Ricoh infotec 3671F User manual

FX7
RICOH FAX1700L
SERVICE MANUAL
July 30th, 1996
Subject to change

FX7
infotec 3671/3671F
SERVICE MANUAL
July 30th, 1996
Subject to change

IWARNING
THIS MACHINE CONTAINS A LASER BEAM GENERATOR. LASER
BEAMS CAN CAUSE PERMANENT EYE DAMAGE. DO NOT OPEN THE
LASER UNIT OR LOOK ALONG THE LASER BEAM PATH WHILE THE
MAIN POWER IS ON.
Lithium Batteries (Memory Back-up)
ICAUTION
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.

1. OVERALL MACHINE INFORMATION
1.1. SPECIFICATIONS
Type
Desktop type transceiver
Circuit
PSTN, PABX
Connection
Direct couple
Document Size
Length:
105 - 355.6 mm [4.1 - 14 ins]
(automatic feed)
Up to 600 mm [23.6 ins] (manually assisted)
Width:
148 - 216 mm [5.8 - 8.5 ins]
Thickness:
0.05 to 0.2 mm [2 to 8 mils]
(equivalent to 50 - 90 g/m2)
Document Feed
Automatic feed, face up
ADF Capacity
30 sheets (using 20 lb. or 80 g/m2paper)
Scanning Method
Contact image sensor
Maximum Scan Width
204 mm [8.0 ins]
Scan Resolutions
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
SAF: 240 kbytes (18 pages/ITU-T #1 test
document), extra 1 Mbyte memory card
available (102 pages) or 2 Mbyte memory
card available (186 pages)
Compression
MH, MR, EFC, MMR, SSC
Protocol
Group 3 with ECM
Modulation
V.17 (TCM), V.29 (QAM), V.27ter (PHM),
V.21 (FM)
Data Rate (bps)
14400/12000/9600/7200/4800/2400
Automatic fallback
Transmission Time
6 s at 14,400 bps; Measured with G3 ECM
using memory for a ITU-T #1 test document
(Slerexe letter) at standard resolution
Printing System
Laser printing, plain paper, dry toner
Paper Size and Capacity
Standard Tray: 150 sheets
(using 20 lb. or 80 g/m2paper)
A4, Letter, Legal, F4
Paper Feed Unit (Optional): 250 sheets
(using 20 lb. or 80 g/m2paper)
A4, Letter, Legal
Maximum Printing Width
216 mm [8.5 ins]
Print Resolutions
Fax and Copy Mode:
Main scan: 16 dots per mm [406 dpi]
Sub scan: 15.4 lines/mm [391 lpi]
Power Supply
USA: (110 - 120 Vac) ±10%, 60 ±3 Hz
Europe/Asia: (220 - 240 Vac) ±10%,
50/60±3 Hz
Power Consumption (Base Machine Only)
USA: Maximum 390 W
Europe/Asia: Maximum 470 W
Operating Environment
Temperature: 15 - 25 °C [59 - 77 °F]
Humidity: 35 - 70 %Rh
Dimensions (W x D x H)
380 x 341 x 219 mm [15.0 x 13.4 x 8.6 ins]
Excluding handset, trays, and optional units
Weight
Approx. 7 kg [15 lb.]
Excluding consumables, handset, trays, and
optional units
July 24th, 1996 OVERALL MACHINE INFORMATION
SPECIFICATIONS
1-1

1.2. FEATURES
KEY: O = Used, X = Not Used,
A = With optional memory only,
B = With optional paper feed unit only
C = With optional handset only
Equipment
ADF O
Book scan X
Built-in handset X
Bypass feed: 1 sheet X
Optional paper feed unit B
Cabinet X
Mechanical Counter X
Cutter X
Handset C
Hard disk X
Manual feed mechanism X
Marker (Stamp) X
Monitor speaker O
Optional printer interface (RS422) X
Video Processing Features
Contrast O
Halftone (Basic & Error Diffusion) O
MTF O
Enlarge/Reduction: Three en-
largements, 4 reductions (50%-
200%) X
Resolution O
Smoothing to 16 x 15.4 l/mm O
Communication Features - Auto
Automatic fallback O
Automatic redialing O
Confidential reception X
Dual Access O
Substitute reception O
Communication Features -
User Selectable
Action as a transfer broadcaster X
AI Redial X
Answering machine interface O
Authorized Reception O
Communication Features -
User Selectable
Auto-answer delay time O
Auto dialing (pulse or DTMF) O
Auto Document X
Auto image density selection X
Auto paper size selection X
Automatic Voice Message X
Batch Transmission (max 35
files) O
Broadcasting O
Chain Dialing O
Communication Result Display X
Confidential ID Override O
Confidential Transmission X
Direct Fax Number Entry O
Economy Transmission X
Fax on demand X
Forwarding X
Free Polling O
Groups (3 groups) O
Group Transfer Station X
Hold X
ID Transmission O
Immediate Redialing O
Immediate transmission O
Keystroke Programs X
Memory transmission O
Multi-step Transfer X
Next Transfer Station X
OMR X
On Hook Dial O
Ordering Toner X
Page Count O
Personal Codes X
Personal Codes with Conf. ID X
Polling Reception O
Polling Transmission X
Polling tx file lifetime in the SAF O
Quick Dial (10 stations) O
Reception modes (Fax, Tel, Auto) O
Length Reduction O
Remote control features X
Remote Transfer X
Restricted Access X
Secured Polling O
OVERALL MACHINE INFORMATION July 24th, 1996
FEATURES
1-2

Communication Features -
User Selectable
Secured Polling with Stored ID
Override O
Secure Transmission X
Send Later O
Silent ringing detection X
Specified Image Area X
Speed Dial (50 stations) O
Super Fine Resolution
(16 x15.4 l/mm : 400 x 400 dpi) X
Telephone Directory X
Tonal Signal Transmission O
Transfer Request X
Transmission Deadline (TRD) X
Turnaround Polling X
Two-step Transfer X
Two in one X
Voice Request X
Communication Features -
Service Selectable
AI Short Protocol O
Auto-reduction override option O
Busy tone detection O
Closed Network (tx and rx) X
Continuous Polling Reception X
Dedicated tx parameters O
ECM O
EFC O
Inch-mm conversion X
Page retransmission times O
Page separation mark O
Protection against wrong conn. O
Resol’n stepdown override option X
Short Preamble X
Well log X
Other User Features
Area code prefix X
Automatic service call Service
Center mark X
Checkered mark X
Clearing a memory file O
Clearing a polling file O
Clock O
Other User Features
Confidential ID X
Copy editing (Erase Center/Mar-
gin) X
Copy mode O
Copy Mode Restriction X
Counters O
Daylight Saving Time O
Destination Check X
Direct entry of names O
File Retention Time X
File Retransmission X
Function Programs X
ID Code X
Label Insertion X
Language Selection O
LCD contrast control Service
Memory Lock X
Memory Lock ID X
Modifying a memory file X
Multi Sort Document Reception X
Multicopy mode O
Own telephone number O
Power Saver (Night Timer and
standby mode) O
Print density control O
Printing a memory file O
RDS on/off O
Reception Mode Switching Timer X
Reception time printing X
Reduction/Enlargement X
Remaining memory indicator O
Remote ID X
Reverse Order Printing X
RTI, TTI, CSI O
Secure ID X
Service Report Transmission O
Speaker volume control O
Specified Cassette Selection X
Substitute reception on/off O
Telephone line type O
Toner Saving Mode O
TTI on/off O
User Function Keys X
User Parameters O
Wild Cards O
July 24th, 1996 OVERALL MACHINE INFORMATION
FEATURES
1-3

Reports - Automatic
Charge Control Report X
Communication Failure Report O
Confidential File Report X
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
TCR (Journal) O
Toner Cassette Order Form X
Transfer Result Report X
Transmission Result Report O
Reports - User-initiated
Authorized Reception List O
Charge Control Report X
File List O
Forwarding List X
Group List O
Personal Code List O
Program List X
Quick Dial List O
Specified Cassette Selection List X
Speed Dial List O
TCR O
Transmission Status Report X
User Function List X
User Parameter List O
Service Mode Features
Auto Paper Select test X
Back-to-back test X
Bit switch programming O
Book mode test X
Buzzer test O
Cable equalizer O
Comm. parameter display O
Counter check O
Country code O
DTMF tone test O
Echo countermeasure O
Effective term of service calls O
Error code display O
Excessive jam alarm O
Service Mode Features
File Transfer O
LCD contrast adjustment O
Line error mark O
Memory file printout (all files) O
Modem test O
NCU parameters O
Operation panel test O
Periodic service call O
PM Call O
Printer mechanism test O
Printer test patterns O
Programmable attenuation X
Protocol dump list O
RAM display/rewrite O
RAM dump O
RAM test O
Ringer test X
Scanner lamp test O
Scanner mechanism test O
Sensor initialization X
Serial number O
Service monitor report O
Service station number O
Software upload/download O
SRAM data download O
System parameter list O
Technical data on the TCR O
Thermal head parameters X
Transmission Status Report X
User data transfer O
Memory Files
Max. number of files: 100
Max. number of stations/file: 30
Max. number of stations overall: 100
OVERALL MACHINE INFORMATION July 24th, 1996
FEATURES
1-4

1
1.3. COMPONENT LAYOUT
1.3.1. Mechanical Components
No. Name Description
1Document Pick-up Roller Picks up the top sheet of the document from the
document table.
2Scanner Roller Feeds the document through the scanner.
3Laser Unit Consists of the LDDR (Laser Diode Driver), focusing
lens, FθLenses, square mirror motor, and other laser
optic components.
4Development Toner
Magazine Consists of the toner supply mechanisum, the toner tank, and the development unit.
5Paper Feed-out Roller Feeds paper out of the machine.
6Hot Roller Heat from this roller fuses the toner to the copy paper.
7Fusing Pressure Roller Applies pressure to the paper during the fusing process
23
4
10
5
78
19
18
17 16
13
14
12 11
9
6
15
H528V501.wmf
July 24th, 1996 OVERALL MACHINE INFORMATION
COMPONENT LAYOUT
1-5

No. Name Description
8Fusing Fan Cools the interior of the machine.
9Transfer Roller Applies a charge to the paper to pull the toner off the
drum and onto the paper.
10 Charge Brush Roller Applies a charge to the drum.
11 Paper Feed Roller Feeds paper from the paper tray into the printer.
12 Paper Separation Pad Allows one sheet into the printer.
13 Paper Pick-up Roller Picks up the top sheet of paper from the tray.
14 OPC Drum Organic Photoconductor Drum.
15 Toner Supply Roller Supplies the toner to the development roller.
16 Development Roller Applies toner to the latent image on the drum.
17 Toner Agitator Stirs up toner in the toner tank.
18 Document Feed-out
Roller Feeds the document out of the scanner.
19 Document Separation Pad Allows one sheet into the scanner.
OVERALL MACHINE INFORMATION July 24th, 1996
COMPONENT LAYOUT
1-6

1.3.2. Electrical Components
67
89
543
2
1
H528V504.wmf
14
15
17
18
20
19
16
27
21
12
11
25
26
24
10
22
13
23
H528V503.wmf
July 24th, 1996 OVERALL MACHINE INFORMATION
COMPONENT LAYOUT
1-7

1. PCBs
No. Name Description
1MCB (Mechacincal
Control Board) Controls the printer part of the machine.
2FCU (Facsimile Control
Unit) Controls the machine.
3NCU (Network Control
Unit) Contains a relay and switches to interface the machine to the network and the handset.
4PCB-R Contains the resistors in the transfer bias circuit,
between the ground plate and ground.
6OPU (Operation Panel
Unit) Consists of the LCD and the key switches.
7High-voltage Power
Supply Supplies high voltages to the charge, transfer, and development bias.
8Scanner Sensor Board Contains the scanner sensors (document, scan line,
document exit), and the ADF cover open sensor.
95V Power Board Generates the +5VE supply.
21 LDDR (Laser Diode
Driver) Drives the laser diode.
23 PSU (Power Supply Unit) Supplies power to the machine.
2. Motors
No. Name Description
20 Tx Motor Drives the scanner rollers.
18 Main Motor This DC stepper motor drives the printer mechanism.
22 Square Mirror Motor This high-speed servomotor drives the square mirror in
the laser unit.
5Fusing Unit Fan Motor Cools the interior of the machine.
OVERALL MACHINE INFORMATION July 24th, 1996
COMPONENT LAYOUT
1-8

3. Sensors
No. Name Description
11 Thermostat Cuts off the ac power supply to the fusing lamp if the
surface temperature exceeds 180°C.
12 Thermistor Is used to monitor the hot roller surface temparature.
13 Toner End Sensor Is used to detect the toner end condition.
10 Registration Sensor Is used to detect when paper is fed into the printer.
14 Paper Exit Sensor Is used to detect when paper is at the fusing unit.
16 Paper End Sensor Is used to detect when the paper tray is empty.
27 Synchronization Detector Is used to synchronize the laser main scan.
4. Others
No. Name Description
15
Contact Image Sensor Reads and converts the light reflected from the
document into an analog video signal.
An LED array which illuminates the document is
included.
17 Document Pick-up
Solenoid When this is energized, tx motor drive is transmitted to the document pick-up roller.
19 Paper Pick-up Solenoid When this is energized, main motor drive is transmitted
to the paper pick-up roller.
25 Fusing Lamp The heat from this lamp fuses the toner to the paper.
24 Speaker Allows the user to listen to the condition of the machine
and the telephone line.
26 Interlock Switch If the top cover is open, this switch cuts off the
+24V(SW) power supply. This component is also used
as a top cover open sensor.
July 24th, 1996 OVERALL MACHINE INFORMATION
COMPONENT LAYOUT
1-9

1.4. OVERALL MACHINE CONTROL
The FCU controls the entire system of the machine.
The printer components and the optional paper feed unit are controlled by the
MCB. The FCIP in the FCU is connected with the CPU in the MCB through a
synchronized 8-bit serial interface. The line synchronization signal for laser
printing is sent to the FCIP from the MCB.
The scanner components are controlled by the FCU. Video data coming from
the CIS is processed in the FCIP and then sent to the MCB for copying or
sent to the NCU through the modem for transmission.
The operation panel is controlled by the FCU through a serial interface.
MCB
FCU
Operation
Panel
Printer
Components
Optional
Paper Feed
Unit
NCU
FCIP
Serial
Scanner
Components
Data &
Control
Data &
Control
AVIDEO
/STS
/SOD
To the Network
OP-LSI
TRXD
H528D501.wmf
OVERALL MACHINE INFORMATION July 24th, 1996
OVERALL MACHINE CONTROL
1-10

1.5. VIDEO DATA PATH
1.5.1. Transmission
Immediate Transmission:
Scanned data from the contact image sensor passes to the DIP block in the
FCIP. After analog/digital video processing, the DCR block compresses the
data for transmission. The compressed data then passes either to the FIFO
memory or to the ECM memory before it is sent to the telephone line through
the modem.
Memory Transmission:
First, the scanned data is stored in the SAF memory after compression in the
DCR block.
At the time for transmission, the DCR block decompresses the data from the
SAF memory, then compresses it again after handshaking with the other ter-
minal is done. The compressed data then passes either to the FIFO memory
or to the ECM memory, before it is sent to the telephone line through the mo-
dem.
FCU
DRAM
Video
Processing
Memory
Line
Buffer
/FIFO
Memory
ECM/SAF
Memory
CIS Video
Amplifier
DATA/ADDRESS BUS
To the
network
Original
Image Sensor
LED Array
Contact Image Sensor
Assembly
SAF IC
Card
R144EFXL
Modem
Amp
NCU
FCIP
DIP
DCR
Attenuator
HIC
DIP:Digital Image Processor
DCR:Data Compression &
Reconstruction H528v507.wmf
July 24th, 1996 OVERALL MACHINE INFORMATION
VIDEO DATA PATH
1-11

1.5.2. Reception
Data from the line passes to the modem through the NCU and hybrid IC. Af-
ter the modem demodulates the data, the data passes to the DCR block,
through either the FIFO or the ECM memory, where the data is decom-
pressed to raster image data.
The raster image data is then passed to the page memory for printing. After a
page of data has been stored in the page memory, the data is sent to the
MCB through the LIF block in the FCIP, and then to the LDDR.
Copy Paper
DATA/ADDRESS BUS
E144EFXL
Modem
Amplifier
FCIP
MDM
DCR LIF
HIC
NCU
From the Network
Line Buffer
/FIFO
Memory
ECM/SAF
Memory Page Memory
DRAM
MCB
LDDR
FCU
LIF: Laser Interface
DCR:Data Compression &
Reconstruction
MDM: Modem H528v508.wmf
OVERALL MACHINE INFORMATION July 24th, 1996
VIDEO DATA PATH
1-12

1.5.3. Copying
Single copy / Multi-page copy
The scanned data passes to the page memory after video processing in the
DIP block in the FCIP. After a page of data has been stored in the page mem-
ory, the data is sent to the MCB through the LIF block, and then to the LDDR.
This process is the same for multi-page copying.
Original
Image Sensor
LED Array
Contact Image Sensor
Assembly
FCU
CIS Video
Amplifer
Copy Paper
Video
Processing
Memory FCIP
DCR LIF
DIP
Line Buffer
/FIFO
Memory
ECM/SAF
Memory Page Memory
DRAM
MCB
LDDR
SAF
Memory
IC Card
DATA/ADDRESS BUS
LIF: Laser Interface
DCR:Data Compression &
Reconstruction
DIP:Digital Image Processor H528v509.wmf
July 24th, 1996 OVERALL MACHINE INFORMATION
VIDEO DATA PATH
1-13

1.6. POWER DISTRIBUTION
1.6.1. Distribution Diagram
The PSU supplies +24V, +24V(SW), +12V, and ±5V dc power to the FCU.
The +5V Power Board generates +5VE from the +24V suply. The dc supplies
are used as follows.
+24V This is normally on when the main switch is on.
+5VE This is used for the document sensor, operation panel, and NCU. This is
supplied even if the machine is in power saver mode.
+12V This supplies the LED Array in the CIS.
-5V This is used for the image sensor.
+5V This is normally on when the main switch on.
+12VP This is supplied the to Flash ROM and the optional IC card.
+5VD This supplies back up power for the system RAM and the optional IC card. A
lithium battery is used to generate +5VD.
+24V(SW) This is interrupted if the interlock switch opens.
MCB FCU
LDDR
Square
Mirror Motor
Toner End
Sensor
Fusing Fan
Paper
Pick-up
Solenoid
Thermistor
High
Voltage
Paper Supply
Optional
Paper
Feed Unit
Paper
Pick-up
Solenoid
+24V
(SW)
Document
Pick-up
Solenoid
5V
Power Board
PSU
Scanner
Sensor
Board
CIS
Sensor
LED Array
+12V
Fusing
Lamp
Thermostat
Main Switch
AC Main Power
+24V
+24V
Tx Motor
+5V
+5V
+24V(SW)
+5V
+24V(SW)
+24V(SW)
+5V
Main Motor +24V(SW)
+24V(SW) +24V(SW)
+5V
+5VE
+5V
+5V
-5V
+12V
NCU
Option
Panel
IC Card
+5V
-5V
+12V
+24V(SW)
+24V(SW)
+24V
+5VE
+5VE
+5V
+5V
+5VD
+12VD
+24V(SW)
Interlock
Switch
+5V
+24V(SW)
Power
Board
+5VD
+
-
+5VE
+24V
H528v510.wmf
OVERALL MACHINE INFORMATION July 24th, 1996
POWER DISTRIBUTION
1-14

2. DETAILED SECTION DESCRIPTIONS
2.1. SCANNER
2.1.1. Mechanisms
1. Document Detection
The document sensor [A] detects when a document is placed in the ADF. The
fold-out extension [B] helps support longer documents.
2. Pick-up and Separation
When the document pick-up solenoid [A] is turned on, it allows the tray lifting
cam [B] to rotate. This allows the document plate [C] to be pushed up by a
spring under the plate. The document pick-up roller [D] feeds the top sheet of
the document into the scanner. The separation pad [E] prevents the docu-
ment pick-up roller from feeding more than one sheet at the time.
[C]
[B] H528D510.wmf
[A]
H528D511.wmf
[A]
[B]
[D]
[E]
H528D509.wmf
July 30th, 1996 DETAILED SECTION DESCRIPTIONS
SCANNER
2-1

3. Drive Mechanism
The document is fed into the scanner by the scanner roller [A], and fed out by
the exit roller [B]. The tx motor [C] drives the scanner roller and the exit roller.
The document exit sensor detects when the document leaves the scanner.
Note: When a communication error occurrs in immediate tx, the machine
stops scanning the document, then feeds it out of the scanner.
[A]
[C]
[B] H528D512.wmf
[D]
H528D513.wmf
DETAILED SECTION DESCRIPTIONS July 30th, 1996
SCANNER
2-2

4. Image Scanning
The scanner consists of a contact image sensor (CIS) assembly [A] and a
scanner roller [B]. Inside the CIS are an exposure glass [C], a rod lens array
[D], an image sensor [E], and an LED array [F].
The image sensor consists of a row of 1728 photosensitive elements (216
mm width x 8 dots/mm). Light from the LED array is reflected from the docu-
ment and focused onto the image sensor by the rod lens array. Because of
the short optical path inside the CIS, the focal depth is much shorter than for
a CCD type scanner.
The white level adjustment is performed at the factory, then the white level is
stored in the FCU’s SRAM. The white level must be adjusted when the FCU
or the CIS is replaced, or the SRAM is cleared in the field.
The CIS scans the document one line at a time, and outputs an analog signal
for each line. The voltage from each element depends on the intensity of the
light reflected by the document onto the element; the intensity of the light de-
pends on the darkness of the area reflected.
Cross reference
White level adjustment: Service Tables and Procedures (chapter 4) - Function 10,
Shading Test
[A]
[B]
[C]
[D]
[E]
[F]
H528D515.wmf
July 30th, 1996 DETAILED SECTION DESCRIPTIONS
SCANNER
2-3