En temps normal un Agfa te donne des codes Cxxxxxx et les Minolta des Fxxxx mais passont.
De C0F20 à C0F31 Are all image density sensor problems, having to do with toner developer ratio settings.
En clair la cellule sous le tambour li mal le pavé noir. Si sur ton tambour tu as des trainées (sorte de grosse rayure) noires, il y a de forte chance que ta raclette soit morte. Remplace là.
Si sur ton tambour tu as une sorte de voile gris noir assez uniforme, ton devoleppeur est mort. Tu sais ce qui te reste à faire ? 
 
Si ta machine rajoute non stop il se peut que la concentration de cuve soit faible (peu probable à la mise en route) ou alors elle li mal le pavé noir.
L'idéal pour une première serait d'avoir un tech à tes coté. Par clavier interposé c'est pas du tout facile surtout lorsque l'on n'a pas les bases du métier.
Pour info :
Code Description 
C0000 Main drive problem 
C0010 Main drive problem. Wrong speed 
C0040 Transport fan motor 
C004A Optics fan 
C004b Optics fan at wrong speed 
C004c Cooling fan 
C004d Cooling fan at wrong speed 
C0070 Toner motor 
C0071 Toner motor at wrong speed 
C0072 Sub-hopper toner motor 
C0100 Charge corona winding problem 
C0200 Corona problem 
C0300throughC0374 Problems that occur during service mode input or output tests. Most are not explained 
C0313 Grid 
C031E Scan 
C0400 Exposure lamp 
C0410 Exposure lamp on too long 
C0500 Low fuser temperature 
C0510 Low fuser temperature after warm-up 
C0520 High fuser temperature 
C0522 Fuser thermistor problem 
C0600 Scan problem 
C0601 Scan problem 
C0610 Lens drive problem 
C0620 4th & 5th mirror drive problem 
C0650 Scan sensor or scan problem 
C0660 Scan motor problem 
C06F0 Scan home problem 
C06F2 Scan home problem 
C06F3 Scan problem 
C06F4 Scan problem 
C06F5 Scan problem 
C06F6 Scan problem 
C06F7 Scan problem 
C0900 3rd drawer lift problem 
C0910 2nd drawer lift problem 
C0911 2nd drawer paper down 
C0912 2nd drawer paper down 
C0913 2nd drawer lock 
C0914 2nd drawer lift 
C0916 2nd drawer lock release 
C0920 1st drawer lift 
C0921 1st drawer paper lock 
C0922 1st drawer down 
C0923 1st drawer lock 
C0924 1st drawer lift motor 
C0926 1st drawer lock release 
C0950 4th drawer lift problem 
C0954 4th drawer lift motor 
C0990 Main tray up problem 
C0991 Main tray down 
C0992 Main tray down 
C0993 Main tray up 
C0994 Main tray elevator motor 
C0996 3rd drawer lock release 
C0998 Shift transfer 
C0999 Shift return 
C099A Shift return 
C099b Shift transfer 
C099c Shift motor 
C09C0 Elevator up 
C09C2 Elevator down 
C0b00 Transport drive 
C0b10throughC0b13 Paper clamp unit problems 
C0b30throughC0b31 Paper aligning mechanism problem 
C0b50throughC0b52 Stapler 
C0b60throughC0b64 Sorter bin problems 
C0b70throughC0b71 Puncher 
C0d00 Duplex front/rear edge drive. 
C0d20 Duplex trail gate home position 
C0d50 Duplex drive problem 
C0d51 Duplex drive motor at wrong speed 
C0E00 Erase lamp won't turn on 
C0E01 Erase lamp won't turn off 
C0F02 Original size detect problem 
C0F10 Auto exposure sensor problem 
C0F20throughC0F31 Are all image density sensor problems, having to do with toner developer ratio settings 
C0F79 Paper empty sensor/board problem 
C0FE1throughC0FFF Are all very specific codes having to do with original size sensors 
CO904 3rd drawer lift motor 
E0E20 Image erase lamp won't turn