Epson Capping Station Stuck in the Up Position After Carriage Motor or Printhead Cable Replacement

Question

I replaced the carriage motor and the printhead data cables while troubleshooting a problem where the printhead carriage was slowing down. After putting the printer back together, the capping station now keeps locking in the raised position, with the wiper blade also staying up.

I had a new capping station purchased from BCH Technologies that I originally intended to install in another printer, so I tried that one as well. Unfortunately, the replacement capping station behaves exactly the same way. I also checked the timing marks and made sure the blue dots were aligned, but the capping station still locks in the raised position.

What could be causing this, and what should I check to get the printer operating again?

Answer

Based on your description, I would first concentrate on resetting and readjusting the capping station's mechanical starting position. The fact that you installed a second capping station and obtained exactly the same behavior makes it less likely that both capping stations themselves are defective. Instead, the problem may involve the starting position, drive timing, carriage position, or something disturbed during the carriage motor and printhead cable work.

Start With the Capping Station Fully Lowered

Before allowing the printer to initialize, I would manually return the capping station to its lowered or resting position.

Disconnect the printer from power before doing this. On the right-hand side of the capping station mechanism, there should be access to the drive mechanism through a slot. You can use a screwdriver to carefully turn the capping station motor or drive mechanism counterclockwise. Turn it gradually until the capping station platform lowers and the wiper blade returns to its normal lowered position.

Do not force the mechanism if it suddenly becomes difficult to turn. The gears, cams, and plastic components in this assembly can be damaged fairly easily.

The important point is that you want the printer to begin its initialization cycle with the capping station lowered rather than already raised against the printhead area.

A capping station that begins in the wrong phase can sometimes move through the wrong portion of its mechanical cycle during startup and end up with the cap or wiper locked in the raised position.

Blue Timing Marks Are Important, but They Are Not the Whole Adjustment

You mentioned that you aligned the blue dots. That is an important step, but the timing marks do not necessarily guarantee that every part of the mechanism is sitting in the correct starting position.

The capping station uses several interacting components, including the motor, gears, cams, wiper mechanism, cap platform, and pump mechanism. It is possible for the visible timing marks to appear correct while the cap platform or wiper is still positioned in the wrong part of its travel.

For that reason, I would use both conditions when setting it up:

• Confirm that the timing marks are aligned.

• Confirm physically that the cap platform and wiper blade are in their lowered starting positions.

Then slowly turn the mechanism by hand through part of its cycle. Make sure the platform rises and falls smoothly and that the wiper moves without binding.

If you feel a hard stop, excessive resistance, or a point where the gears try to jump, stop and inspect the mechanism rather than forcing it.

Check Whether the Carriage Is Interfering With the Capping Station

Since this problem appeared immediately after replacing the carriage motor and printhead data cables, I would also pay close attention to the carriage itself.

The capping station and carriage are mechanically dependent on one another during initialization. The printhead carriage must move completely into and out of its home position. If the carriage cannot reach the expected position, the printer may leave the capping station or wiper in an abnormal position.

With the printer unplugged and the carriage unlocked, carefully move the carriage from side to side by hand. It should move relatively smoothly without suddenly becoming tight near the right side.

Pay particular attention to the area immediately above the capping station. Check whether the printhead, carriage frame, cable, ink tube, or another component is contacting the raised cap or wiper.

Since the printhead cables were recently replaced, also make sure the cables are folded and routed correctly. A cable that bows outward or sits differently from the original routing can create resistance or interfere with carriage movement.

Recheck the Carriage Motor Installation

Because the carriage motor was also replaced, verify that the carriage belt is correctly seated around the motor pulley and that the belt has appropriate tension.

If the belt is riding incorrectly on the pulley, twisted, excessively tight, or rubbing another component, the carriage may not reach the home position correctly. This could be especially relevant because the original reason for replacing the motor and cables was that the printhead carriage was slowing down.

A slowing carriage can be caused by more than the motor itself. Other possibilities include mechanical resistance, contamination on the carriage rail, belt problems, carriage bearing or bushing resistance, cable or ink-tube drag, or position-detection problems.

Therefore, if the original slow-carriage problem remains after replacing the motor, I would not assume that another motor is necessary.

Inspect the Encoder Strip Carefully

Another item worth checking after carriage work is the transparent encoder strip that runs behind the carriage.

The printer uses this strip to determine the carriage's position and movement. If the encoder strip was accidentally pulled out of position, twisted, contaminated, or routed incorrectly while the carriage motor or printhead cables were being replaced, the printer may have difficulty determining where the carriage is.

Inspect the strip and confirm that it passes correctly through the carriage's encoder sensor. Make sure it has not been routed in front of or behind the wrong component.

If it is contaminated with ink or grease, it may need careful cleaning. Avoid scratching the strip or removing the fine positioning marks printed on it.

A carriage-position problem can sometimes appear to be a capping station problem because the printer's initialization sequence depends on knowing exactly where the carriage is located.

Check the Wiper Blade Movement

Because you specifically mentioned that the blade remains raised, examine the wiper mechanism while manually rotating the capping station drive.

The wiper should extend and retract as the mechanism progresses through its cycle. It should not remain mechanically trapped in the raised position.

Look for:

• A wiper blade caught against the carriage or printhead

• A cam that has moved beyond its intended position

• A gear that is installed one tooth out of phase

• Debris or dried ink restricting movement

• A disconnected or incorrectly seated spring

• A linkage that has slipped out of its track

If the new capping station behaves exactly like the old one, however, I would look particularly carefully at anything both stations depend upon rather than assuming that the replacement station has the same defect.

Compare the Old and New Capping Stations Outside the Printer

Since you have two capping stations available, you can compare their mechanical behavior with both removed or disconnected from the printer.

Manually rotate each mechanism and observe the sequence. The cap should rise, the wiper should move through its cleaning operation, and then the assembly should return to its starting position.

If both mechanisms behave normally when operated manually but both lock up after installation, that strongly suggests that the problem is related to installation position, carriage interaction, timing, or the printer's drive/control sequence rather than a defective capping station.

Make Sure Nothing Was Displaced During the Earlier Repair

Whenever a new problem appears immediately after disassembly, I recommend inspecting everything that was moved during the repair before replacing additional components.

In this situation, retrace the carriage motor and printhead cable replacement and check:

• Carriage belt routing

• Carriage motor connector

• Printhead FFC cable routing

• Encoder strip position

• Encoder sensor engagement

• Ink-tube routing

• Cable guides and retaining clips

• Carriage movement near the home position

• Capping station mounting position

• Capping station drive engagement

• Wiper and cap starting positions

Even a cable clip, tube, or bracket sitting slightly differently from its original position can alter the carriage movement enough to create an initialization problem.

Why I Would Reset the Capping Station Before Replacing More Parts

Since both the original and replacement capping stations produce the same symptom, my first action would be to lower the capping station manually and restart the adjustment from that position.

Again, with the printer powered off and unplugged, access the capping station drive from the slot on the right-hand side and carefully turn it counterclockwise with a screwdriver until the cap and wiper are lowered.

Then verify the timing and carriage position before powering the printer back on.

I would avoid replacing additional electronic or mechanical components until you know whether the capping station is simply starting its initialization sequence from an incorrect mechanical position.

About Error Codes

You did not mention a specific error code in your description. If the printer eventually displays an error code after the capping station locks up, write that code down exactly as displayed. The specific error can provide an important clue about whether the printer is detecting a carriage-position failure, mechanical obstruction, motor problem, sensor problem, or another initialization issue.

Also pay attention to exactly what happens immediately before the error: whether the carriage moves left, returns right, slows down, hits the capping station, makes a grinding sound, or stops before reaching the home position. Those details can sometimes be more useful than the final error message itself.

Addressing printer problems can be complicated because many of these repairs require hands-on inspection, adjustment, and testing. For that reason, we're not able to provide ongoing remote troubleshooting, repair instructions, or individualized repair support. We do offer in-person evaluation and repair through our printer diagnostic and repair service [https://bchtechnologies.com/printer-repair-service]. Because demand for this service is high, repairs are handled on a first-come, first-served basis, and it may take several weeks before an appointment or drop-off can be accommodated. Our services can cover either a complete printer or certain individual components, and the service page explains how to proceed. We also recognize that professional repair may not be the most economical option for every printer. For that reason, we strongly encourage self-help research when appropriate. A good starting point is YouTube, including the BCH Technologies YouTube channel [https://youtube.com/@bchtechnologies]. On our channel homepage, you can use the search icon near the "About" section to search for the specific printer model, capping station, carriage, error code, or repair topic you need. I receive dozens of questions every day asking whether we have a video about a particular problem. After creating videos for more than nine years, it is difficult to remember every individual video, so using YouTube's search function is usually the fastest approach. YouTube may also recommend useful repair videos from other creators that address the same issue.

Thank you again for contacting BCH Technologies and for supporting our work. I hope the information above gives you a useful direction for checking the capping station's starting position and the components affected during the recent carriage repair. We sincerely appreciate your engagement with our repair content and wish you the best with getting the printer operating properly again.