Counter Circuits - Ricoh FT5540 Service Manual

15.8 COUNTER CIRCUITS

Total Counter
The CPU energizes the total counter by supplying a LOW signal at CN101-A12. This energizes
the counter and closes the internal contact (counter confirmation). When the contact closes,
CN102-A25 goes HIGH (5 volts dc) and the CPU determines that the counter has energized.
If the CPU does not receive a HIGH signal at CN102-A25 when the total counter is energized,
SC 91 is displayed.
Key Counter (Option)
With this option, the copier will not operate unless the key counter is inserted.
The operation of this counter is the same as the total counter, however, there is no service call
condition provided if the confirmation signal is not received by the CPU.
11" x 17" / A3 Counter (Option)
This counter keeps count of all 11" x 17" / A3 copies made. The operation is the same as for
the other counters.
2-117
31 August 1989