Honeywell PC42t “Ribbon Out” After Reload — sensor, media mode & path fixes
Joe B.
Expert ★★★★★ 27,853 satisfied customers
Specialities: Honeywell desktop printers, PC42t/PC43t, label calibration, ribbon sensors, ZPL/EPL/Direct Protocol
Honeywell PC42t “Ribbon Out” after reload — ribbon sensor, ink-out orientation, thermal transfer setup
Technician
A few quick details so we aim the fix: are you using thermal transfer labels (with ribbon) or direct thermal labels? Did the Ribbon Out start right after you reloaded a new ribbon roll, changed label size, or updated driver/settings on the host?
Technician
• Ribbon loaded the wrong way (PC42t requires ink-out ribbon, dull/ink side facing the labels).
• Ribbon not tight on the take-up core, so the ribbon sensor sees gaps and thinks it’s empty.
• Printer is still configured for Direct Thermal (no ribbon) instead of Thermal Transfer in settings/driver.
• Contaminated or misaligned ribbon-out sensor (or using ribbon narrower than the sensor path).
Let’s walk through a clean reload and sensor check. It’s quick and usually clears the error.
Technician
1) Power the printer OFF.
2) Open the cover and ribbon mechanism.
3) On the supply roll (rear), the ribbon must unwind from the bottom, towards the front. On the take-up core (front), the ribbon wraps onto it from the printhead side.
4) The dull side (inked side) must face the labels/printhead; shiny side faces away. The PC42t supports only ink-out ribbons — ink-in types will trigger constant Ribbon Out / poor print.
5) Turn the side slack wheel a few times so the ribbon is flat and snug across the printhead with no wrinkles.
A loose or reversed ribbon is the #1 reason for Honeywell PC42t ribbon out after reload.
Technician
Step 2 — Set PC42t to Thermal Transfer (not Direct Thermal)
• In your driver, Honeywell PrintSet, or printer web page (if networked), verify:
– Print Method: Thermal Transfer.
– Media Type: Gap/black mark/continuous correctly set for your labels.
• If the printer is left on Direct Thermal while ribbon is installed, or vice versa, you’ll get false Ribbon Out / media errors.
• After applying changes, reboot the printer and press/hold the Feed/Print button to run a short testfeed and let it recalibrate.
Tell me if “Ribbon Out” appears instantly at power-on or only when you try to print — that distinction matters.
Technician
The ribbon out sensor is an optical sensor that looks through the film near the take-up side. Common triggers for false “Ribbon Out after replacement” include:
• The ribbon is too narrow or not centered so the sensor looks through clear film/air.
• Dust, glue, or ink buildup on the sensor window.
• Slack between supply and take-up, so the sensor sees shiny gaps.
What to do:
1) Make sure the ribbon and take-up core are centered between the guides and span the sensor zone.
2) Tighten via the slack wheel until the ribbon is smooth.
3) Use a soft, lint-free cloth to gently wipe dust from the visible sensor area if accessible (no liquids directly into the mechanism).
4) Close the mechanism firmly until both latches click; an unlatched head can mimic a ribbon/media error on PC42t printers.
Technician
Step 4 — Calibrate stock & verify host settings
• With media and ribbon loaded correctly and LED green, press and hold the Feed/Print button until the printer feeds and prints a configuration/test label. This:
– calibrates the media gap / black mark sensor,
– confirms the PC42t sees both media and ribbon during motion.
• In your label software/driver (ZPL/ZSim, EPL/ESim, or Direct Protocol):
– match label size, print method = Thermal Transfer, and media type to what’s in the printer;
– avoid host commands that override to Direct Thermal or disable ribbon sensing.
If test labels print fine but production jobs still throw “Ribbon Out”, we’ll look at job commands or firmware next.
Technician
Step 5 — Check print jobs aren’t forcing the wrong mode
• Inspect a sample label file: make sure it’s not sending commands to set direct thermal while you’re using ribbon.
• Confirm you selected the correct PC42t driver and model (not PC42d / direct-thermal only) on all workstations.
• Standardize settings: Thermal Transfer + correct media type on every host to avoid mixed signals that cause intermittent “Ribbon Out” or blank printing.
If you’d like, an Expert can review your ZPL/EPL output in chat and point to the exact line that’s breaking ribbon detection.
Technician
• loaded an ink-out ribbon correctly,
• set Thermal Transfer mode,
• calibrated media,
• matched driver/WMS settings,
and still get Ribbon Out, likely causes are:
• worn or slipping ribbon take-up gears so the sensor never sees movement,
• a failing or contaminated ribbon sensor,
• damaged wiring or board related to the sensor circuit.
Those require guided testing or depot repair. In chat we can help you capture the config label, LED pattern, and behavior to decide if it’s cheaper to repair the PC42t or replace it.
Technician
Quick answer: the accepted fix
Accepted fix for a Honeywell PC42t “Ribbon Out” after reload: confirm an ink-out ribbon is routed correctly and tightened, set the printer and driver to Thermal Transfer, calibrate the labels, and ensure the ribbon fully covers the ribbon sensor. If the error persists with proper media/ribbon, suspect a job forcing Direct Thermal or a failing ribbon sensor / take-up assembly.
Why Honeywell PC42t shows “Ribbon Out” with ribbon loaded
On the PC42t desktop thermal transfer printer, the red LED and Ribbon Out status typically mean the device does not detect opaque ribbon between its sensor and light source. Common reasons include wrong ribbon type (ink-in instead of ink-out), incorrect path over the printhead, ribbon too narrow or off-center, slack on the take-up core, or mismatched print method (Direct Thermal vs Thermal Transfer) settings. Correcting ribbon orientation and enabling thermal transfer mode clears most Honeywell PC42t ribbon out after replacement issues without hardware repair.
How to verify your PC42t “Ribbon Out” fix worked
Use this quick validation sequence:
- LED is solid green with ribbon and labels loaded; no “Ribbon Out” when idle.
- Holding the Feed/Print button prints a test label with good, dark output (proves ribbon is detected and media is calibrated).
- Production labels from your software print without triggering Ribbon Out or blank labels.
- Swapping to a new ribbon of the same spec and following the same procedure works consistently — no re-occurring error.
PC42t ribbon errors — quick troubleshooting tips
Most Honeywell PC42t “Ribbon Out” problems are loading, media mode, or sensor alignment — not dead printers.
• Always confirm you’re using PC42t-compatible ink-out ribbon that matches your label material.
• Standardize a simple reload SOP: correct path, tighten, center, close latches, run a calibration.
• Keep the ribbon sensor area and print mechanism clean to avoid false ribbon-out detection.
• For warehouses with multiple devices, clone known-good PC42t settings (Thermal Transfer, media type, darkness, speed) to cut down on random errors.
Disclaimer: This guide is informational and based on typical Honeywell PC42t behavior. Always follow Honeywell’s official documentation and safety notes. For configuration specific to your environment, consult a verified Expert before making changes.
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FAQ
Why does my Honeywell PC42t say “Ribbon Out” right after I reload?
Most often the ribbon is loaded wrong (not ink-out), left slack, not centered over the sensor, or the printer is still set to Direct Thermal. Correcting these typically clears the Ribbon Out error.
Can I use any ribbon type in the PC42t?
No. The PC42t is designed for ink-out thermal transfer ribbons. Using ink-in or incompatible ribbon can cause constant Ribbon Out alarms and faint/blank printing.
Do I need to recalibrate after every ribbon or label change?
It’s recommended. Running a quick testfeed/calibration after changing ribbon or media lets the PC42t relearn the gap/mark and helps prevent false ribbon and media errors.
When is a “Ribbon Out” likely a hardware fault?
If you’ve verified loading, media mode, calibration, and driver commands, but Ribbon Out persists across different ribbons and PCs, the ribbon sensor, take-up mechanism, or main board may be faulty and should be checked by a technician.
| Symptom | Likely cause | Quick action |
|---|---|---|
| “Ribbon Out” immediately after reload | Ribbon path wrong or ink-in instead of ink-out | Reload with correct ink-out orientation, tighten ribbon, close latches firmly |
| LED green idle, Ribbon Out only on print | Mode mismatch or bad job commands | Set Thermal Transfer mode, calibrate, align driver/WMS settings |
| Intermittent Ribbon Out with narrow ribbon | Ribbon not covering sensor; slack on take-up | Center ribbon, remove slack so sensor always sees film |
| Persistent Ribbon Out with correct setup | Dirty or failing ribbon sensor / mechanics | Clean sensor area; if unresolved, schedule hardware diagnosis |
Step-by-step recap (Honeywell PC42t “Ribbon Out”)
- Power OFF, open cover, and reload an ink-out ribbon exactly as shown in the PC42t guide; tighten it with the slack wheel.
- Confirm labels are loaded correctly and the printhead/ribbon mechanism is fully latched.
- In printer settings/driver, select Thermal Transfer and correct media type and size.
- Power ON and hold the Feed/Print button to calibrate and print a configuration/test label.
- If test labels succeed but host jobs fail, align software commands with PC42t settings; if all fail, have a technician check the ribbon sensor and drive components.
Note for multi-printer & WMS environments
- Standardize a PC42t configuration profile (print method, media, darkness, speed) and deploy it across all workstations.
- When adding new labels or ribbons, test on one printer first to avoid fleet-wide Ribbon Out issues caused by mismatched supplies or templates.
Sources
- Honeywell SPS Support — PC42t red LED & error code explanations
- Honeywell PC42t Desktop Printer User Guide — loading ribbon & media
- Honeywell SPS Support — troubleshooting ribbon errors on desktop printers
Filed under: Paper handling & media (jams/feeds/duplex)
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