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Model:
General RTB
Subject:
GW Products - Hardware Ethernet Problem
From:
Technical Services Sec. Service Planning Dept.
Classification:
Troubleshooting
Mechanical
Paper path
Other (
SYMPTOM
When the main switch is turned on, the error message "Hardware Ethernet Problem" may
be displayed under the following condition on the GW-based products.
Conditions:
• Network speed on the hub has been set to 100Mbps fixed with full duplex, and
• Length of network cable is too long (60 m or more) or the cable quality is not good
enough
CAUSE
When the main switch is turned on, the machine performs a loop-back test. If the cable
length is too long or its quality is not good enough, the damping factor for the data
transmission becomes worse, and the machine incorrectly detects an error during this test.
This happens only when the network speed is set to 100Mbps fixed with full duplex. The
PHY chip used on the controller board causes this.
SOLUTION
- Temporary Solution -
• Set the network speed on the hub to Auto-sensing,
• Use a shorter cable or a cable with a lower damping factor, or
• Disconnect the network cable and power on the printer; then, set the cable after the
printer comes to the ready condition.
- Permanent Solution -
The controller firmware will be modified to avoid the incorrect detection of this error
message. The schedule of firmware modification is as follows.
Product Type
Product
Fax
Kaiser 3
Printer
Model-K P1
Model-K P2
Model-J P1b
Model-J CF
Model-U P1e
Model-A P3
MFP
Model-R C2
Model-A C2
Model-M C1
Model-U C1
T
B
echnical
Part information
Electrical
Transmit/receive
)
Firmware Modification
Cut-in Schedule
at next modification
'03 January production run
'03 March production run
at next modification run
'03 February production run
ulletin
Date:
27-Dec-02
Prepared by:
T. Itoh
Action required
Service manual revision
Retrofit information
NOTE:
Firmware will be
posted in the usual
manner when it is
released.
PAGE: 1/1
No.:
RGene012