I/O Port Check; Controlled Parts Check Procedure - Minolta EPI 054 User Manual

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 TROUBLESHOOTING
98.05.15
2

I/O PORT 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 of the data of the I/
O port on 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 a signal is
properly input to, and output from, a controlled part.
<Procedure>
1. When a paper misfeed or malfunction occurs, identify the I/O port of the possibly defec-
tive controlled part by reviewing the text or I/O port check list.
2. Select the I/O Check function of the Service mode and show on the Touch Panel the
status of the I/O port identified in step 1.
3. Check the input or output port data to determine whether the controlled part is opera-
tional and signals are properly input and output.
<Controlled Part Check Procedure by Changing Input Port Data>
Example
When a paper misfeed occurs in the paper take-up section of the copier, 1st Drawer Paper
Take-Up Sensor PC55 is considered to be responsible for it.
<Procedure>
1. Remove the sheet of paper misfed.
2. From the I/O port check list, it is found that the H/L input signal to PC55 is supplied from
PWB-A (IC4A) APA1.
3. Select the I/O Check function from the Service mode menu and, using the Paper Select
key, show the status of PWB-A (IC4A) APA1 on the control panel.
4. Check that the second LED from the right of the Exposure Level Display lights up (sen-
sor being unblocked).
• Zoom Ratio Indicator
• Multi-Copy Display
• Exposure Level Display
5. Move the PC55 actuator to block the sensor.
6. Check at this time that the LED goes out.
ON: PC55 is faulty. OFF: PC55 is operational.
XAPA
4A
7 6 5 4 3 2 1 0
T-2