LQ-300 Service Manual
Maintenance
6.1 PREVENTIVE MAINTENANCE
Preventive maintenance includes regular cleaning of the case exterior (using denatured alcohol), as
well as occasional vacuuming of the mechanism’s 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
returnm
. g the printer to the customer, inspect the springs, paper-feed rollers, and basic operation.
Disconnect the printerj?om the external AC power source before performing maintenance.
Do
not use thinner,
trkhloroethykne,
or ketone-based solvents on the plastic components
of the printer.
6.2
APPLYING LUBRICATION
EPSON recommends
that
the printer be lubricated at the points
dlustrated
in Figure 6-1. Table 6-2
lists each point along with its recommended lubricant. The recommended lubricants are EPSON
G-20, G26 and O-2,
all
of 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 that the surface to be lubricated is clean. Do not apply too much lubricant, as this may
damage nearby parts.
Table 6-1. Lubrication
Type
Name
Quantity Availability
Part No.
G-26
Grease
40 gm
EPSON
B702600001
G-20
40 gm
EPSON
B702ml
Oil
o-2
40 co
EPSON
B703700001
Table 6-2. Lubrication Points
Ref. No.
Lubrication Points
Lubricant
(1)
The hooks that attach the CR motor to the base frame.
G-26
(2) The shafts for the gear train on the left frame (5
plaoes).
G-26
(3) The shafts for the gear train on the right frame (2 places).
G-26
(4)
The contact surface of the disengage lever and tractor
reduotion
gear.
G-26
(5)
The oil pad in the carriage assembly. o-2
(6)
The teeth of 34 mm gear.
G-26
(7)
The point at which the platen grounding wire mntacts the platen shaft.
G-20
(8)
The portions of the carriage assembly that
oontact
the base frame.
G-26
(9)
The contact point of the right tractor frame and
TR shaft. G-26
(lo)
The oontact point of the left tractor frame and
TR shaft. G-26
(11)
The contact point of the drive pulley shaft and drive pulley.
G-26
Note:
Lubrication must be applied during the reassembly process.
Rev.A
6-1
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