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
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A639 |
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A804 |
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(Existing Fax Unit) |
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(New Fax Unit) |
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Base Copier to be used with |
A193 Copier |
A193 and A224 Copiers |
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Refer to the diagram below for all possible combinations. |
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Original Scan Speed |
Standard: 1.6 s |
Standard: 1.3 s |
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Detail: 1.6 s |
Detail: 1.3 s |
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Fine: 3.3 s |
Fine: 2.6 s |
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SAF Memory Capacity |
Standard: 1MB (80 pages) |
Standard: 2MB (160 pages) |
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(Measured using an ITU-T |
With 2MB option: 3MB (240 |
With 2MB option: 4MB (320 |
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#1 Test Chart at Standard |
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With 4MB option: 5MB (400 |
With 4MB option: 6MB (480 |
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pages) |
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With HDD option: 80MB |
With HDD option: 80MB |
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(1200 pages) |
(1200 pages) |
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Options |
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Feature Expander |
Same as A639 Fax Unit. |
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2M/4M/80M |
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Function Upgrade Card |
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400dpi Page Memory Card |
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ISDN G4 |
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Possible Combinations and Results |
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A193 |
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A639 |
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A |
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O K |
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Copier |
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Fax Unit |
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A224 |
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A639 |
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NG |
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Copier |
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Fax Unit |
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A193 |
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A804 |
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Copier |
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Fax Unit |
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A224 |
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A804 |
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Copier |
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Fax Unit |
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A804V501.wmf
1
OVERALL INFORMATION |
May 12, 1997 |
1.2 OVERALL MACHINE CONTROL
Function |
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HDD |
80MB |
Page |
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Upgrade |
Expander |
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Memory |
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Interface |
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Card |
2M/4M |
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HDD |
Card |
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ISDN |
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G4 |
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Lower Left |
Upper |
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Lower Right |
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S C P |
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DRAM |
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(3.5MB) |
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CPU BUS |
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DMA BUS |
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Flash ROM |
SRAM |
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R144EFXL |
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VIF |
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(2MB) |
(128kB) |
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M o d e m |
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F C U
Analog Circuit
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Bus Interface |
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Monitor |
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NCU |
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BiCU |
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Parallel Interface |
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Speaker |
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Serial Interface |
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A804V500.wmf |
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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.
2
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
3
DETAILED DESCRIPTIONS |
May 12, 1997 |
2.1.1 Portrait Original - Side Binding
Original |
Feed-in Direction |
Black - Front Side
Gray - Back Side
Original |
Feed-in Direction |
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Transmitted Image |
T o p |
o t t o m |
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B |
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Transmitted Image |
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(Rotated before Transmission) |
T o p |
o t t o m |
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B |
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Transmitted Image |
T o p |
o t t o m |
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B |
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A804D501.wmf |
4
May 12, 1997 |
DETAILED DESCRIPTIONS |
2.1.2 Portrait Original - Top Binding
Original |
Feed-in Direction |
Black - Front Side
Gray - Back Side
Original |
Feed-in Direction |
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Transmitted Image |
Top |
Bottom |
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Transmitted Image |
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(Rotated before Transmission) |
Top |
Bottom |
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Transmitted Image |
Top |
Bottom |
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A804D502.wmf |
5
DETAILED DESCRIPTIONS |
May 12, 1997 |
2.1.3 Landscape Original - Side Binding
Original |
Feed-in Direction |
Black - Front Side
Gray - Back Side
Original |
Feed-in Direction |
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Transmitted Image |
Top |
ottom |
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B |
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Transmitted Image |
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(Rotated before Transmission) |
Top |
ottom |
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B |
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Transmitted Image |
Top |
ottom |
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B |
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A804D503.wmf |
6
May 12, 1997 |
DETAILED DESCRIPTIONS |
2.1.4 Landscape Original - Top Binding
Original |
Feed-in Direction |
Black - Front Side
Gray - Back Side
Original |
Feed-in Direction |
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Transmitted Image |
T o p |
o t t o m |
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B |
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Transmitted Image |
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(Rotated before Transmission) |
T o p |
o t t o m |
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B |
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Transmitted Image |
T o p |
o t t o m |
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B |
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A804D504.wmf |
7
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