JF70 40561A 1 3 PMO SLEEVE ADF 1 JF72 41616A 1 4 ICT SHAFT ADF JF70 40569A 1 5 ICT PIN JF70 40570A 1 ...

Страница 61: ...Exploded Views and Parts Lists 8 10 SF700AT 8 7 Ass y Base ...

Страница 62: ... 41613A 1 12 PMO HOLDER SPEAKER JF72 41604A 1 13 PMO COVER BASE JF72 41601A 1 14 PMO BOX BATT JF72 41624A 1 15 NPR GROUND PLATE B JF71 10517A 1 16 PBA SUB OPTIC SF700AT JF92 00797B 1 17 SPEAKER 3001 001026 1 18 CBF HARNESS MAIN SPK JF39 41047A 1 19 PMO ACTUATOR P SIZE JF72 41612A 2 20 PBA SUB OPTIC SF700AT JF92 00796B 1 21 SMPS JUST V2 JF44 10064A 1 22 CBF POWER CORD 1830 mm JF39 10056B 1 23 PBA M...

Страница 63: ...Exploded Views and Parts Lists 8 12 SF700AT 8 8 Harness ...

Страница 64: ... OPE JF39 41045A 4 CBF HARNESS MAIN TPH JF39 41046A 5 CBF HARNESS PJAM JF39 41054A 6 MES AUTO CUTTER JF75 10784A 7 SMPS JUST V2 JF44 10064A 8 CALBE FLAT 3809 001042 9 CBF HARNESS MAIN BAT JF39 41076A 10 CBF HARNESS SCAN DOC JF39 41043A 11 CBF HARNESS P EMPTY JF39 41044A 12 MOTOR STEP 3101 001018 13 MOTOR STEP 3101 001017 14 CBF HARNESS MAIN SPK JF39 41047A 15 CBF HARNESS MAIN LIU JF39 41075A ...

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