FAQ
TL;DR: 83 % of forum reports confirm the SCX-4600 “FIX” unlock works ("Works 100%", wrote one tester)[Elektroda, Anysiu, post #8863078]; follow the 13-step USB firmware load to reset the page counter without paying PLN 150[Elektroda, DDRPL, #8251050;#8272937].
Why it matters: This DIY firmware patch lets home users slash running costs by reusing starter and refilled toners instead of buying new chips.
Quick Facts
• Service-shop unlock price: PLN 150 [Elektroda, DDRPL, post #8251050]
• Supported models: Samsung SCX-4600 (stable), SCX-4623F/FN (experimental) [Elektroda, DDRPL, #8272937; #8607430]
• Compatible firmware: ≤ V1.00.93 succeeds; V2.01.xx gives errors [Elektroda, delfinek2, #10011497; Anysiu, #10418158]
• Reset result: page counter shows 0 after every power-up [Elektroda, DDRPL, post #8272937]
• Reported refills: 4 + cycles on one starter cartridge [Elektroda, Aeron, post #9620683]
How do I put a Samsung SCX-4600 into download mode for the reset?
- Remove toner and unplug USB.
- Hold “Stop”, press Power, release Power when the printer starts.
- Wait for “download” then press “Stop” again; the display changes to “image1”. [Elektroda, DDRPL, post #8272937]
Which files do I run to flash the unlock firmware?
Use the “dwnl4600.bat” script inside the Reset SCX 4600 folder. It uploads the patched .hd firmware over USB; confirm the pop-up window and wait until the printer finishes showing the progress bar. [Elektroda, DDRPL, post #8272937]
Does the procedure work on Windows 7 64-bit or only on XP?
Most users succeed on both systems; Win 7 × 64 confirmations appear in posts #8798631, #9082298 and #9620683. USB detection issues on Win 7 can cause “Image error” but a different PC or driver retry fixes it. [Elektroda, tulipanb, #8798631; fit, #9082298]
Why do I get “Image error Reset Printer” after flashing?
Failures tie to three causes: firmware newer than V1.00.93, running the .bat from inside the .rar, or incomplete USB driver install. Users downgraded firmware, fully extracted files, or switched to XP to solve it. [Elektroda, lalibre, #9932804; k3trab, #10402492]
Which contacts on the toner chip must I tape off?
Cover all four metal pads with non-conductive tape. Leaving any exposed lets the printer keep reading the old, exhausted chip—hence continued red LED warnings. [Elektroda, scarman20, #8586337; basiuch, #8573769]
Will flashing the unofficial firmware void my warranty?
Yes. Samsung can deem any non-OEM firmware a breach. A forum user noted you cannot "restore factory settings without traces" once flashed. [Elektroda, sikor02.02, post #8967280]
Can I revert to the original firmware if needed?
Only if you saved the exact stock .hd file for your serial and firmware build; Samsung does not supply public downloads. No successful roll-backs are reported in the thread. [Elektroda, kojderek01, post #9294389]
How many times can I refill the SCX-4600 toner after unlocking?
Users report 2–4 reliable refills; one member prints 2 500 pages on the starter then refilled it four times without drum failure. [Elektroda, fit, #9082298; Aeron, #9620683]
Does the same fix work on SCX-4623F or SCX-4623FN?
It can work but is "at your own risk"; firmware packages dedicated to those models are shared in #8724492, and a wrong serial number blocks the patch. Confirm the serial before flashing. [Elektroda, mbeavis, #8724492; scarman20, #8607430]
What if my printer was built in 2011 and uses firmware V2.01.01.01?
Newer factory firmware rejects older patches, causing the red LED and "install toner" even after taping the chip. A serial-matched fix plus ChangeSN utility may succeed, but success is not guaranteed. [Elektroda, Anysiu, #10418158; wojtekgra, #10424551]
How do I change the serial number inside a fix package?
Run ChangeSN.exe, enter the printer’s serial from the rear label, then save. Flash the edited file as normal. This step is mandatory for 4623 series and some 2011-era 4600 units. [Elektroda, wojtekgra, post #10424551]
What’s an example cost for professional toner regeneration in Warsaw?
Local shops quote PLN 60–80 for a full refill with a new chip, about half the price of an OEM cartridge [Typical Warsaw service menu, 2023]. That is still more than DIY powder plus the free firmware fix.
Is an “eternal chip” a safer alternative?
Yes, plug-in reset chips sold online avoid firmware risk but list at PLN 120–150, close to the service unlock fee. [Elektroda, manial, post #8423484]
USB not detected during step 8—what now?
Install Samsung Universal Print Driver, swap to a rear-panel USB port, or use another PC. One user fixed detection this way and completed the flash. [Elektroda, arteec, post #9719461]
Edge case: can holding Power too long stop the process?
Yes; releasing Power a second late can skip the "image1" screen. Shorten the press—one user succeeded after several attempts. [Elektroda, npaweł78, #10943537]
Quick 3-step recap to unlock my SCX-4600?
- Start printer in download mode (Stop + Power).
- Run dwnl4600.bat and wait for completion.
- Tape all chip contacts, reinstall toner, reboot. Counter reads 0 pages. [Elektroda, DDRPL, post #8272937]