Epson 4001968 Manual

A SERVICE OF

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SNLUS

800 Service

Manual

Troubleshooting

Table 5-7. Repair of Printer Mechanism (Continued)

Symptom

Condition

Cause

Checkpoint

Solution

The head cable is

Check the head cable for

Replace the

disconnected.

disconnection.

cable.,

The carriage

Printing is not

moves, but no

The

printhead

is

Replace the

printhead

to

Replace the

performed.

printing is

defective.

see if the

printhead

operates normally.

printhead.

performed.

Ink absorption is

See “Ink is not absorbed”

poor.

on the previous page.

Printhead

surface

Perform the cleaning

Clean.

is not clean.

operation.

A particular dot

The head cable is Check the head cable for

Replace the

is not printed.

disconnection. disconnected.

cable.

The

printhead

is

Replace the

printhead.

Replace the

defeotive.

printhead.

Printhead

surface

Check front of the

is not clean.

Clean.

printhead.

The expiration of

Check the ink cartridge for

Replace the

the ink

oartridge.

expiration.

ink cartridge.

Cheek whether the cable

Plug the

oable

Insufficient

is properly plugged into

into the

A dot is not

contact of the

the connector.

conneotor

printed

head cable.

properly.

Abnormal

occasionally.

Cheek the cleanliness.

Clean.

printing.

The

printhead

is

Replace the

printhead

to

defective.

see if this causes printing

Replace.

to be performed normally.

Ink is

lmorly

Check whether the used

See “Ink is not

absorbed.

ink goes through the used

ink tube.

absorbed”.

Printhead

The paper gap is

characters are

Check the paper gap.

not adjusted.

Adjust the gap.

not aligned.

The intervals

between the

The timing bett is

Cheek that the timing belt

Set the timing

characters are

defective.

is properly inserted into

the bottom of carriage.

belt properly.

irregular.

Vertical line is

Bidirectional

Adjust the check it with

Adjust the

alignment is not

bi-directional

alignment

not aligned.

bi-directional

adjusted.

program.

alignment.

Foreign substance

Visually check the paper

Remove any

are lodged in the

foreign

paper path.

path.

substance.

Paper is not fed

Paper is not fed.

Paper feeding

Replace

normally.

gears are

Visually check the gears.

defective

defective.

gears.

The paper feed

Measure the coil

Replace the

motor is defective.

resistance of the

PF.

motor.

PF motor.

Rev.

A

5-13