Troubleshooting With Led Error Indications - Epson 680Pro - LQ B/W Dot-matrix Printer Service Manual

EPSON Stylus COLOR 680/777/777i

3.2 Troubleshooting with LED Error Indications

This section describes how to troubleshoot the problem when the printer indicates an
error at power on and can not print. The Stylus COLOR 680/777/777i can detect the
following six errors and seven status, and indicates them with the LEDs, as shows
below.
Table 3-3. Error Indicator of Operation Panel
Printer Status
Power ON condition
Ink sequence
Ink Cartridge change mode
Data processing
Paper Out
Paper jam condition
Ink end (Black)
Ink level low (Black)
Ink end (Color)
Ink level low (Color)
Ink end (Black and Color)
No Ink Cartridge (Black and Color)
Maintenance request
(Ink Overflow Counter error)
Fatal error
" - " : Indicator status don't change.
" A -> B " : A is a indicator condition when carriage is on Home Position.
B is a indicator condition in Ink exchange sequence.
Troubleshooting
Indicators
Power Error
On -
Blink -
Blink -
Blink -
- On
- On
- On -> Blink
- Blink
- On -> Blink2
- Blink
- Blink -> Blink
- On
Alt Blink Alt Blink
Off On
Troubleshooting with LED Error Indications
See the following tables which show the error conditions and corresponding
possible causes:
Table 3-4. Error Condition and possible cause
Symptom
Paper out error indication
Priority
(Paper is not loaded
correctly)
10
6
5
9
4
Paper jam error indication
3
8
8
8
No I/C or Ink Out error
indication
8
8
Multiple papers are always
loaded
7
Paper is always loaded
2
without any print job
1
Fatal error indication
Possible Cause
• The friction of the LD roller is lowered due
to the paper dust.
• The clutch mechanism is broken.
• Tension spring 0.143 come off in the clutch
mechanism.
• Compression spring 0.98 comes off.
• Tip of Change lever has any damage.
• PF motor is broken.
• Star wheel assembly is not assembled on
the Paper eject frame.
• The Spur gear 15 is not assembled
correctly.
• The paper guide front is not assembled
correctly or has any damage.
• The PE detection lever dose not move
smoothly.
•
•
•
•
• The paper return plate dose not work
correctly.
• The Change lever is broken in the Clutch
mechanism.
• HP sensor lever or PE sensor lever dose not
move smoothly.
• HP/PE sensor is defective.
• CR motor is defective.
• PF motor is defective.
• Main board is defective.
• Printer Housing dose not secured with
screw on -the printer mechanism.
Revision B
Check table
Table 3-5
Table 3-6
Table 3-7
Table 3-8
Table 3-9
Table 3-10
Table 3-12
Table 3-13
Table 3-14
Table 3-15
Table 3-16
51