Tally T6215 Maintenance Manual - page 55

Chapter 3.  Faults and Troubleshooting

3–11

The Printer powers up but the Control Panel does not function.

There are four things that can cause this problem.

1. A bad connection.

2. A bad control panel.

3. A bad Engine Controller Board.

4. Loss of 5 V power supply.

If the yellow Power On Indicator is the only one that does not function, the

problem is most likely a malfunctioning Control Panel.

Troubleshooting Procedure

Step  1.

Check the form movement keys to see if they function.

If the form movement keys function properly, the problem is either in the Control Panel or

in the Engine Controller Board.

Try another Control Panel first.  If that does not correct the problem, then remove and

replace the Engine Controller Board.

Step  2.

If the form movement keys do not function properly, check the Control Panel connection to

the Engine Controller Board.

If the connection is OK, the problem is in either the Control Panel or in the Engine Control-

ler Board.  Try another Control Panel first.  If that does not correct the problem, then

remove and replace the Engine Controller Board.

The Control Panel Display functions partially, nonsensically, or not at all.

There are three things that can cause this problem.

1. A bad connection.

2. A malfunctioning Control Panel.

3. A malfunctioning Engine Controller Board.

Troubleshooting Procedure

Step  1.

Check the Control Panel connection to the Engine Controller Board.

Step  2.

If the connection is OK, the problem is in either the Control Panel or in the Engine Control-

ler Board.

Try another Control Panel first.  If that does not correct the problem, then remove and

replace the Engine Controller Board.