Ricoh FAX500 Service Manual FX550 [E]

FAX550

SERVICE MANUAL

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

Type A: FAX500

Type B: FAX550

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 manufacturer’s instructions.

CONTENTS

1. OVERALL MACHINE INFORMATION

1.1. SPECIFICATIONS . . . . .	. . . . . . . . . . . . .	1-1
1.2. FEATURES . . . . . . . .	. . . . . . . . . . . . .	1-2
1.3. COMPONENT LAYOUT . . .	. . . . . . . . . . . . .	1-5
1.3.1. Mechanical Components .	. . . . . . . . . . . . . 1-5
1.3.2. Drive Components . . . . . . . . . . . . . . . . . 1-6
1.3.3. Electrical Components . .	. . . . . . . . . . . . .	1-7
1.4. OVERALL SYSTEM CONTROL	. . . . . . . . . . . . .	1-9
1.5. VIDEO DATA PATH . . . . .	. . . . . . . . . . . . .	1-10
1.5.1. Transmission . . . . . .	. . . . . . . . . . . . .	1-10
1.5.2. Reception . . . . . . .	. . . . . . . . . . . . . 1-10
1.6. POWER DISTRIBUTION . . . . . . . . . . . . . . . . 1-11
1.6.1. Distribution Diagram . . .	. . . . . . . . . . . . .	1-11
1.6.2. Memory Back-up Circuit . .	. . . . . . . . . . . . .	1-12

2. DETAILED SECTION DESCRIPTIONS

2.1. SCANNER . . . . . . . . . . . . . . . . . . . . . . 2-1

2.1.1. Mechanisms . . . .		. . . . . . . . . . . . . . .	2-1
1.	Document Detection . .	. . . . . . . . . . . . . . .	2-1
2.	Pick-up and Feed . . .	. . . . . . . . . . . . . . .	2-2
2.1.2. Video Data Processing		. . . . . . . . . . . . . . .	2-3
2.2. PRINTER . . . . . . .		. . . . . . . . . . . . . . .	2-4
2.2.1. Mechanisms . . . .		. . . . . . . . . . . . . . .	2-4
1.	Paper Feed . . . . .	. . . . . . . . . . . . . . .	2-4
2.	Cutting . . . . . . .	. . . . . . . . . . . . . . .	2-5
3.	Cutter Jam Detection .	. . . . . . . . . . . . . . .	2-5
2.2.2. Circuits . . . . . .		. . . . . . . . . . . . . . .	2-6
1.	Video Data Processing .	. . . . . . . . . . . . . . .	2-6
2.	Thermal Head . . . .	. . . . . . . . . . . . . . .	2-6

2.3. PCBs AND THEIR FUNCTIONS . . . . . . . . . . . . .		2-7
2.3.1. FCU . . . . . . . . . . . . . . . . . . . . . .		2-7
2.3.2. MBU . . . . . . . . . . . . . . . . . . . . . .		2-9
2.3.3. SBU . . . . . . . . . . . . . . . . . . . . . .		2-10
2.3.4. OPU . . . . . . . . . . . . . . . . . . . . . .		2-10
2.3.5. NCU . . . . . . . . . . . . . . . . . . . . . .		2-11
1.	PCB Block Diagram . . . . . . . . . . . . . . . . .	2-11
2.	Signal and Jumper Settings . . . . . . . . . . . . . .	2-12
2.3.6. PSU . . . . . . . . . . . . . . . . . . . . . .		2-13

3. INSTALLATION

3.1. CONNECTING UP THE MACHINE . . . . . . . . . . . .	3-1
3.2. INITIAL PROGRAMMING . . . . . . . . . . . . . . .	3-2
3.3. LANGUAGE ROM SELECTION . . . . . . . . . . . . .	3-2

4. SERVICE TABLES AND PROCEDURES

4.1. SERVICE LEVEL FUNCTIONS . . . .	. . . . . . . . .	4-1
4.1.1. Bit Switch Programming (Function 91)	. . . . . . . . .	4-1
4.1.2. System Parameter List (Function 92) .	. . . . . . . . .	4-1
4.1.3. Error Code Display (Function 93) . .	. . . . . . . . .	4-2

4.1.4.Service Monitor (Function 93) . . . . . . . . . . . . . 4-2

4.1.5.Protocol Dump (Function 94) . . . . . . . . . . . . . 4-2

4.1.6. RAM Display/Rewrite (Function 95) . . . . . . . . . . 4-3

4.1.7.RAM Dump (Function 95) . . . . . . . . . . . . . . 4-3

4.1.8.NCU Parameters (Function 96) . . . . . . . . . . . . 4-4

4.1.9.ADF Test (Function 97) . . . . . . . . . . . . . . . 4-4

4.1.10. Xenon Lamp Test (Function 97) .	. . . . . . . . . .	4-5
4.1.11. DTMF Tone Test (Function 97) . .	. . . . . . . . . .	4-5
4.1.12. Printer Test Patterns (Function 97)	. . . . . . . . . .	4-6
4.1.13. Operation Panel Test (Function 97)	. . . . . . . . . .	4-6

4.1.14.Modem Test (Function 97) . . . . . . . . . . . . . 4-7

4.1.15.Ringer Test (Function 97) . . . . . . . . . . . . . . 4-8

4.1.16.Buzzer Test (Function 97) . . . . . . . . . . . . . . 4-8

4.1.17.Sensor Initialization (Function 97) . . . . . . . . . . . 4-8

4.1.18.Serial Number (Function 98) . . . . . . . . . . . . . 4-9

4.1.19.Pulse Width (Function 99) . . . . . . . . . . . . . . 4-9

4.1.20.	Bypassing Restricted Access	. . . . . . . . . . . .	4-10
4.1.21.	Printing all Memory Files .	. . . . . . . . . . . . .	4-10

4.1.22. CSI Programming . . . . . . . . . .	. . . . . . .	4-11
4.1.23. Telephone Line Type Selection . . . . .	. . . . . . .	4-11
4.2. BIT SWITCHES . . . . . . . . . . . . .	. . . . . . .	4-12
4.3. NCU PARAMETERS . . . . . . . . . . .	. . . . . . .	4-24
4.4. DEDICATED TRANSMISSION PARAMETERS	. . . . . . .	4-39
4.4.1. Programming Procedure . . . . . . .	. . . . . . .	4-39
4.4.2. Parameters . . . . . . . . . . . . .	. . . . . . .	4-40
4.5. USEFUL RAM ADDRESSES . . . . . . .	. . . . . . .	4-42
4.6. SPECIAL TOOLS AND LUBRICANTS . . . .	. . . . . . .	4-44

5. REPLACEMENT AND ADJUSTMENT

5.1. COVERS . . . . . . .	. . . . . . . . . . . . . . .	5-1
5.1.1. Top Cover . . . . .	. . . . . . . . . . . . . . .	5-1
5.1.2. Front and Rear Covers	. . . . . . . . . . . . . . .	5-1

5.2.SCANNER . . . . . . . . . . . . . . . . . . . . . . 5-2

5.2.1.ADF Clutch and Pick-up and Feed Rollers . . . . . . . . 5-2

5.2.2. Separation Roller . . . . .	. . . . . . . . . . . .	5-3
5.2.3. Tx Motor . . . . . . . . .	. . . . . . . . . . . .	5-4
5.2.4. Timing Belt Tension Adjustments	. . . . . . . . . . .	5-4
5.2.5. Xenon Lamp . . . . . . .	. . . . . . . . . . . .	5-5
5.2.6. Xenon Lamp Driver . . . . .	. . . . . . . . . . . .	5-5
5.2.7. SBU . . . . . . . . . .	. . . . . . . . . . . .	5-6
5.2.8. SBU Adjustments . . . . .	. . . . . . . . . . . .	5-6
5.3. PRINTER . . . . . . . . . .	. . . . . . . . . . . .	5-10
5.3.1. Rx Motor . . . . . . . .	. . . . . . . . . . . .	5-10
5.3.2. Thermal Head . . . . . .	. . . . . . . . . . . .	5-10
5.3.3. Cutter . . . . . . . . . .	. . . . . . . . . . . .	5-11

5.4.PCBs . . . . . . . . . . . . . . . . . . . . . . . . 5-12

5.4.1.FCU and Battery . . . . . . . . . . . . . . . . . . 5-12

5.4.2.Memory . . . . . . . . . . . . . . . . . . . . . 5-12

5.4.3. MBU . . . . . . . . . . . . . . . . . . . . . . 5-13

5.4.4.PSU and NCU . . . . . . . . . . . . . . . . . . . 5-14

5.4.5.Operation Panel . . . . . . . . . . . . . . . . . . 5-14

6. TROUBLESHOOTING

6.1. COPY QUALITY TROUBLESHOOTING . . . . . . . . . . 6-1

6.1.1.	Received Copies . . . . . . . . . . . . . . . . . .	6-1
6.1.2.	Copies made in Copy Mode . . . . . . . . . . . . .	6-1

6.2.MECHANICAL PROBLEMS . . . . . . . . . . . . . . . 6-2

6.2.1.ADF/Scanner . . . . . . . . . . . . . . . . . . . 6-2

6.2.2. Printer . . . . . . . . . . . . . . . . . . . . . . 6-5

6.3. ERROR CODES . . . . . . . . . . . . . . . . . . . 6-7

6.4. DEFECTIVE SENSOR TABLE . . . . . . . . . . . . . . 6-13

OVERALL MACHINE INFORMATION	November 30th, 1991
SPECIFICATIONS

1. OVERALL MACHINE INFORMATION
			1
1.1. SPECIFICATIONS
Type	Protocol
Desktop transceiver	Group 3 with ECM
Circuit	Data Rate
PSTN, PABX	9600/7200/4800/2400 bps; automatic fallback

Connection

Direct couple

Document Size
Length:	105 - 1200 mm
	[4.13 - 47.2 ins]

Up to 100 m [328 ft] after adjustment

Width:	148 - 216 mm
	[5.8 - 8.5 ins]
Thickness:	0.05 to 0.15 mm
	[2 to 6 mils]

Document Feed

Automatic feed, face down

ADF Capacity

30 sheets (using 80 g/m2 paper)

Scanning Method

Flat bed, with CCD

Maximum Scan Width

216 mm [8.5 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: 256 kbytes (14 pages), with optional extra 1 Mbyte or

2 Mbytes (max 71 or 128 pages respectively)

Compression

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

Modulation

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

I/O Rate

With ECM: 0 ms/line

Without ECM: 5, 10, 20, or 40 ms/line

Transmission Time

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

Printing System

Thermal printing, automatic cutter

Paper Size

216 mm (A4) x 100 m [8.5 ins x 328 ft]

Maximum Printout Width

210 mm [8.3 ins]

Maximum Printer Resolution Main scan: 8 dots per mm [203 dpi] Sub scan: 15.4 lines/mm [392 lpi]

Power Supply

220 - 240 Vac, 50 Hz

Power Consumption (Base Machine Only)

Standby: 13 ± 5 W

Transmit: 29 ± 5 W

Receive: 22 ± 5 W

Copying: 41 ± 7 W

Operating Environment

Temperature: 17 - 28 °C [63 - 82 °F]

Humidity: 30 - 85 %Rh

Dimensions (W x D x H)

325 x 388 x 174 mm [12.8 x 15.3 x 6.9 ins] Excluding handset, trays, and optional units

Weight

10 kg [22 lbs]

1-1

November 30th, 1991

1.2. FEATURES

KEY:

O = Used, X = Not Used,

A = With optional memory only, G = Not used in Germany,

S = Service mode in some countries

Equipment

ADF		O
Bar code reader		X
Built-in handset		X
Cabinet		X
Connection for ans. machine		X
Connection for handset		O
Cutter		O
Handset		O
Hard disk		X
Magnetic card reader		X
Manual feed mechanism		X
Marker		X
Microphone		X
Monitor speaker		O
Remaining memory indicator		O
Speakerphone		X
Video Processing Features
Contrast		O
Halftone (Basic & Error Diffusion)		O
MTF		O
Reduction		O
Resolution		O
Smoothing - 8 x 3.85 to 8 x 7.7		O
Smoothing - 8 x 7.7 to 8 x 15.4		X
Communication Features - Auto
Automatic fallback		O
Automatic redialling		O
Confidential reception		A
Dual Access		O
Substitute reception		O
Transmission Reserve		O

OVERALL MACHINE INFORMATION FEATURES

Communication Features -

User Selectable

	Action as a transfer broadcaster	X
	AI Redial	O
	Alternative Destination	O
	Answering machine	X
	Authorized Reception	O
	Auto-answer delay time	X
	Auto dialling (pulse or DTMF)	O
	Auto Document	O
	Automatic Voice Message	X
	Auto-note	X
	Batch Transmission (max 5 files)	A
	Broadcasting	O
	Chain Dialling	O
	Confidential ID Override	O
	Confidential Transmission	O
	Forwarding (4 stations)	A
	Free Polling	O
	Groups (7 groups)	O
	Hold	O (G)
	Immediate Redialling	O
	Immediate transmission	O
	Keystroke Programs	O
	Mailbox	C
	Memory transmission	O
	Notify	X
	On Hook Dial	O (G)
	Page Count	O
	Personal Codes	O
	Personal Codes with Conf ID	A
	Polling Reception	O
	Polling Transmission	O
	Quick Dial (30)
	Reception modes (Fax, Tel, Auto)	O
	Reduction	X
	Remote control features	O
	Remote Transfer	O
	Restricted Access (10 codes,	O
	without cards)
	Secured Polling	O
	Secured Polling with Stored ID	O
	Override
	Send Later	O
	Silent ringing detection	X

1-2

OVERALL MACHINE INFORMATION FEATURES

Speed Dial (100)

Telephone Directory		O
Tonal Signal Transmission		O
Transfer Request: 30 stations		O
Transmission Deadline		X
Turnaround Polling		X
Voice Request		O
Communication Features -
Service Selectable
AI Short Protocol		X
Auto-reduction override option		X
Busy tone detection		O
Closed network (tx and rx)		O
Continuous Polling Reception		O
Dedicated tx parameters		O
ECM		O
EFC		O
MV1200 compatibility		X
Page retransmission		O
Page separation mark		X
Polling tx file lifetime in the SAF		O
Protection against wrong conn.		O
Resol’n stepdown override option		X
Short Preamble		O
Well log		O
Other User Features
Auto Service Call		X
Center mark		X
Chequered mark		X
Clearing a memory file		O
Clearing a polling file		O
Clock		O
Confidential ID		A
Copy mode		O
Counters		O
Dialled number check		X
Direct entry of names		O
Function Programs		O
ID Code		O
Label Insertion		O
Language Selection		O
LCD contrast control		Service
Memory Lock		A
Memory Lock ID		A
Modifying a memory file		X

November 30th, 1991
Multi Sort Document Reception	X		1
Multicopy mode	X
Night Timer	X
Own telephone number	O
Printing a memory file	O
RDS on/off	O
Reception Mode Switching Timer	O
Reception Time (non-memory rx	O
only)
Remote ID	O
Reverse Order Printing	X
RTI, TTI, CSI	O (S)
Speaker volume control	O
Specified Cassette Selection	X
Substitute reception on/off	O
Telephone line type	O (S)
TTI on/off	O
User Function Keys	X
User Parameters	O
Wild Cards	O
Reports - Automatic
Charge Control Report	X
Communication Failure Report	O
Confidential File Report	A
Error Report	O
Memory Storage Report	O
Mode Change Report	X
Polling Clear Report	O
Polling Reserve Report	O
Polling Result Report	O
Power Failure Report	O
Journal	O
Transfer Result Report	X
Transmission Result Report	O
Reports - User-initiated
Authorized Reception List	O
Charge Control Report	X
File List	O
Forwarding List	O
Group List	O
Personal Code List	O
Program List	O
Quick Dial List	O
Specified Cassette Selection List	X
Speed Dial List	O

1-3

November 30th, 1991

Reports - User-initiated

Journal	O
Transmission Status Report	X
User Function List	X
User Parameter List	O
Service Mode Features
Back-to-back test	O
Bit switch programming	O
Buzzer test	O
Cable equalizer (rx only)	O
Comm. parameter display	O
DTMF tone test	O
Echo countermeasure	O
Error code display	O
LCD contrast control	O
Memory file forwarding	O
Memory file printout (all files)	O
Modem test	O
NCU parameters	O
Operation panel test	O
Printer mechanism test	X
Printer test patterns	O
Programmable attenuation	X
Protocol dump list	O
RAM display/rewrite	O
RAM dump	O
Ringer test	X
Scanner lamp test	O
Scanner mechanism test	O
Sensor initialization	O
Serial number programming	O
Service monitor report	O
Service station number	X
System parameter list	O
Technical data on the Journal	O
Thermal head parameters	O
Transmission Status Report	X

OVERALL MACHINE INFORMATION FEATURES

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
COMPONENT LAYOUT

1.3. COMPONENT LAYOUT

1

1.3.1. Mechanical Components

1

2

3

4

5

6

7

8

9

10

11

19

18

17	16	15	14	13	12
1.	R2 Rollers			Feed the document through the scanner.
2.	Exposure Glass			Exposes the original to light from the xenon lamp.
3.	Xenon Lamp			Illuminates the document.
4.	R1 Rollers			Feed the document through the scanner.
5.	Separation Roller			Allows one page into the scanner.
6.	Document Feed Roller			Feeds the document into the scanner.
7.	Separation Plate			Spreads out the leading edges of the pages fed into the
				scanner.
8.	Pick-up Roller			Picks up pages of the document from the document
				table.
9.	Lens Block			Focuses light reflected from the document onto the
				CCD.
10.	CCD (Charge Coupled			This converts the light reflected from the document into
	Device)			an analog video signal.
11.	Thermal Paper Roll			Thermal paper for printing.
12.	Shading Plate			Allows more light through from the ends of the xenon
				lamp than from the centre, to counteract the relative
				dimness at the ends of the lamp.
13.	Second Mirror			Reflects light from the document towards the CCD.
14.	Thermal Head			Prints received data on the thermal paper.
15.	Platen Roller			Feeds the paper through the printer.
16.	Cutter			Cuts off the printed page.
17.	Feed-out Rollers			Feed out the page which has been cut off.
18.	First Mirror			Reflects light from the document towards the CCD.
19.	Third Mirror			Reflects light from the document towards the CCD.

1-5

November 30th, 1991	OVERALL MACHINE INFORMATION
	COMPONENT LAYOUT

1.3.2. Drive Components

1 2 3 4 5 6

	10	9	8	7
1.	R2 Roller Drive Gear			Drives the R2 roller.
2.	Scanner Drive Gear			Transfers drive from the Tx motor to the
				scanner and ADF.
3.	R1 Roller Drive Gear			Drives the R1 roller.
4.	Document Feed Idle			Transfers drive from the Tx motor to the
	Gear			document feed roller.
5.	ADF			Drive the document feed roller, which feeds
	Clutch/Document			the document into the scanner.
	Feed Drive Gear
6.	Tx Motor			Drives the ADF and scanner.
7.	Rx Motor			Drives the printer.
8.	Printer Drive Gears			Transfer Rx motor drive to the printer.
9.	Platen Roller Drive			Drives the platen roller, which pulls the
	Gear			thermal paper through the printer
10.	Feed-out Roller Drive			Drives the feed-out roller, which feeds the
	Gear			printed copy out of the machine.

1-6

OVERALL MACHINE INFORMATION	November 30th, 1991
COMPONENT LAYOUT

1.3.3. Electrical Components
			1
1	2
23		3
22
		4
21
		5
20
		6
19		7

18			8
		9
17		10
16
	15
	14	11
	13	12
Name		Description	No.
PCBs
FCU	This board controls the machine.		11
MBU	This board contains the system ROM and RAM		8
	for storing system parameters such as bit switch
	settings and programmed telephone numbers.
SBU	This board contains the CCD.		10
OP-PORT	This board controls the operation panel.		23
NCU	This board contains relays and switches for		4
	interfacing the machine to the telephone network
	and the handset.
PSU	This board supplies power to the machine.		7
Xenon Lamp	This supplies power to the xenon lamp.		14
Driver
MOTORS
Tx Motor	This drives the scanner.		5
Rx Motor	This drives the printer.		6
Cutter Motor	This drives the cutter.		1

1-7

November 30th, 1991	OVERALL MACHINE INFORMATION
	COMPONENT LAYOUT
Name	Description	No.
CLUTCHES
ADF Clutch	This transfers drive from the tx motor to the	3
	document feed roller.
SENSORS
Document Sensor	This detects the presence of a document in the	22
	feeder.
Scan Line Sensor	This detects when a page is approaching the	21
	auto shading position.
Trailing Edge Sen-	This detects when the trailing edge of the page is	20
sor	passing the scan line.
Paper End Sensor	This detects when the thermal paper has run out.	16
Printer Jam Sen-	This detects jams in the printer.	18
sor
Cutter Sensor	This monitors the operation of the cutter.	2
Cover Switch	This detects whether the cover is open or closed.	15
OTHERS
Thermal Head	This prints on the thermal paper.	17
SAF Memory Mod-	These memory modules each contain 1 Mbyte of	9
ules	memory for storing fax messages.
Speaker	This allows the user to listen to the condition of	12
	the telephone line.
Xenon Lamp	This lamp illuminates the document.	19
Battery	This rechargeable battery backs up the SAF	13
	memory when the main power is switched off.

1-8

OVERALL MACHINE INFORMATION	November 30th, 1991
OVERALL SYSTEM CONTROL

1.4. OVERALL SYSTEM CONTROL

1

Line

Handset

Scanner

Sensors

NCU

Speaker

PSU

Scanner and Printer Drive

Components and Sensors

Operation

Panel

Modem AFE

		CONTROL SIGNALS
		Video Processing		Thermal
		Memory		Head
		CPU	I/O	RS-232C
			Port
	SBU	Video
				Interface
	(CCD)	Processor
		DATA AND ADDRESS BUS

ROM

MBU

SAF	ECM
Memory	Memory
RAM	FCU

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 performs 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.

1-9

November 30th, 1991	OVERALL MACHINE INFORMATION
	VIDEO DATA PATH

1.5. VIDEO DATA PATH

										The following diagrams show
1.5.1. Transmission										the data path for this model.
					Original
	Reference:
	Group 3
	Facsimile									CCD
	Manual,
				Xenon
	section									Analog Signal
				Lamp
	1-3-1

ECM	SAF	Video	CPU
Memory	Memory	Processor
			Modem
			(Digital)

MODEM	Modem
AFE	(Analog)

Line	FIFO	FCU
Buffer
	RAM

MBU

To the

Network

(via the NCU)

1.5.2. Reception

Reference:

Group 3

Facsimile

Manual, section 1-3-2

	From the	Filter	Modem	MODEM
	Network
			(Analog)	AFE
	(via the NCU)
		HYBRID IC
	FCU		Modem
			(Digital)
	SAF	ECM	CPU
	Memory	Memory

I/O Port

Line		FIFO	Thermal
Buffer
	RAM		Head
	MBU

Thermal

Paper

1-10

OVERALL MACHINE INFORMATION	November 30th, 1991
POWER DISTRIBUTION

1.6. POWER DISTRIBUTION			1
1.6.1. Distribution Diagram
		Motors, ADF Clutch
		Xenon Lamp
		+24VD
		NCU
		+5V
Thermal	+5V	+24VS
			+5V
Head
			MBU
		FCU
+24VD
			+5V
		+5V	RS-232C
	+5V		Interface
	+24VS	+12V	+5V
		Regulator	SBU
			+12V

	+24VD		+24VS
		+24VD		+5V
PSU	-12V			OPU
		Regulator
			- 5V	+5V
	+5V		- 12V	Scanner
Printer
				Sensors
Sensors

The PSU supplies power to the machine through the FCU, except for the thermal head power, which it supplies directly. The FCU contains regulators which generate other voltages needed by the machine.

There are two + 24V power supplies:

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

∙+ 24VD: This is switched on by the cpu when a ringing signal is detected, or when the user presses the Start or Copy key. It is not interrupted if the cover switch is opened; however, printing stops and the document is fed out.

In some documentation for this model, + 24VD may sometimes be referred to as + 24VA.

1-11

November 30th, 1991	OVERALL MACHINE INFORMATION
	POWER DISTRIBUTION

1.6.2. Memory Back-up Circuit

+5V

MBU

FCU

RAM

Switching

Voltage

Circuit

1-

11

1-11

Detector

1

-9

1-9

Battery

Reference:

Switch

Group 3

Real Time

Facsimile

[A]

Battery

Clock

Manual,

section 1-4-3,

Circuit type 1

CPU

Memory

+5V

Monitor

+24V

Switching

Circuit

Regulator

SAF

Memory

5-1 5-2

[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 supply.

A rechargeable battery [B] backs up the SAF memory and the real time clock for 1 hour. When the main power is switched on, the + 24V supply charges the battery. If there is data in the SAF, the battery also backs up the real time clock, to preserve the MBU battery.

1-12

DETAILED SECTION DESCRIPTIONS	November 30th, 1991
SCANNER

2. DETAILED SECTION DESCRIPTIONS

2.1. SCANNER

2.1.1. Mechanisms

1. Document Detection

Scan Line Sensor

2

ADF Clutch

Trailing Edge

Sensor

Document

Sensor

Separation

Plate

Feed	Pick-up Roller
Roller	Separation Roller

∙The machines in this series have an A4-width [8.3"] scanner. There is no document width detector.

∙The scanner contains a xenon lamp.

∙There is no shutter mechanism.

Reference: Group 3 Facsimile Manual, section 2-1

2-1

November 30th, 1991	DETAILED SECTION DESCRIPTIONS
	SCANNER

2. Pick-up and Feed

Mechanism

Reference:

Group 3

Facsimile

Manual, section 2-2-1.

Tx Motor

ADF Clutch

∙This machine uses an electrical clutch mechanism with trailing edge sensor.

∙There is no manual feed.

Resolution

Standard - The tx motor feeds the document at 7.7 lines/mm. The 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 resolution, the tx motor feeds the paper at 7.7 lines/mm, and the data is transmitted using Detail resolution.

Jam Conditions

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

∙The scan line sensor does not switch on within 3.5 s of the Start key being 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.

2-2

DETAILED SECTION DESCRIPTIONS	November 30th, 1991
SCANNER

2.1.2. Video Data Processing
	Output from the CCD
A
		Auto Shading
		Memory
	WHITE
	WAVEFORM
			FEEDBACK		2
		A/D		Peak
DC	Amplifier	Converter		Hold
Filter

CORRECTED

DATA

Data Processing

Circuits

VIDEO

To the CPU

PROCESSOR

and Modem

Reference:

Corrected Data from the Auto Shading Circuit

Group 3

Facsimile

Manual,

Error

Gamma

Basic

section 2-3.

Diffusion

Correction,

Halftone

Halftone

MTF

Process

Process

	EDGE
Edge	ELEMENTS
Detection

	Comparator	NON-EDGE
			Image/Text
		ELEMENTS
			Detection

Reduction

Background

Detection

	OR	Halftone
	Processing

Reduction

A

B

B’

Process Selector

To CPU and Modem

2-3

November 30th, 1991	DETAILED SECTION DESCRIPTIONS
	PRINTER

2.2. PRINTER

2.2.1. Mechanisms

1. Paper Feed

Mechanism

One-way Clutch

Feed-out

Roller

Platen Roller

Reference:

Group 3

Facsimile

Manual, section 3-4-1.

Rx Motor

The printer is an A4-width [8.3"] printer.

Resolution

Standard - Each received line is printed 4 times

Detail - Each received line is printed twice

Fine - Each received line is printed once.

2-4

DETAILED SECTION DESCRIPTIONS	November 30th, 1991
PRINTER

Jam Detection
The cpu detects a copy jam if one of the following conditions occurs:
∙ If the printer jam sensor still does not detect paper after the minimum
copy length has been fed since the start of printing.
∙ Between pages of a multipage printout, the printer jam sensor switches
off. A jam is detected if the sensor does not switch back on after the
minimum copy length has been fed since it turned off.
∙ If the printer jam sensor still detects paper after the end of the feed-out	2
procedure for the last page of a print run.

2. Cutting

Cutter

Blade

Reference:
Group 3	Cutter
Facsimile
Manual,	Sensor
section 3-6.
	Cutter
	Motor

The cutter mechanism is exactly as described in section 3-6 of the Group 3 Facsimile Manual.

3. Cutter Jam Detection

A cutter jam is detected if one of the following conditions occurs:

∙If the cutter sensor does not open within 0.25 s after the cutter starts to move

∙If the cutter sensor stays open for more than 1.0 s

If a cutter jam is detected, the cutter motor reverses to return the cutter to the standby position.

2-5

November 30th, 1991	DETAILED SECTION DESCRIPTIONS
	PRINTER

2.2.2. Circuits

1.Video Data Processing

∙Smoothing is as described in section 3-5-1 of the Group 3 Facsimile

Manual

∙There is no reduction.

2.Thermal Head

Both machines use an A4-width [8.3"] thermal head. Refer to section 3-5-2 of the Group 3 Facsimile Manual for a circuit diagram.

The operation of the thermal head is as explained in the Group 3 Facsimile Manual, except that when printing a line, blocks 0 and 1 are printed together, then blocks 2 and 3 are printed together.

The data are printed as explained in section 3-5-3 of the Group 3 Facsimile

Manual. In Fine mode, the pulse width is automatically increased by 50%.

The machine prevents overheat protection by adjusting the pulse width in accordance with the temperature measured by the thermistor on the thermal head.

Reference: Group 3 Facsimile Manual, sections 3-5-1, 3-5-2, and 3-5-3.

2-6

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

2.3. PCBs AND THEIR FUNCTIONS

2.3.1. FCU

Scanner

Sensors

Operation

Panel

Line Handset

Speaker

NCU

PSU

Scanner and Printer Drive

Components and Sensors

2

Modem AFE

HIC

Drivers

CONTROL SIGNALS

FCU

Video Processing

Thermal

Memory

Head

			CPU	I/O	RS-232C
	SBU	Video		Port
					Interface
	(CCD)	Processor

DATA AND ADDRESS BUS

ROM

RAM

Memory Back-up
					SAF		ECM
	Control
					Memory		Memory

MBU

2-7

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

∙Thermal head control

∙Tx/Rx/cutter motor drive control

∙Operation panel control

3.Modem Analog Front End (Modem AFE)

∙Modem (analog operations)

∙Attenuation

4.Video Processor (VPP)

∙Analog/digital video signal processing

5.Driver (MFPD)

∙Tx/Rx/cutter motor drive

6.Driver Array

∙Xenon lamp/ADF clutch drive

7.Hybrid IC (HIC)

∙Gain control for rx data

∙Filters

8.RAM

∙128k for ECM (no back-up)

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

2-8

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

2.3.2. MBU

System	MBU
ROM

DATA AND ADDRESS BUS

2

Memory Back-up	System
Control	RAM

+

To/From										To/From
FCU										FCU

1.System ROM

∙Contains the software to run the machine

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

2-9

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

2.3.3. SBU

Analog Video	Drive Clocks
To the FCU	From the FCU

	Drivers
	CCD
	+12V
+12V		Inverter
		Amplifier
+
	Emitter	SBU
	Follower

2.3.4. OPU

		Operation Panel	Operation Panel
	LCD Panel	Keys	LEDs
	Auxiliary Operation	Operation Panel		Output
				from the
	Panel Controller	Controller
				Scanner
				Sensors

Serial Interface

To/From FCU

2-10

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

2.3.5. NCU

1. PCB Block Diagram

L1	Di Relay	Ds Relay	Tx/Rx Data	2
			To/From FCU
Protection	Filter
Circuit

L2		Line
	To
		Current
	Network
FG		Detector	Oh
			Relay		To
		Gs Relay
				Ringing	FCU
				Signal
GS				Detector
T1

To	Filter
Handset

	T2	From FCU
	Relay
	Driver

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.

2-11

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

2. Signal and Jumper Settings

The following table shows the jumper positions for each country, and the status of the relay control signals (CN3-A7, B7, and A8). The country is selected by the Country Code for NCU Parameters (NCU Parameter 00; use Function 96).

Standby Mode

After Ringing Detection

Jumpers

CN3-

CN3-

CN3-

CN3-

CN3-

CN3-

TB1

TB

TB

TB

TB

TB

JP

A7

B7

A8

A7

B7

A8

& 2

3

8

4

5

6

1

Germany

X

X

X

O

O

X

O

X

X

X

X

X

X

UK

X

O

X

O

O

X

O

X

X

X

X

X

X

Italy

O

O

X

O

O

X

O

X

X

X

X

X

X

Austria

O

O

X

X

X

X

O

X

X

O

X

X

X

Belgium

O

O

X

X

X

X

O

X

X

X

X

X

X

Denmark

O

O

X

X

X

X

O

X

X

X

X

O

X

Finland

O

O

O

O

O

X

O

X

X

X

X

X

X

Ireland

O

O

X

X

X

O

O

X

X

X

X

X

X

Norway

X

O

X

X

X

O

O

X

X

X

X

X

O

Sweden

X

X

X

X

X

X

O

X

X

X

X

X

X

Switz.

X

O

X

X

X

X

O

O

O

X

X

X

X

Portugal

O

O

X

X

X

X

O

X

X

X

X

O

X

Holland

O

O

X

X

X

O

O

X

X

X

O

X

X

Hg Kong

X

O

X

O

O

X

O

X

X

X

X

X

X

S. Africa

O

O

O

O

O

X

O

X

X

X

X

X

X

Australia

X

O

X

O

O

X

O

X

X

X

X

X

X

N. Z’land

X

O

X

O

O

X

O

X

X

X

X

X

X

Israel

O

O

X

O

O

X

O

X

X

X

X

X

X

Spain

O

O

X

X

X

X

O

X

X

X

X

O

X

Singapore

O

O

X

O

O

X

O

X

X

X

X

X

X

Malaysia

X

O

X

O

O

X

O

X

X

X

X

X

X

Key

Signal Status: O = High, X = Low

Jumper Settings: O = Closed, X = Open

2-12