2-38
Service Manual
5025-2xx, 4xx
Operator panel display is dim and unchanging
Operator panel USB cable service check
Step
Questions / actions
Yes
No
1
Turn the printer off, and remove the rear
shield. See
“Top cover assembly removal”
on page 4-13
.
Turn the printer on, and verify the following
values at JOPP1 on the controller board:
Are all these values approximately correct?
Go to step 2.
Replace the controller
board. See
“Controller
board removal” on
page 4-20
.
2
Check for continuity in the operator panel
cable connector.
Note:
Remove the three screws holding the
operator panel, and place it facedown on top of
the printer. The cable connector pins will be
exposed and easier to contact.
Do all the conductors indicate continuity?
Replace the operator panel.
See
“Operator panel logo
plate” on page 4-9
.
Replace the front cover
assembly. See
“Front
cover assembly removal”
on page 4-2
.
Step
Questions / actions
Yes
No
1
Check the operator panel USB cable for
continuity.
Is there continuity?
Replace the controller
board. See
“Controller
board removal” on
page 4-20
.
Replace the USB port
connector.
“USB port
connector removal” on
page 4-76
JOPP1
Pin
Value
1
0 V dc
2
+5 V dc
3
0 V dc
4
Ground
5
+5 V dc
6
+3.3 V dc
7
Ground
Содержание C 540n
Страница 8: ...viii Service Manual 5025 2xx 4xx...
Страница 13: ...Notices and safety information xiii 10 2 2009 5025 2xx 4xx...
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Страница 196: ...4 54 Service Manual 5025 2xx 4xx 17 Swing the left lower frame away from the printer and remove...
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Страница 225: ...Connector locations 5 1 5025 2xx 4xx 5 Connector locations Locations...
Страница 227: ...Connector locations 5 3 5025 2xx 4xx Connectors...
Страница 236: ...5 12 Service Manual 5025 2xx 4xx High voltage power supply HVPS diagram...
Страница 237: ...Connector locations 5 13 5025 2xx 4xx Low voltage power supply LVPS diagram...
Страница 238: ...5 14 Service Manual 5025 2xx 4xx Toner meter cycle TMC card Wireless network card...
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Страница 242: ...7 2 Service Manual 5025 2xx 4xx Assembly 1 Covers 4 3 1 10 6 5 8 7 2 9...
Страница 244: ...7 4 Service Manual 5025 2xx 4xx Assembly 2 Frames 5 2 4 7 6 1 3 8 9 3 10...
Страница 246: ...7 6 Service Manual 5025 2xx 4xx Assembly 3 Electronics 2 4 6A 5 1 6B 7 8 6C 3 9...
Страница 248: ...7 8 Service Manual 5025 2xx 4xx Assembly 4 Cables...
Страница 250: ...7 10 Service Manual 5025 2xx 4xx Assembly 5 Media drawers and trays 1 3 2 4 2...
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