CHAPTER 5 SELF DIAGNOSIS
5-12
Code
Cause
• The laser is faulty.
• The laser light is inadequate.
• The bending mirror is faulty.
• The laser shutter is faulty.
• The laser is faulty.
• The dark area potential attenuation
is at the upper control limit.
• The grid bias is at the upper
control limit.
• The grid bias is at the lower
control limit.
• The developing bias is at the upper
control limit.
• The developing bias is at the lower
control limit.
• Vd1 is at the upper measurement
limit.
• The photosensitive drum has
deteriorated.
• VL1 is at the upper measurement
limit.
• Vd2 is at the upper measurement
limit.
• VL2 is at the upper measurement
limit.
• Vd1 is at the lower measurement
limit.
• VL1 is at the lower measurement
limit.
• Vd2 is at the lower measurement
limit.
• VL2 is at the lower measurement
limit.
Timing of detection
0051 Vd1 is 300 V or less and, in
addition, Vd2 is 500 V or less.
0052 VL1 is 200 V or more and, in
addition, VL2 is 250 V or
more.
0053 Vd1 is 100 V or less and, in
addition, is 150 V or less.
0060 The dark are potential
attenuation value is 150 V or
more.
0070 The grid bias output value is
900 V or more.
0071 The grid bias output value is
100 V or less.
xx80 The developing bias output
value is 700 V or more.
xx81 The developing bias output
value is 200 V or less.
0090 Vd1 is 700 V or more.
0091 VL1 is 200 V or more.
0092 Vd2 is 850 V or more.
0093 VL2 is 250 V or more.
0094 Vd1 is 350 V or less.
0095 VL1 is 10 V or less.
0096 Vd2 is 550 V or less.
0097 VL2 is 50 V or less.
E061
