And How To Ensure Of Quality On Re-Assembled Product - Epson Stylus C87 Service Manual

EPSON Stylus C87/C88/D88
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've basically forbidden 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) is removed from Printer mechanism
without Housing, Lower.
For this reason, if you want to replace Ink system/PF motor, we recommend to replace
with new Printer mechanism with Housing, Lower. On these models, you have to
remove Housing, Lower from printer mechanism when replacing Waste Ink Pad with a
new one.
Therefore, we clarify caution regarding assembling/disassembling of the printer
mechanism without Housing, Lower, and how to ensure of quality on repaired products
in 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.
DISASSEMBLY/ASSEMBLY Caution regarding Assembling/Disassembling of the Printer Mechanism, and How to Ensure of Quality on Re-assembled
[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 cut-out portion of main frame is correctly placed on the square
protrusion of Housing, Lower.
[Z-axis direction]
- Make sure that there is no gap between main frame and Housing, Lower.
- Make sure that the left side of Printer mechanism is correctly fixed by two
tabs.
(b) Control of vertical level of guide rail (Guide rail means the portion latched by
hooks of IC holder & Print head assy.)
[Reason]
There is a possibility that printing failure/operation failure occurs by guide
rail deformation.
[Service treatment]
- Do not remove [Mounting Plate, M/B] from Printer mechanism.
- Hold up the specified position of main frame to avoid the deformation.
(c) How to assemble of ASF unit/Circuit board/Paper guide upper
[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 with hand while you are installing the above parts.
Revision A