SUBJECT: Carriage Tachometer Error on LCD Display
PRODUCT: EUROLINE - 4240, 4260, 4280.
ORIGINATOR: Chad Fogus
DATE: 01/02/2001
TECH BULLETIN NO#:

PROBLEM/SYMPTOM:
"Carrg Tachometer Err" message displayed on 42xx Euroline printer

CAUSE:
3/4 amp fuse installed on motor driver board. If the ribbon motor draws too much current during a print job: the processor is looking at the tachometer signal from the carriage motor, and the motor slows down, causing the Carr Tach Err to be displayed.

SOLUTION/PROCEDURE:
If after confirming the printer's motor pulley, drive belt, motor cabling, tachometer cabling; and measurements with an ohm meter between the power input terminals of the carriage motor shows no signs of failure, the fuse on motor driver board may be the cause.

SUMMARY:
Some motor driver boards, for the 4240 and 4260 Euroline printers, part number 040-00087-02, were released with a 3/4 amp fuse. These boards function with any older ribbon motors. The vendor of the ribbon drive motor, part number 046-00265-00, changed the internal specifications of the unit, making it necessary for a one amp fuse to be used in place of the 3\4 amp fuse. Currently part number 040-00128-03 (42xx motor driver board) works with all Euroline printer models. The fuse is not user replaceable; it requires a repair by a certified repair technician. Call OTC Technical Support for further information about repair and warranty verification.