Ricoh B064 SERIES Service Manual page 456

B064 SERIES SERVICE MODE
SC No.
341 C TD sensor adjustment error 1
During the TD sensor auto
adjustment, the TD sensor output
voltage (Vt) is 2.5 volts or higher
even though the control voltage is
set to the minimum value (PWM =
0)
When this error occurs, SP2-906-1
reads 0.00V.
Note: This SC is released only after
correct adjustment of the TD sensor
has been achieved. Switching the
machine off and on will cancel the
SC display, but does not release ID
sensor toner supply.
342 C TD sensor adjustment error 2
During the TD sensor auto
adjustment, the TD sensor output
voltage (Vt) does not enter the
target range (3.0 ± 0.1V) within 20
s.
When this error occurs, the
indication of SP2-906-1 reads
0.00V.
Note: This SC is released only after
345 D Development output abnormal
The high voltage applied to the
development unit is detected 10
times higher than the upper limit
(45%) of PWM.
350 C ID sensor error 1
One of the following ID sensor
output voltages was detected twice
consecutively when checking the ID
sensor pattern.
Vsp ≥ 2.5V
Vsg < 2.5
Vsp = 0V
Vsg = 0
351 C ID sensor error 2
The ID sensor output voltage is
5.0V and the PWM signal input to
the ID sensor is 0 when checking
the ID sensor pattern.
B064 Series/B140 Series
/B246 Series/D052 Series
CÓPIA NÃO CONTROLADA
Symptom
correct adjustment of the TD
sensor has been achieved.
Switching the machine off
and on will cancel the SC
display, but does not release
ID sensor toner supply.
CÓPIA NÃO CONTROLADA
Possible Cause
• TD sensor defective
• TD sensor harness disconnected
• TD sensor connector disconnected or
defective
• BCU defective
• Toner bottle motor defective
Note: When the TD sensor is defective, the
toner supply is controlled using pixel
count and the ID sensor.
• TD sensor defective
• TD sensor harness disconnected
• TD sensor connector disconnected or
defective
• BCU defective
• Development power pack defective
• Development bias connection defective
• Development bias connector
disconnected or defective
• ID sensor defective
• ID sensor harness disconnected
• ID sensor connector defective
• BCU defective
• Defect at ID sensor pattern writing
• Charge power pack defective
• ID sensor dirty
• ID sensor defective
• ID sensor harness disconnected
• ID sensor connector defective
• BCU defective
• Defect during ID sensor pattern writing
• Charge power pack defective
• ID sensor dirty
4-18 SM