Ricoh 3800c, J-P1, A-C2, K-P1 Service Manual

echnical Bulletin

T

PAGE: 1/3

Model:

Subject:

From:

K-P1, A-C2, J-P1

Slow Printing from Macintosh

Technical Services Dept., GTS Division

Classification:

Troubleshooting

Mechanical

Paper path

Other ( )

Part information

Electrical

Transmit/receive

Date:

03-Jul-01

Prepared by:

K. Misugi

Action required

Service manual revision

Retrofit information

SYMPTOM

Depending on network conditions, printing from a Macintosh is very slow.

This symptom occurs in the following machines:
Model K-P1 (Kir-P), Model A-C2 (Adonis-C2), Model J-P1 (Model J).

This occurs in the following conditions:

- Macintosh with PowerPC G3 or G4 processor

- Network: Apple Talk (Ether Talk)

- Network Speed: 100Mbps (100Base fixed)

No.:

RB003008

CAUSE

When the data is transferred at 100Mbps, depending on network conditions, the controller
ASIC is not able to receive all data packets and a retry procedure occurs. As a result, print
jobs from a Macintosh take a long time to print out.

SOLUTION

Please also see the flow chart on the last page.

1) Check what type of hub the customer is using.
If the customer is using a dual speed (10M/100Mbps) hub, go to step 2.
If the customer is using a 100Base fixed (100Mbps only) hub, go to step 3.

2) For the customer using a dual speed hub:
Set the network (ethernet) speed of the machine to 10Mbps.
The default setting of the machine is “Auto.” This setting can be changed in the
“Network Setup” in the user mode “Host Interface” (“Interface Settings” in the “System
Settings” for the Model A-C2).

End of procedure for the customer using a dual speed hub.

echnical Bulletin

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PAGE: 2/3

Model:

K-P1, A-C2, J-P1

Date:

03-Jul-01

No.:

3) For the customer using a 100Base fixed hub:

Temporary solutions:

Perform both of the following:

a) Set the network (ethernet) speed of the machine to 10Mbps.

The default setting of the machine is “Auto.” This setting can be changed in the
“Network Setup” in the user mode “Host Interface” (“Interface Settings” in the
“System Settings” for the Model A-C2).

b) Install a dual speed hub between the 100Base fixed hub and the machine.

End of procedure for the customer using a 100Base fixed hub.

10Mbps

100Mbps

Network

100Base fixed hub Dual speed hub

RB003008

Originally used by

the customer.

Install a dual

speed hub

Set the network

speed to 10Mbps

Note:

There is almost no effect on actual print time when the machine’s network speed setting
is changed from 100Mbps to 10Mbps.

Permanent Countermeasure:

An interface board (GW-MAC) and a DIMM which contains firmware to drive the board
will be supplied for attachment to the controller board. With these parts, the machine will
work without installing a dual speed hub.

Detailed information on the interface board (GW-MAC) will be announced separately in
mid July.