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

LQ-2070 Service Manual
1. Abnormal CR Operation
START
When the printer
was powerd on, dose the
CR motor rotate ?
Y E S
Dose
the CR motor
stop during or after
initilization ?
Y E S
Whe n
you move the
CR manually wih the
power off, dose it
move freely ?
Y E S
Replace the oil pad mounted on
the CR assembly. Clean the CR
shaft, and lubricate the oil pad
and the surface of the CRshaft.
N O
Is CN4
connected
correctly ?
Y E S
N O
N O
Dose the
HP sensor work
correctly ? See
Table 5-2.
Y E S
N O
Rev.A
N O
N O
Y E S
N O
Replace the
C186 MAIN
Board.
Is the
N O
platen gap
Adjust the Platen Gap properly
adjusted
Refer the Chapter 4.
properly ?
Y E S
N O
E N D
Connect the CN4
correctly.
Is the
Y E S
problem
corrected?
EN D
Replace the HP
Sensor to new one.
Y E S
Is the
N O problem
corrected ?
Figure 5-2 Flowchart1
N O
Is the Connector
CN 11 connected
correctly ?
N O
Check the resistance of
the motor coils.
See Table 5-3.
N O
Is it
OK?
Replace the
CR motor
E N D
Y E S
Is the
problem corrected ?
Is the
resistance for
Y E S
the CR motor correct ?
See table 5-3.
Y E S
Replace the C186
MAIN board.

Troubleshooting

Connect the
CN 11
correctly
Is the trouble
removed ?
Y E S
E N D
N O
Replace the
CR motor.
N O
Is the
problem
corrected ?
Y E S
EN D
5-5