EPSON Stylus Color 900

Revision C

Table 3-10. Remedies for No I/C and Ink Out Errors (continued)

Table 3-11. Remedies for No I/C and Ink Out Errors (continued)

Step

Check Point

Actions

 

 

 

3

Is the micro switch fixed

If the micro switch is not properly attached, the

 

improperly?

actuators possibly fail to touch the micro switch.

 

Is the connector (green)

Therefore, check that the micro switch is

 

disconnected?

securely attached to the carriage by the hooks.

C o n n e c t o r

S w it c h

M ic r o

 

 

H o o k s

 

 

 

4

Is the connector (green,

Remove the printhead and check if the connector

 

3-pin) disconnected form

(green, 3-pin) is disconnected from the small

 

the small board which is

board at the bottom of the printhead.

 

directly attached to the

Note: The green 4-pin is irrelevant as it is for the

 

head surface side?

encoder.

 

 

 

5

Is the micro switch

1. Keeping the left micro switch pressed down,

 

defective?

place the probes of the tester to the middle

 

 

and left pins to check for electrical continuity.

2.Keeping the right micro switch pressed down, place the probes of the tester to the middle and right pins to check for electrical continuity.

S t e p 1 S t e p 2

P u s h 1 P u s h 2

Step

Check Point

Actions

 

 

 

6

Is data in the EEPROM

If the address for the ink consumption information

 

destroyed?

in the EEPROM is garbled and the printer shows

 

 

the Ink Out (Ink End) error constantly, the printer

 

 

sets the interface signal “BUSY” to High and stops

 

 

communication with any other peripheral devices.

e s

 

Therefore, it is effective to replace the I/C with a

 

new one to forcibly overwrite the address with 00H.

 

 

 

 

 

7

Is the abnormal

Since the Stylus Color 900 drives a large number

 

temperature detection

of PZT with a high drive frequency, if the printhead

 

circuit working?

is driven without any ink filled in it, the printhead

 

 

abnormally heats up and may be damaged as the

 

 

result. Therefore, this printer monitors and controls

 

 

the temperature around the printhead more strictly

 

 

than any other printers do. In case the printer

 

 

detects abnormal rise in head temperature during

 

 

printing, it generates the I/C replacement

 

 

command after the sequence described below.

 

 

1. Detects an abnormal temperature during

 

 

printing.

 

 

2. Stops printing and begins a head cleaning. (This

 

 

operation solves the nozzle clogging problem in

 

 

most cases.)

 

 

3. Resumes printing.

 

 

4. If detects an abnormal rise in the head

 

 

temperature again, sets a flag and generates

 

 

the I/C replacement command. (The Ink LED

 

 

comes on.)

 

 

The printer mostly enters this sequence under the

 

 

following two conditions:

 

 

• Ink around the nozzles is severely viscous. (due

 

 

to removal and reinstallation of the I/C)

 

 

• Ink is leaking from the printhead because of a

 

 

large impact.

 

 

The temperature in the printhead actually rises

 

 

abnormally when half the nozzles in any nozzle

 

 

row are clogged, or 48 nozzles in any 96-nozzle

 

 

row are clogged.

 

 

 

Troubleshooting

Overview

86

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Epson SEIJ98006 manual Temperature around the printhead more strictly
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