TA Triumph-Adler P-C4580DN - Manual (Page 325)

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Troubleshooting
4
Close the cover plate (A) of the staple cartridge holder into its original
position.
5
Re-install the staple cartridge holder. The staple cartridge holder will
click into place when it has been inserted correctly.
6
Close the front cover 1.
Staple cartridge holder B/C
Follow the steps below to remove jammed staples from the optional folding unit.
1
Open the front cover 1 and 2.
2
Remove staple cartridge holder B or C.