Specifications

1-4. Method for Checking the Control Parts with Loads
To check the Control parts easier and safer, this copier allows the Technical
Representative to determine whether a control part is fully operational and signals are
input and output properly by changing or checking the I/O port data of the board IC
with the copier in the standby state (including where a misfeed, malfunction or setting
fault condition exists).
Procedure
1. On the circuit diagram accompanying the text, locate the I/O port of the control part which is
probably faulty when a misfeed or malfunction occurs.
2. Select the function "I/O Port Data" of "I/O Check" in the Tech. Rep. mode and call up the screen
which contains the port identified in Step 1) above. (See the SWITCHES ON PWBs Section.)
3. Change or check the input or output port data to check that the control part is operational and
signals are input and output properly.
4. If the control part does not operate after the output port data has been changed, select "Board
Check" of "I/O Check" in the Tech. Rep. mode and determine whether the cause of the problem
is the board or any other functional unit.
T-2