Diagnostic aids
3-13
Hardware Tests
Panel Test
This test verifies the operator panel LCD function.
To run the Panel Test:
1.
Select
Hardware Tests
from Diag Menu, and press
Select
(
).
2.
Select
Panel Test
, and press
Select
(
).
The Panel Test continually executes.
press
Stop
(
) to cancel the test.
Button Test
This test verifies the operator panel button function.
To run the Button Test:
1.
Select
Hardware Tests
from Diag Menu, and press
Select
(
).
2.
Select
Button Test
, and press
Select
(
).
press count: 0
appears.
press each operator panel button, and watch to see if the number of press counts increases by one for
each press.
Note:
If you press
Stop
(
), you end the test.
press
Stop
(
) to cancel the test.
DRAM Test
This test checks the validity of DRAM, both standard and optional. The test writes patterns of data to DRAM to
verify that each bit in memory can be set and read correctly.
To run the DRAM Test:
1.
Select
Hardware Tests
in Diag Menu, and press
Select
(
).
2.
Select
DRAM Test
, and press
Select
(
).
a.
The printer displays:
b.
The printer initiates a POR of the printer, and the following screen is displayed:
c.
After the POR, the printer begins testing the memory.
P:###### represents the number of times the memory test has passed and finished successfully.
Initially, 000000 displays with the maximum pass count being 99,999.
F:##### represents the number of times the memory test has failed and finished with errors. Initially,
0000 displays with the maximum fail count being 99,999.
3.
Once all the memory is tested, the test stops.
DRAM Test Testing…
Resetting the
Printer
DRAM Test
128M
P:###### F:#####
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...