Online Function Problems - Xerox 7142 Service Manual

9 Troubleshooting
9.3.6

Online Function Problems

Table 9-14 Symptoms, Check Items, and Actions for Online Function Problems
No. Event/symptom
1
USB interface cannot
establish communication.
2 Scaling does not work
correctly.
Check item
1. Does computer in use
support USB?
2. Does the same error
occur even if you use
another USB port on
the computer?
3. Are you using USB
hub?
4. Attempt
communication with
PC on hand.
5. Does the same error
occur even if interface
cable is changed?
6. Plotter driver may be
defective.
7. Program ROM may be
defective.
8. Main board assembly
may be defective.
1. Plotter driver may be
defective.
9-72
RJ-901C/RJ-900C Maintenance Manual
Action
Windows95 does not support
USB officially. If you use
Windows95, use computer
with Windows98 or higher
OS installed.
Use another USB port on the
computer.
• Cascade connection
using USB hub is
available up to 5 stages.
• If the plotter operates
normally without using
USB hub, replace USB
hub.
• Instruct users to use USB
hubs compliant with
USB2.0 Hi-Speed
standard.
Replace USB cable.
Communication error may
be caused by an open circuit
in interface cable or too long
cable length. Instruct users to
use cables compliant with
USB2.0 Hi-Speed standard.
Update plotter driver.
Update firmware.
Replace main board
assembly.
Update plotter driver.
Reference
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-
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"7.3.5
Firmware
Installation"
p.7-15
"4.3.3
Replacing
Main Board
Assembly"
p.4-21
Operation
Manual