Question about Samsung SCX 4521F All-In-One Laser Printer

4 Answers

Open Heat Error is displaying onthe LCD Pannel

I am having a problem with Samsung Laser printer SCX-4521F. The display panel is displayed with the alert of " Open Heat Error ". I cant troubleshoot it yet. Could you suggest me what should i do to solve out that problem?

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  • sscarlet81 Nov 14, 2007

    where is the fuser unit in the printer

  • Anonymous Nov 25, 2007

    ravi

  • sachin gaiki May 12, 2008

    i have replace the fuser but i have got same problem

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4 Answers

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CORRECT SUGGESTION, TYPICALLY EITHER LAMP OR THERMOSTAT IS FAULTY

Posted on Sep 16, 2007

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My printer is samsung scx-4521f is not working in its lcd panel its showing open heat error

Posted on Dec 17, 2010

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Fix for open heat error - worked on Samsung scx 4500 printer
The problem may be caused by dirt getting in between the fuser cylinder and heat sensor. Before ordering a new fuser -which can be expensive - and if you have some experience with electronics, you may try the following:
1)Disconnect the power supply from the mains and the printer cable and wait for the printer to cool. Do not just turn the printer off; unplug it.
2) Open the printer. Remove the printing cartridge.
3) Locate the two Phillips screws that hold the fuser cover (the one that has high temperature and/or high voltage warnings printed on it) and remove them with a suitable tool.
4) In the middle of the fuser unit on the interior side there is a heat sensor. It has two wires, that go to a connector on the left of the interior side (with the printer open towards you). The connector sits in a holder. Pull it out of the holder, then disconnect the male from the female. Untangle the sensor's wires from the plastic wings that hold them onto the unit.
5) Now you are ready to remove the heat sensor. It is held in place by one Phillips screw similar to the two you removed from the fuser cover.
6) Having removed the screw, pull the sensor first slightly away from the fuser (to clear the plastic margin on the fuser unit) and then straight up. DO NOT apply force! it should come out very easily.
7) Now you are holding the heat sensor. You are looking at a black square piece of plastic with a hole in the middle (for the screw) out of which on one side come out the two wires ending with a connector, and on the other side, two thin plates laminated together in a soft transparent plastic material (probably silicone rubber). If you look carefully, inbetween the two metal plates sits a very tiny component - the actual semiconductor sensor.
8) On the side of the sensor that when in operation faces the hot fuser cylinder, you will find a layer of solid black residue. Now comes the tricky part: removing the residue. Careless manipulation of the sensor may result in a permanently damaged sensor. You have been warned.
9) Hold the sensor (or place it on an adequate surface, eg rubber) so that no excessive mechanical tension is applied to its active parts (the laminated plates and semiconductor). Scrape the residue off the sensor gently with an object that will not harm the transparent plastic lamination. Do not use anything sharp. The residue should come off very easily. If it doesn't, do not apply excessive force.
10) You are ready to mount the sensor back on the fuser unit. Insert it exactly as you removed it, with the active part down. The wires that go to the connector should come out the side opposite to the connector (if you took notice when you disassembled, they make a u-turn when assembled). You will not be able to mount the sensor if you insert it the other way around.
11) Secure the sensor with its Phillips screw. Do not apply excessive torque.
12) Thread the sensor's wiring through the plastic wings on the fuser body and assemble the connector.
13) Put the cover back on the fuser unit and secure it with its 2 screws.
14) Put the printing cartridge back in place.
15) Close the printer. Connect it to the mains and to the computer. Turn power on.
16) Happy printing.

Posted on Oct 18, 2008

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You have an error in the fuser unit. Try to unplug the power cord, then plug it back in to see if that fixes the problem. If you continue to get the same error, the fuser unit is going to need to be serviced or replaced. Hope this helps. Good luck.

Posted on Jun 27, 2007

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1 Answer

How to solve CRU duse Error in Samsung SCX-4521F Printer?


From Samsung site:

1. Press MENU # 1 9 3 4 in sequence rapidly. The LCD panel should now display TECH.
2. Press MENU, and then press ENTER. The LCD panel will display Tech Mode.
3. Press the left arrow (4. Press ENTER. The operator panel will display [YES].
5. Press ENTER. The toner warning message should be gone.
6. To exit TECH MODE, press MENU # 1 9 3 4 in rapid succession, as if you were dialing a phone number. The operator panel should no longer display TECH.

If problem persists, there may actually be a problem with either the toner cartridge or the SCX-4216F.

Works for SCX-4521F
If this will not make the message dissapear it means that the actual fuse is burned out and need to be replaced ...This is how the fuse looks like
http://www.easterntoner.com/product_info.php?cPath=112&products_id=569&osCsid=9d77e00d739b433bf68d25e0335979f9

Jul 11, 2011 | Office Equipment & Supplies

1 Answer

What is a cru fuse error


The cartridge is running low so the 1 amp fuse in the cartridge blew out, you can replace the cartridge or follow these steps.

1. Press MENU # 1 9 3 4 in sequence rapidly. The LCD panel should now display TECH.
2. Press MENU, and then press ENTER. The LCD panel will display Tech Mode.
3. Press the left arrow (<) button once. The operator panel will display NEW CARTRIDGE.
4. Press ENTER. The operator panel will display [YES].
5. Press ENTER. The toner warning message should be gone.
6. To exit TECH MODE, press MENU # 1 9 3 4 in rapid succession, as if you were dialing a phone number. The operator panel should no longer display TECH.

If problem persists, there may actually be a problem with either the toner cartridge or the SCX-4216F.

Jun 23, 2011 | Samsung SCX 4521F All-In-One Laser Printer

1 Answer

Toner not reset


1. Press MENU # 1 9 3 4 in sequence rapidly. The LCD panel should now display TECH.
2. Press MENU, and then press ENTER. The LCD panel will display Tech Mode.
3. Press the left arrow (<) button once. The operator panel will display NEW CARTRIDGE.
4. Press ENTER. The operator panel will display [YES].
5. Press ENTER. The toner warning message should be gone.
6. To exit TECH MODE, press MENU # 1 9 3 4 in rapid succession, as if you were dialing a phone number. The operator panel should no longer display TECH.

Mar 01, 2011 | Samsung SCX 4521F All-In-One Laser Printer

1 Answer

Display says " scanner locked"


Try unplugging power cord for the unit and then plug it back in. The scanner module is locked and this may reset it.

I hope this helps.

Cindy Wells

Jan 28, 2011 | Samsung SCX 4521F All-In-One Laser Printer

1 Answer

If fuse blown error shows, fuse (1.6mamp) if it replaced to (0.5 amp) then it works.


change the fuse with (0.5 amp).
If it doesn't work try this:
From Samsung site:

1 Press MENU # 1 9 3 4 in sequence rapidly. The LCD panel should now display TECH.
2 Press MENU, and then press ENTER. The LCD panel will display Tech Mode.
3 Press the left arrow (4 Press ENTER. The operator panel will display [YES].
5 Press ENTER. The toner warning message should be gone.
6 To exit TECH MODE, press MENU # 1 9 3 4 in rapid succession, as if you were dialing a phone number. The operator panel should no longer display TECH.


Then you don't need to use fuse after that.....

Sep 27, 2010 | Samsung SCX 4521F All-In-One Laser Printer

1 Answer

PRINTER IS NOT WORKING - DISPLAY SHOWING - OPEN HEAT ERROR


unfortunately this indicate drop wire from heating elelment, return it to place of purchase or find warranty service centre close to your location, albeit i suspect your surname is indian, i do not know your location and cannot therefore send you to closest to you service centre.

Aug 01, 2010 | Samsung SCX 4200 All-In-One Laser Printer

1 Answer

How to operate and fix up the SCX 4521F


1. Press MENU # 1 9 3 4 in sequence rapidly. The LCD panel should now display TECH.
2. Press MENU, and then press ENTER. The LCD panel will display Tech Mode.
3. Press the left arrow (<) button once. The operator panel will display NEW CARTRIDGE.
4. Press ENTER. The operator panel will display [YES].
5. Press ENTER. The toner warning message should be gone.
6. To exit TECH MODE, press MENU # 1 9 3 4 in rapid succession, as if you were dialing a phone number. The operator panel should no longer display TECH.

If problem persists, there may actually be a problem with either the toner cartridge or the SCX-4216F.

Works for SCX-4521F

Jul 02, 2010 | Samsung SCX-4828FN All-In-One Laser...

2 Answers

New cartridge saying low toner


Try these steps:
1. Press MENU # 1 9 3 4 in sequence rapidly. The LCD panel should now display TECH.
2. Press MENU, and then press ENTER. The LCD panel will display Tech Mode.
3. Press the left arrow (<) button once. The operator panel will display NEW CARTRIDGE.
4. Press ENTER. The operator panel will display [YES].
5. Press ENTER. The toner warning message should be gone.
6. To exit TECH MODE, press MENU # 1 9 3 4 in rapid succession, as if you were dialing a phone number. The operator panel should no longer display TECH.
Let me know if it doesn't work as there is another possible solution.

Sep 01, 2009 | Samsung SCX 4521F All-In-One Laser Printer

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