SAMSUNG FAXF3000TIVBW Service Manual

SAMSUNG FACSIMILE

SF3000/SF3000T

SERVICE Manual

FACSIMILE

CONTENTS

1. Precautions

2. Specifications

3. Installation

4. Service Mode

5. Circuit Description

6. Disassembly and Reassembly

7. Troubleshooting

8. Packing Assembly

9. Electrical Parts List

10. Block Diagram,

11. Connection Diagram

12. Schematic Diagrams

ELECTRONICS

©Samsung Electronics Co., Ltd. Jul. 1998

Printed in Korea

P/N. JB68-60988A

1. Precautions

Follow these safety, ESD, and servicing precautions to prevent personal injury and equipment damage.

1-1. Safety Precautions

1.Be sure that all built-in protective devices are in place. Restore any missing protective shields.

2.Make sure there are no cabinet openings through which peopleparticularly childrenmight 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 modifications will void the manufacturer’s warranty.

5.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.

6.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 . 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.

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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.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 to applying power to the unit under test.

2.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.

3.Use only a grounded tip soldering iron to solder or desolder ESDs.

4.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.

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, aluminum foil, or a comparable conductive material.

7.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.

8.Maintain continuous electrical contact between the ESD and the assembly into which it will be installed, until completely plugged or soldered into the circuit.

9.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.

1-3. Lithium Battery Precautions

1.Exercise caution when replacing a Lithium battery. There could be a danger of explosion and subsequent operator injury and/or equipment damage if incorrectly installed.

2.Be sure to replace the battery with the same or equivalent type recommended by the manufacturer.

3.Lithium batteries contain toxic substances and should not be opened, crushed, or burned for disposal.

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2. Specification

GENERAL

Application Circuit :	PSTN or behind PABX
Mode of Operation :	Half-Duplex
Communication Mode :	ITU Group 3
Effective Scanning Width :	A4 (210 mm)
Scanning Method :	CIS
Recording Paper Size :	A4, Letter, Legal
Effective Recording Width :	8 inch (203.2 mm)
Recording Method :	Thermal Ink-Jet
ADF :	15 sheets (based on A4 /20 lbs)
Paper Capacity :	100 sheets (based on A4, 10mm)
Resolution :	Standard/Fine/Super Fine/Photo
Gray Scale :	64 levels
Contrast :	Light/Auto/Dark
Memory :	512 kbyte for EPROM, 32 kbyte for SRAM
Modem Speed :	Max. 14,400 bps
Coding Method :	MH/MR/MMR
Transmission Speed :	10 seconds (Phase C by ITU 4% Chart/Memory TX)
Back Up Battery :	3 V Lithum / non-rechargeable
Power Supply :	Check power label attached near the power cord connection.
Insulation Resistance :	50 Mohm or more (typ. 3 G at 500 V)
Dimension (W x D x H mm) :	384 x 330 x 183 mm (including ASF)

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Specification

LIU

Out Band Signal Level :
0 - 4 kHz	P-20 dBm or less
4 - 12 kHz	P-40 dBm or less
2 kHz or more	P-60 dBm or less
Input Level Range :	-5 ~ -48 dBm
Coding Format
		L	H	1209 Hz	1336 Hz	1477 Hz
			697 Hz	1	2	3
			770 Hz	4	5	6
			852 Hz	7	8	9
			941 Hz	*	0	#

Frequency Tolerance : ± 1.5%

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3. Installation

3-1. Connections

3-1-1. Connection Diagram

3-1-3. Document Tray

AC power cord

Phone line cord

1.Insert the two tabs on the document tray into the slot on top of your machine.

00

Extension phone (option) (for SF3000 only)

3-1-2. Handset

Plug one end of the coiled cord into the jack on the handset, the other end into the modular jack on the left side of the machine.

Handset

2.Fold out the extender on the document tray, if necessary.

Extender

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Installation

3-1-4 Document Exit Tray

1.Insert the two tabs on the document exit tray into the slots on the front of your machine.

3-1-6. Extension Phone (Optional)

(SF3000 only)

Plug one end of the cord of your extension phone into the TAM lead and the plug of the TAM lead into the socket marked EXT. LINE on the back of the machine.

Document exit tray

2. Fold out the extender, if necessary.

0

00

Extender

3-1-5. Telephone Line

Plug one end of the telephone line cord into the TEL. LINE jack,the other end into a standard phone wall jack.

0	00

3-1-7. AC Power Cord

Plug one end of the cord into the back of the machine, and the other into a standard, grounded 3- pin AC socket (220 - 240 V, 50 - 60 Hz).

The machine turns on and the LCD displays ‘SYSTEM INITIAL..’. If there is no cartrige installed, or no paper, the display shows ‘NO CARTRIDGE’ or ‘PAPER EMPTY’.

To turn the machine off, unplug the power cord.

Note: If documents are deleted from memory due to a power failure, the machine automatically prints out a Power Failure report when power is reapplied.

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3-1-8. Backup Battery (SF3000T only)

1.Lift the control panel and open the cartridge compartment cover .

2.Remove the old battery, if necessary. Connect the new battery to the clips.

Installation

3.Insert the battery into the battery slot.

The battery maintains setup configuration and messages when a power failure occurs or when power is accidentally disconnected.

We recommend you use an alkaline battery because it lasts longer than a conventional battery.

4.Close the cartridge compartment cover, and close the control panel.

The battery can maintain the internal memory for about 20 hours. If the backup battery is weak or missing, the LCD displays a warning message.

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Installation

3-2. Loading Paper

The display shows ‘PAPER EMPTY’ when paper is not loaded. You can load approximately 100 sheets of paper.

1.Pull the paper support on the paper bin all the way up.

3.Squeeze the left paper guide and move it to the right to match the width of the paper.

Paper support

Paper Guide

2.Fan and insert the paper, with the printing side facing you.

Note: The machine is preset to load A4-size paper. To load letter or legal-size paper, you have to set ‘PAPER SIZE’ option to the desired size.

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Installation

3-3. Installing Print Cartridge

When the machine is powered up without the print cartridge installed, the LCD displays ‘NO CARTRIDGE ’.

1.Press Menu.

2.Press ¹ or † until ‘1.CHANGE CART.’ is displayed, then press Start/Copy.

3.Lift the control panel , and open the cartridge compartment cover .

Cartridge compartment cover

6. Insert the print cartridge in the carrier.

7.Push the cartridge firmly in the direction of the arrow until it clicks into place.

Control panel

4.Remove the new print cartridge from its packaging. Hold by the black areas or colored top only. Do not touch the copper area.

copper area

5.Carefully remove the tape covering the printhead. Be sure to remove all the tape.

8.After installing the print cartridge, close the cover and replace the control panel.

9.The display shows ‘:NEW :USED.’ Press Start/Copy to confirm ‘NEW’. (For used cartridge, press ¹ or † then press Start/Copy.) The display briefly shows ‘MONO INSTALLED.’

If the cartridge is not installed properly, ‘NO CARTRIDGE’ is displayed. Remove the cartridge and re-insert it.

10.The display asks if you want to run a SELF TEST. Press Start/Copy to run the printer self test.

If you press Stop, the machine returns to Standby mode.

11.The machine prints out a test pattern of the printer.

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Installation

Memo

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6. Disassembly and Reassembly

6-1. General Precautions on Disassembly

When disassemble and reassembling components, use extreme caution. The close proximity of cables to moving parts makes proper routing a must. If components are removed or replaced, any cables

disturbed by the procedure must be replaced as close as possible to their original positions. Before removing any component from the machine, note the cable routing that will be affected.

Whenever servicing the machine, you must perform the following:

1.Check that documents are not stored in memory.

2.Remove the print cartridge.

3.Unplug the power cord.

4.Work on a flat and clean surface.

5.Replace only with authorized components.

6.Do not force plastic components.

7.Make sure all components are in their proper position.

6-2. White Roller

1.Lift the control panel.

2.Push the white clip on each end of the roller slightly inward, then rotate it until it reaches the slot, as shown below. Then lift the roller out.

Note : Check the roller for dirt. If dirty, wipe it off with soft cloth dampened with water. If the roller is heavily worn, replace it with a new one.

white clip

Control panel

B A

White roller

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Disassembly and Reassembly

6-3. Rear Cover

1.Holding the paper guide, move it in the direction of arrow.

3.Holding the rear cover ass’y, take it out by rotating it to release properly.

Paper guide

2. Remove the six screws, as shown below.

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Disassembly and Reassembly

6-4. Top Cover and Speaker

1.Before you disassemble the top cover, you should remove:

–Rear Cover (see page 6-2)

2.Remove the handset, and unplug the connector from the main board.

4. Remove the four screws securing the cover.

3.Release the tie stopper supporting the control panel.

Tie stopper

5.If you want to remove the speaker, turn the top cover over, and remove the two screws securing it.

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Disassembly and Reassembly

6-5. Scan Motor

1.Before disassembling the scan motor, you should remove:

–Rear Cover (see page 6-2)

–Top Cover (see page 6-3)

2.Unplug the motor connector from the main board. Make sure the harness is released from the two hooks, as shown below.

4. Remove the ground plate.

Ground plate

5. Remove the ground screw securing the motor to the motor bracket.

3. Remove the two screws as shown below.

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Disassembly and Reassembly

6-6. ADF Roller and Contact Image Sensor (CIS)

1.Before disassembling the roller and CIS, you should remove:

–Rear Cover (see page 6-2)

–Top Cover (see page 6-3)

2.Remove the ADF roller. When you assemble the roller, make sure it is properly hooked.

3.Unplug the CIS harness, then remove the CIS ass’y. To remove the CIS ass’y, turn it up and slide the two legs far left, and pull it up.

4. Remove the CIS from the bracket.

Note : Clean the surface of the roller with ethyl alcohol. After wiping it, you must dry it completely.

Note: Check the glassy surface of the CIS for stains or scratches. If stained, wipe off with ethyl alcohol. If it is heavily scratched, replace it with a new one.

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6-5

Disassembly and Reassembly

6-7. SMPS

1.Before disassembling the SMPS, you should remove:

–Rear Cover (see page 6-2)

2.Unplug the SMPS connector from the main board. Make sure the harness is released from the hook.

3.Remove the two ground screws from the bracket, as shown.

4.Pushing down the hook, as shown in the inset, remove the SMPS.

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Disassembly and Reassembly

6-8. LIU Board

1.Before disassembling the board, you should remove:

–Rear Cover (see page 6-2)

–Top Cover (see page 6-3)

2.Remove the screw securing the ground wires to the SMPS bracket.

3.Pulling the snaps locking the board outward, remove the board.

Snap fit

4. Unplug all the connectors from the board.

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6-7

Disassembly and Reassembly

6-9. Buzzer and Hook Board

6-9-1. Buzzer

1.Before disassembling the buzzer, you should remove:

–Rear Cover (see page 6-2)

–Top Cover (see page 6-3)

2.Unplug the connector from the LIU board, and remove the buzzer.

6-9-2. Hook Board

1.Before disassembling the board, you should remove:

–Rear Cover (see page 6-2)

–Top Cover (see page 6-3)

2.Unplug the connector from the LIU board.

3. Remove the screw, then remove the board.

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Disassembly and Reassembly

6-10. OPE Unit

6-10-1. ADF Rubber Pad

1.Open the control panel.

2.Insert a flat blade screw driver into the slot as shown below, and remove the rubber holder and the rubber pad.

Rubber holder

6-10-2. OPE Unit

1.Before disassembling the OPE unit, you should remove:

–Dummy ASF (see page 6-2)

–Rear Cover (see page 6-2)

–Top Cover (see page 6-3)

–LIU Board (see page 6-7)

2.Unplug the connector from the main board, and pull up the OPE unit.

Rubber pad

Notes:

• When reassembling the rubber pad, be sure that it and the holder fit into the guide boss and the holder latches fit into the corresponding hole. Then push firmly until it clicks.

3. Remove the two screws and remove the cover.

• Clean the surface of the rubber pad with ethyl alcohol. After wiping, be sure to dry it. Check for rubber wear. If the wear reaches 1/2 its original thickness, replace it with a new one.

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Disassembly and Reassembly

4.Remove the microphone (SF3000T only) and the seven screws.

Notes:

•Do not turn the OPE unit upside down after you remove the screws securing the board. Keys and rubber contacts may be separated and easily lost.

•When reassembling the OPE unit, make sure the keys are in correct position.

•When reassembling the board, secure the screws according to the order printed on the PBA.

•After reassembling, operate the machine to make sure it works properly.

•After reassembling, make sure the LCD is not blocked.

Microphone (SF3000T only)

5.Remove the OPE board. Then remove the two screws from the LCD and remove the LCD.

LCD

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Disassembly and Reassembly

6-11. Printer Unit

1.Before disassembling the printer unit, you should remove:

–Dummy ASF (see page 6-2)

–Rear Cover (see page 6-2)

–Top Cover (see page 6-3)

3.Remove the two screws securing the printer unit, and unplug the six connectors from the main board.

2. Slide the cartridge carrier, as shown below.

The connectors are located as shown below. It is not necessary to unplug the LF motor connector to remove the printer unit.

LF motor

4. Remove the printer unit. When you pull up printer unit, be careful to properly release the harnesses.

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6-11

Disassembly and Reassembly

6-12. ASF Feeder

1.Before disassembling the ASF feeder ass’y, you should remove:

–Dummy ASF (see page 6-2)

–Rear Cover (see page 6-2)

4.Remove the screw securing the pickup shaft. To remove the pickup shaft, pull it to the far right and take it out.

2. Remove the two screws securing the ASF feeder.

Pickup shaft

3. Unlock the ASF feeder assembly, and remove it.

Note : When reassembling the ASF feeder ass’y, insure the harness for the line feed motor is not pinched or shorted.

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Disassembly and Reassembly

6-13. Printer Unit Miscellaneous

6-13-1. Cartridge Carrier Home Assembly

1.Before disassembling the cartridge carrier home, you should remove:

–Dummy ASF (see page 6-2)

–Rear Cover (see page 6-2)

–Top Cover (see page 6-3)

–Printer Unit (see page 6-11)

2.Remove the screw securing the cartridge carrier home, and take it out.

6-13-2. Cartridge Carrier Assembly

1.Before disassembling the cartridge carrier assembly, you should remove:

–Dummy ASF (see page 6-2)

–Rear Cover (see page 6-2)

–Top Cover (see page 6-3)

–Printer Unit (see page 6-11)

–Cartridge Carrier Home Assembly (see page left)

–ASF Feeder (see page 6-12)

–Main Board (see page 6-15)

2.Remove the cable holder, and remove the screw on the right side of the frame.

shaft

Carrier

Holder

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Disassembly and Reassembly

6-13-3. Base Frame Assembly

1.Before disassembling the base frame assembly, you should remove:

–Dummy ASF (see page 6-2)

–Rear Cover (see page 6-2)

–Top Cover (see page 6-3)

–Printer Unit (see page 6-11)

–Cartridge Carrier Home Assembly (see page 6-13)

–Cartridge Carrier Assembly (see page 6-13)

–ASF Feeder (see page 6-12)

–Main Board (see page 6-15)

2.Remove the roller friction assemblies, then the actuator feed.

3.Remove the base frame assembly.

6-13-4. Feed Roller Assembly and Line

Feeder Bracket Assembly

1.Before disassembling the feeder roller ass’y, and/or the line feed bracket ass’y, you should remove:

–Dummy ASF (see page 6-2)

–Rear Cover (see page 6-2)

–Top Cover (see page 6-3)

–Printer Unit (see page 6-11)

–Cartridge Carrier Home Assembly (see page 6-13)

–Cartridge Carrier Assembly (see page 6-13)

–Base Frame Assembly (see page left)

2.Remove the feed bearing from the main frame. Pull the feeder roller in the direction of arrow, and take it out.

Holdr Roller

3. Remove the two screws, then remove the feeder

bracket assembly.

Roller friction ass’y

Base frame ass’y

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Disassembly and Reassembly

6-14. Main Board

1.Before disassembling the main board, you should remove:

–Dummy ASF (see page 6-2)

–Rear Cover (see page 6-2)

–Top Cover (see page 6-3)

–ASF Feeder (see page 6-12)

3.Unplug all connectors from the main board. Then, pull the sensor lever towards you and remove the main board.

2. Remove the two screws securing the main board.

Sensor lever

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Disassembly and Reassembly

Memo

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5. Circuit Description

5-1. General

The main circuit board consists of a Jupiter-2 Chip (KS32C6500), memory, TXand RX-related circuitry, and some portions of the Line interface Unit, and controls the system.

5-2. System Control Part

This circuit consists of the EP-ROM and SRAM, External Real Time Clock crystal, RTC and memory back-up, and the Jupiter-2 Chip (KS32C6500). The Jupiter-2 Chip is an integrated 14400bps modem, image processor, 16bit MPU, peripheral control, and analog front end circuit on a single-chip.

The modem is 14400 bps half duplex. It is a monolithic device incorporating an over sampling ΣΔ AFE, digital filters, a digital signal processor (SDIP4) and CPU-Interface logic.

5-2-1. Memory Map

The external memory of the CPU is divided into 32kB RAM (0000H through 7FFFH), 512kB ROM (FC0000H through FFFFFFH) and 1024kB DRAM (010000H through 07FFFFH).

				Reserved	00FEFF
	CPU (Logical) Address Space				00FEE0
				Setup
				Registers	00FE80
	FFFFFF
	ROMCSn		00FFFF	Operational
	FC0000	MCSn
			00FF00	Registers
		Internal
	C00000	Registers	00FE00		00FE00
		CS2n -
	CAS0	CS4n	00FD00	CS4n	00FDFF
		CS1n			00FDC0
	800000		00FC00	CS3n
					00FD80
	CAS1	Internal		CS2n
					00FD00
	400000	Memory
	CAS2				00FBFF
	000000		00E000	Reserved	00FBE0
				Shading Inversion 00FBD0
				DBCMC Buffer	00FBC0
				Dither Table
					00FB80
				Reserved
					00E000

Figure 5-1 KS32C6500 External Memory Map

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Circuit Description

5-2-2. Jupiter-2 Chip

5-2-3. System Clock

KS32C6500 internal logic generates chip select signals for both memory chips and peripherals. To support external access, from one to three wait cycles can be inserted under program control during external accesses. A chip select signal line goes active (low) whenever its corresponding device is accessed over the external interface. The peripheral addresses are located in data memory.

/SRAMCS : SRAM chip select active (low) / ROMCS : EP-ROM chip select active (low) D0–D15 : 16 bit data bus

A0–A17 : address bus

The 30 MHz internal system clock frequency is supplied by an external clock generator.

SDIP4

TAD PART

A0~A5

CONTROL

D0~D15

D0~D7

ONLY SF3000T

XIN

RTC

CRYSTAL

XOUT

OPERATING

TXD

(32, 768KHZ)

PANEL

/DMS

SERIAL

RXD

/RD/WR

DATA

COMMUNICATION

D0~D7

MEMORY

A0~A14

(SRAM)

KS32C6500

/RASO~

DRAM.

/UCAS

(USER MEMORY)

/LCAS

HEAD

PHINA~D

/RD

DRIVER

D0~D15

PROGRAM

A0~A17

MEMORY

/A16

(EPROM)

/PMS

MOTOR

CONTROL

/RD/WR

D0~D7

MODEM

+24

A0~A4

DRIVER

(CR, LF

GENERAL

MOTOR)

/RESET

PURPOSE I/ 0

/RESTO

Figure 5-2 Hardware Interface Signals

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