Description: P-6, P-7, P-8, P-9 Drum/Development unit (C) failure, Drum/Development unit (M) failure, Drum/Development unit (Y) failure, Drum/Development unit (K) failure • All density readings taken from the density pattern produced on the transfer belt are 1.0 g/m2 (IDC sensor photo receiver output) or less during max. density adjustment (Vg/Vdc adjustment). • All density readings taken from the density pattern produced on the transfer belt are 4.0 g/m2 (K), 3.5 g/ m2 (Y,M,C) (IDC sensor photo receiver output) and more during max. density adjustment (Vg/Vdc adjustment).
Causes: • Drum unit/Y,M,C,K • Developing unit/Y,M,C,K • IDC sensor/Fr (IDCS/Fr) • IDC sensor/Rr (IDCS/Rr) • Base board (BASEB) • High voltage unit (HV) • Transfer belt unit
Remedy: 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 drum/developing unit and correct as necessary. 3. Clean the IDC sensor/Fr (IDCS/Fr) or IDC sensor/Rr (IDCS/Rr) window if dirty. 4. Clean the contact of the drum/developing unit connector if dirty. 5. Check the connector between HV CN1-BASEB CN26E, HV CN2-BASEB CN21E for proper connection. 6. Replace the drum unit. 7. Replace the developing unit. 8. Replace the transfer belt unit. 9. Replace HV. 10. Replace BASEB.
Code: S-1
Description: CCD gain adjustment failure It is detected that the CCD clamp gain adjustment value is faulty.
Causes: • LED exposure unit • CCD unit • Scanner drive board (SCDB) • Base board (BASEB)
Remedy: 1. Correct the connector connection between CCDB CN2-BASEB CN6 if faulty. 2. Check for possible extraneous light and correct as necessary. 3. Clean the lens, mirrors, CCD surface, and shading sheet if dirty. 4. Correct reflective mirror of the scanner if faulty, or change scanner mirror. 5. Replace the CCD unit. 6. Replace SCDB. 7. Replace BASEB.
Code: S-2
Description: CIS gain adjustment failure (When DF-714 is installed) It is detected that the CIS clamp gain adjustment value is faulty.
Causes: • CIS module (CIS) • CPU board (CPUB) • Base board (BASEB)
Remedy: 1. Correct the connector connection between CIS J221-BASEB CN5 if faulty. 2. Check CPUB for proper installation and correct as necessary. 3. Check for possible extraneous light and correct as necessary. 4. Wipe clean the back side scanning glass surface and shading sheet. 5. Replace CIS. 6. Replace CPUB. 7. Replace BASEB.