Brother MFC845CW Manual De Servicio página 119

Problem
(7) Ink blotch
(8) Misaligned printing
boarders
(9) Random Missing Dots
Printer
•
Perform the purging operation (Function code 76) several times
to remove dust or air bubbles from its nozzles. If the problem
persists, replace the head/carriage unit. (Refer to
Section 9.1.4.21.)
•
Check ink cartridges. If any of them are empty of ink or
the viscosity of the ink has increased, replace.
•
Check the head property information (See
9.1.4.17.)
•
Verifiy that the main drain tube is not bent.
•
Replace the head/carrige unit
•
Replace the Main PCB
•
Replace the power supply PCB
•
Replace the maintenance unit
Printer
•
Check the vertical printing lines with Function Code 65
in maintenance mode (See
•
Check the head/carriage unit
•
Check to see whether the CR encoder strip has stains or is scratched
(If the CR encoder strip is not correctly hooked up, correct this)
•
Correct the position error on the head/carriage unit.
(See Chapter 7, Sectión 7.2, [ 4 ].)
•
Check the head/carriage unit height adjustment mechanism.
(See Chapter 3, Section 3.2.2.3.)
•
If the "Head-platen space offset" is activated in AMS 02
safe switch mode (Function Code 88), align the vertical printing lines
(Function Code 65). (See
Printer
•
Perform the purging operation (Function Code 76) several times
to remove dust or air bubbles (See
•
Check ink cartridges. If any of them are empty of ink, replace.
•
Check the Main PCB head flat cable connection (if any of
these cables is worn or damaged, replace)
•
Replace Main PCB unit
•
Clean the covers and head cleaners on the maintenance unit with a
Rubycel stick. For cleaning procedures See
"CLEANING THE MAINTENANCE UNIT"
•
Replace mantenance unit
4-32
Action to be taken
Chapter 9, Section
Chapter 9, Sectin 9.1.4.15.)
Chapter 9, Sections 9.1.4. 25 y 9.1.4.15.)
Chapter 9, Section 9.1.4.21.)
Chapter 8, Section 8.1
Chapter 9,
Confidencial