Sanyo SFX-33 User manual

SERVICE MANUAL

Facsimile Transceiver

I FILE NO.

I

SFX-33

-

MAIN SPECIFICATIONS

Type

Desk-top type transceiver

Line connected

Public switched telephone network

Size of recording paper

216mm (8.5”) x 30m (98’)*

Effective scanning width

208mm (8.2”)

Effective recording width

212mm (8.3”)

Transmission speed

9600/7200/4800/2400 BPS

Transmission time

Approx. 20sec. (Transmission mode : standard)

Main scanning density

8 pels

Sub scanning density

3.85 lines/mm (Standard mode) 7.7 lines/mm (Fine mode)

15.4 lines/mm (Super fine mode)

Compression mode

MH (Modified Huff man) and Sanyo original

Reading method

CIS (Contact image sensor)

Recording method

Thermal printing

Power supply

AC 120V, 50/60Hz

Power consumption

Stand-by: 5W, Transmission : 20W, Reception : 130W, Copy : 150W

Overall dimensions

381 (W) x 116(H) x 263(D) mm

15’’(W)

X 4.6’’(H) X 1O.4’’(D)

Weight

Approx. 4.8 kg (10.61b)

Ambient temperature

5°C - 35°C (41“F - 95”F)

* High-grade thermal paper is 25m (82’)

REFERENCE NO.

SM 620027

INDEX

Contents

Page

1. INSTALLATION ........................................................................................................................................... 3-12

(1) Unpacking .................................................................................................................................................... 3

(2) Telephone line and AC connections ............................................................................................................ 3

(3) Setting the dialing mode switch ................................................................................................................... 4

(4) Installing the recording paper ....................................................................................................................... 5

(5) Machine initial .............................................................................................................................................. 6

(6) Machine programming ................................................................................................................................. 6

2. PERIODICAL INSPECTION AND MAINTENANCE .........................................................................................l3

3. OUTLINE ................................................................................................................................................... 14-16

(1) Paflnames and functions .......................................................................................................................... 14

(2) Operation Panel ......................................................................................................................................... 15

(3) Original documents precautions .................................................................................................................l6

4. Mechanical OUTLINE ................................................................................................................................. 17

5. TROUBLE SHOOTING .............................................................................................................................. 18-27

5-1. Function description of each PCB ............................................................................................................. 18

“L

5-2. Trouble shooting for mechanical .............................................................................................................. 20

5-3. Trouble shooting forcircuit~ .................................................................................................................... 21

5-4. Error code list ........................................................................................................................................... 26

6. REPAIRS ................................................................................................................................................... 28-39

6-1. Removal of the main pafls ....................................................................................................................... 28

6-2. Replacement of the main patis ................................................................................................................ 30

6-3. Test mode ................................................................................................................................................ 31

6-4. RAM CODE LISTexplanation .................................................................................................................. 36

7. PRINTING OF THE REPORT AND LISTS .................................................................................................4O.44

7-1. Activity report ........................................................................................................................................... 40

7-2. One-touch and Speed dial list .................................................................................................................. 40

7-3. Transmission report ................................................................................................................................. 41

7-4. Feature switch list .................................................................................................................................... 41

7-5. RAM CODE List ....................................................................................................................................... 42

.8. FLOW CHART OF AUTO RECEPTION MODE ....................................................................................... 45-47

(1) Auto reception with FAX/TEL switchover function isON ........................................................................... 45

(2) Auto reception with FAX/TEL switchover function is OFF ......................................................................... 46

(3) Answer reception mode ............................................................................................................................. 47

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9. BLOCK DIAGRAM AND SIGNAL FLOW ................................................................................................... 48-51

9-1. Block diagram .......................................................................................................................................... 48

9-2. Signal flow ................................................................................................................................................ 49

10. SCHEMATIC DIAGRAM .......................................................................................................................... 52-74

(1) All Connection Diagram ............................................................................................................................. 52

(2) Each Circuit Diagram ................................................................................................................................. 53

(3) PWB Wiring Diagram ................................................................................................................................. 65

(4) Abbreviated signal explanation .................................................................................................................. 73

11. PARTS SPECIFICATIONS ...................................................................................................................... 75-80

(1) IC configuration .......................................................................................................................................... 75

(2) Parts specification forpower supply .......................................................................................................... 80

(3) Figure of main patisfor power supply ........................................................................................................ 80

12. TIME CHARTS OF EACH COMMUNICATION MODE .................................................................................. 81

13. COMMUNICATION SiGNAL FLOW CHART ................................................................................................. 82

14. EXPLODED VIEW ................................................................................................................................... 83-85

15. PARTS LIST ............................................................................................................................................ 86-90

L

2

1. INSTALLATION

(1) Unpacking

To unpack the SFX-33

1.

2.

3.

4.

5.

6.

7.

Open the carton.

Remove the accessories (handset, recording paper roll, etc.) from the carton.

Remove the fax machine along with the foam braces on both sides.

Remove the polyethylene wrapping around the fax machine.

Remove the transportation tapes.

Save the carton and the foam braces for later storage and/or shipping.

Place the machine where there is access to an AC outlet and a modular phone jack. (Be sure to observe the

precautions.)

Placement precautions

●Avoid placing the SFX-33 in humid or dusty places, or in places where it will be exposed to excessive heat (direct

sunlight, heaters, etc.).

●DO not step on or set anything on the AC cord. DAMAGE TO AC CORD IS A SAFETY RISK AND CAN CAUSE A

FIRE.

●Install the unit only on a stable surface.

.Do not connect the SFX-33 to the same AC outlet as appliances that generate large amount of interference

(heaters with thermostats, appliances with motors, etc.). It is best to use a completely separate electrical outlet.

●Keep the SFX-33 away from water. If water accidentally enters the unit, unplug the AC power cord immediately.

DO NOT PLUG THE UNIT IN AGAIN. Contact and authorized Sanyo service center or dealer.

Handling precaution

●Avoid bending, kinking or damaging the power cord.

●Never insert or remove the power cord with wet hands. Also, be sure to hold the cord by the plug when removing

it from the outlet.

.Do not remove any parts that are held in place with screws. (The SFX-33 dose not contain any user-serviceable

items.)

●Maintain standard room temperature 5“C-35”C(41 OF-95°F) during use. Do not subject the unit to shock or

vibration. Do not move the unit while it is in use.

.A rapid increase in room temperature in cool weather can cause condensation to form inside the unit.

If this happens, wait at least 15 minutes after turning the unit on before attempting to operate it. Failure to do so

may result in paper jams and/or poor print quality.

●When cleaning the cover or operation panel of the unit, wipe gently using a damp cloth to which a small amount

of a neutral detergent has been added. NEVER USE SOLVENTS OR CHEMICALLY TREATED CLOTHS.

(2) Telephone line and AC connections

To AC outlet

t

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(w I [=]

3

,~

boo)

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(3) Setting the dialing mode switch

The SFX-33 has been factory-set to the Touch-Tone dialing mode.

If your telephone line uses pulse dialing, you must change the dialing mode setting using the feature switch No. 00.

~

The sound heard

Your telephone Set the feature

{ telephone ~

when you dial

line is

switch No. 00 to:

Push-button

telephone

1

/’-

+

~

Rotary-dialing

telephone

14: SET MODE ?

I

l: TIME SET ?

13: FEATURE SW. ? I

● If you are still not sure which dialing system your telephone line is using, contact your telephone company.

To change dialing mode to PULSE:

1.Press [MENU] 4 times.

2. Press [SET].

L

3. Press [MENU] twice.

4. Press [SET1.

5. Press [SET].

6. Enter [0] and [1] to select the PULSE mode.

7. Press [SET1.

8. Press [STOP/C] twice.

1(0~) DIAL MODE

I

TONE

(ml

10PPS

1(0~) PAUSE TIME

1

lJun .26

’95 12:001

4

(4) Installing the recording paper

How to install the recording paper roll:

1. Press the [OPEN] button to open the recording paper

3. Pull out the end of the roll from the recording paper

cover.

exit until it extends 4 inches.

2. Place the supplied roll, in the direction shown in the

4. Close the recording paper cover by pressing both left

diagram, in the paper holder with both sides seated

and right corners of the far end of the cover firmly.

securely.

The SFX-33 cuts the extra recording paper

● Remove any slack from the roll.

automatically.

Inserl the end of the roll into the recording paper

exit slot.

Open button

● Use only the recording paper specified for the SFX-33.

High-grade thermal paper

The SFX-33 is compatible with the high-grade thermal paper, a new type of fax recording paper with plain-paper

quality. Unlike regular thermal paper, the high-grade thermal paper does not fade with time, can be written on with

pencil and can be erased.

SANYO Type: 3RE21 82800450,216 mm (8.5”) wide and 25 m (82’) long.

Thermal paper

SANYO Type: R-4079448-1, 216 mm (8.5”) wide and 30 m (98’) long,

To purchase, contact your dealer.

Anti-curl system

The SFX-33 has a built-in anti-curl system that prevents thermal recording paper (high-grade or regular) from curling.

u

5

(5) Machine initial

L.

1. Connect AC plug into AC outlet.

10ct .26 ’95 12:001

-

2. Press [MENU] while [SETl key is being pressed and

keep this condition one second.

l: INITIAL SET ?

3. Press [SET].

IALL CLEAR ? I

4. Press [SET] or [MENU].

!

[SET] : Initialize all memories then goes to next mode

“RAM CODE SET”.

S-RAM check is also carried out at the same time.

[MENU] : Initialize individual memory.

In case of pressing [MENU], follow the steps below

5. Press [SET] or [MENU].

[SET] : Initialize RAM CODE DATA and goes to next item

“0.T & S.D DATA”.

[MENU] : Not initialize RAM CODE DATA, just goes to next

item “0.T & S.D DATA”.

6. Press [SET] or [MENU].

[SET] : Initialize O.T & S.D DATA and goes to next item

“REPORT DATA”.

[MENU] : Not initialize O.T & S.D DATA, just goes to next

item “REPORT DATA”.

7. Press [SETl or [MENU].

[SETl : Initialize REPORT DATA and goes to next item

“RAM CODE SET”.

[MENU] : Not initialize REPORT DATA, just goes to next

item “RAM CODE SET”.

2: RAM CODE SET ?

IRAM CODE CLEAR ?I

10. T & S.D CL EAR? I

lREPORT DATA CLR?I

2: RAM CODE SET ?

8. Press [STOP/C] to finish Machine initial setting.

REMARKS

L

In case of S-RAM Error at step 4, alarm sounds continuously and the machine

goes into “DEAD LOCK” condition

● Repair is required. (check S-RAM and its 1/0 signals)

(6) Machine programming

(6)-1 Setting your station name and fax number (Header)

1.Press [MENU] 4 times.

2. Press [SET1.

4: SET MODE ?

l: TIME SET ?

3. Press [MENU].

7

5. Enter your station name.

See next page for detail of entering names.

A maximum of 24 characters can be entered.

6. Press [SET].

7. Enter your station Tel. No.

A maximum of 20 digits can be entered

including “hyphen” and “+”.

hyphen (–) : Press [SPEED DIAL] between the number entered

+ : Press [HOLD]

“+” can only be entered preceding the telephone number.

ABC~ ;ABCDE

STATION TEL No. ?

*

19

l-222 -333 -4444~

8. Press [SET] to complete.

The display shows next setting item “FEATURE SWITCH”.

3: FEATURE SW. ?

● Your station name and fax number (Header) can be printed either outside the document or inside the document.

You can select the desired setting using feature switch No. 20. Default setting is printed outside of the document.

Printing outside of the original.

Jun. 26’9512:00 ABC

1–––

!

I

t

Printing inside of the original.

FAX 012345 P.1

---— - ---- ---- ---- ---- ——————

1

I

1

---- -———- ---- --———_____

1

:Jun. 26’9512:00

1

--—- —--- ---- ---- ---- ---— ---- ---- ——-- -

ABC FAX 012345

---— -.

I

P.1 ;

1

w

Before programming the one-touch, speed dial memory and setting your station name, you need to know to enter

names using number keys and one-touch keys.

The one-touch keys [6], [7] and [8] are used for name programming.

The characters are grouped as shown below:

Group 1

Group 2 Group 3

ABCDE

abcde

12345

FGHIJ

fghij 67890

KLMNO

klmno

.*

.,. ,

PQRST

pqrst +-/&*

UVWXY

Uvwxy

#

‘“()

z

<>!?=

mm

CmXD

am

Registration Selection

Area

~~

:ABCDE

—

Cur130rl

CuJ50r2

The LCD display is divided into 2 sections: The registration area (left) shows the name being entered, and in

the selection area (right), a set of 5 characters appears as you scroll up or down the display. Each area has a

separate cursor.

Selecting a character

L

1. Use number key [5] to select the desired character group.

The first line of the selected group appears each time the number key [5] is pressed.

2. Use number keys [2] or [8] to scroll up or down the display.

3. Use number keys [4] or [6] to move the cursor 2 over the desired character.

4. Press [}] (one-touch key 7) to enter the selected character into registration area.

The cursor 1 moves to the right.

5. Repeat steps 1-4 to finish writing a name.

● To leave a blank space in the name, press number key [0].

● To backspace the cursor 1, move the cursor 2 over the colon (:) and then

press [4] (one-touch key 6).

● To advance the cursor 1 to the right, move the cursor 2 over the colon (:) and then

press [}] (one-touch key 7).

● To erase a character, move the cursor 1 over the character to be erased, and then

press [DELETE] (one-touch key 8).

(6)-2 One touch dial memory programming

Up to 28 telephone or fax numbers (and corresponding names) can be stored in the SFX-33’S memory.

The fax/phone numbers stored to each of the 8 one-touch dialing keys (1-8) can be dialed out at the touch of a

single key. Write the names of these numbers onto the supplied one-touch key template.

An additional 20 numbers can be stored using the speed-dialing numbers (01-20).

1. Press [MENU] 3 times.

3:0. T & S.D SET?

2. Press [SET].

O.T No. =

❑ ?

3. Press one-touch dialing key (1-8).

Example: To program a number in the one-touch

key 2, press [one-touch key 2].

4. Press [SET].

I

O.T No. =

❑ ?

5. Enter the party’s name (to a maximum of 16 characters).

EDWARD~ :ABCDE

6. Press [SET].

7. Enter the fax (or telephone) number.

8,

9

(A maximum of 32 digits can be entered including

pauses and hyphens.).

Example: 1-222-3333

Press [SET].

● To program other one-touch numbers, repeat

steps 3-8 above.

Press [STOP/C] to finish one-touch number programming.

l-222 -3333~

I

O.T No. =

❑ ?

I

Jun .26

’95 12:00 _

● For instructions on printing out a numerical list of programmed named and numbers.

. To interrupt programming, press [STOP/C].

● To enter a hyphen (-), press [SPEED DIAL].

● To enter a three-second pause between two digits of a number, press [REDIAL/P] in the appropriate place.

A semicolon (;) indicates a pause.

● If you make a mistake in entering fax/phone number, move the cursor over the digit to be changed using the

[}] key (one-touch key 7) or [ < ] key (one-touch key 6), and press [DELETE] (one-touch key 8) to delete the

digit.Then enter the correct digit.

(6)-3 Speed dial memory programming

1. Press [MENU] 3 times.

2. Press [SET].

3. Enter a speed-dial number using the number keys.

Example: To store a fax number in the speed-dial

number 10, press [1], then [0].

4. Press [SET].

3:0. T & S.D SET?

S.D No. =

lm ?

,, ,

,,-

..

5. Enter the party’s name (to a maximum of 16 characters).

EDWARD, :ABCDE

—

6. Press [SET].

7. Enter the fax (or telephone) number to be stored.

A maximum of 32 digits can be entered, including

pauses and hyphens.

Example: 1-222-3333

8. Press [SET].

Repeat steps 3-8 to program other numbers.

9. Press [STOP/C] to finish speed-dial number programming,

1-222 -3333H

I

S.D No. =

In ?

I

Jun .26

’95 12:00

QFor instructions on printing out a list of programmed names and numbers.

● To interrupt programming, press [STOP/C].

● To enter a hyphen (-) between a number, press [SPEED DIAL].

c To enter a three-second pause between two digits of a number, press [REDIAL/P] in the appropriate place.

A semicolon (;) indicates a pause.

. If you make a mistake in entering fax/phone number, move the cursor over the digit to be changed using the

[}] key (one-touch key 7) or [ < ] key (one-touch key 6), and press [DELETE] key (one-touch key 8) to delete the

digit. Then enter the correct digit.

10

Changing programmed one-touch/speed dialing numbers

1. Press [MENU] 3 times.

2. Press [SET].

3. Press one-touch dialing key or speed dialing number

of the number you want to change.

Example: Speed dial number 10

4. Press [SET].

5. Press [SET1.

6. Press [DELETE] to erase the wrong name, and

enter the new name.

(See “Entering names” on page 6-8.)

7. Press [SET1.

8. Press [DELETE] to erase the wrong number, and

then enter the new number.

9. Press [SET].

Repeat steps 3-9 to change other one-touch dialing/speed

dialing numbers.

10. Press [STOP/C] to finish changing.

Canceling programmed one-touch/speed dialing numbers

1. Press [MENU] 3 times.

2. Press [SET].

3. Press the one-touch dialing key or speed dialing number

of the number you want to cancel.

Example: One-touch dialing number 2 to cancel.

4. Press [SET],

5. Press [MENU].

6. Press [SET].

Repeat steps 3-6 to cancel other one-touch dialing/speed

dialing numbers.

S.D No. =

lm ?

EDWARD

:CHANGE

IHDWA R D ;ABCDE

lSMITH~ LFGHIJI

.

1~-222 -3333

11-333 -4444m I

O.T No. =

❑ 7

EDWARD : CHANGE

EDWARD :CANCEL

lxx CA NC EL LED **I

7. Press [STOP/C] to finish canceling.

11

(6)-4 Calendar and clock

To set the date and the clock time.

1. Press [MENU] 4 times.

4: SET MODE ?

2. Press [SET].

l: TIME SET ?

3. Press [SET].

ln4 .23 ’95 10:00

4. Enter the month, day, year and time using the number keys.

● The time must be entered using 24-hour system.

● The month, day and year should be entered as 2 digits each.

Example: to enter June 26, 1995, 12:00, press [0], [6], [2], [6],

[9], [5], [1], [2], [0] and [0].

5. Press [SET].

6. Press [STOP/C] to finish calendar/clock setting.

(~6 .26

’95 12:00

12: STAT10N coDE ?I

lJun .26

’95 12:001

● If you make a mistake move the cursor to the appropriate place, then enter the correct number.

Press [}] to move the cursor right.

Press [<] to move the cursor left.

12

2. PERIODICAL INSPECTION AND MAINTENANCE

2-1 Cleaning the housing (exterior plastic parts)

Gently wipe the housing with a soft, clean cloth dampened with a small amount of a neutral detergent.

● Do not use a cleaning agent such as alcohol or benzene.

2-2 Cleaning the document feed roller-2

If a streak or dirty pattern appears on a copy or a fax you have sent, clean the document feed roller-2 with a soft,

clean cloth dampened with a small amount of neutral detergent.

1. Open the operation panel.

2. In order to rotate the document feed roller-2, press the

document sensor as shown in the figure.

3. Clean the document feed roller-2 then dry it thoroughly

to prevent the document from jamming.

Docu

Document sensor

2-3 Cleaning the document feed roller-1

If the document jamming or overlapping frequently occurs, clean the document feed roller-1 with a cotton swab

dampened with a small amount of a neutral detergent.

1. Open the operation panel then pull the document

release lever as shown in the figure.

2,

3.

In order to rotate the document feed roller-1, press the

document sensor as shown in the figure.

Clean the document feed roller-l, then dry them

*

-l Document feed roller-1

thoroughly to prevent the document from jamming.

I \\

Document release lever

13

3. OUTLINE

(1) Part names and functions

Front view

Rear view and left side

Recording paper cover

Open button

I

Origina Itray

guide

Operation panel

l–

iml

OFF M H

/-’-w \\ \\~

M

LINE

Telephone

line jack

Original slot

Monitor volume control

Ringer volume control

[EEL]

~&,

Inner view

Extension

telephone

jack

ent sensor

older

t release

====P’e’’t

fee

~ Green release lever’

14

(2) Operation panel

Ill I

RESOLuTIONM

Uu ~uTo

o

0 i

ANSWER

JRCONTRAST SET RXMODE

I

1

I

o

0 c)

& o~+

\= ‘c

‘c 3

SPEAKER

?

TONE

e

REDIAUP

-0

HOLD

?

I

m-l-

1. Display ● Shows calendar and clock functions, operation guidance, machine status, etc.

2. One-Touch Keys sFrequently dialed numbers can be stored in memory using these 8 keys.

● Also used in programming.

[6]: 4 (function as backspace key)

[7]: } (moves cursor 1 to the right. Also functions as ENTER key in name programming.)

[8]: DELETE key

3. ERROR Lamp

● Lights if a communication error occurs.

4. [MENU] key ● Press this key when selecting various functions.

5. [SETl key

● Press this key to confirm selections.

6. AUTO Lamp

● Lights when the unit is set to AUTO mode.

7. [Rx. MODE] key

● Press this key to select a reception mode. AUTO, MANUAL or ANSWER.

8. ANSWER Lamp

● Lights when the unit is set to ANSWER mode.

9. [SPEED DIAL] key

● Press this key when using speed dial.

O.[REDIAUP] key

● Press this key to redial the last number dialed.

● Press this key to insert a pause between two digits in a number being dialed.

11. Number keys O-9 # *

● These keys are used to dial fax and phone numbers and to change various functions.

12. ~ONE] key

● Press this key to switch from pulse dialing to Touch-Tone dialing.

13. [SPEAKER] key

● Allows you to monitor a call without using the handset.

14. [HOLD] key

● Temporarily places a call on hold.

15. [CONTRASTl key

● Press this key to select contrast settings.

16. [RESOLUTION] key

● Press this key to select resolution settings.

17. [START’1 key

● Press to start transmission or manual reception.

18.[COPY] key

● Press to make a copy.

19.[STOP/C] key

● Press to interrupt transmission/reception/copying or to stop the ERROR lamp lighting.

● Press to cancel various setting and dialing functions and to remove an original document that has

been placed in the unit.

15

(3) Original documents precautions

■Transmitableoriginalsize

—

i

1.5m

(4.9’)

216 mm (8.5”)

*

B

Maximum

Insertion

direction

[

148mm “

(5.8”)

148 mm (5.8”)

4

Minimum

I

Insertion

direction

■Effective text width

208 mm (8.2”)

Note: An original other than specified should be reduced

or enlarged by the photocopier then the copy can

be used as an original document.

■Effective thickness

1 original sheet multi sheets

thickness 0.05-0.15 mm

0.08-0.13 mm

(per sheet) (0.002’’-0.006”) (0.003’’-0.005”)

Notes on the suitability of documents:

● Allow ink and/or glue to dry completely before inserting a document.

● Do not transmit curled or folded documents.

● Make sure that any paper clips, staples or pins have been removed from documents.

● When an original is carbon paper, waxed paper or vinyl-coated paper, use a photocopy of the original.

● Never use documents thicker than 0.15 mm(O.006”), metal sheets or cloth. Use a photocopy instead.

16

4. MECHANICAL OUTLINE

4-1 Transmission Mechanism

When, in Fig. 4-1, the document is inserted, the first sensor detects the document and the transmission motor

starts to rotate.

Subsequently, the automatic document feed roller rotates and the document is fed to the position of the

platen roller (start position of scanning document) and is stopped.

The automatic document feed roller also works for the separation of the document when multiple documents

are inserted.

When [START] or [COPY] button is pressed here, the transmission motor rotates again and the document is

fed forward scanning by CIS.

The 2nd sensor works for detecting the separation of the document and controls paper feeding for stop

position.

4-2 Reception Mechanism

As shown in Fig. 4-1, the recording paper is pressed by the platen roller and the thermal head. The platen

roller is rotated by the reception motor and feeds the recording paper forward.

When printing is finished, the recording paper is fed to the cutting position and it’s cut.

There are two sensors for the recording paper, one is for detecting the recording paper itself and the other is

detecting its jamming. It is noted that it will be a cause of recording paper jam when the recording paper is

not inserted straight or the roll is not tightened.

Original document pass

\

)

Rec

oiler 1)

detection sensor

Fig. 4-1

17

5. TROUBLE SHOOTING

5-1 Function description of each PCB

1.

M-1 PCB (Main PCB)

This PCB contains CPU and all of the control circuit.

The following functions are included.

l-l) LSI so called FAX ENGINE (TC35168F)

@ 8-bit CPU

@ MODEM

– Modulation and Demodulation

– Tone signal generation and detection

– DTMF signal generation

– Pre-recorded voice prompt generation

– Melody on hold

@)CODEC

– Coding and decoding of image signal

@ Image signal processor

– CIS (Contact Image Sensor) driver

– Convert analog signal to digital signal (two or multi values)

@ DMA (Direct Memory Access) controller

– This is used when transferring the data from image signal processor to line memory,

from line memory to MODEM, thermal head and CODEC.

@ Real time clock

0 Stepping motor control

@ 1/0 ports for

– Mechanism

– Operation Panel

– LCD control signal

1-2) Gate Array (LPD65622)

– 1/0 port for NCU and TEL. control signal

1-3) 512Kbit EP-ROM

– contains CPU control

1-4) 64Kbit SRAM

– This is used for temporary memory for image data memory and various data memory such

as Activity report, one touch & speed dial list, Feature switch & RAM CODE data and etc.

1-5) Memory back up control

– This is used for keeping the stored data of SRAM and real time clock.

1-6) NCU l/F circuit

– This circuit is used for connecting NCU (Network Control Unit) and MODEM.

2. M-2 PCB (Operation Panel)

– This PCB contains key matrix circuit controlled by ROW and COL signals and LED circuit.

18

3.

4.

5.

6.

7.

8.

M-3 PCB (NCU PCB)

– This PCB contains NCU (Network Control Unit) circuit which controls signals between telephone

network and facsimile.

@ Hookup detection

@ Ring signal detection

@ Dial pulse generation

@ Driver for CML and DP relays

@ Separation circuit for Transmission and Reception

M-4 PCB (Telephone PCB)

– This PCB contains telephone circuit.

The following functions are included,

~ Speech network circuit

@ Line monitor circuit

@ Ringer circuit

M-5 PCB (Reception mechanism control)

– This PCB contains driving circuit for Rx. stepping motor and cutter motor, and detection and jam

sensors for recording paper.

M-6 PCB (Transmission mechanism control)

– This PCB contains driving circuit for Tx. stepping motor and sensor circuit for original document.

M-7 PCB (Power supply)

– This is a switching

LCD display

– This contains 16x

9. Thermal head

power supply and outputs +5V, +/-12V and +24V.

1 line LCD with segment and common driver circuit.

– This contains 1728 dots (8-dot/mm) of heat generating elements and their driver circuit.

10. Contact Image Sensor (CIS)

– CIS converts scanned image to electrical signal.

11. Monitor speaker

– This is used for monitoring the line.

Monitor volume switch controls loudness of the monitoring sounds. It is mounted on the Telephone

PCB (M-4).

12. Ringer Buzzer

– This is used for generating

- Telephone PCB (M-4).

13. Handset

ringing sound and the loudness controls by the ringer switch mounted on

– This contains a microphone and speaker.

19

5-2 Trouble shooting for mechanical

SYMPTOM CAUSE

COUNTERMEASURE

The document does not feed when 1. The platen roller does not rotate.

1. Press green release lever, then

inserting. insert document again.

2. Dirt on the ADF roller. (roller 1) 2. Clean the ADF roller.

(See page 13)

3. The 1st sensor does not turn ON. 3. Check the 1st sensor operation.

(See page 17)

Multiple documents are fed at the

Dirt on the rubber sheet.

Clean the rubber sheet.

same time. (See page 30 Fig. 6-16)

The document is not fed straight,

1. The original guide is not adjusted 1. Adjust the original along with

along with the original. the original.

2. Dirt on the platen roller. (roller 2).

2. Clean the platen roller.

(See page 13)

3. Un even pressure for the CIS. 3. Adjust the pressure repositioning “

ClS.(See page 30)

Out of document area is reproduced

Dirt on the platen roller. (roller 2)

Clean the platen roller. (See page 13)

as blurred black.

When copying, white verlical line 1. Stains on the thermal head. 1. Clean the thermal head.

appears on the reproduced copy. (See page 30)

2. Heating elements of the thermal

2. Replace the thermal head.

head opens. (See page 30)

LCD shows “CHECK PAPER ROLL”. 1. No paper roll is placed. 1. Place a paper roll.

2. Recording paper sensor is not 2. Check sensor both electrically and

turned on. mechanically.

3. Paper roll is not placed properly. 3. Place the recording paper properly.

4. The recording paper cover is not 4. Close the recording paper cover

closed securely. securely.

No cutter works. Paper remains in the cutter position. Remove paper remains in the cutter

position then, confirm working.

If the problem still remains, replace

cutter. (See page 30)

~

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