Minolta CF910 Service Manual page 388

- What Malfunction Each Code Represents (Machine Status 2) -
• If a particular image stabilizer part develops a malfunction, the corresponding code is
marked with "NG" on the "Machine Status 2" screen. Listed below is what malfunction
each code shown on the screen represents. Study the list and take necessary remedial
action. (For more details, see p. T-76.)
Malfunction
Code
Description
P-1 LD malfunction
P-2 Vg malfunction
P-3 PC Drum mal-
function
P-4 V0 Sensor mal-
function
P-5 AIDC Sensor
malfunction
P-6 C Developing
Unit malfunction
P-7 M Developing
Unit malfunction
P-8 Y Developing
Unit malfunction
P-9 Bk Developing
Unit malfunc-
tion 1
P-10
• The AIDC toner density (the attracted amount of toner
detected by the AIDC Sensor) is solid (more than 0.6 mg/
2
cm ) for all colors, Ks (PC Drum sensitivity constant) is faulty
(not in the range 200 to 500), and charging efficiency is faulty
(not in the range 750 to 1100).
• The AIDC toner density is solid for all colors and Ks is faulty,
while charging efficiency is normal.
• The AIDC toner density is zero (less than 0.05 mg/cm
all colors and Ks is faulty.
• The AIDC toner density, Ks, and all Developing Units are
normal, while charging efficiency is faulty.
• The AIDC toner density is solid for all colors, Ks is normal,
and charging efficiency is faulty.
• The AIDC toner density and charging efficiency are normal,
while Ks is faulty.
• The V bias potential (the first potential of ten-point detection
at VG500, 900, and 700V) is lower than the Vr (residual
potential) +50V and remains below 10V.
• The V bias potential is lower than the Vr +50V and is 10V or
higher.
• The AIDC toner density is normal, while Ks and charging effi-
ciency are faulty.
• The AIDC toner density is zero for all colors, Ks is normal,
and charging efficiency is faulty.
• The AIDC toner density is zero for all colors, and Ks and
charging efficiency are normal.
• The AIDC toner density three-point detection order is wrong,
or the toner density of AIDC detection exposure level 1
exceeds 0.6 mg/cm
exposure level 3 falls short of 0.05 mg/cm
Unused
T-22
Detection Timing
2
, or the toner density of AIDC detection
2
) for
2
.