I/O Check; Controlled Parts Check Procedure - Minolta Di350 Service Manual

FrameMaker Ver.5.5E(PC) Di350 TROUBLESHOOTING
98.12.09
2

I/O CHECK

2-1.

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
input port of the board IC with the copier in the standby state (including a misfeed, malfunc-
tion, and closure failure condition) allows the Tech. Rep. to determine whether signals are
properly input to a controlled part.
<Procedure>
1. When a misfeed or malfunction occurs, locate on a circuit diagram accompanying the
text the controlled part which is probably defective.
2. Select "I/O Check" from the Tech. Rep. Mode menu screen and then access the screen
which contains the controlled part picked out in step 1 above. (See SWITCHES ON
PWBs/TECH. REP. MODE.)
3. Check the input port data to determine if a signal is probably input to the controlled part.
<Controlled Part Check Procedure Through Checking Input Port Data>
Example
When a paper misfeed occurs in the paper take-up section of the copier, Synchronizing
Roller Sensor PC2 is considered to be responsible for it.
<Procedure>
1. Remove the sheet of paper misfed.
2. From the I/O Check list, it is found that the signal input to PC2 is "Timing Roller."
3. Select "I/O Check" from Tech. Rep. Mode and then "Printer." Now, access the screen
that contains "Timing Roller."
4. Check that the input port data of "Timing Roller" is "0" (sensor is blocked).
5. Move the PC2 actuator to unblock the sensor.
6. Check at this time that the input port data on the screen changes from "0" to "1."
1: PC2 is operational. 0: PC2 is faulty.
T-2