Brother DCP-8070D Service Manual page 177

■ Pickup function of paper tray does not work.
Step
1 Link lever catching on some position Re-assemble the link lever.
Pickup roller holder ASSY catching
2
on some position
3 Roller holder ASSY failure
4 Main motor failure
5 Pressure plate drive cam failure
6 Main PCB ASSY failure
■ The new toner is not detected.
Step
New toner actuator not operating
1
smoothly or catching.
2 Main PCB failure
Toner sensor (TE/NEW) failure
3
■ Printing from Macintosh applications fails.
<User Check>
- Check that the printer driver which, is supplied with the product, is installed in Library/
Printers, and that the print queue is created.
- Check the connecting end on the printer browser. It must be matched with the
connecting end which is actually connected.
Step Possible cause
Failure inside the
machine
1
Breakage of
2 main PCB
■ USB direct printing does not work.
Step
1 USB host PCB failure
2 Main PCB failure
Cause
Cause
Check
Does the machine print
test pattern?
(Check it following the
procedure described in
"4.5 Test Pattern 1
(Function code 09)" in
Chapter 7.)
Does the machine make
a print using a correct
PC and a USB cable?
Cause
3-86
Remedy
Re-assemble the pickup roller holder
ASSY catching on some position.
Replace the roller holder ASSY.
Replace the main motor.
Replace the frame L.
Replace the main PCB ASSY.
Remedy
Make sure correct movement of the new
toner actuator of the appropriate color.
Replace the main PCB ASSY.
Replace the relay front PCB ASSY (TE/
NEW) of the appropriate color.
Result
Identify the error type, and
then refer to the specified
section of this chapter.
No
Replace the main PCB
No ASSY.
Remedy
Replace the USB host PCB.
Replace the main PCB ASSY.
Remedy
Confidential