L TROUBLESHOOTING > 2. MALFUNCTION CODE
L-17
d-Color MF4003/MF3303
2.4 P-5
Contents
Malfunction type
IDC sensor failure
Malfunction code
P-5
Malfunction detection timing
• During IDC sensor light intensity correction, IDC sensor output is uncompleted.
• During IDC base surface detective control, sensor output voltage detected is under 0.7 V or over 3.35V.
• During image stabilization (gamma correction control), detected output value for IDC sensor did not go
below threshold (half the value of what is detected by IDC sensor on the belt surface) for three
consecutive times (position of the pattern end is not detected).
Relevant parts
• Transfer belt unit
• IDC sensor (IDCS1)
• High voltage unit (HVPS)
• Base board (BASEB)
Procedure
1.
Wipe clean the surface of the transfer belt with a soft cloth, if it is dirty.
2.
Replace the transfer belt unit
if the transfer belt is damaged.
3.
Reinstall or reconnect IDCS1, connectors connecting between IDCS1-relay CN70-BASEB CN22E, if any of the foregoing parts is installed
or connected improperly.
4.
Clean IDCS1, if it is dirty.
5.
Check the connector between HVPS CN1-BASEB CN4E for proper connection.
6.
Open/close the front door, run an image stabilization sequence, and select [Service Mode] -> [State Confirmation] -> [Level History 1] to
check the IDC value.
IDC1: IDCS1
If the value is 1.0 V or less, replace IDCS1.
7.
2.5 P-6, P-7, P-8, P-9
Contents
Malfunction type
Imaging unit (C) failure, Imaging unit (M) failure, Imaging unit (Y) failure, Imaging unit (K) failure
Malfunction code
P-6, P-7, P-8, P-9
Malfunction detection timing
All density readings taken from the density pattern produced on the transfer belt are 1.0 g/m
2
(IDC sensor
photo receiver output) or less during max. density adjustment (Vg/Vdc adjustment).
Relevant parts
• Imaging unit/Y,M,C,K
• Transfer belt unit
• IDC sensor (IDCS1)
• Base board (BASEB)
• High voltage unit (HVPS)
Procedure
1.
Check the setting value in [Max Image Density Adj] of [Service Mode] -> [Imaging Process Adjustment] and, if it is negative, readjust.
2.
Check the drive transmission portion of the imaging unit and correct as necessary.
3.
Clean IDCS1 window if dirty.
4.
Clean the contact of the imaging unit connector if dirty.
5.
Check the connector between HVPS CN1-BASEB CN4E for proper connection.
6.
7.
Replace the transfer belt unit.
8.
9.
2.6 P-21
Contents
Malfunction type
Color regist test pattern failure
Malfunction code
P-21
Malfunction detection timing
• During pre-pattern detection, pre-pattern edge (start/ end point of effective area) is not detected within
the pre-pattern search area.
• During detection of regist pattern at vertical/horizontal direction, pattern edge (start/end point of effective
area) is not detected within the pattern search area of each unit.
Relevant parts
• Transfer belt unit
• PH unit
• Base board (BASEB)
Procedure
1.
Wipe clean the surface of the transfer belt with a soft cloth, if it is dirty.
2.
Replace the transfer belt unit
if the transfer belt is damaged.
3.
4.
Y119930-3
Service Manual
Summary of Contents for d-Color MF 4003
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