Copier Tip Archives
For more current information, use the Bulletin Boards.
BD SERIES DOC FEEDERS
GENERAL
Loosen tension on tension springs 2 nuts. You can extend springs with staples. These
adjustments will work provided the bearings are not shot on the one way bearings.
MULTIFEED
Inspect one way bearings with gears. See if they are turning the sep. tires., may be
slipping ( Install new one ways ) Also.. emery cloth shafts to help bearing grab &
don't use oil. Part # 4408326270 gear-08-15 o/w new style smallgear w/1 way bearing Part #
4407923610 gear-08-40-o/w no change Big gear w/1 way bearing
NEWER MODELS
If you get a "blown" temperature fuse in a newer model Panasonic or Toshiba
copier, replace the fuse BUT DON'T THROW THE OLD ONE AWAY! Take the "Blown" fuse
home, put it in your freezer overnight, and it will be as good as new. They are fully
resettable, but need a jolt of cold to do it.
OLDER MODELS
Just thought Id add a tip on registration problems on older Toshiba copiers!Copiers from
the 5110 to the 8510 all used stepping motor for scanning.Problem is that the rubber
gromet that connects the motor to the scan assembly uses 4 allen screw to hold
together.They become loose and slippage occurs causing the image to shift but no service
code is indicated!Just tighten the allen screws and drop some locktight on them and POOF
the problem is cured!
9 SERIES
CLOSE FRONT DOOR MESSAGE
This is not normally anything to do with the door switches and is more likely to be the
fuse on the power board or the fuser lamp/thermistor or thermo fuse, as they are all in
circuit.
A problem the Toshiba 9000 series have with a falling paper deck can be repaired by replacing capacitor number 13 and 14 on the power supply board(PWB-F-PWR-...) located on lower back right of the machine. These capacitors are locally available.
1210
C8 UNLISTED CODE
Toshiba
1210 C8 code indicates the fusing thermistor is opening. Not in the manual.
1210/2810
C-7 CODE
The correct location of the C-7 reset fuse for these models: PCB at left end of op panel
assembly Has two 120 ohm "fuses" on it. The one on the left end is blown at
initial set-up. The other one (not on left edge) is the correct fuse to replace. OEM P/N
4400-539810. Or just buy 120 ohm 1/4 watt resistors if not in a hurry.
1340,1350,1360,1370.
If
you have blank copies on these machines and cannot find out why, try going into 08 service
mode and changing number 46 to 2 and then see if the copier works. If so, you have a
bad automatic exposure sensor. These copiers have an exposure lamp detection circuit
that cuts out the charge corona unit and a bad auto exp sensor will cause blank copies.
1350
Exposure Cable
I
recently ran into a machine that had a 1/8th” black strip all the way
across the 8 ½” side of the paper, all the rest was blank, and I noticed that the
copy lamp was not lighting. Typically
no copy lamp means all black copies. The problem was a bad copy lamp wire harness
1550
ADF bunch feeding
Throw away the book for this one! Go directly to, as we old Mita techs call it, the
green kick back roller assembly. Get
your pliers and screwdriver. Remove the entire bracket from the ADF frame.
With your pliers, slowly "form" the two wings that attach it to the frame BACK
towards the exit side of the copier. I moved mine about 1/6 of an inch. This
will move the Green roller closer to the Primary feed roller, allowing a tighter fit, and
better "kick back" of excess sheets. It worked perfectly! Good
luck.
The main purpose of stripping the clutches is they bind and that is what causes the double feed the tires do not stop turning and force the paper through the separators, so you clean and loose the shims to give a bit of free play
BD 1550/ADF
DOUBLE
FEEDING
This
blessed machine is the bane of my life, Toshiba sent out so many bulletins on this machine
its not funny. The feed, or rather mis-feed's can be cured this way. 1. Remove the feed
clutches from the base strip them polishing the large metal washer to remove corrosion
from it, when you rebuild it accidentally loose the shims (yes Tosh told us this).2. Throw
away current stock of feed rollers and use the roller kit 4402474110 these are the same
tires that are fitted to the LCC on the 2060/2860. 3.
The paper turn guide rub the ribs with emery paper to remove burr's from the guide as the
paper wears them and cause jams. 4. the reg
switch enlarge the hole this protrudes through as there have been instances of the switch
fouling on the sides of it. 5. the small
plate on the input guide to the drum the one the paper passes under, remove one screw and
use it as a steel rule keep in tool bag, it arches out to the reg roller spiking the
logic. 6. the lead that connects to the input
guide remove it and tie back out of the way. 7. the side guides in the cassette screw them
down so the customer cannot move them. again this will cause jams if to tight and too
loose.
2550/3550/4550/Others
Developer dumping from under Mag Roller
Have found that the cause for this is the Mylar located under the Mag Rollerassembly and
tack stripped there. The problem occurs when techs inadvertently turn the Mag Roller
backwards when PM'ing machine and developer gets underneath the rear side of the mylar
(the edge that is inside the unit). This developer buildup causes the mylar to be pushed
up into the Mag Roller and narrowing the gap for returning developer to get back into the
unit and dumping out the front instead. I have removed this mylar (and the rubber strip on
top of it) with seemingly no effect on copy quality nor anything else and just leave them
off from that point on.
2810
EXPOSURE LAMP FLICKERING
This problem will usually be intermittent and get worse. You may see the exsposure lamp
flickering. You must remove the power supply pwb from the back of the machine and resolder
allpins on back of connector J21. There is a bulletin out on this.
2810
1210 TONER
By simpling changing the toner drive coupler you can use less
expensive and more really available Toshiba toner in the Lanier 6112/6110. Use
Toshiba Part no. 4400-541790 Gear 21-0.8
3550
DEVELOPER DUMPING
There is another reason that we have discovered for developer dumping in Toshiba 3550 and
similar machines. All of these machines ground the drum through a spring loaded
connection near the top of the cleaner section. This device is also used to take
grid, transfer, and separation voltage readings. The black plastic piece that the
spring is attached to will sometimes crack, allowing the ground connection to become
intermittent. If this occurs, the developer will dump into the lower section of the copier
and into the waste toner bottle.
4550
FUSER DRIVE
I
had a broken fuser drive gear in a Toshiba 4550 copier #4402-074980 K-Gear24-8. I was 75
miles away from my shop, so I found that a Sharp 8800 gear #CGERHO564FC01 was the same
size except for the hole in the center, so I borrowed the school's drill press and drilled
out the Sharp gear bronze bushing. This emergency cure got my Toshiba up and running
while I order in the correct gear.
3550/4550
BLURRED COPIES
Blurred copies resulting from vibration in the developer unit is caused by improper
developer blade gap. The gap should be set to .45mm with no developer in the unit. This
problem is associated with all A-2 Toshiba classified machines.
35/45 CPM Copiers
BD 1550/ADF
DOUBLE FEEDING
Many causes at work here, however these tips have helped us a lot :
Install the new, modified (Toshiba) DFP Roller Assy. This may slow down
problem but will probably not remedy problem permanently. We have installed a
piece of rubber to the entrance plate (metal) of the ADF feed throat. This
plate is lock-tited from the factory but can be adjusted up and down to narrow the gap
accordingly to keep the amount of paper minimized that actually gets into the feed throat
in
the first place. Once a stack of paper gets into the feed throat, the chances of
the DFP roller assembly stopping them is nil, as gravity has taken over and the DFP
roller is too far down into the feed throat to have a chance to stop the paper. If
the DFP roller had been better located at the nip of the rollers, it would have had a
good chance of stopping the paper.
1550
Several
of these machines that I have looked at have had registration problems. To cure this just take the back cover (lower) off
and cut the earth wire from the trn/sep bed. This works in 9/10 of m/c's.
BD-1710
REGISTRATION VARIATION
Symptom is the lead edge moves further down the page with each copy in
a multiple run. Seems to be residual magnetism within the reg mag
clutch. Whacking them on hard ground seems to help if you don't break
off the white connector on them. P/N 4402-817240. May also want to try
to demagnetize the lower reg roller too (dropping your screwdriver tends
to demag it but be more careful with the roller).
1710/2310
THERMISTOR
Thermistor has been updated to run the fuser at a lower temperature
(about 20 degrees C lower). This is to help extend the lifespans of the
parts within the fuser, which are known for premature failure. May also
reduce tendancy to melt down. Thermister P/N 4400-968820. Also need new
style bracket P/N 4402-810660. Also requires M3 screw of specific length
that you probably have in your screw collection ( don't have P/N).
Most newer style Toshibas have been mod'd in this way, but some have
EPROM mods to make temp adjustable or extend adjustment range.
BD-2230 AND FAMILY
BLANK COPIES
Blank or faint copies due to little or no transfer. Try turning the transfer adjustment
potentiometer back & forth to clean its contact. May also apply to bias or separation
symptoms & their pots.
BD-2810
COPY QUALITY
Intermittent light copies. There are two big resistors on the main board (back of machine)
that have loose solder joints.
CLEANING UNIT BINDING
The cooling fan is driven off the main motor through a coupling. The
prongs on the coupling have been known to break. If this happens, the
fan will still turn, BUT it will not turn at full speed. This will
cause toner in the cleaning unit to harden and bind up the unit.
C-7 CODES
If after repairing the bad part in the fuser you still have a C-7 code check the fuse on
the exposure control fuse. There are two fuses on the board-one is the unpacking fuse the
other is the C-7 fuse. The exposure control board is located under the control panel on
the left.( It's really a small resistor in a plug jack)
WRINKLED COPIES
If you experience persistant wrinkled copies even after you have cleaned the fuser guide
plate, check the condition of the o-zone filter. It sits right above the fuser section and
if it is deteriorated or missing the suction fan can actually lift the paper as it enters
the fuser causing wrinkles in the copies.
BD-3020
COPY QUALITY
problem; Deletions,looks like round white dots the size of a nickle,spaced every 2"
in transport direction. (SKY SHOT test)
solution: remove rubber strip just below mag roller.
TOSHIBA 3110
PAPER JAMS
Machine indicates misfeed but no paper is present is the path. Try replacing thermister
and thermal fuse.
TOSHIBA 3301/4121
3301 TONER DISPENSING ROLLER
The best materials to rebuild these has been found to be Wilhold brand
medium size foam hair rollers. Come in pink or black. Goody brand
mediums are too big and smalls too small. Use silicone adhesive on the
shaft and spin rollers into position. Support by ends of roller while
curing.
COPY QUALITY
Smudged copies, poor cq. Must replace the recovery blade when changing the drum and drum
blade.
TOSHIBA 3810 / 1310
PAPER FEED
Problem: Paper feed problems, either not picking up paper, or jams inside machine.
Solution: Remove, clean and relube paper pickup clutch spring.
Toshiba
4010
Below is a copy of your tip for the Toshiba Dev mylar.
While I realize you may not have had problems with your machine, personally
I have found they run dirty, especially the 4010. Why that one - I don’t know.
Personally, what I tend to do is just cut out the portion that is worn until such time as
I get a new one and time to fit it usually at the next dev change.
TOSHIBA 5110 / 5610
JITTERS
Problem: Occasionally you get jittery copies, and when you do, you can actually hear a
jitter.
Cause: Drum cleaning blade weight is loose. Check that screws that hold the weight to the
bracket are tight.
TOSHIBA 5540/6550
INTERMITTENT JAMMING
The customer complains that the "close front door" signal is displayed. After a
short period of time the machine will work again. Replace the thermal fuse.
Toshiba 5540 Lanier 6755
The
lcc has no lift. But you can hear the motor buzzing away. Take out the lift motor the
drive pulley will just pull off.
Take a nasty bastard file and score the shaft and replace the
pulley (you may have to tap it on) and away you go.
Toshiba 7720
Intermitent call service codes CP error. The rubber coating around the main motor is
coming loose. You can access this in the optics cavity under the two metal plates on
exit side. Remove the cracked and deteriorating rubber that is around the motor.
Have had no problems since.
TOSHIBA 7910
DRUM WON'T TURN
Optics cavity exhaust fan is also main drive. Solonoid on it goes bad. Test it by
manually pressing it closed on the slip ratchet it actuates.
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