Ricoh A151, Field Service Manual

Page: 197 / 397

Check the following points:
•
CN119-5 (Charge trigger line) and CN119-3 (Grid trigger line)
(1) If the signal stays HIGH after the Start key is pressed, replace the
main board.
(2) If the charge corona does not turn on even if the signal changes to
LOW, replace the CC/Grid/Bias power pack.
•
CN117-13 (Transfer trigger line)
(1) If the signal stays HIGH after the Start key is pressed, replace the
main board.
(2) If the transfer corona does not turn on even if the signal changes to
LOW, replace the TC/SC power pack.
If there is no problem with the signal lines, replace the drum if the sensitivity
does not recover even when the drum is not exposed to light.
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FSM 6-3 A151/A152