- Dot matrix printer head test software driver#
- Dot matrix printer head test software manual#
- Dot matrix printer head test software series#
- Dot matrix printer head test software zip#
This value is related to the printer's automatic head gapping routine – setting a correct gap for thick and thin paper – and important to the life of the new print head. These adjustments write the new head’s "alpha" value to memory on the logic board.
Dot matrix printer head test software manual#
This requires a technical manual and wide format (14 inch) paper.
Dot matrix printer head test software series#
With the exception of the DFX-5000, adjustments must be made after replacing a DFX series print head. If one is damaged, the head must be replaced. The print head cables are permanently attached to ALL DFX series printers. Specific information regarding DFX series printers.
Dot matrix printer head test software zip#
Call Epson’s automated referral system at 80 to locate an authorized service provider based on your zip code. If reading schematics and using a meter aren’t part of your job description, there's an easy way to find somebody better qualified.
If a new head is installed prior to addressing the defective driver circuitry, it will be rapidly damaged in the same manner as the old head. manual – indicates there is a problem with the transistor responsible for firing it. A solenoid that measures very high or very low resistance – relative to the norm given in the tech.
Dot matrix printer head test software driver#
Compass Micro is not allowed to distribute technical information of any kind.Ĭhecking solenoids may sound like overkill, but this is where you can get in serious trouble replacing a print head! Right after "broken pins" and "damaged head cables" on the list of why print heads don’t print correctly is, "failed driver circuitry." This is the reason Compass Micro will not accept a returned print head – damaged driver circuitry is bad news! Measuring resistance through the head solenoids will help reveal a problem with the driver circuitry on the main/driver/logic board.
Checking solenoids requires Volt-Ohm meter and, in most cases, a technical manual. A 9-pin head (FX or LX model) has 9 individual solenoids. Better yet, unplug both ends of the cable and test continuity with a meter.Īside from examining the head cables, the second basic step in diagnosing a dysfunctional dot head is measuring the resistance through the pin solenoids. Therefore, the head cables should always be examined for any obvious flaws before concluding that the head has failed. This can happen if the ribbon cable snags something while the carriage unit is moving back and forth. We've also seen head cables simply wear through from rubbing against the bottom of the ribbon cartridge after years of use. If the ribbon cable(s) connecting the print head to the main board is damaged, one or more of the signals to fire a pin will not reach the head. While a broken pin is the most common reason a row of dots does not appear, it’s also possible that the signal to fire the pin is not reaching the print head. There are, however, other reasons a pin may fail to strike the paper! If nothing else is damaged, repairing the problem is as simple as replacing the head. The pins simply break off and the remaining portion of the dot wire is too short to impact the paper. The most common print quality problem with dot matrix printers is a, "missing horizontal line of dots." For business applications, such as invoicing, the pins responsible for underlining, or crossing letters like A, E, H, etc., will usually fail first because they’re doing more work than the others are. The basics, that apply to all dot matrix heads. Epson dot matrix, print head technical information.
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