Ricoh AD1FAX Service Manual adfax2

FAX UNIT TYPE 250

- NEW -

(Machine Code: A804)

SERVICE MANUAL

Important Notices

1. There are two types of FAX UNIT TYPE 250. The existing one (machine code: A639) is only for the A193 copier, and the new one (machine code: A804) is for the A193 and A224 copiers.

To prevent the existing type of fax unit from being installed in the A224 copier, carefully check the machine codes of the copier and the fax unit before installation.

2. This manual describes only the diferential information between the existing and new FAX UNIT TYPE 250, and information updated since the A639 Fax Unit was released.

May 12, 1997 OVERALL INFORMATION

1. OVERALL INFORMATION

1.1 SPECIFICATIONS

A639

(Existing Fax Unit)

Base Copier to be used with

Original Scan Speed

SAF Memory Capacity (Measured usi ng an ITU-T #1 Test Chart at Standard resolution)

Options

A193 Copier A193 and A224 Copi er s Refer to the diagram below for all possible combinations. Standard: 1.6 s

Detail: 1.6 s Fine: 3.3 s

Standard: 1MB (80 pages) With 2MB option : 3MB ( 240 pages) With 4MB option : 5MB ( 400 pages) With HDD option: 80MB (1200 pages )

Feature Expander 2M/4M/80M Function Upgrade Card 400dpi Page Memory Card ISDN G4

Possible Combinations and Results

A193

Copier

A804

(New Fax Unit)

Standard: 1.3 s Detail: 1.3 s Fine: 2.6 s

Standard: 2MB (160 pages) With 2MB option : 4MB ( 320 pages) With 4MB option : 6MB ( 480 pages) With HDD option: 80MB (1200 pages )

Same as A639 Fax Unit.

A639

Fax Unit

A224

Copier

A193

Copier

A224

Copier

A639

Fax Unit

A804

Fax Unit

A804

Fax Unit

A804V501.wmf

OVERALL INFORMATION May 12, 1997

1.2 OVERALL MACHINE CONTROL

ISDN

Flash ROM

(2MB)

Function

Upgrade

Card

Lower Left

CPU BUS

Feature

Expander

2M/4M

Upper Lower Right

SCP

SRAM

(128kB)

HDD

Interface

R144EFXL

Modem

80MB

HDD

DRAM

(3.5MB)

DMA BUS

Page

Memory

Card

VIF

Analog Circuit

FCU

Bus Interface Parallel Interface Serial Interface

Monitor

Speaker

NCU

BiCU

A804V500.wmf

The system block diagram is the same as the current A639 Fax Unit, except for the following:

The DRAM size is increased to 3.5MB (SAF - 2MB, Page Memory -

•

1MB, ECM - 128kB, and Buffer - 384kB) The clock speed used between VIF and BiCU is increased from

•

7.03MHz to 10.55 MHz.

May 12, 1997 DETAILED DESCRIPTIONS

2. DETAILED DESCRIPTIONS

2.1 DOUBLE-SIDED ORIGINAL TRANSMISSION

This function becomes available with both A639 and A804 Fax Units if the opptional Automatic Reverse Document Feeder (A661).

Using this function allows the machine to scan and transmit double-sided originals. However, in some cases, the transmitted image orientations differ between odd and even number pages, because of the ARDF switch-back mechanism and the image rotation before transmision function.

The following diagrams show how images are transmitted in various cases. However, the transmitted image may not be the same as the image printed at the other end due to the receiver’s printing functions (e.g., image rotation printing).

Cross Reference

Image Rotation On/Off - Scanner Switch 0F, bit 0

DETAILED DESCRIPTIONS May 12, 1997

2.1.1 Portrait Original - Side Binding

Transmitted Image

Original

Feed-in Direction

- Front Side

Black

- Back Side

Gray

Original

Top

Bottom

Transmitted Image

(Rotated before Transmission)

Bottom

Transmitted Image

Bottom

Feed-in Direction

A804D501.wmf

May 12, 1997 DETAILED DESCRIPTIONS

2.1.2 Portrait Original - Top Binding

Transmitted Image

Original

Feed-in Direction

- Front Side

Black

- Back Side

Gray

Original

Top

Bottom

Transmitted Image

(Rotated before Transmission)

Bottom

Transmitted Image

Bottom

Feed-in Direction

A804D502.wmf

DETAILED DESCRIPTIONS May 12, 1997

2.1.3 Landscape Original - Side Binding

Transmitted Image

Original

Feed-in Direction

- Front Side

Black

- Back Side

Gray

Original

Top

Bottom

Transmitted Image

(Rotated before Transmission)

Bottom

Transmitted Image

Bottom

Feed-in Direction

A804D503.wmf

May 12, 1997 DETAILED DESCRIPTIONS

2.1.4 Landscape Original - Top Binding

Transmitted Image

Original

Feed-in Direction

- Front Side

Black

- Back Side

Gray

Original

Top

Bottom

Transmitted Image

(Rotated before Transmission)

Bottom

Transmitted Image

Bottom

Feed-in Direction

A804D504.wmf

+ 17 hidden pages