I/O Check; Controlled Parts Check Procedure - Minolta Di620 Troubleshooting Manual

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I/O CHECK

1155SBT0201A

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, malfunction, and closure failure

condition) allows the Tech. Rep. to determine whether signals are properly input to a controlled part.

1) On a circuit diagram accompanying the text, locate the controlled part which is probably defective

when a misfeed or malfunction occurs.

2) Select the "I/O Check" function of the Tech. Rep. mode and 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 whether a signal is properly input to the controlled part.

Example:

When a paper misfeed occurs in the paper take-up section of the copier, 1st Drawer Paper Take-Up

Sensor PC32 is considered to be responsible for it.

1) Remove the sheet of paper misfed.

2) From the I/O check list, it is found that the signal input to PC32 is "Take-Up" of "1st Drawer."

3) Select "I/O Check" of the Tech. Rep. mode and access the screen which contains "Take-Up" of

"1st Drawer."

4) Check that the input port data of "Take-Up" of "1st Drawer" on the screen is "0" (sensor is

unblocked).

5) Move the PC32 actuator to block the sensor.

6) Check, at this time, that the input port data of "Take-Up" of "1st Drawer" on the screen changes

from "0" to "1."

1: PC32 is operational.

0: PC32 is faulty.

T-2

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