Ricoh FAX2500L SPECIFICATIONS 3000 u

FAX3000L/3200L

SERVICE MANUAL

Throughout this manual, the machines are
referred to as follows.

Type A: FAX3000L
Type B: FAX3200L

WARNING

DANGER

INVISIBLE LASER RADIATION
WHEN OPEN AVOID DIRECT

EXPOSURE TO BEAM

DANGER

RAYON LASER INVISIBLE

LORS DE L’OUVERTURE

EVITER L’EXPOSITION DIRECTE

VORSICHT

Unsichtbare Laserstrahlung

unter dieser Abdeckung. Nicht

in den laserstrahl blicken.

PELIGRO

RADIACION LASER INVISIBLE

AL ABRIR. EVITAR LA

EXPOSICION DIRECTA AL HAZ

THIS MACHIN E CONTAINS A LASER BEAM GENERATOR. LASER

BEAM S CAN CAUSE PERM ANENT EYE DAM AGE. DO NOT OPEN

THE LASER UNIT O R LOOK ALONG TH E LASER BEAM PATH

WHILE THE M AIN POWER I S ON.

Lithium Batteries (Memory Back-up)
CAUTION:

The danger of explosion exists if a battery of this type is incorrectly replaced.
Replace only with the same or an equivalent type recommended by the
manufacturer. Discard used batteries in accordance with the manufactu rer’s
instructions.

OVERALL MACHINE INFORMATION November 30th, 1991
SPECIFICATIONS

1. OVERALL MACHINE INFORMATION

1.1. SP ECIFICATIONS

Type

Desktop transceiver

Circuit

PSTN, PABX

Connection

Direct couple

Document Size
Length: 105 - 1200 mm

[4.1 - 47.2 ins]
Up to 100 m [328 ft] after adjustment
Width: 148 - 304 mm

[5.8 - 12.0 ins]
Thickness: 0.05 to 0.2 mm

[2 to 8 mils]

Document Feed

Automatic feed, face down

ADF Capacity

50 sheets (using 20 lb paper)

Scanning Method

Flat bed, with CCD

Maximum Scan Width

256 mm [10.1 ins] ± 1%

Scan Resolution
Main scan: 8 dots/mm [203 dpi]
Sub scan:

Standard - 3.85 lines/mm [98 lpi]
Detail - 7.7 lines /mm [196 lpi]
Fine - 15.4 lines/mm [392 lpi]

Memory Capacity
ECM: 128 kbytes (double buffer)
SAF: Type A - 256 kbytes (14 pages)

Type B - 256 kbytes (14 pages), with
optional extra 1 Mbyte or 2 Mbytes
(max 71 or 128 pages respectively)

Compression

MH, MR, E FC, MMR , SSC
Storage to SAF memory for tx: MH
MMR only with ECM

Modulation

V.29 (QAM), V.27ter (PHM), V.21 (FM)

Data Rate

9600/7200/4800/2400 bps; automatic fallback

I/O Rate

With ECM : 0 ms/line
Without ECM: 5, 1 0, 20, or 40 ms/line

Transmi ssi o n Time

10 s at 9600 bps (G3 ECM using memory)
for a CCITT #1 test document (Slerexe let­ter) using standard resolution

Printing System

Las er printing, using the Ricoh CS (Compact
Seamless) E ngine, plain paper, dry toner

Pap er Size
Standa rd Cassette

Letter, Legal

Lower Ca ssette

Letter, Legal, A4, B4

Maximum Printout Width

210 mm [8.3 ins]

Ma ximu m Printer Resolutio n
Main scan: 16 dots per mm [406 dpi]
Sub scan: 15. 4 lines/mm [392 lpi]

Power Supply

115 ± 20 V ac, 60 ± 1 Hz

Power Consumption (Base Machine Only)
Standby: 40 W
Transmit: 50 W
Receive: 210 W
Copying: 300 W

Operating Environment
Temperature: 17 - 28 °C [63 - 82 °F]
Humidity: 40 - 70 %Rh

Dimensions (W x D x H)

496 x 459 x 293 mm [19.5 x 18.1 x 11.5 ins]
Excluding handset, trays, and optional units

Weight

19 kg [41.8 lbs]
Excluding handset, trays, and optional units

1

Protocol

Group 3 with ECM

1-1

November 30th, 1991 OVERALL MACHINE INFORMATION

FEATURES

1.2. FEATURES

KEY: O = Used, X = Not Used,

A = Type B with optional memory only,
B = Type B only

Equipment

ADF O
Bar code reade r X
Built-in handset X
Cabinet X
Connection for ans. machine X
Connection for handset O
Cutter X
Handset (option only) O
Hard disk X
Magnetic card reader X
Manual f eed mechanism O
Marker O
Microphone X
Monitor speaker O
R emaining memory indicator O
Speakerphone X

Video Processing Features

Contrast O
Halftone (B asic & Error Dif fusion) O
MTF O
Reduction O
R e s olution O
Smoothing to 16 x 15.4 l/mm O

Communication Features - Auto

Automatic fallback O
Automatic redialing O
Confidential reception A
Dual Acce ss O
Substitute r eception O
Transmission Reserve X

Communication Features -

User Selectable

Action as a transfer broadcaster X
AI Redial O
Alternative Destination O
Answering machine X
Authorize d Reception O
Auto-answer dela y time X
Auto dialing (pulse or DTMF) O
Auto Docume n t O
Automatic V oice Message X
Auto-note X
Batch Transmission (max 5 files) A
Broadcasting O
Chain Dialing O
Confidential ID O v erride O
Confidential Transmission O
Forwarding (4 stations) A
Fre e Polling O
Gr oups (7 groups) O
Hold X
Immediate Redialing O
Immediate transmission O
Keystr oke Program s O
Mailbox X
Memory transmission (this is the

default mode)
Notify X
On Hook Dial O
Page C ount O
Per sonal Codes O
Personal Codes with Conf ID O
Polling R eception O
Polling Transmission O
Quick Dial (32 stations) O
Reception mode s (Fax, Tel ,
Reduction O
Remote control features X
Remote Transfer X
Restricted Access (10 codes,

without cards)
Secured Polling O
Secured Polling with Stored ID

Override
Send Later O

Auto) O

O

O

O

1-2

OVERALL MACHINE INFORMATION November 30th, 1991
FEATURES

Communication Features -

User Selectable

Silent ringing detection X
Speed Dial (100 stations) O
Telephone Di rector y O
Tonal Signal Transmission O
Transfer Request O
Transmission Deadline X
Turnaround Polling X
Voice Request (immed. tx only) O

Communication Features -

Service Selectable

AI Short Protocol X
Auto-reduction override option O
Bus y tone detection O
Closed Ne twork (tx an d rx) O
Continuous Polling Re ception O
Dedicate d t x paramete r s O
ECM O
EFC O
MV1200 compatibility X
Page retransmission O
Page separation m ark O
Polling tx file lifetime in the SAF O
Protection against wrong conn. O
R esol’n stepdown override option X
Short Preamble O
W ell log O

Other User Features

Auto Service Call O
Ce n ter mark O
Checkered mark X
Clea ring a memory file O
Clea ring a polling file O
Clock O
Confidential ID O
Copy m ode O
Counters O
Dialed number check X
Direct entry of names O
Function Progr ams O
ID Code O
Label Insertion O
Language Selection O
LCD contrast control S ervic e

Memory L ock A
Memory L ock ID A
Modifying a memory file X
Mu lti So rt Document Rece p t ion A
Multicopy m ode A
Night Timer O
Own t elephone number O
Printing a memory file O
RDS on/off O
R eception Mode S witching T ime r X
Reception Time (non- memory rx

only)
Re mote ID X
R everse Order Printing A
RTI, TTI, CSI O
Speaker volume control O
Specified Cassette S election B
Substitute r eception on/off O
Telephone line type O
TTI on/off O
Use r Function Keys X
User Parameters O
Wild Cards O

Reports - Automatic

Charge Control Report X
Communication Failure Report O
Confidential File Report O
Error Report O
Memory Storage Report O
Mode Chan ge Report X
Polling Clea r Report O
Polling R eserve Report O
Polling R esult Report O
Power Failure Report O
TCR O
Transfer Result Report X
Transmission Result Report O

Reports - User-initiated

Authorized R eception List O
Charge Control Report X
File L is t O
Forwarding List A
Gr oup List O
Per sonal Code List O
Program List O

O

1

1-3

November 30th, 1991 OVERALL MACHINE INFORMATION

FEATURES

Reports - User-initiated

Quick Dial List O
Specified Cassette Selection List B
Speed Dial List O
TCR O
Transmission Status Report X
User Function List X
Use r Paramete r List O

Service Mode Features

Back-to-back t est O
Bit switch programming O
Buzzer test O
Cable equalizer (rx only) O
Comm. par ameter display O
DTMF tone test O
Echo countermeasure O
Error code display O
LCD contrast adjustment O
Memory file forwarding O
Memory file printout (all files) O
Modem te st O
NCU parameters O
Operation panel test O
Printer mechanism test X
Printer te st patterns O
Progra mmable atten u ation X
Protocol dum p list O
R AM display/rewrite O
RAM dump O
R inger tes t X
Scanner la mp test O
Scan n er mechanism test O
Sens or initialization X
Serial number O
Service m onitor repor t O
Serv ice s tation numbe r O
Syste m parameter list O
Technical data on the TCR O
T h ermal head parameters X
Transmission Status Report X

Memory Files

Max. number of files: 100
Max. number of stations/file: 142
Max. number of stations overall: 299
Max. number of pages overall: 200
(including pages stored as Auto
Documents)

1-4

OVERALL MACHINE INFORMATION November 30th, 1991
COM PONEN T LAYOUT

1.3. COMPONENT LAYOUT

1.3.1. Mechanical Components

1

14

15

16
17

18

19

20
21
22
23

24

13

12

11

10

2

6789

45

3

1

32

31

30

25

26

27

1. R2 Rollers Feed the document through the scanner.

2. Exposure Glass Exposes the original to light from the xenon lamp.

3. R1 Rollers Feed the document through the scanner.

4. Separat ion Roller Allows on e page i nto the scann er.

5. Document Feed Roller Feeds the document into the scanner.

6. Pick -up R oller Picks up pages of the document from the document
table .

7. Toner Cartridge This supplies toner to the development unit. It is part of
the CTM (Cleaning/Toner Magazine).

8. Charge Corona Unit This applies a charge to the master at the start of the
print cycle.

9. Quenching L amp This removes excess charge from the master at the end
of the print cycle.

10. Thermistor This me asures the temperature in the f using unit.

11 . H ot Roller Hea t from this r oller f uses the toner to the copy paper.

28

29

1-5

November 30th, 1991 OVERALL MACHINE INFORMATION

COM PONEN T LAYOUT

12 . H ot Roller Strippers These take the paper off th e hot roller af ter fusing.

13. Copy F eed-out R ollers These feed the paper out of the printer.

14. Pressure Roller (Fusing) This applies pressure to the paper during the fusing
process.

15. Cleaning Unit/Used Toner

Tan k

16. Transfe r C orona Unit This applies a charge to the paper to pull the toner off

17. Master Belt Also known as the CS (Compact Seamless) Engine. The

18. Registration R olle r This carries out the registration process.

19. Registration Sens or This dete cts when pape r is approaching the registra tion

20. Development Roller This roller applies toner to the latent image on the

21. Toner Supply Bar This feeds toner to the development roller.

22. Toner Mixing Bar This stirs up the toner in the development unit, so that it

23. Upper Rel ay Rollers The se fe ed paper from the u pper cassette into th e

24. Lower Relay Rollers These feed paper from the lower cassette into the

25. Lower Paper Feed Roller This feeds paper out of the lower cassette.

26. L owe r Paper Se pa ration

Roller

27. Lowe r Paper Pick-up Roller This picks up the t op sheet of paper from the stack in

28. Upper Paper Feed Rollers T hese pick up the top shee t of paper from th e stack in

29. Focusing Lens This focuses the laser beam onto the master belt.

30. Fθ Lenses These ensure that the thickness of the laser beam is

31. He xagonal Mirror This passes the laser beam across the mas ter belt.

32. CCD (Charge Coupled

Device)

This removes excess toner from the master after image
transfer and stores it. It is part of the CTM
(Cleaning/Toner Magazine).

the master a nd onto the copy paper.

latent image is writte n to this organic photoconductor
belt.

roller .

master belt.

does not collect into lumps.

printer .

printer.

This ensure s that only one shee t of paper at a time
leave s the lower cassette.

the lower cassette and pas ses it to the f eed roller.

the upper cassette a n d fe ed it into the printer.

uniform across the main scan.

This converts the light reflected from the document into
an analog video signal.

1-6

567

13

14

15

OVERALL MACHINE INFORMATION November 30th, 1991
COM PONEN T LAYOUT

1.3.2. Drive Components

18

2

1

3

4

8

1

9

17

16

19

12

20

10

11

1-7

November 30th, 1991 OVERALL MACHINE INFORMATION

COM PONEN T LAYOUT

1. Tx Motor This stepper motor drives the scanne r.

2. R2 Roller This feeds the original through the s canner.

3. Toner Supply Motor This dc motor drives the toner supply mechanism.

4. R1 Roller This feeds the original through the s canner.

5. Shutter Dri ve Gear This ensures that the shutter moves out of th e
document feed path at the correct time.

6. Toner Supply Gear (C TM) This ensure s the supply of toner from the CTM into the
development unit. It is part of the CTM.

7. Cleaning Brush Drive Gear This drives the cleaning brush in the C TM.

8. Hot Roller This fus es the toner to the copy pape r.

9. Copy Feed-out Roller This feeds printouts out of the machine.

10. Pressure Roller This applies pre ssure t o t he copy paper in t he fusing
unit.

11. Registration Roller Drive

Gear

12. Upper Paper Feed Motor This dr ives the paper feed mech anism in the upper

13. Development Roller Drive

Gear

14. Upper Paper Feed Roller

Drive Gear

15. Master Belt Drive Gear This drives the master belt.

16. Paper Feed Clutch This transfers drive from the upper paper feed motor to

17. Toner Supply Gear

(Development)

18. Ma in M otor T his brushless dc motor drives the ma s te r belt, fus ing

19. Lower Paper Feed Motor This drives the paper feed mechanism in the lower

20. Lower Paper Feed Clutch This transfers drive from the lower paper feed motor to

This drives the registration roller.

cassette.
This drive s the de velopme nt roller.

This drives the upper paper fee d roller.

the uppe r paper feed mechanis m.
This ensure s the collection of toner from the CTM, and

its distribution across the full length of the development
unit.

unit, development unit, and cleaning unit.

cassette.

the lower paper fe ed mechanis m.

1-8

16

24

9

12

OVERALL MACHINE INFORMATION November 30th, 1991
COM PONEN T LAYOUT

1.3.3. Electrical Components

1

13

11

2

3

4

5

1

10

8

37

35

34

36

14

14

15

15

6

7

17

18

19

20

33

32

31

30

29

28

27

26

21

22

23

25

1-9

November 30th, 1991 OVERALL MACHINE INFORMATION

COM PONEN T LAYOUT

Lower Ca ssette

44

43

42

Name Description No.

PCBs

FCU This board controls the machine. 11
MBU This board contains the system ROM and RAM for storing

system parameters such as bit switch settings and programmed

telephone numbers.
SBU This board contains the CCD. 1
OP- PORT Th is board controls t he operation panel. 37
NCU This board contains relays and switches for interfacing the

machine to the network and the handset.
PSU This board supplies power to the ma chine. 3
LD Unit This board drives the laser diode. 10
PF U T his board controls the lower paper fe ed unit. 4 4

MOTORS

Tx M otor This ste pper motor drives the scanner. 34
Main Motor This dc motor drive s the fusing unit, master belt, dev elopment

roller, and cleaning unit.
Upper Paper

Feed Motor
Lower Paper

Feed Motor
Toner Sup p l y

Moto r
Hexagonal Mirror

Motor
Ozone F an This removes ozone-laden air from the vicinity of the master unit,

This stepper motor drives the upper paper feed mechanism and

the registra ti on roller.

This stepper motor drives the lower pape r f eed mechanism. 43

This dc motor drives the toner s u pply mechanism. 33

This high-speed dc motor drive s the hexagonal mirror in the

lase r printer optics.

an d filter s out the ozone.

38

39

40

41

12

32

30

26

13

5

1-10

OVERALL MACHINE INFORMATION November 30th, 1991
COM PONEN T LAYOUT

Name Description No.

CLUTCHES

Upper Paper
Feed Clutch

Lower Paper
Feed Clutch

SENSORS

Docum ent Sensor This detects the presence of a document in the feeder. 36
Scan Line Se nsor This detects when a page is approaching the auto sha ding

Document Width
Sensor

Toner Near-end
Sensor

Upper Paper Size
Detector

Upper Paper End
Sensor

Registration
Sensor

Paper Feed-out
Sensor

Front Cover
Switch

CT M Sensor This detects when a CTM has been ins ta lled in the machine. 27
Lower Paper Size

Detector
Lower Paper End

Sensor
Lower Paper

Feed Sensor

INT ERLOCK S WITCHES

Front Cover
Interlock
Switches

OTHERS

Spe aker This allows the user to listen to th e condition of th e telephone

Xenon Lamp This lamp illuminates the document. 35
Xenon Lamp

Driver
Charge Corona

and Quenching
Lamp Unit

Transfer Corona
Unit

Varistor This ensures that the charge given to the master by the charge

Marker This stamps a re d circle on each page that is successf ully f ed

T h i s transfe r s drive from the upper pape r feed motor to the

paper feed roller in the upper cassette.

T h i s transfe r s drive from the lower paper feed motor to the paper

fee d roller in the lower cassette.

position.

This detects when a B4-width [10.1"] document has been placed

in the feeder.

This detects when the toner has almost run out. 17

T h i s de tects th e paper s i ze installed in th e upper cassette. Th e

use r mu st install th e correct actuator.

This detects when the paper in the upper cassette ha s run out. 29

This detects when paper has arrived at the re gis tra tion rollers. 21

This detects when the paper has been fe d out of the printer. 24

This detects wheth er the front cove r is open or closed. 23

T h i s de tects th e paper s i ze installed in th e lower cass ette. T h e

use r mu st install th e correct actuator.

This detects when the paper in the lower cas sette has run out. 3 8

This sensor detects the presence of paper at t he lowe r paper

feed roller.

If the front cover is open, these interlock switches interrupt the

+ 5VLD power supply for the laser diode and the + 24VD power

supply f or t he power pack, motors, and oth er componen t s.

line.

This drives the xenon lamp. 2

The charge corona unit charges the ma s te r belt a t the s ta rt of

the print cycle. The quenching lamp re move s excess charge

from the master belt at the end of the print cycle .

This pulls the toner off the maste r and onto the copy paper. 7

corona wire does not exceed -750 Volts.

through the scanner.

28

42

14

16

25

41

39

19,
20

31

18

9

15

1

1-11

November 30th, 1991 OVERALL MACHINE INFORMATION

COM PONEN T LAYOUT

Name Description No.

Power Pack This s upplies high voltages to the corona wires and the

developme nt bias terminal.
F using Lamp This fuses the toner to the paper. 6
Thermistor This monitors the te mperature inside the f us ing unit. 8
Thermostat This inte rrupts the ac power supply to the fusing lamp if the

temperature exceeds 400 °C.
Lower Cassette

Indicat or Pane l

T h i s conta i n s indicators to show the sta tu s of th e lower cass ette. 40

22

4

1-12

OVERALL MACHINE INFORMATION November 30th, 1991
OVERALL MACHINE CONTROL

1.4. OVERALL MACHINE CONTROL

HandsetLine

1

SBU

(CCD)

Scanner
Sensors

Operation

Panel

NCU

CONTROL SIGNALS

Video Processing

Memory

Video

Processor

Speaker

Modem AFE

CPU

DATA AND ADDRESS BUS

PSU

Port

Scanner and Printer Drive
Components and Sensors

FCU

I/O

RS-232C

Interface

Laser

Interface

Page

Memory

SAF

Memory

ECM

Memory

RAMROM

MBU

Laser Diode Driver
Main Scan Start Detector
Interlock Switch

The cpu on the FCU board controls the machine, as shown in the above
drawing.

There is no modem board in the machine. The cpu pe rforms the digital func­tions of a modem and carries out digital to analog conversion of facsimile
data. There is a separate analog modem chip, called the Modem AFE, which
does the rest of the modem operations.

1-13

November 30th, 1991 OVERALL MACHINE INFORMATION

VIDEO DATA PATH

1.5. VIDEO DATA PATH

1.5.1. Transmis sion

Original

Reference:

Group 3
Facsimile
Manual,
section
1-3-1

Xenon

Lamp

ECM

Memory

Line

Buffer

SAF

Memory

RAM

MBU

FIFO

Video

Processor

The fo llowing diag rams show
the data path for this model.

There is no pro­grammable resis-

CCD

Analog Signal

FCU

MODEM

AFE

Modem
(Digital)

Modem

(Analog)

Network

(via the NCU)

tor in this model.

CPU

To the

1.5.2. Reception

From the

Network

(via the NCU)

Reference:

Group 3
Facsimile
Manual,
section
1-3-2

Line

Buffer

RAM

MBU

FCU

Memory

SAF

FIFO

Filter

HYBRID IC

Memory

ECM

Page

Memory

Laser Diode

Modem

(Analog)

Modem

(Digital)

CPU

MODEM

AFE

Laser

Interface

Laser Diode

Driver

1-14

Copy Paper

OVERALL MACHINE INFORMATION November 30th, 1991
POWER DISTRIBUTI O N

1.6. POWER DISTRIBUTION

1.6.1. Distribution Diagram

Lower Paper Feed Motor
Lower Paper Feed Clutch

+24VD

1

AC Main

Power

Fusing

Lamp

PSU

AC Switching

Circuit

+24V

-12V

+24VS

+24VD

+5V

Scanner
Sensors

+5V

Operation

Panel

+5V

+24VD

Regulator

Regulator

+5V

+24VD

+5V

PFU

- 12V

+5V
+24VS

+24VS

+5V

NCU

FCU

- 5V

+12V

Sensors and

Indicators

FUSING UNIT

Thermistor

+5V

+5V

MBU

SAF Memory

+5V

SBU

+12V

+5V

Printer

Sensors

Front Cover

Interlock Switch

Front Cover
Microswitch

+5VLD

+5VLD

LDDR

Laser Diode

+24VD

Motors, Clutches, Lamps,
Marker, Power Pack

+5V

The laser diode is powered by a special + 5V supply, called + 5VLD.
There are two + 24V po wer supplies:

• + 24VS: This is always on when the main switch is on.

• + 24VD: Th is is interrupted if the front cover interlock switch opens.

There is no + 24VD activation sign al from the cpu to the PSU.

1-15

RS-232C

Interface

November 30th, 1991 OVERALL MACHINE INFORMATION

POWER DISTRIBUTI O N

1.6.2. Memory Back-up Circuit

Reference:

Group 3
Facsimile
Manual,
sect i o n 1-4-3,
Circuit type 1

+5V

Voltage

Detector

+24V

[A]

+5V

Switching

Circuit

Regulator

MBU

RAM

1-11

1-9

Battery

Switch

Battery

Switching

Circuit

FCU

17-11

17-9

Real Time

Clock

CPU

Memory
Monitor

SAF

Memory

Battery

Switch

[B]

Battery

The battery [A] on the MBU backs up the RAM on the MBU, which contains
system parameters. It also backs up the real time clock in the cpu. This bat­tery is not rechargeable. CN1-9 tells the cpu whether the back-up power
(CN1-11) comes from the battery or from the + 5V power supply.

A rechargeable battery [B] on the FCU board backs up the SAF memory and
the real time clock for 1 hour. While the main power is on, the + 24V supply
recharges the battery.

If there is data in the SAF memory, the rechargeable battery [B] also backs
up the real time clock, to preserve the MBU battery.

1-16

[A]

DETAILED SECTION DESCRIPTIONS November 30th, 1991
SCANNER

2. DETAILED SE CTION DESCRIPTIONS

2.1. SCANNER

2.1.1. Mechanisms

1. Document Detection

Document Table

Reference:

Group 3
Facsimile
Manual,
section
2-1-1.

• The scanner is B4-width [10.1"] , with a B4 document width detector [A].

The scanner can feed paper u p to 304 mm [12"] wide. However, only

10.1" of this width will be scanned. The extra width allows users to feed
wide originals with wide margins, such as computer form printouts.

• The scanner contains a xenon lamp.

• There is a fold-down extension [B] to suppo rt long d ocuments.

2

[B]

2-1

[A]

November 30th, 1991 DETAILED SECTION DESCRIPTIONS

SCANNER

Shutter

[C]

[B]

Reference:

Group 3
Facsimile
Manual, section
2-1-1.

In standby mode, tab [A] rests on cam [B]. When the tx motor starts, the mo­tor rotates forwards (white arrows), the cam lifts the tab, and the shutter [C]
rises. After the last page has been fed through the scanner, the tx motor re­verses (black arrows), the cam drops back to the standby position, and the
shutter blocks the scanner path again.

2. Pick-up and Feed

Drive Mechanism

Reference:

Group 3
Facsimile
Manual,
sect i o n 2-2-1.

[A]

[B]

[C]

This ma chine has a Mechanical Clutch Mechanism. The tx motor [A] drives
the feed roller [B] and pick-up roller [C].

Resoluti on

Standard - The tx motor fe eds the document at 7 . 7 lines/mm. T he video processor executes

OR processing to convert the data into 3.85 lines/mm.
Detail - The tx motor feeds the document at 7.7 lines/mm. There is no OR processing, and
the data is transmitted at 7.7 lines/mm.
Fine - The tx motor feeds the document and transmits data at 15.4 lines /mm. If the other termi­nal cannot receive at this re solution, alternate lines of data are deleted, so the effective resolu­tion of the transmitted data is 7.7 lines/mm.

2-2

DETAILED SECTION DESCRIPTIONS November 30th, 1991
SCANNER

Jam Conditions

The cpu detects a document jam if one of the fo llowing conditions occurs.

• Th e scan line sensor do es not switch on within 9 s of the Start key be-

ing pressed.

• The scan line sensor does not turn off after the maximum document

length has been fed since it turned on.

• The scan line sensor switches on while the document sensor is off.

• The document width sensor switches on while the document sensor is

off.

• The scan line sensor does not turn on within 5 s of the end of stamping,

if the document sensor is on.

Separation

Reference: Group 3 Facsimile Manual, section 2-2-2

2

3. Manual Feed

[B]

[A]

The manual feed button [A] lifts the separation roller [B] out of the doc um ent
feed path. There is no manual feed switch.

Reference: Group 3 Facsimile Manual, section 2-2-3

2-3

November 30th, 1991 DETAILED SECTION DESCRIPTIONS

SCANNER

2.1.2. Video Data Processing

Output from the CCD

A

Auto Shading

Memory

WHITE

WAVEFORM

FEEDBACK

Reference:

Group 3
Facsimile
Manual,
sect io n 2-3.

DC

Filter

VIDEO

PROCESSOR

Corrected Data from the Auto Shading Circuit

Amplifier

Gamma

Correction,

MTF

A/D

Converter

Data Processing

Circuits

Halftone

Process

Edge

Detection

To the CPU

and Modem

Basic

EDGE

ELEMENTS

Peak
Hold

CORRECTED

DATA

Error
Diffusion
Halftone

Process

Comparator

Background

Detection

OR

Processing

Reduction

A

NON-EDGE
ELEMENTS

Reduction

Halftone

B

Process Selector

To CPU and Modem

2-4

Image/Text

Detection

B’

DETAILED SECTION DESCRIPTIONS November 30th, 1991
PRINTER

2.2. PRINTER

2.2.1. Mechanisms

1. Master Unit

This printer uses a "write to black" system, using negative toner.
The master unit contains a durable OPC master belt. The expected lifetime of

each master unit is about 60,000 copies (this is the target value). Because of
this long lifetime, the user is not expected to change the master; there is no
Replace Master indicator.

The master belt does not have a bond seam, so no master home position de­tection is needed. There is also no master unit interlock switch; there is an in­terlock switch on the front cover.

[A]

2

[B]

The main motor [A] dr ives the master belt [B].

• At the start of printing, it turns on briefly and the master belt moves un-

der the quenching lamp to ensure that it is fully discharged.

• Then, when the fusing lamp is at the correct temperature and the page

memory contains a complete page of data, and the hexagonal mirror
motor is running at the correct speed, the main motor switches on
again.

• When the main motor is running at the correct speed, the laser diode

turns on for automatic power control.

Reference: Group 3 Facsimile Manual, section 4-1

2-5

November 30th, 1991 DETAILED SECTION DESCRIPTIONS

PRINTER

2. C harge Corona Unit

[D]

[B]

[E]

[A]

[C]

The charge corona unit [A] gives a -750 V charg e to the master belt. The
varistor [B] ensures that the charge does not exceed this value.

The connection between the power pack [C] and the corona unit is not bro­ken when the front cover is opened. However, the front cover interlock switch
cuts the + 24V power line to the power pack if the cover is opened.

The charge corona unit contains a wire cleaner [D].
The charge corona switches on at the same time as the laser diode starts its

power control procedure.
There is one ozone fan on the right hand side of the machine. It sucks air out

of the mac hine through the ozone filter, which is part of the ozone fan assem­bly. The ozone fan switches on when a ringing signal is detected, and stays
on until the fusing lamp temperature falls back below 130 °C at the end of the
printing run.

The inset shows how the grid plate [E] connects to the varistor.

Reference: Group 3 Facsimile Manual, section 4-2

2-6

DETAILED SECTION DESCRIPTIONS November 30th, 1991
PRINTER

3. Laser Optics

[E]

[F]

[B]

[D]

[A]

[C]

2

The optics are the same as those illustrated in section 4-3-3 of the Group 3
Facsimile Manual, except that there are two mirrors [A] at the "Second Mir­ror" position.

Other points to note are as follows:

• The focusing lens [B] is a barrel toroidal lens.

• The shield glass [C] pr events toner from entering the laser optics area,

and may need cleaning occasionally.

• An optical fiber [D] p asses the reflected laser beam to the main scan

start detector [E]. This detector is situated on the laser diode drive
board [F], unlike shown in the diagram.

• The strength of the b eam is 0.436 mW at a w avelength of 780 nm.

• The dimensions of the dot on the master belt are 65 µm (main scan di-

rection) by 75 µm (sub-scan direction).

The charge on the exposed parts of the belt drops to abo ut -150 V, while non­exposed areas remain at abo ut -750 V.

The laser engine characteristics are as follows (refer to page 4-3-21 of the
Group 3 Facsimile manual for background).

• Motor speed: 9,240 rpm

• Motor type: Hexagonal

• LD clock frequency: 5.3311 MHz

• Time between main scan synchronization signals: 1.082 ms

• Number of dots per main scan: 5769

2-7

[A]

November 30th, 1991 DETAILED SECTION DESCRIPTIONS

PRINTER

4. Development

Overview

This machine uses a ’write-to-black’ development system using negative
toner.

The toner cassette is part of a disposable unit known as the CTM (Clean­ing/Toner Magazine). The CTM contains a toner cassette, toner supply
mechanism, cleaning unit, and used toner tank. When the toner is all used
up, the CTM is replaced.

Reference: Group 3 facsimile Manual, section 4-4

Toner Supply

[B]

[C]

[E]

[D]

When a new CTM is installed in the machine and the front cover is closed,
the main motor and toner supply mo tor turn on. When the front cover is
closed, a tab [ A] on the fusing unit cover forces the hopper [B] to open.
Also, tab [C] on the CTM pushes bracket [D], which moves the CTM sensor
actuator into the sensor.

Continued on the next page

2-8

DETAILED SECTION DESCRIPTIONS November 30th, 1991
PRINTER

[F]

[H]

[I] [J]

[G]

[K]

The toner supply motor [F] drives the toner supply shaft ([E] in the diagram
on the previous page). This spiral shaft feeds toner to the hopper.

Inside the development unit is another spiral shaft [G]. This shaft, driven by
the main motor, distributes toner across the length of trough [H]. The toner
supply motor drives gear [I], and once every rotation, it tips the trough up­side down, dropping the toner into the development unit. A spring immedi­ately pulls the trough back upright so that it can continue to receive toner.

2

The toner m ixing b a r [J], driven b y the main motor, k eeps the toner agitated
as it builds up at the bottom of the development unit. The toner supply bar
[K] supplies toner to the development roller.

While toner is being supplied, th e main motor is also operating the toner near­end detection mechanism. When a fresh toner cassette is installed, the sen­sor detects toner near-end, because there is not much toner in the
development unit. When some toner has been transferred, the signal from
the toner near-end sensor returns to normal. About 22 s after that, the toner
supply motor stops and no more toner is transferred into the development
unit.

During printing, if toner near-end is detected, the toner supply mechanism will
start up again. Toner will be supplied until the sensor signal returns to nor­mal. If the toner cassette in the CTM is empty, no toner will be transferred,
and the sensor signal will not return to normal. If the sensor outputs the near­end signal for more than 5 minutes, the cpu blinks the Add Toner indicator.
See "Toner Near-en d Detection" fo r more details.

2-9

November 30th, 1991 DETAILED SECTION DESCRIPTIONS

PRINTER

Development Unit Drive

[A]

[B]

During p rinting, d rive from the main motor at gear [A] drives the development
roller [B]. The main motor also drives the master belt, so the development
roller and the master belt always move at the same time; therefore, no devel­opment clutch is needed.

Toner Near-end Detection

The toner near-en d det ection mechanism is exactly the same as described in
section 4-4- 4 of the Group 3 Facsimile Manual. The sensor signal is as
shown in the following diagram.

Reference:

Group 3
Facsimile
Manual,
sect i o n 4-4-4.

1.9 s

0.1 ms

The cpu starts to blink the Add Toner indicator under the following conditions:

• At power up: If the sensor output indicates toner near-end for 6 s

• During printing: If the sensor output indicates toner near-end for more

than 5 minutes, totaled over consecutive print runs (when the motor
stops, the sensor mechanism is deactivated, so time between printing
runs does not count towards the 5 minute time limit)

After 100 more pages have been printed, the Add Toner indicator remains lit,
and printing is disabled until a new CTM has been added.

2-10

DETAILED SECTION DESCRIPTIONS November 30th, 1991
PRINTER

Development Bias

[B]

[A]

2

The development bias and switching bias are supplied from the power pack
[A] at the same terminal [B].

• Development bias: - 530 ± 20 Vdc (BIASL)

• Switching bias: + 70 ± 20 Vdc (BIASH)

The switchin g bias is used at the following times :

• Between pages of a print run, while the development bias is off

• While toner is bein g transferred from the CTM to the development unit

2-11

November 30th, 1991 DETAILED SECTION DESCRIPTIONS

PRINTER

5. Paper Feed

There are two cassettes, a 250-sheet cassette, and a 500-sheet cassette. In
some models, the 500-sheet cassette is an optional unit.

The sizes of paper that the cassettes can take are listed in the specifications
(section 1-1).

[A]

Paper feeds from the rear towards the front. The lower paper feed path
bends upward thro u gh the front part of the upper cassette. The two p ap er
feed paths merge just before the registration roller [A].

2-12

[B]

[B]

DETAILED SECTION DESCRIPTIONS November 30th, 1991
PRINTER

Paper Lift

Standard Cassette

[C]

[A]

A mec hanical paper lift mechanism is used. When the us er places the cas­sette into the machine, a pin [A] in the base of the cassette activates a spring
loaded lever mechanism [B], which forces up the paper lift arm [C] until the
top of the stack touches the paper height positioner.

Lower Cassette

[A]

[C]

[E]

2

[D]

A mec hanical paper lift mechanism is used. When the us er places the cas­sette into the machine, a tab [A] on the rear of the cassette pushes a plate
[B] towards the rear of the machine as the user slides in the cassette. This
plate, driven by a spring [C], fo rces u p the paper lift arm [D]. The paper
height positioner [E] ensures that the paper is not pushed up too far.

Reference: Group 3 Facsimile Manual, section 4-5-2

2-13

November 30th, 1991 DETAILED SECTION DESCRIPTIONS

PRINTER

Pick-up and Feed Mechanism

Standard Cassette (Clutch Driven Single Roller Mechanism)

Reference:

Group 3
Facsimile
Manual,
sect io n 4-5-3.

[B]

[D]

[G]

[C]

[A]

[E] [F]

The upper paper feed motor [A] drives the pick-up and feed mechanism. The
paper feed clutch [B] transfers drive from this motor to the feed rollers [C].

When the paper feed clutch turns on, a metal plate [D] moves aw ay from
gear [E]. A pin [F] on this plate releases the gear, and the paper feed roller
turns. However, the clutch switches off after only 0.3 s, and a spring forces
the plate back to the starting position. After one revolution, the rib [G] on the
inside of the gear comes against the pin, and the paper feed roller stops.

When the page memory is full, the upper paper feed motor turns on. At the
beginning, it rotates at a slower speed (202.5 pps) to avoid excessive start­up noise and start-up current peak.

At 0.1 s after the main m otor reaches the correct speed, the motor turns at a
higher speed (405 pps). This higher speed, us ed for pick-up and feed, en­sures that time is not wasted getting paper into the printer. At the same time,
the upper paper feed clutch turns on and paper is fed into the printer.

Shortly after the registration sensor turns on, the main motor has the leading
edge of the paper, so the upper paper feed motor rotates at 202.5 pps again
to match the feed speed of the main motor.

When the trailing edge of the paper has left the registration sen sor, the pap e r
is no longer affected by the up per p aper feed motor. The upper paper feed
motor goes back to 405 pps ready for feeding the next page.

2-14

DETAILED SECTION DESCRIPTIONS November 30th, 1991
PRINTER

Lower Cassette (Clutch Driven Two Roller Mechanism)

Reference:

Group 3
Facsimile
Manual,
sect io n 4-5-3.

[A]

[C]

[D]

[E]

2

[B]

The lower paper feed motor [A] drives the lower paper feed mechanism, and
the lower paper feed clutch [B] transfers drive from the motor to the lower
pick-up [C] and feed [D] rollers at the correct time.

When the page memory is full, the lower pape r feed motor turns on. At the
beginning, it rotates at a slower speed (266 pps) to avoid excessive start-up
noise and start-up current peak. After 0.1 s, the motor rotates at a higher
speed (800 pps). This higher speed of rotation, used during pick-up and
feed, ensures that little time is wasted in getting paper out of the cassette and
into the printer.

When main motor lock is achieved, the lower paper feed clutch turns on and
paper is fed into the printer. Shortly after the paper feed sensor [E] is acti­vated, the clutch turns off.

After registration, the upper paper feed and main motors turn on to drive the
registration rollers and feed the pap er into the printer. However, rollers driven
by the lower paper feed motor still hold the t railing edge of the paper. So the
lower paper feed motor rotates at 266 pps to match the feed speed of the up­per feed and main motors.

When the trailing edge of the paper has left the paper feed senso r, the paper
is no longer affected by the lo wer paper feed motor. The lower paper feed
motor goes back to 800 pps ready for feeding the next page.

2-15

[B]

November 30th, 1991 DETAILED SECTION DESCRIPTIONS

PRINTER

Separation Mechanism

Standard Cassette
The standard cassette uses a semicircular roller and corner separator

method of separation.
Lower Cassette
This cassette uses a feed and reverse roller mechanism.

Reference: Gro up 3 Facsim ile Manu al (sect ion 4-5-4).

Registration

[C]

[D]

Reference:

Group 3
Facsimile
Manual,
sect io n 4-5-5.

[A]

[E]

Standard Cassette
There is no registration. This is because the upper paper feed motor [A]

drives the registration roller [B] and the upper paper feed rollers [C], and
there is no registration clutch. This means that the registration roller and the
paper feed rollers stop at exactly the same time.

Just after the paper’s leading edge reaches the registration sensor [D], the
upper paper feed motor stops briefly.

Lower Cassette
The upper paper feed motor is off when the leading edge of the paper acti-

vates the registration sensor. The lower paper feed roller [ E] continues to
feed the paper for a short while after this, so registration is done in the nor­mal manner (see section 4-5-5 o f the Group 3 Facsimile Manual).

2-16

[A]

DETAILED SECTION DESCRIPTIONS November 30th, 1991
PRINTER

Jam Detection

The machine detects a jam if one of the following conditions exists.

• The registration sensor or copy feed-out sensor is activated while the

machine is in standby m ode.

• The registration sensor s till detects paper 9.0 s after th e paper feed

clutch turned on.

• The copy feed-out sensor still does not detect paper 9.0 s after the pa-

per feed clutch turned on.

• The copy feed-out sensor still detects the presence of paper 9.0 s after

it first detected the latest sheet of paper.

• Standard Cassette Only: The registration sensor does not turn on within

2.0 s after the upper paper feed clutch turned on.

• Lower Cassette Only: The lower paper feed sensor does not turn on

within 1.2 s after the lower paper feed clutch turned o n .

There is no err or detection during paper lift.

2

Paper Size Detection

Reference:

Group 3
Facsimile
Manual,
sect io n 4-5-9.

[B]

For both cassettes, the paper size actuator [A] is on the front of the cassette.
The pa per size sensor [B] is a row of microswitches. The above diagram
shows the upper paper size sensor.

The cpu disables paper feed from a cassette if the paper size cannot be de­tec ted. If the paper size actuato r is miss ing or broken, or if there is no cas­sette in the cavity, the Add Paper indicator will light.

2-17

Lower Cassette

November 30th, 1991 DETAILED SECTION DESCRIPTIONS

PRINTER

Paper End Detection

Upper Cassette

[A]

[B]

Reference: Gro up 3 Fac sim i le Man ual , sec t io n 4-5-8.

[A]

[B]

In both cassettes, the paper end sensor actuator [ A] falls through a slot [B]
in the bottom of the tray.

There are no paper height sensors or paper near-end sensors.

Page Separation and Data Reduction

Incoming pages that are similar in length to the copy paper may be reduced
in the sub-scan direction to fit on the paper. Whether or not this happens de­pends on the settings of bits 1 and 2 of bit switch 02.

Reduction Enabled
If bit 2 of bit switch 02 is at 0, the data will be reduced in the page memory to

fit on the copy paper. However, data will only be reduced if the length of the
incoming page is between 5 mm shorter and a certain maximum length. This
maximum incoming page length that can be reduced depends on the copy
paper size and on the reduction ratio stored in RAM addresses 2404F and

24050.
Each paper size can be programmed with a separate reduction ratio. In each

of the two RAM addresses, there is one bit for each possible paper size. The
comb ination of the bit settings determines the ratio for that paper size.

Bit 7: Not used Bit 5: Legal Bit 3: A4 Bit 1: B5
Bit 6: B4 Bit 4: F4 Bit 2: Letter Bit 0: A5

The ratio is determined in accordance with the following table.

Bit in 2404F 0: 3/2 1: 4/3 0: 8/7 1: 12/11
Bit in 24050 0 0 1 1

2-18

DETAILED SECTION DESCRIPTIONS November 30th, 1991
PRINTER

The following table shows the maximum incoming page lengths that can be
reduced for each copy paper size. All lengths are in millimetres. The factory
setting of the reduction ratio is 4/3.

Copy

Pap er Type

A5 148 214.5 190.7 163.4 156
B5 182 265.5 236 202.3 193.1
Letter 279.4 385
A4 297 385
F4, F 330.2 385
Legal 355.6 385
B4 364 385

1

: The page memory cannot reduce incoming pages longer than 385 mm.

Copy Paper

Length

Maximum reducable incoming page lengths

Ratio = 3/2 Ratio = 4/3 Ratio = 8/7 Ratio = 12/11

1
1
1
1
1

365.9 313.6 299.3

1

385
385
385
385

1
1
1

333.7 318.5

371.7 354.8

385 1 382.5

385 1 385

1

The values are calculated as follows.
Maximum incoming page length that can be reduced =

(Copy Paper Length - 5) x Reduction Ratio

For example, for A5 with a reductio n ratio of 4/3

Max incoming data length = (148 - 5) x 4/3 = 190.7

Incoming pages that are longer than the maximum length will not be re­duced, but will be printed on two pages and treated in accordance with the
sett ing of bit 1 of bit switch 02. If this b it is 1, th e bottom few lines of the page
will be repeat ed at the top of the next page. If this bit is 0, the next page will
continue from where the first page left off.

2

Reduc tion Dis abled
If bit 2 of bit switch 02 is at 1, the data will not be reduce d. However, if the in-

coming page is up to x mm longer than the copy paper, the excess portion
will not be printed. The value of x can be from 0 to 15 mm. It is determined by
the setting of RAM addres s 24051 (copy mode: bits 3 to 0, receive mode:
bit s 7 to 4; bits 3 and 7 are the most significant bits).

Hex value Value of x

0 0
1 1

and so on until

15 15

Messages more than x mm longer than the copy paper will be printed out on
two pages in accordance with the setting of bit 1 of bit switch 02, as ex­plained above.

2-19

November 30th, 1991 DETAILED SECTION DESCRIPTIONS

PRINTER

Paper Size Selection

If there are two cassettes in the machine, the paper size to use is decided in
accordance with a few simple rules.

• If both cassettes contain the same paper size, the lower cassette will be

used.

• If the received page has to be split up and printed on two pages, both

pages will be the same size.

• If the cassettes contain different sizes, the paper size chosen for print-

ing the received fax m essage is selected in accordance with the follow­ing table of priorities. The table assumes that reduction is enabled and
that the reduct ion ratio is 4/3.

Paper Size
A5 Letter A4 F, F4 Legal B4

Recv’d
Fax
Mes­sage
Size

A5123456
Letter6(SR)12345
A4 6(SR) 2(R) 1 3 4 5
F, F4 6(SR) 5(R) 4(R) 1 2 3
Legal 6(SR) 5(R) 4(R) 3(R) 1 2
B4 6(SR) 5(R) 4(R) 3(R) 2(R) 1

• 1 is top priority.

• S: The data has to be separated and printed on more than one page.

• R: The data is reduced to fit on the printer paper.

• If Specified Cassette Selection has been switched on, messages from

specified senders will always go to the upper cassette, regardless of the
paper size or message size.

• Some of the reports can be printed on A5 paper without page separa-

tio n. However, if only A5 paper is in the cassettes, reports that need
larger paper sizes will require page separation.

2-20

DETAILED SECTION DESCRIPTIONS November 30th, 1991
PRINTER

6. Transfer Corona Unit

[B]

[A]

2

The voltage o f the transfer coro na unit [A] is between 3.8 and 5.5 kV. It gives
a 200 V charge to the paper to pull the negative toner off the master belt. The
bend [B] in the m aster belt also helps the paper to leave the belt. There is no
antistatic brush to aid separation.

Reference: Group 3 Facsimile Manual, section 4-6

2-21

November 30th, 1991 DETAILED SECTION DESCRIPTIONS

PRINTER

7. Fusing Unit

Fusing Unit Drive

[A]

The main motor [A] drives the fusing unit through a train of gears.

Fusing Unit Control

• Standby temperature: 65 °C

• Printing start tem perature: 130 °C

• Maximum printing temperature: 170 °C (monitored by a comparator)

• Thermistor maximum: 220 °C

• Thermostat maximum: 400 °C

When the main power is switched on, the fusing lamp heats up to 65 °C in
about 10 s.

When a ringing signal is detected (or when the user presses Start or Copy
for taking a copy), the fusing lamp heats up to 130 °C in about 15 s.

At the end of printing, the ozone fan stays on until the fusing unit temperature
has falle n below 130 °C.

Reference: Group 3 Facsimile Manual, section 4-7

2-22

[A]

DETAILED SECTION DESCRIPTIONS November 30th, 1991
PRINTER

8. Cleaning

[C]

[B]

[C]

[A]

2

The CTM c ontains the cleaning unit and the used toner tank.
When the CTM is out of the machine, the cleaning blade [A] is forced against

a mylar plate, which prevents used toner from falling out.
When the CTM is placed inside the machine, a tab on the copy exit cover

pushes plate [B], which moves the cleaning blade away from the mylar and
against the master belt.

The cleaning blade wipes toner off the master belt as it passes the cleaning
unit. The toner goes to the used toner tank. The cleaning roller [C], driven by
the main motor removes any toner that may remain attached to the cleaning
blade.

There is no toner overflow detection me chanism. This is because the used
toner tank is removed with the old CTM when the toner cassette is empty;
the toner near-end sensor detects this.

Reference: Group 3 Facsimile Manual, section 4-9

2-23

November 30th, 1991 DETAILED SECTION DESCRIPTIONS

PRINTER

9. Quenching

[A]

[B]

The quenching lamp [A] is an LED array. After quenching, the charge on t he
master [B] is about -20 V.

Reference: Group 3 Facsimile Manual, section 4-10

2-24

DETAILED SECTION DESCRIPTIONS November 30th, 1991
PRINTER

2.2.2. Circuits

1. Laser Diode

Laser Diode Drive

Front Cover

Interlock Switch

AC/DC

Converter

+24V

1-1

Front Cover
Microswitch

PSU

1-2

3-8

2-1

+5V

1-1

20-5

8-1

8-2

FCU

+5V

2

+24VD

+5VLD

9-1

1-8

LDDR

Laser
Diode

Controller

Laser
Diode

The laser diode is powered by a special + 5V supply, called + 5VLD.
There are two s witches activated by the front cover; the fro nt cover interlock

switch, and the front cover microswitch. If either of these switches is open,
the power supply to the laser diode is interrupted.

The laser diode is not started until the following conditions have been met:

• The main and hexagonal mirror motor s are rotating at the correct

speeds

• The page memory contains a complete page

• The fusing lamp is at the printing temperature

2-25

November 30th, 1991 DETAILED SECTION DESCRIPTIONS

PRINTER

Laser Diode Power Control

Laser

Power

Controller

1-2 1-4 1-5

DATA

Laser

Interface

Laser

Diode

LDDR

1-6

CONTROL FEEDBACKDISABLE

9-49-59-7

9-3

FCU

I/O

Port

CPU

The Laser Interface sends a constant signal to the laser diode on CN9-7, forc­ing the diode to stay on. The feedback signal returns to the FCU on CN9-3. If
necessary, the cpu adjusts the laser diode power to the correct value by alter­ing the control signal (CN9-4).

If the cpu determines that laser diode power control has failed, it sends CN9­5 to low, which disables the laser diode.

Service Note

If one of the following occurs, the printer will be disabled, and an Auto Serv­ice Call will be sent to the service station (the message will be LD POWER
CONTROL FAILURE).

• If there is no response to laser power control (the cpu sends CN9-5

low).

• If the laser diode power supply (+ 5VLD) is cut.

2-26

DETAILED SECTION DESCRIPTIONS November 30th, 1991
PRINTER

2. Fusing Unit

FUSING UNIT

Fusing

Lamp

Thermistor

36-2

+5V

36-1

LIVE

NEUTRAL

170 C [A]

4-1,4

4-3,6

36-3

I/O

Port

AC Switching

Circuit

3-1

36-4

[B]

PSU

3-2

[C]

1-8

Main

Power

Supply

1-7

2

FCU

The circuit shown in the above diagram controls the fusing unit.

• The I/O Port monitors the fusing unit temperature at CN36-1.

• The signal at CN36-4 (from the comparator [A]) remains low if the fus-

ing unit temperature is below 170 °C.

• The I/O Port switches the fusing unit on/off using signal [B].

• If the thermistor is accidentally disconnected, the link between CN36-3

and CN36-4 will also be broken. When the cpu detects this, an Auto
Service Call will be sent.

Standby mode

• If the fusing lamp is below 65 °C, t he I/O Port sends signal [B] low,

which makes CN1-8 go high. This switches on the fusing lamp.

• If the fusing lamp goes abo ve 65 °C, [B] goes high, and CN1-8 goes

low, which switches off the fusing lamp.

Continued on the next page

2-27

November 30th, 1991 DETAILED SECTION DESCRIPTIONS

PRINTER

Printing

• When a rin ging signal is detected, CN1-8 goes high, to switch on the

fusing lamp. Also, the ozone fan switches on.

• During printing, the temperature is kept at 170 °C. If the temperature

rises above 170 °C, the output from the comparator changes state.
CN36-4 goes high, while [B] remains low. This causes CN1-8 to go low,
which switches off the fusing lamp.

• If the comparator fails, there are additional safety cutoffs at 220 °C (ther-

mistor) and at 400 °C (thermostat).

After printing

• When the fusing lamp temperature falls back below 130 °C, the ozone

fan switches off.

Service Note

When one of the following error conditions occurs, the I/O Port switches off
the fusing lamp by raising CN1-7 to high. The printer will be disabled, and an
Auto Service Call will be sent to the service station (the message will be HOT
ROLLER DOWN).

Standby mode

• If the fusing lamp takes more than 30 s to reach 65 °C

During printing

• If the fusing lamp takes more than 40 s to r ise to 130 °C from 65 °C

• If the fusing lamp stays above 170 °C for more than 5 s

After printing

• If the fusing lamp takes more than 10 minutes to fall back to 130 °C

At any time

• If the fusing lamp temperature reaches 220 °C

• If the thermistor is accidentally disconnected (see the previous page for

details)

2-28

DETAILED SECTION DESCRIPTIONS November 30th, 1991
PCBs AND THEIR FUNCTIONS

2.3. PCBs AND THEIR FUNCTIONS

2.3.1. FCU

HandsetLine

SBU

(CCD)

Scanner
Sensors

Operation

Panel

Speaker

Modem AFE

CONTROL SIGNALS

Video Processing

Memory

Video

Processor

NCU

CPU

HIC

PSU

I/O

Port

Scanner and Printer Drive
Components and Sensors

2

FCU

RS-232C
Interface

MBU

DATA AND ADDRESS BUS

Laser

Interface

Page

Memory

SAF

Memory

ECM

Memory

RAMROM

Laser Diode Driver
Main Scan Start Detector
Interlock Switch

2-29

November 30th, 1991 DETAILED SECTION DESCRIPTIONS

PCBs AND THEIR FUNCTIONS

1. CPU (AFSP)

• 65C02 compatible microprocessor

• Interrupt control

• DMA control

• Data compression and reconstruction (high speed MH coding for 4.5-

second scanning)

• Modem (digital operations)

• Real time clock (battery backed-up)

• Memory control

• Control of all mechanisms (directly or through other chips)

• NCU control (through the I/O Port)

2. I/ O Port (LIOP)

• Clock control

• Sensor monitoring (including A/D conversion where necessary)

• Tone detection

• Motor drive

• Operation panel control

• Laser Interface control

3. Laser Interface (LIF)

• Page memory control

• Laser diode control

• Smoothing

4. Modem Analog Front End (Modem AFE)

• Modem (analog operations)

• Attenuation

5. Video Processor (VPP)

• Analog/digital video signal processing

6. Hybrid IC (HIC)

• Filters

7. RAM

• 128k for ECM (no back-u p)

• 256k SAF memory (with battery back-up)

• 768k page memory

2-30

DETAILED SECTION DESCRIPTIONS November 30th, 1991
PCBs AND THEIR FUNCTIONS

2.3.2. MBU

System

ROM

DATA AND ADDRESS BUS

Memory Back-up

Control

+

To/From

FCU

1. System ROM

• Contains the software to run the machine

MBU

2

System

RAM

To/From

FCU

2. System RAM

• 32k SRAM and 32k PSRAM for parameter storage, line buffer, FIFO,

SAF memory administration

The SRAM is backed up by the battery on the MBU.

2-31

November 30th, 1991 DETAILED SECTION DESCRIPTIONS

PCBs AND THEIR FUNCTIONS

2.3.3. SBU

Analog Video

To the FCU

Drive Clocks

From the FCU

Drivers

CCD

+12V

+12V

+

Emitter

Follower

Inverter

Amplifier

SBU

2.3.4. OPU

LCD Panel

LCD Panel

Controllers

Operation Panel

Keys

Operation Panel

Operation Panel

Controller

Serial Interface

To/From FCU

LEDs

Output

from the
Scanner
Sensors

2-32

DETAILED SECTION DESCRIPTIONS November 30th, 1991
PCBs AND THEIR FUNCTIONS

2.3.5. LDDR

2.3.6. PFU

Lower Cassette

Sensors

DATA

Laser

Power

Controller

CONTROL

To/From FCU

PFU

POWER

Indicator

Panel

Lower Cassette

Controller

Driver

Laser

Diode

LDDR

2

Lower Cassette

Mechanical

Components

Serial Interface

To/From FCU

2-33

November 30th, 1991 DETAILED SECTION DESCRIPTIONS

PCBs AND THEIR FUNCTIONS

2.3.7. NCU

TIP

RING

T1

R1

To

Network

To

Handset

Protection

Circuit

FG

Line

Current

Detector

Oh

Relay

Di Switch

Ringing

Signal

Detector

Tx/Rx Data

To/From FCU

To FCU

+24V

Off-Hook

Detector

From FCU

To FCU

NCU

• For simplification, relay drive signals and detector outputs to/from the

FCU are not shown on this diagram.

• In the above diagram, the relays are shown in the standby position for

Auto Receive (Fax) Mode.

2-34

DETAILED SECTION DESCRIPTIONS November 30th, 1991
PCBs AND THEIR FUNCTIONS

2.3.8. PSU

LIVE

NEUTRAL

GROUND

AC Power

to the

Fusing Lamp

Prevention

Arrestor

Fusing Lamp

Enable

From FCU

Surge

+24VD

AC Switching

Circuit

To

FCU

Main

Switch

+24VD

From

Front Cover

Interlock

Switch

Noise

Filter

+24V

To

Front Cover

Interlock

Switch

Surge Current

Prevention

+24V

To

FCU

Power Supply

Generation

Circuits

+5V

To

FCU

PSU

2

-12V
To

FCU

Overhea t Protection in the PSU

If the PSU thermistor temp erature exceeds about 100 °C, the power supply
outputs from the PSU are disabled.

If this happens:

1. Switch off t he machine.

2. Take out the PSU and examine it for damage. Take care because it may
be hot.

3. Put back the PSU and switch the machine on. If the machine does not op­erate, change the PSU.

2-35

INSTALLATION November 30th, 1991
CONNECTING UP THE MACHINE

3. INSTA LLA TION

3.1. CONNECTING UP THE MACHINE

POWER SWITCH

115 ± 20V
60 ± 1 Hz
Grounded

3

Phone
Company’s
Jack

HANDSET

3-1

Installation Procedure

1. Install the master unit. (refer to the Installation Manual for Ricoh Master Unit Type 30)

2. Install the toner cartrige. (refer to the Installation Procedure on the carton box)

3. Install the handset and connect the line. (refer to the Installation Manual)

4. Install the paper cassette. (refer to the Operation Manual)

5. Attach the trays and document table.

[B]
[A ]: 1 screw

November 30th, 1991 INSTALLATION

INSTALLING ADDITIONAL UNITS

3.2. INSTALLING ADDITIONAL UNITS

3.2.1. Lower Cassette

Check whether there are any messages in the memory. If there are, you
must install the lower cassette and turn the power back o n within an hour.

[A ]

[B]

[D]

[C]

[C]

Fit pegs [B] into holes [C].

[D]: 5 screws

3-2

[F]

[G]

[H]

INSTALLATION November 30th, 1991
INSTALLING ADDITIONAL UNITS

[F]

[E]

[E]: 2 connectors

3

Re move two screws [F].

[G]

Install brackets [G] (2 screws each).
Screws [H]: Use previously re moved
screws [F].
Screws [I]: In the accessories bag.

[I]

3-3

November 30th, 1991 INSTALLATION

INSTALLING ADDITIONAL UNITS

[J]

Adjust the cassette in accordance
with customer requirements.

3-4

INSTALLATION November 30th, 1991
INSTALLING ADDITIONAL UNITS

3.2.2. Memory Card

• Tur n off the power before installing or removing a memory c a rd.

• Make sure that 100% is displayed on the operation panel before install-

ing or removing a memory card, or data will be lost.

3

3-5

November 30th, 1991 INSTALLATION

INSTALLING ADDITIONAL UNITS

3.2.3. Cassette (250 Sheets)

3-6

INSTALLATION November 30th, 1991
INSTALLING ADDITIONAL UNITS

3.2.4. Cassette (500 Sheets)

3

3-7

[B]: 2 screws

November 30th, 1991 INSTALLATION

INSTALLING ADDITIONAL UNITS

3.2.5. Handset

[A]

[A]: 2 screws

[B]

3-8

INSTALLATION November 30th, 1991
INITIAL PROGRAMMING

3.3. INITIAL PROGRAMMING

Check the following:

• Is the country code in the NCU parameters (Function 96, parameter 00)

correct for the country of installation? In the USA, it should be 17.

• Do any bit switch or other settings have to be changed to match line

conditions or user requirements?

• Have you programmed the serial number (Function 98, section 4-1-18)?

The user should program the following items after installation:

• Telephone Line Type

• RTI, TTI, and CSI

• ID Codes (ID Code, Remote ID, Confidential ID, Memo ry Lock ID)

• The fax mac hine’s own teleph one number

• Date and Time

• Language Selection

3

3-9

SERVICE TABLES AND PROCEDURES November 30th, 1991
SERVICE LEVEL FUNC TIONS

4. SERVICE TABL ES A ND PROCEDURES

4.1. SERVICE L EVEL FUNCTI ONS

4.1.1. Bit Switch Programming (Function 91)

1. Function 5 1 9 9 1

then immediately Yes

2. 9 1 Yes

FUNCTION Y/∇
9 SERVIC E FUNCTI ONS

DEFAULT: 0000 0000
BITSW 00: 0000 0000

Bit 7 is displayed at the left, and bit 0 at
the right.

3. Increment bit switch: #
Decrement bit switch:

*

Example: Display bit switch 3: # x 3 DEFAULT: 0000 0000

BITSW03: 0000 0000

4. Adjust the bit switch.
Example: To change the value of bit
7, press 7

DEFAULT: 0000 0000
BITSW03: 1000 0000

5. Either:

• Adjust more bit switches - go to step 3.

4

• Finish - Function

4.1.2. System Parameter List (Function 92)

1. Function 5 1 9 9 1

then immediately Yes FUNCTION Y/∇

9 SERVIC E FUNCTI ONS

2. 9 2 Yes START

SYSTEM REPORT

3. Start
After printing, press Function

4-1

November 30th, 1991 SERVICE TABLES AND PROCEDURES

SERVICE LEVEL FUNC TIONS

4.1.3. Error Code Display (Function 93)

1. Function 5 1 9 9 1

then immediately Yes FUNCTION Y/∇

9 SERVIC E FUNCTI ONS

2. 9 3 Yes ERROR CODE #/∇

1-01 JAN 01 17:30

3. Either:
Scroll through the error codes - #

Finish - Function

4.1.4. Service Monitor (Function 93)

1. Function 5 1 9 9 1

then immediately Yes FUNCTION Y/∇

9 SERVIC E FUNCTI ONS

2. 9 3 Yes ERROR CODE #/∇

1-01 JAN 01 17:30

3. No/∇ Start

4.1.5. Protocol Dump (Function 94)

1. Function 5 1 9 9 1

then immediately Yes FUNCTION Y/∇

9 SERVIC E FUNCTI ONS

2. 9 4 Yes

START
PROTOCOL DUMP LIST

3. Start

4-2

SERVICE TABLES AND PROCEDURES November 30th, 1991
SERVICE LEVEL FUNC TIONS

4.1.6. RAM Display/Rewrite (Function 95)

1. Function 5 1 9 9 1

then immediately Yes FUNCTION Y/∇

9 SERVIC E FUNCTI ONS

2. 9 5 Yes Y/∇

DISPLAY MEMORY

3. Ye s ADDRESS = 2044C

DATA = 03

4. Input the address that you wish to see. Example: Addr ess 20202

2 0 2 0 2 ADDRESS = 20202

DATA = 00

Note: The first digit must always be 2.

5. If you wish to change the data, type in the new data.

Example: 80, press 8 0 ADDRESS = 20202

DATA = 80

Note: If you wish to move the cursor, press

→

6. Either:

• View more addresses - go to step 4.

• Finish - Yes Function

4.1.7. RAM Dump (Function 95)

1. Function 5 1 9 9 1

then immediately Yes FUNCTION Y/∇

9 SERVIC E FUNCTI ONS

2. 9 5 Yes Y/∇

DISPLAY MEMORY

3. ∇ Ye s MEMORY DUMP START/N

B= 2, ST-0000,END-00FF

4

4. Input the bank number (B) and the start and
end addresses. Max. range: 256 bytes

Example: Start at 1200, end at 12FF.

1 2 0 0 1 2 F F Start MEMORY DUMP START

4-3

The value of B is always 2.

B= 2, ST-1200,END-12FF

November 30th, 1991 SERVICE TABLES AND PROCEDURES

SERVICE LEVEL FUNC TIONS

4.1.8. NCU Parameters (Function 96)

1. Function 5 1 9 9 1

then immediately Yes FUNCTION Y/∇

9 SERVIC E FUNCTI ONS

2. 9 6 Yes NCU PARAMETER KPAD/Y

NO.00 001

3. Scroll through the parameters - Yes
Enter new values at the keypad.

Example: Set NCU parameter 04 to 005.

Yes Yes Ye s Ye s 0 0 5 NCU PARAMETER KPAD/Y

NO.04 005

4. To finish: Function

Note: Parameter 00 is the Country Code, and Parameter 01 is the Tx Level

(if the Tx level should be -9 dB, input 9).
Refer to section 4-3 for full details on NCU parameters.

4.1.9. ADF Test (Function 97)

1. Function 5 1 9 9 1

then immediately Yes FUNCTION Y/∇

9 SERVIC E FUNCTI ONS

2. 9 7 Yes

3. 1

SCN-1 DT-2 PL-3 LD-4
MDM -5 RI-6 CK-7 SN-8

SCANNER TEST KPAD
ADF-1 LAMP-2

4. 1

5. Function Function

6. Place a docu ment in the feeder,
then press Copy Start

4-4

SERVICE TABLES AND PROCEDURES November 30th, 1991
SERVICE LEVEL FUNC TIONS

4.1.10. Xenon Lamp Test (Function 97)

1. Function 5 1 9 9 1

then immediately Yes FUNCTION Y/∇

9 SERVIC E FUNCTI ONS

2. 9 7 Yes SCN-1 DT-2 PL-3 LD-4

MDM -5 RI-6 CK-7 SN-8

3. 1 SCANNER TEST KPAD

ADF-1 LAMP-2

4. 2 SCANNER LAMP TEST

The xenon lamp lights up for 5 minutes.

4.1.11. DTMF Tone Test (Function 97)

1. Function 5 1 9 9 1

then immediately Yes

2. 9 7 Yes

3. 2

FUNCTION Y/∇
9 SERVIC E FUNCTI ONS

SCN-1 DT-2 PL-3 LD-4
MDM -5 RI-6 CK-7 SN-8

DTMF TEST
DUAL-1 SINGLE-2

4. Either:

• Test dual tones - 1 . Go to step 5.

• Test single tones - 2 . Go to step 8.

5. The display is as shown opposite. DUAL TONE

PRESS KEYPAD

Press a key on the ten key pad.
Example: 1 Start

4

6. To stop the test: Stop

7. Either:
Test another tone: Go to step 5.

Finish: Function

4-5

November 30th, 1991 SERVICE TABLES AND PROCEDURES

SERVICE LEVEL FUNC TIONS

8. The display is as shown opposite.

Press the required key.

697 Hz 1 852 Hz 3 1209 Hz 5 1477 Hz 7
770 Hz 2 941 Hz 4 1336 Hz 6 1633 Hz 8

Example: To test 1633 Hz, press 8 Start

9. To stop the test: Stop

10. Either:
Test another tone: Go to step 8.
Finish: Function

4.1.12. Printer Test Patterns (Function 97)

SINGLE TONE
PRESS KEYPAD

1. Function 5 1 9 9 1

then immediately Yes FUNCTION Y/∇

9 SERVIC E FUNCTI ONS

2. 9 7 Yes SCN-1 DT-2 PL-3 LD-4

MDM -5 RI-6 CK-7 SN-8

3. 3 PATTERN PRINT KPAD

1-7

4. Press a key from 1 to 7, excluding 5 and 6. (Patterns 5 and 6 are not
used in this model.) A test pattern is printed.

4.1.13. Operation Panel Test (Function 97)

1. Function 5 1 9 9 1

then immediately Yes FUNCTION Y/∇

9 SERVIC E FUNCTI ONS

2. 9 7 Yes SCN-1 DT-2 PL-3 LD-4

MDM -5 RI-6 CK-7 SN-8

3. 4

4-6

SERVICE TABLES AND PROCEDURES November 30th, 1991
SERVICE LEVEL FUNC TIONS

4.1.14. Modem Test (Function 97)

1. Function 5 1 9 9 1

then immediately Yes FUNCTION Y/∇

9 SERVIC E FUNCTI ONS

2. 9 7 Yes SCN-1 DT-2 PL-3 LD-4

MDM -5 RI-6 CK-7 SN-8

3. 5 MODEM TEST

G3-1 TONE-2

4. Either:
Test G3 carrier signals - 1 . Go to step 5.

Test frequencies - 2 . Go to step 8.

5. The display is as shown opposite. 9600-1 7200-2

4800-3 2400-4 300-5

Press the required key.
Example: Test the 9600 bps carrier 1 Start

6. To stop the test: Stop

7. Either:
Test another tone: Go to step 5.

Finish: Function

8. The display is as shown opposite. 2100-1 1100-2 800-3

PRESS KEYPAD

Press the required key.
Example: To test 1100 Hz, press 2 Start

9. To stop the test: Stop

10. Either:

• Test another tone: Go to step 8.

4

• Finish: Function

4-7

November 30th, 1991 SERVICE TABLES AND PROCEDURES

SERVICE LEVEL FUNC TIONS

4.1.15. Ringer Test (Function 97)

Not used; do not try to use this function.

4.1.16. Buzzer Test (Function 97)

1. Function 5 1 9 9 1

then immediately Yes

2. 9 7 Yes

FUNCTION Y/∇
9 SERVIC E FUNCTI ONS

SCN-1 DT-2 PL-3 LD-4
MDM -5 RI-6 CK-7 SN-8

3. 7
Press the St op key to stop the buzzer.

4.1.17. Ozone Fan Test (Function 97)

1. Function 5 1 9 9 1

then immediately Yes FUNCTION Y/∇

9 SERVIC E FUNCTI ONS

2. 9 7 Yes SCN-1 DT-2 PL-3 LD-4

MDM -5 RI-6 CK-7 SN-8

3. 8
Press the Function key to stop the fan.

4.1.18. Serial Number (Function 98)

1. Function 5 1 9 9 1

then immediately Yes FUNCTION Y/∇

9 SERVIC E FUNCTI ONS

2. 9 8 Yes

SERIAL # KPAD

3. Enter the machine’s serial no at the keypad.

SERIAL # KPAD/Y/N
7940479186

To correct a mistake: No

4. If the display is correct: Yes

4-8

SERVICE TABLES AND PROCEDURES November 30th, 1991
SERVICE LEVEL FUNC TIONS

4.1.19. Service Station Telephone Number (Function 99)

1. Function 5 1 9 9 1

then immediately Yes FUNCTION Y/∇

9 SERVIC E FUNCTI ONS

2. 9 9 Yes TEL NUMBER KEYPAD

3. Input the telephone number of the service station that will receive Auto
Service calls from this machine.

TEL NUMBER KPAD/ Y/N
2125555242

4. Yes Function

4.1.20. Bypassing Restricted Access

Use this procedure if the user has switched on Restricted Access. This en­ables you to use the machine without having to input a Personal Code. It is
also useful if the user cannot operate the machine because they cannot re­member any of the Personal Codes.

1. 2 2 2 2

2. Immediately press Quick Dial key 11

Then operate the machine as you wish. When the machine is returned to
standby mode, Restricted Access is reimposed immediately.

4.1.21. Printing all Memory Files (Function 24)

First, set bit 5 of bit switch 01 to 1.

1. Function 2 4 Yes FI LE NO

2. Press No/∇ Ye s Start .

4

All files in the memory, including confidential messages, will be printed one by
one. The files will not be erased.

After you have finished, set bit 5 of bit switch 01 back to 0.
Note: To erase memory files, set bit 2 of bit switch 00 to 1. All files will be

erased, and some RAM addresses will also be cleared.

4-9

November 30th, 1991 SERVICE TABLES AND PROCEDURES

BIT SWI TCHES

4.2. BIT SWITCHES

WARNING

Do not adjust a bit switch that is described as "Not used", as this

may cause the machine to malfunction or to operate in a manner

that is not accepted by local regulations. Such bits are for use only

in other areas, such as Japan.

Bit Switch 00

FUNCTION COMMENTS

0 MTF process

0: Enabled 1: Disabled

1 RAM reset level 2

1: Reset

2 R AM reset level 3

1: Reset
Note: RAM reset level

1 is a RAM
adjustment. It is not
described in this
manual.

3 Memory file forwarding

1: F orwa rd the f i les

4 Inclusion of technical

data on the TCR

0: No 1: Yes

5 Monitor speaker

during video data
communication (tx
and rx)

0: Disabled 1: Enabled

6 Not used Do not cha n ge the factory setting.

Continued on the next page

0: The MTF proces s is used when required by the software.
1: The MTF process is never used.

When this bit is set to 1, all items stored in the RAM are reset
except the cl ock , and then this bit changes back to 0
automatically. Also, all image files in the SAF memory are
erased.

When this bit is set to 1, some items stored in the RAM are
reset, then this bit changes back to 0. All items are reset
except the bi t switch and NCU paramete r settin gs, clock,
own tel. no., CSI, R TI, TTI, Quick Dials, Speed Dials, Groups,
and the TCR memory. Also, all image files in the SAF
memory are erased.
This bit switch is recommended for use when it is necessary
to cle ar the SAF, as fewer RAMs will nee d reprogramming.

Use this if the printer does not work, but the user wis hes to
print the files. F irst, change the fax machine’s tele phone
number (Function 51) to the number to which you wis h to
forwar d the files, then set thi s bit to 1. All fi les i n the me mory
will be forwarded. This bit resets to 0 automatically. However,
you must return the fax machine’s tele phone number to the
original setting. The file s stay in memory.

1: Instead of the personal code, the f ollowing data are listed
on the TCR as a six-figure number.
Fi rst t wo num bers: F inal modem rate (for example, 96
means 9,600 bps)
Second two numbe rs (Rx mode only): Rx signal level (Level
= 0 - 0.375x, where x is the value on the report; accurate to
3 dB)
Third two numbers (R x mode only): R x cable equalizer; 00
= Equalizer is Off, 01 = Equalizer is On

Used f or testing. Set this bit to 1 to hear the fax data s ignal
(phase C of CCITT T. 30 protocol).
Mak e sure tha t you r eset this bit after testing.

4-10

SERVICE TABLES AND PROCEDURES November 30th, 1991
BIT SWI TCHES

Bit Switch 00

FUNCTION COMMENTS

7 Communication

paramete r dis play

0: Disabled
1: Enabled

Communication parameter display

This is a fault-finding aid. The L CD shows the ke y
parameters (s ee below). This is normally disable d because it
cancels the CSI display for the user.
Mak e sure tha t you r eset this bit after testing.

Modem rate

(bps)

96: 9600
72: 7200

48: 4800
24: 2400

Bit Switch 01

0

LCD contrast

Bit 2 1 0 Contrast

1

0 0 0 Brightest
0 0 1 ↓

2

↓ ↓
1 1 0 ↓
1 1 1 Darkest

Memory read/write by RDS

Bit 4 3 Setting

3

0 0 Always enabled
0 1 User selectable

4

1 0 User selectable
1 1 Always disabled

5 De dicat ed transmission para m eter

programming/printing all SAF f iles

0: Disabled 1: Enabled

6 Not use d Do not change the factory settin g.

Continued on the next page

Sub-scan

Resolution

S: 3.85 l/mm
D: 7.7 l/mm

F: 15.4 l/mm 1E: MH+ EFC

FUNCTION COM M ENTS

Coding Width and

reduction

1D: MH
2D: MR

2E: MR+ EFC
1C: MH+ ECM

2C: MR+ ECM
MC: MMR+ ECM

A: A4 [8.3"]
B: B4 [10.1’]

C: A3 [11.7"]
N: No reduction
R: Reduction

Use these bit switches to adjust the brightness
of th e LCD on th e operat ion pane l.

(0,0): At any time, an RDS system can read or
write RAM data such as TTI and bit switches.
(0,1), (1,0): Normally, RDS systems are locked
out, but the user can temporarily switch RDS
on to allow an RDS operation to take place.
R DS will a utomatically switch off again after a
certain time, which is stored in a RAM address
(see section 4-5). Note that, if an RDS
operation takes place, RDS will not switch off
until this time limit has expired.
(1,1): All RDS systems are always locked out.

T h i s bit must be se t to 1 before attempting to
program de dicat ed transmission para m eters or
printing all files stored in the SAF memory.

DCS:
CCITT G3

NSS:
Non­standard G3

Mode I/ O Rate

(ms/line)

0M: 0
5M: 5

10M: 10
20M: 20
40M: 40

4

4-11

November 30th, 1991 SERVICE TABLES AND PROCEDURES

BIT SWI TCHES

Bit Switch 01

FUNCTION COM M ENTS

7 Auto Service Call for PM

0: Enabled 1: Disabled

Bit Switch 02

FUNCTION COMM ENTS

0 Page separation mark

0: Enabled 1: Disabled

1 R epetition of data when the

received page is longe r than the
printer paper

0: Disabled 1: Enabled

2 Reduction of t he length of

receive d data

0: Enabled 1: Disabled

3 Not used Do not change th e factory settin gs .
4
5

Maximum transmittable document
length

6

Bit 7 6 Setting

0 0 600 mm

7

0 1 1200 mm
1 0 14 m
1 1 100 m

0: The machine will se nd an Auto S ervice Cal l
when the P M inte rv al has e xpired. This interval
is adjusta ble by RAM address. The default
setting is every 30,000 copies (based on the
Print counter).
1: The user will do maintenance as explained in
the Operator’s Manual whenever problems
occur.

0: If a receive d page ha s to be printed out on two
shee ts, an "x" inside a s ma ll box is printed at the
bottom right hand corner of th e first sheet, and a
"2" inside a small box is printed at the top right
hand corner of the second she et. This helps the
user to identify pages that have been split up.

1: No marks are printed.
0: The next page continues f rom where the

previous page left off
1: The fina l few mm of the previous page ar e
printed at the top of the next page.
See section 2-2-1, subsection 5, for details.

This bit determines whether incoming pages are
reduced to fit on the copy pa per if they are
almos t th e same length as the copy paper in the
cassette. See section 2-2-1, subsection 5, for
details.

If the user wants to send very long documents
such as well logs, use the 14 m or 100 m setting.

4-12

SERVICE TABLES AND PROCEDURES November 30th, 1991
BIT SWI TCHES

Bit Switch 03

FUNCTION COMM ENTS

0 Dialing with the handset off-hook

0: Enabled
1: Disabled

1 Lifetime of polling standby files in

the memory

0: Erased after being polled
1: K ept until user erases

2 Inclusion of communications on

the TCR when no image data was
exchanged.

0: No 1: Yes

3 Printing of the error code on the

error report

0: No 1: Yes
4 Not use d Do not change the factory s etting.
5 Printing the TTI in copy mode

0: No 1: Yes
6 Printing the receive d RTI/CSI

0: No 1: Yes

7 R econs tru ction time for th e first

line in receive mode

0: 6 s 1: 10 s

If this bit is 1, the us er will not be able to dial if
the handset is off hook.

0: Me s s ages stored for polling transmission will
be erase d immediately a f te r polling.
1: T h i s setting allows the user to keep me ssages
in the m emory to be polled by more than on e
station.

If communica tion did not reach phase 3 of CC I TT
T.30 protocol (such as for a tele phone call), this
communication can be listed on the TCR if this
bit is at 1.

If this bit is 1 , error codes are printed on the e rror
reports for the use r.

If this bit is 1, the TTI stored in the machine is
printed at the top of the copy.

In addition to the TT I, the other end’s RTI or CSI
will be printed on top of the pages that the
machine receive s.

Whe n the s ending terminal is controlled by a
computer, there m ay be a delay in receiving page
data after the local machine accepts set-up data
and sends CF R. If this occurs, set this bit to 1 to
give the se nding machine more time to send
data.

4

4-13

November 30th, 1991 SERVICE TABLES AND PROCEDURES

BIT SWI TCHES

Bit Switch 04

FUNCTION COMM ENTS

Compression modes available in

receive m ode

0

Bit 1 0 Modes

0 0 MH only

1

0 1 MR or MH

1 0 MR or MH, with

EFC

1 1 MMR, MR, or

MH, with EFC

2 Error counting method

0: 10 (20) [40]

1: In a ccordance with the settings

of bit s 3 to 7

Burst error thres h old

3

Bit 4 3 Threshold

0 0 3 (6) [12]

4

0 1 4 (8) [16]

1 0 5 (10) [20]

1 1 6 (12) [24]

Error line ratio

5

Bit 7 6 5 Value

0 0 0 5%

6

0 0 1 6%

0 1 0 7%

7

0 1 1 8%

1 0 0 9%

1 0 1 10%

The se bits determine what capabilities are
informed to the transmit t ing side in the pr ot ocol
exchange.

The machine counts data errors caused by a
noisy line or defective machine.
0: If the count reaches 10 (Standard mode), 20
(Detail mode), or 40 (Fine mode), the ma chine
sends RTN to the other end in reply to the post­message com m and. A s 10 (or 20 or 4 0) good
lines cause the count to de crement, RTN will
only occur in bad conditions.

If there a re more consecutive error lines in the
receive d page than th e threshold speci fied by
these bits, th e page is rejected. Values in
parenthesis are for Detail re solution, and those in
square brackets are for Fine resolution.

If the number of error lines divided by the total
number of lines reaches the v alue determined by
the settings of these bits, RTN will be sent to the
other end.

4-14

SERVICE TABLES AND PROCEDURES November 30th, 1991
BIT SWI TCHES

Bit Switch 05

FUNCTION COMMENTS

Compression modes available in
transmit mode

0

Bit 1 0 Modes

0 0 MH only

1

0 1 MR or MH
1 0 MR or MH, with
EFC
1 1 MMR, MR, or
MH, with EFC

2 PABX dial tone detection

0: Enabled
1: Disabled

3 PSTN dial tone detecti on

0: Enabled
1: Disabled

4 Busy tone de tection

0: Enabled
1: Disabled

5 Not used Do not change the factory setting.

PSTN access method through

6

PABX

Bit 7 6 Method

7

0 0 No PABX
0 1 Loop Start
1 0 Not used
1 1 Flash Start

The se bits determine what capabilities are
informed to the receiving s ide in th e protocol
exchange.

0: PABX dial tone is detected in accordance
with the para meters programmed in RAM. T h e
machine will wait for the dial tone before trying
to gain access to the PSTN.

0: PSTN dia l tone is dete cted in accordance
with the para meters programmed in RAM. T h e
machine will wait for the dial tone before dialing
out.

0: B u sy tone is detected in accordance with the
parameters programmed in RAM. The ma chine
will not have to wait out the CCITT T1 time
before hanging up if the line is busy.

Set these bits to match the type of signal
accepted by the PABX. If there is no PABX
between the machine a nd the ne twork, set both
bits t o 0.

4

Bit Switch 06

FUNCTION COM M ENTS

0

PSTN access number

1

Access No. Hex value of bit switch
0 F0

2

↓ ↓
9 F9

3

00 00

4

↓ ↓
99 99

5

6

7

Program this bit switch if the machine is
behind a PABX. The access number is
the number the user must dial to get an
outside line. If the machine detects the
access number at the start of a
telephone number, it will connect with
the P ABX, pause for a few seconds,
then dial the number.
Example: If the access number for the
PABX is 9, the bit switch must be F9. To
do this, set all bits to 1 except bits 1 and

2.
If there is no PABX, set all bits to 1.

4-15

November 30th, 1991 SERVICE TABLES AND PROCEDURES

BIT SWI TCHES

Bit Switch 07

FUNCTION C OM MENTS

0 Back to back test

0: Disabled
1: Enabled

1 Short preamble

0: Enabled 1: Disabled
2 Not used Do not change the factory setting.
3 Echo countermeasure

0: Enabled

1: Disabled

4 DIS detection number

0: 1

1: 2

5 ECM

0: On 1: Off
6 Post-me ssage response timing (rx)

0: After feed-out

1: When the leading edge reaches the

copy feed-out sensor

7 Not used Do not change the factory setting.

Set this bit to 1 whe n you w i sh to do a back
to back test. Note that this machine has
jumpers on the NCU for supplying line
voltage during a back to back test.

If this bit is 0, the Short Preamble feature is
switched on.

If the se tting is 1, the ma chine will hang up if
it receives the same signal twice. If the
setting is 0, the machine will ignore echoes
from the line.

The ma chine will s end DCS (G3 set-up
signal) if it receives DIS. If echoes are
frequent, setting this bit to 1 will allow the
machine to wait for the second DIS before
sending DCS.

If this bit is 0, ECM is switched on.

0: Data cannot be stored in the SAF during
reception if the memory is full, so, if this bit is
set to 0, the machine will wait until the page
has bee n f ed out. However, communication
will take longer to complete.
1: T he post message re sponse is se nt e arlier,
but th e paper has not been fed out yet, so i f
there is a jam after th i s, data may be lost.
This bit is ignored during memory reception.

Bit Switch 08 (Transmission)

FUNCTION COMMENTS

0

Initial T x modem rate

Bit 2 Bit 1 Bit 0 Setting

1

0 1 1 9,600 bps
0 1 0 7,200 bps

2

0 0 1 4,800 bps
0 0 0 2,400 bps
Other settings: Not used

3 Not used Do not change the factory settings.
4
5
6
7

The s e bits set the initial starting mode m
rate for transmission. This rate may fall
back to a s l ower rate depending on line
conditions a n d the remote termin al’s
capabilities.

4-16

SERVICE TABLES AND PROCEDURES November 30th, 1991
BIT SWI TCHES

Bit Switch 09 (Transmission)

FUNCTION COMMENTS

0 CNG signal transmission in

manual transmission mode

0: Disabled
1: Enabled

12W rong connection prev ention

method

Bit 2 Bit 1 Setting

0 0 None
0 1 8 digit CSI
1 0 4 digit CSI
1 1 CSI/RTI

3 Closed network (transmission)

0: Disabled
1: Enabled

4 Monitor speaker status during

memory transmission

0: Off 1: On

5 Not used Do not change the factory settin gs .
6
7

CNG (calling tone) is normally used by auto-dial fax
machines to alert a ma nual machine operator that
an auto-transmitting machine is on the line waiting
to transmit. This tone is not needed for manual
operation (full number dialing).

(0,1) - The machine will not transmit if the last 8
digits of the received CSI do not match the l ast 8
digits of the dialed t elephon e number. This does not
work for ma nual dialing.
(1,0) - The sa me as above, except that only the last
4 digits are compared.
(1,1) - The machine will not transmit if the other end
does not identify itself with an RTI or CSI.
(0,0) - Nothing is checked; transmission will always
go ah ead.

1: Transmission will not go ahead if the ID code of
the other termi nal doe s not match the ID code of
this terminal. This feature may not be relia ble when
communicating with another maker’s product.

If this bit is 1, the s pe aker will operate during
memory transmission. Keep this bit at 0 if the user
complains about the noise from the speaker.

4

4-17

November 30th, 1991 SERVICE TABLES AND PROCEDURES

BIT SWI TCHES

Bit Switch 0A (Reception)

FUNCTION COMMENTS

0

Initial Rx modem rate

Bit 2 Bit 1 Bit 0 Setting

1

0 1 1 9,600 bps
0 1 0 7,200 bps

2

0 0 1 4,800 bps
0 0 0 2,400 bps
Other settings: Not used

3 Not use d Do not change the factory settings.
4
5
6 Cable equalizer (rx mode)

0: Off 1: On

7 Not used Do not change the factory setting.

T h e setting of the se bits is used to inform
the sending machine of the initial starting
modem rate for the machine in receive
mode. If 9,600 bps presents a problem
during reception, use a lower setting.

Set this bit to 1 if there is si gnal loss at
higher frequencies because of the length
of wire between the modem and the
telephone ex change.

Also, try using the cable equalizer if one or
more of the following symptoms occurs.

• Communication error with error codes
such as 0-20, 0-23, etc.

• Modem rate fallback occurs frequently.

Bit Switch 0B (Reception)

FUNCTION C OMMENTS

0 Closed network (reception)

0: Disabled

1: Enabled

1 T ra ining error tolerance

0: Type 1

1: Type 2

23Training error tolerance

Bit 3 2 Type 1 Type 2

0 0 15 14

0 1 10 9

1 0 2 4

1 1 0 1

4 Not used Do not change the factory settings.
5
6
7

1: R eception will not go ahead if the ID code

of the other terminal doe s not match the ID
code of this te rmina l. This feature ma y not be
reliable whe n communicating with a nother
maker’s product.

This bit determines the values availa ble with
bits 2 and 3.

Type 1 can be use d a nywhere. Type 2 is
normally used only in Europe.

If the machine detects more errors during
training than the number set by these bits,
training fails and the machine will s end FTT.
The data will be resent at a lower rate .

Bit switch 0C is not used. Do not change any of the factory settings.

4-18

SERVICE TABLES AND PROCEDURES November 30th, 1991
BIT SWI TCHES

Bit Switch 0D

FUNCTION C OM MENTS

0 Not used Do not change the factory settings.
1
2
3
4
5
6 Contents of the top line of the LCD

when handset mode is in use

0: Tele phone num ber dial ed

1: HANDSET MODE

7 Not used Do not change the factory setting.

Bit Switch 0E

FUNCTION C OM MENTS

0 Not used Do not change the factory settings.
1
2
3
4
5 Conditions for reception

0: Normal

1: RTI or CSI needed

6 Not used Do not chan ge the factory settings.
7

0: The telephone number being dialed is

displayed.

1: Only HANDSET MODE is displa yed.

1: If the sending machine does not transmit

an RTI or CSI, the call will be rejected, and
the machine will send DCN.

4

Bit sw itches 0F to 1F are not used. Do not c hange any of the factory settings.

Factory Settings

The factory settings of all the bit switches are shown below in hexadecimal
code. The first digit represents bits 7 to 4, and the second digit represents
bits 3 to 0.

Switch Setting Switch Setting Switch Setting Switch Setting

00 00 08 03 10 00 18 00
01 01 09 01 11 00 19 00
02 42 0A 03 12 00 1A 00
03 08 0B 00 13 00 1B 00
04 03 0C 00 14 00 1C 00
05 23 0D 00 15 00 1D 00
06 FF 0E 00 16 00 1E 01
07 06 0F 11 17 00 1F 85

4-19

November 30th, 1991 SERVICE TABLES AND PROCEDURES

NC U PARAM ET E RS

4.3. NCU PARAMETERS

The following tables give the RAM addresses and units of calculation of the
parameters that the mac hine uses for ringing signal detection and automa tic
dialing. The factory settings are also given. Most of these must be changed
by RAM read/write (Function 95), but some can be changed using NCU Pa­rameter prog r amming (Function 96); if Function 96 can be used, this will be
indicated in the Remarks column. The RAM is programmed in hex code un­less (BCD) is included in the Unit column.

When using RAM read/write, you must add the bank number before the four­digit RAM address number. See section 4-1-6 for details.

Addr ess Function Unit Remarks

413B Country code (NCU parameters

only)
413C Line current detection time 20 ms Line current is not detected
413D Line current wait time
413E Line current drop detect time
413F PSTN dial tone upper frequency

limit (HIGH)
4140 PSTN dial tone upper frequency

limit (LOW )
4141 PSTN dial tone lower frequency

limit (HIGH)
4142 PSTN dial tone lower frequency

limit (LOW )
4143 PST N dial tone detection time 20 ms If 4143 contains FF, the
4144 PST N dial tone reset time 160 ms
4145 PSTN dial tone continuous tone

time
4146 PSTN dial tone permissible drop

time
4147 PST N wait interval 160 ms
4148 Ringback tone detection time 20 ms Detection is disabled if this

4149 PSTN busy tone upper frequency

limit (HIGH)
414A PST N busy tone upper frequency

limit (LOW )
414B PST N busy tone lower frequency

limit (HIGH)
414C PSTN busy tone lower frequency

limit (LOW )

Hex F unction 96 (parameter 00).

if 413C contains FF.

Hz (BCD) See Note 2.

machine pauses f or the

20 ms

Hz (BCD) If 4149 is FF, detection is

pause time (4147).

contains FF.

disabled. See Note 2.

4-20

SERVICE TABLES AND PROCEDURES November 30th, 1991
NC U PARAM ET E RS

Address Functi on Unit Remarks

414D PABX dial tone upper frequency

limit (HIGH)
414E PABX dial tone upper frequency

limit (LOW )
414F PABX dial tone lower frequency

limit (HIGH)
4150 PABX dial tone lower frequency

limit (LOW )
4151 PABX dial tone detection time 20 ms If 4151 contains FF, the
4152 PABX dial tone reset time 160 ms
4153 PABX dial tone continuous tone

time
4154 PABX dial tone permissible drop

time
4155 PABX wait interval 160 ms
4156 PABX ring back tone dete ction time 20 ms Detection is disabled if this

4157 PABX busy tone upper frequency

limit (HIGH)
4158 PABX busy tone upper frequency

limit (LOW )
4159 PABX busy tone lower frequency

limit (HIGH)
415A PABX busy tone lower frequency

limit (LOW )
415B Busy tone ON time: range 1 20 ms
415C Busy tone OFF time: range 1
415D Busy tone ON time: range 2
415E Busy tone OFF time: range 2
415F Busy tone ON time: range 3
4160 Busy tone OFF time: range 3
4161 Busy tone ON time: range 4
4162 Busy tone OFF time: range 4
4163 Busy tone continuous tone

detection ti me
4164 Busy tone signal state time tolerance for all ranges, and number of cycles

required for detection (a setting of 4 cycles means that ON-OFF-ON or OFF-

ON-OFF must be detected twice).

Hz (BCD) See Note 2.

machine pauses f or the

20 ms

Hz (BCD) If this is F F, detection is

pause time (4155).

contains FF.

disabled. See Note 2.
See Note 2.

4

Tolera nce (± )

Bit 1 0
0 0 75%
0 1 50%
1 0 25%
1 1 12.5%

Bits 7, 6, 5, 4 - number of cycles required for detection

4-21

November 30th, 1991 SERVICE TABLES AND PROCEDURES

NC U PARAM ET E RS

Address Functi on Unit Remarks

4165 International dial tone upper

frequency limit (HIGH)

4166 International dial tone upper

frequency limit (LOW)

4167 International dial tone lower

frequency limit (HIGH)

4168 International dial tone lower

frequency limit (LOW)

4169 International dial tone detection

time

416A International dial tone reset time 160 ms
416B International dial tone continuous

tone time

416C International dial tone permissible

drop tim e

416D International dial wait interval 160 ms
416E Country dial tone upper frequency

limit (HIGH)

416F Country dial tone upper frequency

limit (LOW )

4170 Country dial tone lower frequency

limit (HIGH)

4171 Country dial tone lower frequency

limit (LOW )

4172 Country dial tone detection time 20 ms If 4172 contains FF, the
4173 Country dial tone reset time 160 ms

4174 Country dial tone continuous tone

time

4175 Country dial tone permissible drop

time

4176 Country dial wait interval 160 ms
4177 Grounding time (ground start

mode)

4178 Break time (flash start mode) 1 ms The Di relay is open for this

4179 International dial access code BCD For a code of 100:
417A

417B PABX pause time 20 ms
417C Progress tone detection level, and

cadence detection enable flags

Hz (BCD) See Note 2.

20 ms If 4169 contains FF, the

machine pauses f or the
pause time (416D).

20 ms

Hz (BCD) See Note 2.

machine pauses f or the
pause time (4176).

20 ms

20 ms Not used in the USA

interval.

4179 - F1
417A - 00

Bit 7 Bit 6 dBm
1 1 -53
1 0 -32.5
0 1 -40.5
0 0 -29

Bits 3, 2, 1, 0 - Europe only.

417D CCITT T1 time 2.56 s

4-22

SERVICE TABLES AND PROCEDURES November 30th, 1991
NC U PARAM ET E RS

Address Functi on Unit Remarks

417E Max. number of dials per station

(not using memory)

417F Redial interval (not using memory) 1 min
4180 Interval between dia ling to

different stations

4181 Tx level from modem - dBm Function 96 (parameter 01).
4182 Acceptable ringing signal

frequency: range 1, upper limit

4183 Acceptable ringing signal

frequency: range 1, lower limit

4184 Acceptable ringing signal

frequency: range 2, upper limit

4185 Acceptable ringing signal

frequency: range 2, lower limit

4186 Number or rings until a call is

detected

4187 Minimum required length of the

first ring

4188 Minimum required length of the

second and subsequent rings

4189 Ringing signal detection reset time 40 ms Function 96 (parameter 09).
418A Time between opening or closing

the Ds re lay and opening the Di
relay (Europe/A sia only)

418B Break time for pulse dialing See Note 3. Function 96

418C Make time for pulse dialing S ee Note 3. Function 96

418D Time between final Di relay closure

and Ds relay opening or closing
(Europe/Asia only)

418E Pause between dialed digits (pulse

dia l mode)

418F Time waited when a pause is

en t ered at t he operation pan el

4190 DTMF tone on time 1 ms Function 96 (parameter 16).
4191 DTMF tone off time Function 96 (parameter 17).
4192 DTMF tone attenuation value - dBm Function 96 (parameter 18).

41B3 Max. time limit to dial a number 2.56 s All countries: 15[H] (53.76 s)
41B4 Max. no of consecutive pauses in

a telephone n umber

1

2.56 s

1000/
.672N
(Hz). N is
the value
stored
using
Function

96.
1 Function 96 (parameter 06).

20 ms See Note 4. Function 98

1 ms See Note 3. Function 96

20 ms See Note 3. Function 96

Hex Germany: 1, Others: 250

Function 96 (parameter 02).

Function 96 (parameter 03).

Function 96 (parameter 04).

Function 96 (parameter 05).

(parameter 07).
Function 96 (parameter 08).

(parameter 10).

(parameter 11).

(parameter 12).
See Note 3. Function 96

(parameter 13).

(parameter 14).
Function 96 (parameter 15).

See Note 5.

4

4-23

November 30th, 1991 SERVICE TABLES AND PROCEDURES

NC U PARAM ET E RS

Notes

1. If a setting is not required, store FF in the address.

2. Tone frequencies are stored in BCD in the follo wing format.
Examples:
a) 380 Hz HIGH 0 3 LOW 8 0
b) 1210 Hz HIGH 1 2 LOW 1 0

3. Pulse dial parameters (addresses 418A to 418F) are the values for 10
pps. If 20 pps is used, the machine automatically c ompensates .

4. The first ring may not be detected until 1 to 2.5 wavelengths after the time
specified by th is parameter.

5. N must be between 0 and 15.
The att enuation levels are as follow s.

High frequency tone: - N dBm
Low frequency tone: - N - 3 dBm

4-24

SERVICE TABLES AND PROCEDURES November 30th, 1991
NC U PARAM ET E RS

On the following pages, there is a list of factory sett ings for those p a rameters
that are programmed for the USA version of this machin e.

For each RAM address, there are two columns.

• The left hand column shows the actual value of the pa rameter.

• The right hand column shows the value of the factory setting that is

stored in the RAM. The factory settings are quoted either in hexadeci­mal code (the actual contents of the RAM address) if there is a H after
the value in the table, or in de cimal (converted from the actual hexadeci­mal contents of the RAM address) if there is no H after the value.

• Some RAMs must be programmed in BCD; see the NCU Parameter

definition table for details.

Address 4147 4155 416D 4176
Value 2.08 s 13 4 s 25 0 0 0 0

Add ress 4177 4178 417C 417D 417E
Value 0 0 0 0 -5 3

C0(H) 53.8 s

21 3 3

Address 417F 4180 4181 4182(Hz) 4183 (Hz)
Value 5 5

12.8 s

-6 dB

5

23.3

6

64

11.7

127

Address 4184 (Hz) 4185 (Hz) 4186 4187 4188
Value

74.4

20

22.2

67 1 1 0.2 s 10 0.2 s 10

Address 4189 418A 418B 418C 418D
Value 8 s 200

80 ms

80

62 ms

62

41 ms

41

80 ms

80

Address 418E 418F 4190 4191 4192
Value

0.8 s

40

2.02 s

101

0.1 s

100

0.1 s

100 8 8

4

4-25

November 30th, 1991 SERVICE TABLES AND PROCEDURES

DEDICATED TRANSMISSION PARAMETERS

4.4. DEDICATED TRANS MISSION PARAMETERS

Each Quick Dial Key and Speed Dial Code has three bytes of programmable
parameters allocated to it. If transmissions to a particular machine often expe­rience problems, store that terminal’s fax number as a Quick Dial or Speed
Dial, and adjust the parameters allocated to that number.

The programming procedure will be explained first. Then, the three bytes will
be described.

4.4.1. Programming Procedure

1. Set bit 5 of bit switch 01 to 1.

2. Either use Function 32 (for a Quick Dial number) or Function 33 (for a
Speed Dial number)

Example: Change the Parameters in Quick Dial 10.

3. Function 3 2 Yes

4. Press Quick Dial key 10

QUICK QUICK/∇
PRINT LIST ∇

QUICK 10 Y/N
SET PARAMETER?

Note: When selecting Speed Dial 10

with Function 33: 1 0 at the ten key pad

5. Ye s TX PARAMETER 1 Y

1111 1111

6. The settings for byte 1 are now displayed. Press a numb er from 0 to 7
correspon ding to the bit that you wish to change.

Example: Change bit 7 to 0: 7 TX PARAMETER 1 Y

0111 1111

7. Either:

• Select another byte: Yes until the correct byte is displayed. Then go

to step 6. If you press Yes while byte 3 is displayed, you can go back
to step 4 and select another number.

• Finish: Function

8. After finishing, set bit 5 of bit switch 01 to 0.

4-26

SERVICE TABLES AND PROCEDURES November 30th, 1991
DEDICATED TRANSMISSION PARAMETERS

4.4.2. Parameters

Byte 1

FUNCTION COMMENTS

01Initial T x modem rate

Bit 1 Bit 0 Setting

0 0 9,600 bps
0 1 7,200 bps
1 0 4,800 bps
1 1 2,400 bps

2

Tx level

Bit 2 3 4 5 Level

3

(dBm)

0 0 0 0 0

4

0 0 0 1 -1
0 0 1 0 -2

5

0 0 1 1 -3
and so on until
1 1 1 1 -15

6 Not use d Do not change the factory setting.
7 Dedicated trans m ission paramete r s

for this Quick/Speed Dial number
0: Disabled 1: Enabled

If training with a particular remote terminal
always take s too long, the initial modem rate
may be too high. Reduce the initial Tx modem
rate usin g these bits.

If communica tion with a particular remote
termin al often contains errors, the signal leve l
may be inappropriate. Adjust the T x level for
communications with that terminal until the
results are better.

0: The parameters in these thre e bytes will be
ignored. The current se ttings of the rel evant bit
switches, NCU parame t ers, and RAM addr esses
will be used.
1: Th e parameters in the s e three bytes will be
use d wh en transmitti n g to the fax number
stored in the Quick Dial Key or Speed Dial Code
that these bytes are allocated to.

4

Byte 2

FUNCTION COMMENTS

0 DIS/NS F detection method

0: Firs t D I S or NS F
1: Second DIS or NSF

1 ECM during transmiss i on

0: Enabled
1: Disabled

2 Not use d Do not chan ge the f actory s ettings.
3
4

Continued on the next page

Set this bit to 1 if echoes on the line are
interfering with the set-up protocol at the start of
transmission. The machine will then wait for the
second DIS or NSF before s ending DCS or NSS.

For example, if ECM is switched on but is not
wanted when se nding to a particular terminal,
set th i s bit to 1.

4-27

November 30th, 1991 SERVICE TABLES AND PROCEDURES

DEDICATED TRANSMISSION PARAMETERS

Byte 2

FUNCTION COMMENTS

Compression modes available in
transmit mode

5

Bit 6 5 Modes

0 0 MMR, MR, or MH

6

0 1 MR or MH
1 0 MH only
1 1 MH only

7 Short preamble

0: Disabled
1: Enabled

Byte 3

FUNCTION AND COMMENTS

CCITT T 1 timer
If you wi sh to use a diffe rent T1 ti mer than the N CU parameter s etting when sending to
a particular terminal, adjust this byte. The T 1 timer is the BCD value of this byte, multi­plied by 2.56 se con ds.

The s e bits determine the capabilities that are
informed to the other te rmina l during
transmission.

If this bit is 1, Short Preamble is always used
when transmitting to this terminal.

Caution: Note that if the v alue of this byte is 0, the T1 timer will be 35 s.

Caution: If the value of byte 3 is 0, the CCITT T1 timer is 35 s, which

may no t b e app ro p riate fo r yo ur area. Ther efor e, every time yo u
program a set of dedicated transmission parameters, be sure to
check the contents of b yte 3 and adjust if necessary.

4-28

SERVICE TABLES AND PROCEDURES November 30th, 1991
USEFUL RAM ADDRESSES

4.5. USEFUL RA M ADDRESSES

4044

Bit 2: Forwarding 0: Enabled, 1: Disabled
Bit 3: Authorized reception 0: Enabled, 1: Disabled
Bit 6: Continuous polling 0: Disa bled, 1 : Enabled

4045

Bit 0: Display of both RTI and CSI on the LCD 0: Disabled, 1: Enabled
Bit 2: P rintout of forwarded messages 0: Disabled, 1: Enable d

4047: Number of page retrans m ission attempts (Hex code)
4048

Bit 5: Stop key during memory transmission 0: Disabled, 1: E n abled
Bit 6: First page to be retransmitted (memory tx)

0: The page that was not sent correctly, 1 : Page 1

4049

Bi t 0: Keystroke Program executi on me t hod

0: Press the programmed Quick Dial Key

1: Press the programmed Quick Dial Key then the Start key
Bit 2: R DS 0: Enabled, 1: Disabled
Bit 3: On-hook dial 0: Enabled, 1: Disabled

404B: Contrast threshold - Lighten (Hex code, from 00 to 1F) 00: All Black, 1F: All White
404C: Contrast threshold - Normal (Hex code, from 00 to 1F) 00: All Black, 1F: All White
404D: Contrast threshold - Darken (Hex code, from 00 to 1F) 00: All Black, 1F: All White

404F - 4051: Page separation and data reduction parameters: see section 2-2-1, "Paper Feed"
4053

Bit 0: Default resolution used for copy mode 0: As se lected by the user, 1: Fine

4054

Bit 0: Reduction during printing 0: Disabled, 1: Enabled

4055

The amount of remaining memory below which ringing detection (and the refore substitute re­ception) is disabled if the printer is out of action (he x code, from 00 to FF, unit = kbytes)

• One page i s about 24 k bytes

• If this is kept at 0, the ma chine will dete ct ringing signals and go into receive mode even if

there is no memory space left. This will result in communication failure.

4057

Image/Text detection threshold in halftone mode (Hex: 00 - 1F)

• 01: A lmost all the data will be processed without halftone, even if the f ax message contains

photographs.

• The thres hold increases with increme nts in the setting from 01 to 1F.

• 00, 1F: Almost all the data will be halftone processed, even if the f ax message contains only

text.

4

4058: Number of redialing attempts, including the first dialing attempt (memory tx)

Hex : 00 - FF

4059: Redialing interv al (memory tx) Hex: 00 - FF (minutes)
405D: Time for which RDS is enabled after the user has switched it on BCD: 00 - 99 (hours)

4-29

November 30th, 1991 SERVICE TABLES AND PROCEDURES

USEFUL RAM ADDRESSES

410E - 4110: PM interval

Bits 7 - 4 Bits 3 - 0

410E Tens Units

410F Thousands Hundreds
4110

Hundred

thousands

Ten tho u sand s

Factory Settings

The factory settings of the abo ve RAM addresses are shown below in hexa­decimal code. The first digit represents bits 7 to 4, and the second digit repre­sents bits 3 to 0.

RAM Setting RAM Setting RAM Setting

4044 31 404C 0D 4054 00
4045 00 404D 0B 4055 00
4047 03 404F FF 4057 0C
4048 08 4050 00 4058 05
4049 12 4051 04 4059 05

404B 0F 4053 00 405D 24

Note: When progr amming a RAM address, you have to enter the bank

number before the four-digit RAM ad dress. In this machine, the bank
number is alw ays 2. For example, to program RAM address 4044 us­ing Function 95, you have to input 24044.

4-30

SERVICE TABLES AND PROCEDURES November 30th, 1991
SPECI AL TOOLS AND LUBRICANTS

4.6. SPECIAL TOOLS AND LUBRICANTS

• Scan line test chart: P/ N H0819502

• 8 line/mm test pattern: P/N H0419001

• Test lead: P/N H0419002

• SBU adjustment knobs: P/N H0129300

• Allen wrench

• Lens block posit ioning tool: P/N H0819503

For how to use, see the following diagram

4

4-31

November 30th, 1991 SERVICE TABLES AND PROCEDURES

PM TABLE

4.7. PM TABLE

Scanner

Item 10K 30K 60K 1 year Notes

Exposu re Glass C C C C Soft cl ot h and alcohol
R1 and R2 Rollers C C C C Soft cloth a nd alcohol
Pick-up Torque Limiter L L Use Mobil Temp 78.
White Plate C C C C Soft cloth and water
Feed Roller C R R C Soft cloth and water
Pick -up R oller C R R C Soft cl ot h and wate r
Separa t ion Roller C R R C S oft cloth and wa t er
Shutter Torque Limiter L L Use Mobil Temp 78.

Printer an d Up per Casse tte

Item 10K 30K 60K 1 year Notes

Paper Feed Roller C C R C Soft cloth and alcohol
Relay Roller C C C C Soft cloth and alcohol
Registrat ion Rollers C C C C Soft cloth and alcohol
The rmistor C C Soft cloth and alcohol
Hot Roller S trippers C C Cotton swab and alcohol
Feed-out Roller C C C C Soft cloth and alcohol
Hot Roller R Soft cl ot h and alcohol
Pres sure Roller (Fusing) R
Thermostat C C Soft cloth and alcohol
Clea ning Pad R R R
Transfer Corona Unit C C R C Soft cloth/cotton swab
Charge Corona Unit C C R
Corona Wires C C C
Quenching Lamp C C C C
Laser Optics Shield Glass C C C C
Development Unit R
Ozone Filter R R R

C: Clean, L: Lubricate, R: Replace

and alcohol

Lower Ca ssette

Item 10K 30K 60K 1 year Notes

Pick -up and Feed Roller s C R R C Sof t cloth and alcoh ol
Separa t ion Roller C R R C S oft cloth and al cohol
Relay Roller s C C C C Sof t cloth and alcohol
Separation Torque Limiter L R Use Mobil Temp 78.
Pick -up Torqu e Limiter L R

Other

Item 10K 30K 60K 1 year Notes

Exte rior and Covers C C C C Soft cloth and water

4-32

[A]

[A]: 2 screws
[B]: 6 screws
[C]: 6 screws
[D]: 4 screws
[E]: 2 screws

REPLACEMENT AND ADJUSTMENT November 30th, 1991
COVERS

5. REPLACEMENT AND ADJUSTMENT

5.1. COVERS

[D]

[B]

• Fro nt Cover [A], Left Cover [B], Right Cover [C], Rear Cover [D], Docu-

[C]

[E]

ment Table [E]

Note: If you remove the document table, adjust the document table posi-

tion on replacement (see section 5-2-3).

5

5-1

November 30th, 1991 REPLAC EMENT AND ADJUSTMENT

ADF/SCANNER

5.2. ADF/SCANNER

5.2.1. Document Feed [C], Pick-up [D], and Separation [E] Rollers

[B]

[A]: 2 screws
[C]: 1 E-ring
[D]: 1 E-ring
[E]: 1 clip

[C]

[A]

[D]

[F]

[E]

• First, remove the document tray and open the ADF cover (see section 5-

1).

Caution: Do not touch the rubber surface of the new rollers, o r

document feed errors will develop sooner than normal.

5-2

REPLACEMENT AND ADJUSTMENT November 30th, 1991
ADF/SCANNER

5.2.2. Separation Roller Adjustment

The separation pressure can be adjusted to correct d ouble feed or non-feed
problems, or to customize the machine to meet user requirements if non­standard paper types are often scanned.

Adjust the pressure with knob [F] (see the previous page); the standard set­ting is at the center. Numbers 1 to 5 are printed by the scale. Rotate the knob
until the arrow points to the number that you want to select. Use trial and er­ror until document feed is satisfactory. Some guidelines are given below.

1. Adjustment to match the doc um ent type

Document Type Setting

Thin s heets of paper 1 or 2
Thick sheet s of pape r 4 or 5

2. Adjustment in response to a problem

Problem Setting

Multi-feed - Thin s heets 1 or 2
Multi-feed - Thick sheets 4 or 5
Non-feed 4 or 5
Document jam 1 or 2

The factory setting is 3.

5.2.3. Document Table Adjustment

[A]

5

Reassembly:

• Make a test copy. Adjust the position of the document table [A] so that

the center of the document coincides with the center of the copy.

5-3

November 30th, 1991 REPLAC EMENT AND ADJUSTMENT

ADF/SCANNER

5.2.4. Xenon Lamp [B]

[A]: 1 screw
[B]: 2 connectors

[A]

• First, remove the right cover (see section 5-1).

[B]

Reassembly

• Test the new lamp before reassembly.

5.2.5. Xenon Lamp Driver [A]

(2)

(3)

[A]: 2 screws, 3 connectors

[A]

(3)

(1)

(1)

(2)

• First, remove the rear and right covers (see section 5-1).

5-4

REPLACEMENT AND ADJUSTMENT November 30th, 1991
ADF/SCANNER

5.2.6. Tx Motor [E]

[C]

[B]

[E]

[A]

[A]: 5 screws
[B]: 2 screws
[C]: 3 screws
[D]: 2 screws
[E]: 2 screws

[D]

To access this motor, remove the left cover.

Reassembly

• Before replacing the left cover, adjust the timing belts as shown below.

5.2.7. Timing Belt Tension Adjustments

[A]

[A]: Loosen 2 screws

Adjust the position of brack et [A] until the tension is satisfactory.

5

5-5