CANON GP335 gives me black copies

[Guest]

CANON GP335 (1).jpgCANON GP335 gives me black copies (not solid black) but when i set brightness 'lighter' i can see the scanned image but all in black.
scanner seems to work thats why i get image but whole page and image are under black 'cover' not solid.
any idea pls?

[canonbundy]

Re: CANON GP335 gives me black copies

Probably the Scan Lamp on its way out.

[Canon.Tech]

Re: CANON GP335 gives me black copies

No it won't be the scan lamp as this would throw an error code.

When was the last service & drum change?

Most likely you need a new drum unit, the cleaning blade fails & creates a black/dark image on prints & copies.

[zoraldinho]

Re: CANON GP335 gives me black copies

Post a sample please.

[Guest]

Re: CANON GP335 gives me black copies

CANON GP335 (1).jpg

[Canon.Tech]

Re: CANON GP335 gives me black copies

Try doing an internal print, a history print for example if that's the same you can rule out the scanner.

If you have another black drum unit, even a worn out one, try that, it looks like from your sample theres a bad drum earth

[Guest]

Re: CANON GP335 gives me black copies

how to make internal test prints since the menu doesn't give me that option. any key combinations or something?

[zoraldinho]

Re: CANON GP335 gives me black copies

First make Initial Checks.With no results start with drum.


Making Initial Checks.pdf

[Guest]

Re: CANON GP335 gives me black copies

i wanna say a huge thnx 2 all of u guys 4 ur support.2morrow i will try all u said and hope 4 my own good 2 get some result.

[Guest]

Re: CANON GP335 gives me black copies

i wanna say thanx to Canon.Tech for his instructions of how to get in service mode
and later to zoraldinho for the initial settings pdf file.

finally 2day i made some adjustments for density, specifically:

According the service manual:
Execute the following underCOPIER>FUNCTION>DENS
in service mode:
1. WHITE-ME
2. PD-DENS
3. PD-ME
4. DZ-DENS
5. DZ-ME
impressively improved result
and then:
COPIER>ADJUST>DENS>DENS-ADJ

internal prints were perfect so the problem must be to scanner section ccd or icboard
im not sure if the problem is hardware or software and if it has gone bcause of the settings or is still 'there' bcause of hardware, possibly is still there but anyway it works.
all of u know better than me.... and let me know what u think