Service manual

EPSON Stylus Photo R340/350 Revision A
Troubleshooting Troubleshooting 17
• Occurrence
Timing:
At power-on
• CR Position:
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The Carriage Unit hits against the Upper
Paper Guide which has come off the
Main Frame at power-on.
Upper Paper Guide 1. Check if the Upper Paper Guide has not come off the
Main Frame.
1. Install the Upper Paper Guide correctly.
The Carriage Unit hits against the right
side of the Main Frame at power-on.
CR Scale 1. Check if the CR Scale gets dirt. 1. Wipe off the dirt completely or replace the
CR Scale with a new one if it is stained badly.
2. Check if the CR Scale is damaged. 2. Replace the CR Scale with a new one.
3. Check if the CR Scale has come off or it properly runs
through the slit of the CR Encoder Sensor.
3. Install the CR Scale correctly.
* If the above does not solve the problem, try
the following actions one by one in the
order given.
1. Replace the Main Board Assy. with a new
one.
2. Replace the CR Encoder Sensor with a
new one.
Table 1-6. Troubleshooting of Fatal Errors based on Observed Symptom (continued)
Occurrence
Timing
CR Position
Symptoms Failed Part Check Point Remedies
Upper Paper Guide
CR Scale
CR Encoder
Sensor
Carriage Unit