How To Ensure Of Quality On Re-Assembled Product - Epson Stylus CX3700 Service Manual

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850
4.2 Caution regarding Assembling/Disassembling
of the Printer Mechanism, and How to Ensure
of Quality on Re-assembled Product
On current low end models, we basically forbade to remove Housing Lower from
Printer Mechanism in your repair. This is because there is a possibility of Main Frame
deformation when a part (such as Ink System Unit) is removed from Printer
Mechanism without Housing Lower.
For this reason, we recommend that a new Printer Mechanism be replaced along with
the Housing Lower when a part cannot be replaced without removing the Printer
Mechanism.
On these models, you have to remove Housing Lower from Printer Mechanism when
replacing [Waste Ink Pads] with new one.
Therefore, we clarify caution regarding assembling/disassembling of the Printer
Mechanism without Housing Lower, and how to ensure of quality on repaired
production this section.
[Caution regarding assembling/disassembling of the Printer Mechanism]
1) Main Frame
(a) Control of assembled standard position.
[Reason]
• The assembled accuracy of each part composed of Printer Mechanism is
based on Housing Lower.
[Service treatment]
• Confirm that there is no gap between Main Frame and Housing Lower.
[Reference]
• To ensure the assembled accuracy, you have to control the assembled
standard position of main frame against X/Y/Z-axis direction.
[X-axis direction]
• Make sure that main frame is correctly placed on the groove of Housing
Lower.
• Make sure that there is no gap between Main Frame and Housing Lower.
[Y-axis direction]
• Make sure that main frame is correctly placed on the groove of Housing
Lower.
•
Make sure that there is no gap between Main Frame and Housing Lower.
DISASSEMBLY/ASSEMBLY Caution regarding Assembling/Disassembling of the Printer Mechanism, and How to Ensure of Quality on Re-assembled Product
[Z-axis direction]
• Align dowel of Housing Lower with positioning hole of Main Frame and
ensure there is no gap.
(b) How to assemble of ASF Unit/Main Board Unit/Paper Guide Upper Unit
[Reason]
• There is a possibility that main frame deformation is caused extra force in
assembling. As the result, printing failure/operation failure occurs.
[Service treatment]
• Hold the opposite side by hand while you are installing the above parts.
2) CR Guide Frame
(a) Control of vertical level
[Reason]
• There is a possibility that printing failure occurs by CR Guide Frame
deformation.
[Service treatment]
• Handle Front Frame in assembling/disassembling carefully.
3) Carriage Unit
(a) Handling of Carriage Unit
[Reason]
• If Carriage Unit is damaged in assembling/disassembling of your repair,
there is a possibility that vital problem occur in user's further operation.
[Service treatment]
• Handle Carriage Unit in assembling/disassembling carefully.

[How to ensure of quality on re-assembled product]

We judge that the quality of re-assembled product is ensured if there is no problem
about the print result by adjustment program.
Revision A
95