Ricoh cif-e Technical Bulletin

RICOH Technical

Revised: 15-Dec-99

Bulletin

PAGE: 1/6

Model:

RTB Correction

The information underlined below has been added.

Subject:
From:
Classification:

It was reported in the Japanese market that image quality problems or SC326 occur due to
a defective BUSSW board in the Interface Kit. This RTB outlines the troubleshooting
procedure.

Iris/Lilac (Controller Interface Type E)

SC326 / Abnormal Image

Technical Service Dept., GTS Division

Troubleshooting
Mechanical
Paper path
Other ( )

Part information
Electrical
Transmit/receive

Date:

15-Nov-99

Prepared by:

Action required
Service manual revision
Retrofit information

T. Itoh

No.:

RA258014a

SYMPTOM

1. Blank I mage or Vertic al Li nes

2. SC326

NOTE:

This problem occurs in copy or scanning mode only. It does not occur during print
jobs.

CAUSE

Normally, the input pins (#12 to 17) of IC18 on the BUSSW board are not used for the
function of the IC18. However, due to an error in the software programmed in IC18, these
pins were allocated as output pins. The resulting increase in power consumption causes
the IC to heat up and malfunction.

NOTE:

1. Blank I mage or Vertic al Li nes
When the IC does not renew the scanned image data due to the cause explained above,

blank image or vertical lines appear on the outputs depending on the image of the first line
scanned in.

2. SC326

After analysis and testing of the PCBs returned from the field, it was found that the
cause explained above was a majority of the causes. The other causes are
isolated cases.

If the first line scanned in is blank, the output is blank.

·

If the first line scanned in contains an image, the output will contain vertical lines.

·

When the IC does not send the LSYNC signal to the ASIC, the FGATE signal canno t be
generated (causing SC326).

RICOH Technical

Revised: 15-Dec-99

Bulletin

PAGE: 2/6

Model:

Iris/Lilac (Controller Interface Type E)

Date:

15-Nov-99

No.:

RA258014a

SOLUTION

On the production line

The BUSSW board has been modified twice as shown below. The boards thought to be
causing the problem are #A8485108. The problem does not occur with the Interface Kits
containing #A8485105 or #A8485112, as these boards do not use IC18.

Model Code Modification (1)

Old P/N New P/N

A848-17, 27, 55, 65 A8485105 A8485108

Modification (2)

Old P/N New P/N

A8485108 A8485112

- Additional Information – Modification ­As shown in the picture, there are two

types of BUSSW board (P/N #A8485108).
Type 1 is the board on which an IC [A] has
been manually soldered. Type 2 contains
an IC18 soldered onto the circuit pattern
by machine.

[A]

Type 1

[A]

Type 2

Type 1 is the board that was modified in
the production (from #A8485 105). This
board contains one of the two ICs as
shown in the picture to the right [A]. The
only difference is in the size.

The function of the additional IC and IC18
is exactly the same. IC18 is soldered onto
the reverse side of the Type 2 board.

Cut-in Serial Number
Modification (1)

Product Code Cut-in Serial Number

A848-17 H0990300475
A848-27 H0990300944
A848-55 From first mass production
A848-65 From first mass production

NOTE:

IC18 was added to the PCB for both
Japanese and overseas versions
since the board was used for all
machines.