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MX-2300/2700 N/G SELF DIAG AND TROUBLE CODE 8 – 11
* 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
E7-28 LSU control ASIC connection abnor-
mality
E7-29 LSU-ASIC frequency abnormality
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.
Trouble content
Access error between the CPU of the PCU PWB and
the LSU control ASIC
Section
PCU
Case 1
Cause
<When this trouble occurs in the initial process on turn
on the power>
Communication connector trouble between the PCU
PWB and the LSUcnt PWB (interface PWB). Harness
trouble.
Check
and
remedy
Check the connector connection between the PCU
PWB and the LSUcnt PWB (interface PWB).
Check the harness. If the trouble cannot be removed,
replace the LSUcnt PWB or the PCU PWB.
Case 2
Cause
<When this trouble occurs on starting printing/during
printing, and SIM61-1 is used to check the LSU unit
operation for each of B/W and COLOR and the
judgment is NG.>
Connected the connector between the PCU PWB and
the LSUcnt PWB (interface PWB) / Harness trouble
Check
and
remedy
Check the harness between the PCU PWB and the
LSUcnt PWB (interface PWB). If the trouble cannot be
removed, replace the LSUcnt PWB or the PCU PWB.
Case 3
Cause
PCU PWB or LSUcnt PWB (interface PWB) trouble
Check
and
remedy
Replace the PCU PWB or the LSUcnt PWB (interface
PWB).
Trouble content
Oscillation trouble of the external oscillator used in
LSU-ASIC and the internal oscillation circuit
Section
PCU
Case 1
Cause
Trouble of the oscillator on the LSU-ASIC PWB, the
resistor and capacitor for the oscillation circuit, and the
LSU-ASIC itself.
Check
and
remedy
Replace the LSUcnt PWB.