Question about OKI B8300 Laser Printer

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Get message: Call for service
Called OKI and the only thing I got out was that it could be Heat Roller Low Temp.

Anyone with any ideas what is wrong with the printer any suggestions or thougths will be welcomed and appriciated.

Thank you in advance.

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H4-01 Heat roller low temp is correct.

You machine has a fuser unit that it uses to bond the toner to the paper, it does this with  a heater lamp heating a set of rollers that the paper passes threw after it has printed.

Your machine monitors this unit to regelate its temp, your machine is sensing via a thermister and thermal fuse the temp of the fuser unit is not hot enough to enable use, this would mean the heater lamp is blown, thermister is faulty or thermal fuse blown 95% chance it's the lamp,

What one normally does is replace fuser assembly with new this is not a user thing it requires a tec, but if your into it, it is the hi voltage hot bit near paper exit.

Posted on Oct 31, 2007


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