Brother DCP6690CW Service Manual page 156

Problem
(7) Ink splash
(8) Print edges not aligned
Printer
• For duplex print models: Change the special duplex copy settings using
the steps below.
1) Press Duplex Copy on the machine's panel.
2) Press On to turn on the duplex setting.
3) Press Advanced.
4) Press DX1 or DX2.
(DX1 helps avoid paper jams when copying by allowing more time
for the ink to dry. DX2 allows more time for the ink to dry while also
using less ink.)
• Perform the purge operation (Function code 76) several times to
remove dust or air bubbles from its nozzles. (Refer to
Section 9.4.24.)
• Check the ink cartridges. Any of them has run out of ink or the ink
viscosity has been increased, so replace it.
• Check the head property data (Refer to
• Check that the main drain tube is not bent.
• Replace the head/carriage unit.
• Replace the main PCB.
• Replace the power supply PCB.
• Replace the maintenance unit.
Printer
• For duplex print models: Change the special duplex copy settings using
the steps below.
1) Press Duplex Copy on the machine's panel.
2) Press On to turn on the duplex setting.
3) Press Advanced.
4) Press DX1 or DX2.
(DX1 helps avoid paper jams when copying by allowing more time
for the ink to dry. DX2 allows more time for the ink to dry while also
using less ink.)
• Check the alignment of vertical print lines with Function code 65 in the
maintenance mode. (Refer to
• Perform the print head skew compensation with the head skew adjuster
knob. Refer to Chapter 7, Section 7.2, [ 4
• Check the head/carriage unit.
• Check the CR encoder strip for stains or scratches. (If the CR encoder
strip is not hooked properly, correct it.)
• Correct the positioning error of the head/carriage unit. (Refer to
Chapter 7, Section 7.2, [ 4
• Check the height adjustment mechanism of the head/carriage unit
(Refer to Chapter 3, Section
• If the "head-platen gap offset" is enabled with assurance mode switch
AMS 02 (Function code 88), align the vertical print lines (Function
code 65). (Refer to Chapter 9, Section 9.4.29 and
4-44
Action to be taken
Chapter 9, Section
Chapter 9, Section
].
].)
3.2.2.3.)
Chapter 9,
9.4.20.)
9.4.18.)
9.4.18.)
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