Quick Answer
A dirty thermal head causes streaky, faint, or striped ultrasound prints on the Sony UP-D898MD and UP-X898MD. Sony's own manual calls for cleaning it with the supplied cleaning sheet through the printer's built-in menu — no alcohol, no swabs, no disassembly. It takes about two minutes. Pair that maintenance with Durico 1100S compatible paper, built with a foil-sealed pouch and anti-static layer, and you'll need to do it less often.
Why the Thermal Head Gets Dirty in the First Place
Every thermal printer image is created by heating tiny elements on a print head as paper passes beneath it. Over hundreds of prints, dust, paper coating residue, and static buildup collect on that head. The result shows up as white streaks, faint bands, or a print that looks noticeably lighter on one side than the other. It's a maintenance issue, not a printer failure — and it's one of the most common calls imaging departments make to service before checking the simple fix first.
If your prints are coming out blank, faint, or streaky and cleaning doesn't resolve it, our troubleshooting guide for blank, faint, or streaky prints walks through the next steps — including paper loading and printer settings that can mimic a dirty head.
How to Clean the Thermal Head — Step by Step
This procedure is drawn directly from Sony's own instructions-for-use manual for the UP-X898MD (and the near-identical maintenance section for the wider 895/897/898 printer family). The Sony 898-series unit uses a menu lever or jog dial instead of physical alcohol swabs — do not attempt to clean the head with any other tool or liquid, since the manual explicitly limits cleaning to the supplied sheet.
- Power the printer on. Press the power ON/OFF switch to the "on" position.
- Open the door. Press the OPEN button. If paper is loaded in the tray, remove it — and be careful not to let the paper surface touch anything else, since that can transfer dirt back onto future prints.
- Insert the cleaning sheet. Slide the supplied cleaning sheet into the groove of the paper tray with the black surface facing down.
- Close the door. Push it firmly shut.
- Open the menu. Push the menu lever (or jog dial on older 897-series units).
- Select the cleaning function. Scroll to "CLEAN.TH" (or "CLEAN" on the 897-series jog-dial menu) and push the lever/dial to confirm.
- Confirm and run. With "CLEAN:OK" displayed, push the lever again. The printer feeds the cleaning sheet through and displays "CLEAN:TH" while it works. Cleaning is finished when the sheet stops moving (or the alarm sounds, on 897-series units).
- Remove the sheet. Press OPEN, take out the cleaning sheet, and close the door.
- Reload your paper and run a test print to confirm the streaking or fading is gone.
Important caution from Sony's manual: a paper cutter is mounted inside the unit near the tray. Keep fingers clear of it during this process. Sony's documentation is also explicit on frequency: clean the thermal head only when needed. Cleaning it too often can itself cause a malfunction — this isn't a "run it every week" maintenance task, it's a response to an actual print-quality problem.
Need the paper-loading steps that come right before this? See our step-by-step paper loading guide for the Sony UP-D898MD.
Sony UP-D898MD / UP-X898MD Compatible Paper — Durico Options
The 898-series shares its media specification with the rest of Sony's current ultrasound printer line, so all three Durico grades built for that series will run in your printer. Which one you pick depends on the print — daily clinical documentation, high-contrast diagnostic grayscale, or presentation-quality keepsakes.
| Sony model / series | Durico equivalent | Spec | PIS product link |
|---|---|---|---|
| Sony UP-895 / 897 / 898 Series (includes UP-D898MD, UP-X898MD) | Durico 1100S — Standard | 110mm × 20m, matte finish, most economical | Durico 1100S (5-roll box) |
| Sony UP-895 / 897 / 898 Series | Durico 1100HG — High-Gloss | 110mm × 18m, high gloss (most glossy in the line) | Durico 1100HG (5-roll box) |
| Sony UP-895 / 897 / 898 Series | Durico 1100HD — High-Density | 110mm × 20m, semi-gloss, high-density grayscale | Durico 1100HD (5-roll box) |
For most departments running the UP-D898MD or UP-X898MD day to day, Durico 1100S is the default: it's the Sony UPP-110S equivalent at the standard matte finish, priced for high-volume use. If you need punchier grayscale separation for diagnostic reads, step up to 1100HD. If the prints are headed home with patients — 3D/4D keepsakes, OB/GYN images — 1100HG's glossier finish gives a more presentation-grade result.
Why Paper Quality Affects How Often You'll Be Cleaning That Head
A dirty thermal head isn't only a function of print volume — it's also a function of what's shedding onto it. Durico's ULSTAR line for Sony-compatible printers is built as a 5-layer construction (film substrate, UV-cured glossy layer, protective layer, thermal coat layer, and back-coat layer) with a built-in anti-electrostatic layer specifically engineered to help prevent thermal head damage from static buildup. Each roll ships in an individually sealed foil pouch, which keeps dust and humidity off the media until it's loaded — both meaningful contributors to head contamination over time.
Durico also states its ULSTAR papers deliver first-class colour intensity from the highest black colour density available in the line, with precise grayscale gradation — described qualitatively by the manufacturer rather than as a specific published number. The paper is FDA registered and produced under ISO 9001, ISO 14001, and ISO 13485 certification at Durico's own South Korean manufacturing plant — it isn't outsourced or white-labeled, which is part of why the roll-to-roll consistency holds up over high print volumes.
Sony OEM vs. Durico — What You're Actually Paying
Sony OEM UPP-110S typically runs in the $90–$130 range per 10-roll case from medical resellers, with UPP-110HG (high-gloss) running higher, often $140–$190 per case, before shipping. Durico 1100S (10-roll box) and Durico 1100HG (10-roll box) are priced to land roughly 25–30% below those OEM ranges, which is the savings level Durico publishes for its line compared to competing product — same roll geometry, same printer fit, lower cost per case for departments burning through paper every week.
Frequently Asked Questions
How often should I clean the thermal head on a Sony UP-D898MD or UP-X898MD?
Only when you actually see a print-quality problem — dirty-looking output or white stripes. Sony's manual is explicit that cleaning it more often than necessary can cause a malfunction, so this isn't a scheduled weekly task; it's a response to a symptom.
Do I need Sony's official cleaning sheet, or can I use alcohol and a cloth?
Sony's instructions call for the supplied cleaning sheet run through the printer's built-in menu function. The manual does not describe an alcohol-swab or manual-wipe procedure for the thermal head itself, so stick to the cleaning-sheet method described above.
Will switching to Durico paper affect how often I need to clean the head?
Durico's ULSTAR papers are built with a foil-sealed pouch and an anti-static layer designed to reduce the kind of buildup that leads to head contamination. That's a construction feature of the paper, not a guarantee against ever needing to clean the head — but it's a meaningful factor in how often the issue comes up.
Does using Durico paper instead of Sony OEM void my printer's warranty?
Durico paper is manufactured to the same roll geometry and thermal sensitivity spec as the Sony OEM media it replaces, so it's built to run in the printer as designed. Cleaning-head maintenance itself is a routine, manufacturer-documented procedure independent of which compatible paper brand you're running.
What if I clean the head and the prints are still streaky or faint?
If a cleaning cycle doesn't resolve it, the cause may be elsewhere — paper loaded incorrectly, a worn platen roller, or a printer setting. Our guide to blank, faint, and streaky ultrasound prints covers the next troubleshooting steps.
My printer keeps jamming near the tray — is that related to a dirty head?
Not usually — jams are typically a paper-path or roller issue rather than a head-contamination issue. See our paper jam troubleshooting guide for that specific symptom.
Where can I buy Durico paper for my Sony UP-D898MD or UP-X898MD?
Precision Imaging Supply stocks Durico 1100S, 1100HG, and 1100HD in 5-roll and 10-roll cases, ready to ship. Start with Durico 1100S for standard clinical use.
Keep the Head Clean, Keep the Prints Consistent
A two-minute cleaning-sheet cycle solves most streaky or faint print issues on the UP-D898MD and UP-X898MD — no service call required. Pairing that routine maintenance with Durico 1100S, 1100HG, or 1100HD keeps your fleet running cleaner for longer, at roughly 25–30% less than Sony OEM media.
Shop Durico 1100S Standard Ultrasound Thermal Paper →
About Morgan Hayes
Morgan Hayes is the imaging supply specialist behind Precision Imaging Supply's resource center. With over a decade tracking the medical thermal printing market, Morgan helps imaging departments, OB/GYN clinics, veterinary practices, and independent ultrasound centers navigate the maze of printer-and-paper compatibility — including the Durico drop-in alternatives that save practices 30–50% versus OEM Sony media without compromising print quality.