I/O Port Check; Controlled Parts Check Procedure - Minolta EP3010 Manual

43

I/O PORT CHECK

43-1. Controlled Parts Check Procedure

To allow the Tech. Rep. to easily and safely determine whether a particular controlled part
is fully operational, this copier provides the following provision: checking the data of the I/O
port of the board IC with the copier in the standby state (including a misfeed, malfunction,
and closure failure condition) allows the Tech. Rep. to determine whether a signal is prop-
erly input to, and output from, a controlled part.
<Procedure>
1. On the circuit diagram accompanying the text, locate the I/O port of the controlled part
which is probably defective when a misfeed or malfunction occurs.
2. Select the "IC Port Data Check" function of "I/O Check" in the Tech. Rep. mode and
access the screen which contains the port identified in step 1 above. (See SWITCHES
ON PWBs/TECH. REP. MODE.)
3. Change or check the input or output port data to determine whether the controlled part
is operational and signals are properly input and output.
4. If the controlled part does not operate properly after changing the output port data,
select "Controller Board Check" of "I/O Check" in the Tech. Rep. mode and determine
whether the board is responsible for that malfunction or not.
Note
Only the output ports given on pages T-37 and 38 may be checked by "Controller Board
Check" of "I/O Check" in the Tech. Rep. mode.
T-2