Ricoh MT-C1 Service Manual page 435

15 February 2006
340 C TD sensor output error
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
341 D 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 D 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
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.
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
B140/B246 SERIES SERVICE MODE
• 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 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 defective
• TD sensor harness disconnected
• TD sensor connector disconnected or
defective
• IOB defective
• Development power pack defective
• Development bias leak due to poor
connection, defective connector
• 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
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