Preventive Maintenance - Epson 2070 - LQ B/W Dot-matrix Printer Service Manual

LQ-2070 Service Manual

6.1 PREVENTIVE MAINTENANCE

Preventive maintenance includes regular cleaning of the exterior case using denatured alcohol, as well as
occasional vacuuming of the mechanism interior to remove dust and paper debris. After cleaning the unit,
check that it is adequately lubricated, as described in Section 6.2, below. Before returning the printer to the
customer, inspect springs, paper-feed rollers, and basic operation.
Disconnect the printer from the external AC power source before performing maintenance. Do
not use thinner, trichloroethylene, or ketone-based solvents on the plastic components of the
printer.
6.2 APPLYING LUBRICATION
EPSON recommends the printer be lubricated at the points illustrated to the following pages. Table 6-2 lists
each point along with its recommended lubricant. The recommended lubricants are EPSON G-26 and O-2,
which have been tested extensively and found to comply with the needs of this printer. (Table 6-1 provides
details about these lubricants.) Before applying a lubricant, be sure the surface to be lubricated is clean. Do
not apply too much lubricant, as this may damage nearby parts.
Type
Grease
Oil
Ref. No.
1 Cam surface on the 34.5 mm spur gear
The platen gap adjustment slots on the right
2 frame.
The shaft end of drive roller assembly and the
3
cutout section on the left frame.
4 Oil pad
RD planetary shaft and planetary lever leaf
5
spring
RD housing
6-1 Side of shafts: 3 points
6-2 Inside hole:
RD Assembly
7
Gear teeth:
Contact area of the paper guide and the
8
release shaft
Note: Lubrication must be applied during the reassembly process.
For lublication points, refer to the figure on the next page.
Rev. A
CAUTION
Table 6-1. Lubrication
Name Quantity
G-26 40 gm
O-2 40 cc
Table 6-2. Lubrication Points
Lubrication Points
1 point
5 points
Availability Part No.
EPSON B702600001
EPSON B703700001
Quantity
2 mm width, halfway
2 mm width, from the
top slot to the 3rd from
the bottom.
About 1/2 the size of a
grain of rice
half of the pad
About 1/2 the size of a
grain of rice.
About 1/2 the size of a
grain of rice
About the whole the
size of a grain of rice.
About 1/2 the size of a
grain of rice
About whole the size
of a grain of rice.
Maintenance
Lubricant
G-26
G-26
G-26
O-2
G-26
G-26
G-26
G-26
6-1