Ricoh A-P4, Руководство по обслуживанию

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The ID sensor pattern edge voltage was not
equal to 2.5 V and two samplings within
800 ms.
• ID sensor defective
• IOB defective
• HVPS defective
• ID sensor dirty
353 D
ID sensor, LED current abnormal at initial-
ization
• ID sensor connector or harness loose,
broken, or defective
• ID sensor defective
• IOB defective
• HVPS defective
• ID sensor dirty
One of the following ID sensor output volt-
ages is detected at ID sensor initialization.
• Vsg less than 4.0V when the maximum
PWM input (255) was applied to the
ID sensor.
• Vsg exceeded 4.0V when the mini-
mum PWM input (0) is applied to the
ID sensor.
354 D
ID sensor timeout abnormal at adjustment • ID sensor connector or harness loose,
broken, or defective
• ID sensor defective
• IOB defective
• HVPS defective
• ID sensor dirty
Vsg fell out of the adjustment target range
(4.0
±
0.2V) at the start of Vsg checking
after 20 sec.
390 D
TD sensor error: Abnormal measurement
• TD sensor connector or harness loose,
broken, defective
• TD sensor defective
• IOB) defective
• Toner supply defective (confirm that
the toner seal strip has been removed
from toner cartridge)
The TD sensor output voltage was less than
0.5V, or more than 4.8V 10 consecutive
times during copying.
-or-
The output was less than 2.5V after a new
PCDU was installed.
391 D
TD sensor error: Auto adjust error • TD sensor connector or harness loose,
broken, defective
• TD sensor defective
• IOB defective
During automatic adjustment of the TD sen-
sor, output voltage was less than 1.8V, or
Service Call Conditions
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