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Service Manual
Operator panel service check
Warning:
Replace one of the following components, and perform a POR before replacing a second
component. Never replace both of the components without performing a POR after installing each
one, or the printer will be rendered inoperable:
•
Operator panel assembly
•
Controller board
Warning:
Never install and remove components listed above as a method of troubleshooting components.
Once a component has been installed in a printer, and the printer is powered on, it cannot be
used in another printer. It must be returned to the manufacturer.
One or more operator panel buttons fail
Operator panel display blank, five
beeps
Service tip: The printer has detected a problem with the controller board, the operator panel assembly cable
(part of the front cover assembly), or the operator panel assembly if POST does not complete. The printer emits
five
beeps
, and sticks in a continuous pattern until the printer is turned off.
Step
Questions / actions
Yes
No
1
Run the Button Test. See
in Diagnostics Menu.
Did any of the buttons fail the test?
Replace the operator panel
assembly. See
.
Go to step 2.
2
Turn the printer off, and remove the rear
shield.
“Rear shield removal” on page 4-7
.
Disconnect the operator panel assembly cable
at JOPP1 on the controller board. Turn on the
printer, and verify the following voltages:
Are the voltage values approximately correct?
Replace the operator panel.
See
If the problem is not
resolved, replace the
operator panel cable. See
“Op panel cable” on
page 4-101
Replace the controller
board. See
Step
Questions / actions
Yes
No
1
Is the operator panel assembly cable properly
installed at controller board JOPP1 and at the
operator panel assembly?
Go to step 2.
Reinstall the cable.
JOPP1
Pin
Voltage
2
+5 V dc
4
Ground
5
+5 V dc
6
+3.3 V dc
7
Ground
Y112730-2
Summary of Contents for d-Color MF920
Page 1: ...SERVICE MANUAL Copiatrici Copiers d Color MF920 d Color MF923 Code Y112730 2...
Page 10: ...x Service Manual Y112730 2...
Page 15: ...Notices and safety information xv Y112730 2...
Page 16: ...xvi Service Manual Y112730 2...
Page 18: ...xviii Service Manual Y112730 2...
Page 22: ...xxii Service Manual Y112730 2...
Page 124: ...2 80 Service Manual Y112730 2...
Page 198: ...3 74 Service Manual Y112730 2...
Page 302: ...4 104 Service Manual Y112730 2...
Page 305: ...Locations 5 3 Interior view Y112730 2...
Page 306: ...5 4 Service Manual Printer boards Controller Board Y112730 2...
Page 317: ...Locations 5 15 HVPS Y112730 2...
Page 319: ...Locations 5 17 LVPS Y112730 2...
Page 324: ...6 2 Service Manual Y112730 2...
Page 331: ...Index I 7 Y112730 2...
Page 332: ...UPDATINGSTATUS DATE UPDATEDPAGES PAGES CODE 09 2010 1ST EDITION 332 Y112730 2...