Ricoh B064 - Page 368

B140 SERIES AND G126 SERVICE MODE
B064 Series/B140 Series/G126 4-44 SM
SC No. Symptom Possible Cause
TD sensor output error 340 C
TD sensor output voltage (Vt),
measured during each copy cycle,
is detected 10 times at one of the
following levels:
Vt = 0.5 volts or lower
Vt = 4.0 volts or higher
• TD sensor defective
• TD sensor harness disconnected
• TD sensor connector disconnected or
defective
• IOB 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 adjustment error 1 341 D
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.
• TD sensor defective
• TD sensor harness disconnected
• TD sensor connector disconnected or
defective
• IOB 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 adjustment error 2 342 D
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
display of 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.
• TD sensor defective
• TD sensor harness disconnected
• TD sensor connector disconnected or
defective
• IOB defective
Development output abnormal 345 D
The high voltage applied to the
development unit is detected 10
times higher than the upper limit
(45%) of PWM.
• Development power pack defective
• Development bias leak due to poor
connection, defective connector
ID sensor error 1 350 C
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
• ID sensor defective
• ID sensor harness disconnected
• ID sensor connector defective
• IOB defective
• ID sensor pattern not written correctly
• Incorrect image density
• Charge power pack defective
• ID sensor dirty