Photocopier adjustment presets

[N Cook]

At some time in the next year, machine specific toner for this machine,
Toshiba BD5120 will no longer be available. Considering I have a working one
plus a couple of boxes of electro-mechanical spares from another working one
its annoying having to chuck both. I will try different toners, requiring
adjusting operational criteria on the machine.
Can anyone identify any of the following preset functions.
Through the front pannel , unclipped to change toner etc so no panels need
removing, so almost owner adjustments but details not in the owner's manual
2 rows of 4 presets, 8 in all, all attached to monostable ICs
one row marked "A" the other "M"
then 5 markings 1/1, 1.01/1, E,R,COL
apparently applying to the 4 presets in each row.

On interior enclosed boards but details only taken from the
boxes of spare boards so a disconnected jumble, not from the working
machine.

On the corona and transfer, high voltage generator board, 3 presets

2 presets and a 3 way DIP switch on board marked "ADFC"
2 presets on "THC" board

On the main logic board with EPROM just a 3 way DIP switch.

Eventually I may have to mark, then suck-it-and-see twiddling the presets,
with different toners but any hints/tips ? Getting a technical manual for
the machine is not going to help much on this one

 

[webpa]

At some time in the next year, machine specific toner for this machine,
Toshiba BD5120 will no longer be available. Considering I have a working one
plus a couple of boxes of electro-mechanical spares from another working one
its annoying having to chuck both. I will try different toners, requiring
adjusting operational criteria on the machine.
Can anyone identify any of the following preset functions.
Through the front pannel , unclipped to change toner etc so no panels need
removing, so almost owner adjustments but details not in the owner's manual
2 rows of 4 presets, 8 in all, all attached to monostable ICs
one row marked "A" the other "M"
then 5 markings 1/1, 1.01/1, E,R,COL
apparently applying to the 4 presets in each row.

On interior enclosed boards but details only taken from the
boxes of spare boards so a disconnected jumble, not from the working
machine.

On the corona and transfer, high voltage generator board, 3 presets

2 presets and a 3 way DIP switch on board marked "ADFC"
2 presets on "THC" board

On the main logic board with EPROM just a 3 way DIP switch.

Eventually I may have to mark, then suck-it-and-see twiddling the presets,
with different toners but any hints/tips ? Getting a technical manual for
the machine is not going to help much on this one

You seem to be considering substituting a physically different
toner/drum/etc cartridge. Why?

Toner can be bought in bulk for most machines...along with instructions
for re-filling the cartridge and refurbishing (within limits) the drum
(if it is in the cartridge). (ex:
http://www.compustuff-inc.com/toner.htm) This would not require any
blind adjustments to the works.

 

[N Cook]

You seem to be considering substituting a physically different
toner/drum/etc cartridge. Why?

Toner can be bought in bulk for most machines...along with instructions
for re-filling the cartridge and refurbishing (within limits) the drum
(if it is in the cartridge). (ex:
http://www.compustuff-inc.com/toner.htm) This would not require any
blind adjustments to the works.

It would seem so because these sites mention "photocopier" toner but they're
all geared up for laser printers and barely mention of any photocopiers
unless they are the combined printer/fax/copier sort.
It would be nice if a toner source company like Katun published a
compatability list of their bulk toner types. But of course that is
commercially sensitive info, so the "value added" companies down line can
decant into the machine specific bottles.
I've plenty of these bottles which incidently also show that this particular
machine must be coming to the end of its supported life. The bottles must be
recycled because the archimedian screws are getting more and more prone to
jamming presumably due to wear in all the previous machines.
I've decided to get a technical manual anyway to be sure what preset does
what but there is a complete lack of info toner types as far as I can find
so it will still be suck-it-and-see what happens.
I cannot even find a way of testing toner to determine its characteristics
outside of a machine, eg dustiness, oiliness/silicones (affects the amount
of corona/transfer voltage required , as far as i know only added to
makesure the fuser and associated pressure roller stay clean ), fuser/melt
temperature ,conductivity (for triggering refil and full surplus bottle
switches) - those are just my guesses for some of the characteristics.
anyone know of how to do such testing especially
dustiness/oiliness/claginess test, I don't even know what its called - If
you blow on a small pile of such toner it will blow away but not as easily
as if it was totally dry dust of the same particle sizes.

 

[[email protected]]

At some time in the next year, machine specific toner for this machine,
Toshiba BD5120 will no longer be available. Considering I have a working one
plus a couple of boxes of electro-mechanical spares from another working one
its annoying having to chuck both. I will try different toners, requiring
adjusting operational criteria on the machine.
Can anyone identify any of the following preset functions.
Through the front pannel , unclipped to change toner etc so no panels need
removing, so almost owner adjustments but details not in the owner's manual
2 rows of 4 presets, 8 in all, all attached to monostable ICs
one row marked "A" the other "M"
then 5 markings 1/1, 1.01/1, E,R,COL
apparently applying to the 4 presets in each row.

On interior enclosed boards but details only taken from the
boxes of spare boards so a disconnected jumble, not from the working
machine.

On the corona and transfer, high voltage generator board, 3 presets

2 presets and a 3 way DIP switch on board marked "ADFC"
2 presets on "THC" board

On the main logic board with EPROM just a 3 way DIP switch.

Eventually I may have to mark, then suck-it-and-see twiddling the presets,
with different toners but any hints/tips ? Getting a technical manual for
the machine is not going to help much on this one

Twiddling presets when you dont know what youre doing is not smart. Nor
does it have much to do with toner types. Toner can be hot fuse or cold
fuse, with most machines thus most toners being hot fuse. Just try
another toner, or more sensibly buy the right toner from a replacement
supplier. There are various companies that supply toners etc, and they
dont take the slightest notice of manufaturer EOL dates.

As for all this 'end of supported life' twaddle I wouldnt take too much
notice. There are always companies around wiling to repair used
machines, and availability of parts from sources other than the mfr
usually goes on for a good decade after their so-called EOL dates. And
you'll probably find them far cheaper than Tosh.


NT