You should replace the toner cartridges installed in your Gestetner DSc-435 Laser Printer when any of the listed and explained indications appears.

The [Add Toner] indicator appears – The [Add Toner] indicator illustrates six black dots in a pyramidal order with an arrow pointing towards the dots. This indicator will appear when the level of remaining toner drops under 10%. You should install a new toner cartridge(s) soon after the initial appearance of the currently described indication. Otherwise, all print/copy operations will be disabled due to an insufficient toner level(s).

‘’No toner: [Color], [Color]’’ – The indicated toner cartridges have reached the end of their useful life, which has caused a non-operational mode. New toner cartridges of the specified colors must be installed.

‘’ [Color], [Color] Toner is almost empty’’ - The indicated toner cartridges are nearly empty. You should purchase new toner cartridges of the specified colors.

You should always keep a spare set of toner cartridges for your Gestetner DSc-435 Laser Printer in stock, but please store these consumable components in a cool, dry place free from direct sunlight. You can find instructions on how to install a new toner cartridge(s) in your Gestetner DSc-435 Laser Printer below.

Initially, you must open the upper right cover of your Gestetner DSc-435 Laser Printer, and then detach the hook from the top side of the exhausted toner cartridge. After that, you must pull the exhausted toner cartridge straight up to remove it from the laser printer, and then unpack the new toner cartridge. Please do not shake the used toner cartridges, in order to be avoided toner scattering. Now, you must rock the new toner cartridge back and forth 7-8 times to redistribute the toner, and then align the new toner cartridge with the corresponding slot, so that the metal contact area of the new component is facing towards the main unit. Finally, you must push the new toner cartridge down into the corresponding slot until the hook snaps on the metal contact area, and then close the upper right cover of your Gestetner DSc-435 Laser Printer.