Tally T6215, Maintenance Manual

Page: 57 / 164

Chapter 3. Faults and Troubleshooting
3–13
Printed output appears shaky or fuzzy
There are six things that can cause this problem.
1. The platen may be open too far but not far enough to cause a
Platen Open message.
2. The shuttle mechanism is worn—the shuttle counterweight gears or
the bearings are worn.
3. The hammers are not firing properly.
4. Platen alignment may be incorrect.
5. Damaged platen.
6. The Shuttle Sensor is misaligned.
Troubleshooting Procedure
Step 1. Check the Platen Gap Lever and make sure it is closed properly.
Step 2. Check the Shuttle Mechanism for wear in the gears or play in the bearings.
If the Shuttle Mechanism is defective, replace the Shuttle Mechanism, then perform a
Hammer Calibration procedure for optimum print quality.
Step 3. Perform a Hammer Calibration procedure. This procedure is explained in Chapter 2 , in the
TEST Menu Section, under the Diagnostic Category ( PrntCal Parameter).
If the hammers can not be calibrated, the problem is in the Engine Controller CBA. Replace
the Engine Controller CBA following the procedure explained in
Chapter 4 .
Step 4. Check and adjust the platen alignment guides. The Platen Gap should be .012 " – .014"
with the Platen Gap Adjustment Wheel fully closed.
Step 5. Check the impact area of the platen and replace the platen if this area is damaged.
Step 6. Make sure the Shuttle Sensor is properly aligned. (See Procedure 18 in Chapter 4 .)
Character columns not printing
There are five things that can cause this problem.
1. Broken Hammer.
2. Defective Hammer Coil; either shorted or open.
3. Defective Hammer Bank Cable.
4. Malfunctioning Engine Controller Board.
5. The hammer may be sticking due to contamination, such as paper
and ink buildup.