The Printer Powers Up But The Control Panel Does Not Function; The Control Panel Display Functions Partially, Nonsensically, Or Not At All - Tally T6090 Maintenace Manual

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 CBA.
4. Loss of 5 V power supply.
If the red 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 CBA.
Try another Control Panel first. If that does not correct the problem, then remove and
replace the Engine Controller CBA.
STEP 2. If the form movement keys do not function properly, check the Control Panel connec-
tion to the Engine Controller CBA.
If the connection is OK, the problem is in either the Control Panel or in the Engine
Controller CBA. Try another Control Panel first. If that does not correct the problem,
then remove and replace the Engine Controller CBA.

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 CBA.
Troubleshooting Procedure
STEP 1. Check the Control Panel connection to the Engine Controller CBA.
STEP 2. If the connection is OK, the problem is in either the Control Panel or in the Engine
Controller CBA.
Try another Control Panel first. If that does not correct the problem, then remove and
replace the Engine Controller CBA.
Chapter 3: Troubleshooting
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