Sharp MX 3501N - Color Laser - Copier, Service Manual

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MX3500N SELF DIAG AND TROUBLE CODE 8 – 11
E7-09 Local memory combination error
* When the following combination (E7-09) where operation is not
performed properly is used. Local memory (slot 3, slot 4) combi-
nation
E7-10 Shading trouble (Black correction)
E7-11 Shading trouble (White correction)
E7-14 SCAN-ASIC trouble
E7-20 LSU BD detection trouble
E7-21 LSU LD deterioration trouble
Trouble content Local memory slot combination error
Section MFP
Case 1 Cause DIMM of other than 256MB is installed to the default
slot.
Check
and
remedy Check the combination of installed DIMM.
Case 2 Cause DIMM of other than 256MB is installed to the
expansion slot.
Check
and
remedy Check the combination of installed DIMM.
No.
Local memory Operation guarantee
When turning
on the power
Slot 4
(Inside)
Slot 3
(Outside)
Hard Soft
1 – –
✕ ✕
E7-09
2 256MB – { { Normal operation
3 512MB – {
✕
E7-09
4 256MB 256MB {
✕
E7-09
5 512MB 256MB {
✕
E7-09
6 256MB 512MB { { Normal operation
7 512MB 512MB {
✕
E7-09
8 – 256MB
✕ ✕
E7-09
9 – 512MB ✕ ✕ E7-09
Trouble content CCD black scan level abnormality when the copy lamp
is turned off.
Section Scanner
Case 1 Cause Installation error of the CCD unit flat cable
Check
and
remedy Check the installing state of the flat cable to the CCD
unit.
Case 2 Cause CCD unit abnormality
Check
and
remedy Check the CCD unit.
Case 3 Cause SCU PWB abnormality
Check
and
remedy Check the SCU PWB.
Trouble content CCD white scan level abnormality when the copy lamp
is on.
Section Scanner
Case 1 Cause Installation error of the CCD unit flat cable
Check
and
remedy Check the installing state of the flat cable to the CCD
unit.
Case 2 Cause Dirt on the mirror, the lens, or the reference white
plate.
Check
and
remedy Clean the mirror, the lens, or the reference white plate.
Case 3 Cause Copy lamp lighting trouble
Check
and
remedy Check the installing state of the flat cable to the copy
lamp unit.
Case 4 Cause CCD unit abnormality
Check
and
remedy Check the CCD unit.
Case 5 Cause SCU PWB abnormality
Check
and
remedy Check the SCU PWB.
Trouble content Written register value cannot be read correctly
Section Scanner
Case 1 Cause SCU PWB abnormality
Check
and
remedy Check the SCU PWB.
Trouble content LSU BD signal is not detected.
Section PCU
Case 1 Cause Disconnection or improper connection of harness and
connector between LD/BD PWB and LSUcnt PWB
Check
and
remedy Check connection of the harness of each PWB inside
the LSU.
Case 2 Cause 1) Optical axis shift
2) BK laser deterioration, power reduction
3) BD PWB trouble
Check
and
remedy 1) Use SIM61-1 to check the LSU operation.
2) Replace the LSUcnt/BD PWB.
3) If the trouble cannot be removed by the above 1)
to 2), replace the LSU.
Trouble content The color laser does not light up normally.
Section PCU
Case 1 Cause Disconnection or improper connection of harness and
connector between LD PWB and LSUcnt PWB
Check
and
remedy Check connection of the harness of each PWB inside
the LSU.
Case 2 Cause Y/M/C laser deterioration
Check
and
remedy 1) Use SIM61-1 to check the LSU operation.
2) Replace the LSUcnt PWB.
3) If the trouble cannot be removed by the above 1)
to 2), replace the LSU.