Tally T6215, Maintenance Manual

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T6215 Maintenance Manual
3–14
Troubleshooting Procedure
Step 1. Open the cover and paper guide areas.
Step 2. Inspect the Hammer Bank cables for rub spots, cracked insulation, burn spots, etc.
If any physical defects are found in the cables, remove and replace the Cable
Assembly and correct the cause of the problem with the cable.
Test the printer to see if the problem is still present. If it isn’t, reinstall the cover,
etc. and place the printer back in service.
If the problem is still present, proceed to STEP 3.
If no physical defects are found proceed to the next step.
Step 3. Remove the Ribbon Cartridge and Ribbon Platform.
Step 4. Check continuity from the Hammer Bank Cable Connector to the affected coils.
Step 5. Check continuity of the Hammer Coil. Resistance of the coil should be 12
Ω
(Ohms)
±
.3
Ω
at 70
°
F. If the coil resistance is outside of this range, remove and replace the Hammer
Module.
If the Hammer Coil is defective, check the Hammer Driver on the Engine Controller Board
also. Defective Hammer Drivers can cause problems with Hammer Coils. Instructions for
checking Hammer Drivers are located at the end of this chapter.
Step 6. Is the hammer broken or defective? If so, remove and replace the Hammer Module.
Step 7. Check between the Hammer Plate and the Hammer Module Return Plate and between the
Hammer Head and Hammer Coil for ink and paper buildup. Clean the Hammer Bank by
prying out
gently on the hammer with your finger and running a piece of paper behind the
hammer to remove the contamination. For stubborn buildup you may use a little isopropyl
alcohol on the paper to loosen the contamination.
Step 8. If there are no physical defects, shorts, or opens, the likely cause of the problem is a
malfunctioning Engine Controller Board. Remove and replace the Engine Controller Board.