Friday, March 25, 2011

Solution: Windows Live Error hr:0x80070643

This problems seems to be something to do with (a) not having the messenger.msi file in the Installer folder and (b) perhaps not updating Windows Messenger first.


This combination seem to fix the problem:

1. Make sure that there is a messenger.msi file in the C:\WINDOWS\Installer folder.
2. If it is not present use the 'Search' function of Windows by tapping F3 and search for the file on your Windows folder.
3. Copy the file into the C:\WINDOWS\Installer folder.
4. Fire up Windows Messenger and log in.
5. If there is a new version available, a message will prompt. Follow the onscreen instruction. 

Friday, March 11, 2011

How to Reset Canon MP760 - Waste Ink Tank Reset Procedure

Problem with your Canon MP760 Waste Ink Tank? Just follow these steps on how to reset it.

1) Press the following keys in sequence: Copy-Menu-Scan-Copy-Scan.
The display will say:
SERVICE MODE
#1 SSSW

2) Press the V key six times.
The display will say:
SERVICE MODE
#7 PRINTER

3) Press OK.
The display will say:
#7 PRINTER
#1 SSSW

4) Press the V key four times.
The display will say:
#7 PRINTER
#5 INK ABS CAPA

5) Press OK.
The display will say:
SUCTION
XX (where XX is how full the waste ink tank is as an integer percentage)

6) Change the XX to 0 by hitting the <> keys as many times as necessary (if you are closer to 99 than 0 it is better to hit the > key until it wraps around to 0).
The display will say:
SUCTION
0

7) Press OK.
The display will momentarily say:
SUCTION
DATA ENTRY OK
and then will quickly change to:
#7 PRINTER
#6 CDR ADJUST

8) Press the Stop/Reset button

And the printer is back to normal.

Thursday, March 10, 2011

How to Reset Canon MP780 - Waste Ink Tank Reset Procedure

1) Press the following keys in sequence: Copy-Menu-Scan-Copy-Scan.
The display will say:
SERVICE MODE
#1 SSSW

2) Press the > key (also labeled +) six times.
The display will say:
SERVICE MODE
#7 PRINTER

3) Press OK.
The display will say:
#7 PRINTER
#1 SSSW

4) Press the > key (also labeled +) four times.
The display will say:
#7 PRINTER
#5 INK ABS CAPA

5) Press OK.
The display will say:
SUCTION
XX (where XX is how full the waste ink tank is as an integer percentage)

6) Change the XX to 0 by entering 0.
The display will say:
SUCTION
0

7) Press OK.
The display will momentarily say:
SUCTION
DATA ENTRY OK
and then will quickly change to:
#7 PRINTER
#6 CDR ADJUST

8) Press the Stop/Reset button

And the printer is back to normal.

Wednesday, March 9, 2011

How to Disassemble Canon MP780/MP760 Printer to replace the Waste Ink Pads

There are four different types of screws and you want to get them back where they came from. To help you keep the screws straight, I have labeled the photographs with letters corresponding to each screw type. Here are the screw types:

A: medium length plastic screw.
B: short machine screw with integrated washer.
C: longer plastic screw with integrated washer.
D: shorter plastic screw.

Before you attempt this process, you should remove the cartridges, do a deep head cleaning followed by a nozzle check and repeat until nothing prints. Then remove the print head and unplug the printer with the carriage still in the center of the printer.

You will need a medium Phillips screwdriver with a long shaft (at least five inches long).

Start by removing the two side panels. First remove these two screws from the front of the printer:

Canon MP 780 / MP 760 Disassembly Guide

Remove these four screws from the rear of the printer:


Now pry off the back of each side panel over the two posts that the rear screws were removed from, pull each panel away from the printer and forward to release it from the printer. Be very careful of the timing wheel exposed on the left side of the printer during subsequent handling. You don't want to get it dirty or damage it.

Next you have to remove the scanner unit. This is the most difficult part of this job. Remove all the wires and cables that pass from the scanner along the right hand hinge point being very careful to note where each cable goes. Some of the ribbon cables are held tightly in their connectors with a locking frame. You need to pull these out (but not off) to release those ribbon cables and of course you have to press the frames back in after you carefully return the cables to their proper positions. You also have to remove a couple plastic retainers. Look carefully at how they snap into place so that you can unsnap them without breaking them. It would be a good idea to take pictures and notes so that you can get it back together again. Here are pictures of this area for the MP760 (the MP780 is slightly different):


After all the cables and wires are off the connectors (and the grounding wires unscrewed), gently pull the wires up through their feed holes up to the top of the printer.

If you are working on an MP780, you can remove the upper part of the scanner. Open the cover until it is pointing almost straight up and then pull it out from the bottom scanner. You will have to wiggle it to get it free. Be careful of the wires on the right side. Bypass this step if you are working on an MP760.

Next you will have to remove the two grey guides shown at the top of the first picture on this post. You do this by holding the scanner part way up so that the handle that you use to raise and lower the scanner is somewhat forward. Pull down on the top center of the guide and after the semi-circular protrusion is below its lock, slide the guide forward and remove it. Repeat for the other guide. Pay close attention to how these guides are removed so that you can get them back in place and be very careful that you don't break the semi-circular protrusion. It breaks very easily and if it does break, the guides will not stay in place unless you use an adhesive (tape or glue).

Now you need to remove the bottom portion of the scanner from the printer (or the entire scanner if you have an MP760). Do this by opening it until it is straight up and lift it right out of its hinge points.

Now with the scanner out of the way, you can remove four screws that hold the top of the printer in place. These four screws are located in approximately the four corners of the printer but you will have to raise the handle for the scanner to get to the one in the right front corner. Here are pictures of the screws in the four corners:

Left rear:



Right rear:



Left front (get the correct screw, it's the one in front):



And finally right front (you won't see this unless you raise the scanner handle):



Make sure the handle for lifting the scanner (which has been removed) is latched down and simply lift the top of the printer away.

Now you can see much of the printer mechanism. There is a total of seven or eight screws that need to be removed. (Disregard the sight of cables going everywhere, these pictures were taken from one of the printers that was broken and I was not concerned about restoring it.)

Two screws on the left side of the printer:



Two or three screws from the right rear of the printer (the one in the middle is higher than the other two and don't remove the two screws holding ground wires):



And three more screws near the right center of the printer:



Before you can lift the printer mechanism and the electronics board away from the base, you need to disconnect the wires that go to the left side of the electronics board (near the front of the printer) that are not colored orange or yellow. On the MP780 there are two pairs of wires and on the MP760 there is just one. The picture above shows these two wire pairs for the MP780 disconnected. These wires go along the underside of the printer to the other side.

Slide the carriage as far right as it will go.

Before you remove the printer mechanism from its base, you should observe the positions of a couple of white cams as seen circled in yellow in this picture:



Don't worry if they come loose while you are removing the printer mechanism, just remember to put them back where they belong when re-assembling. Here is a closeup of the one on the right:



Lift the mechanism up by the metal bar that goes across the top of the printer. As you first start to lift it, some orange cables near the front need to be unpositioned from their plastic guides in the base. Note how they are positioned so that you can get them back in the same orientation. This picture shows how these orange cables are positioned and how you need to return them when you are putting the printer back together:



When you get the printer mechanism removed, this is what you'll see:



Now you can easily remove the waste ink pads and clean up all the residual ink from the various plastic parts. Thoroughly dry it before installing new pads.

You may also want to remove and wash the thin black sponge unit that runs the width of the printer. Also clean the wiper blades and the two purge pads. When you put them back, the notch goes in the left rear corner.

Reassemble the printer by reversing all the steps. To help guide the printer into the base, look at the back of the printer and line up the door into the base unit. Make sure those two white tabs are inserted where they belong and are engaging the proper posts and make sure the orange wires make their way across their restraining tabs. Make sure you plug in the wires that run along the base of the printer.

When putting the printer top on the printer, look at the back again and line up the door into the printer top.

Tuesday, March 8, 2011

How To Repair Canon Pixma MP780 / MP760 / MP730 - Clogged Purge Unit


1) Open the cover to get at the ink tanks and when the carriage comes to the center pull the power plug on the printer, then move the printhead more to the left.

2) Have a syringe ready or an eye dropper with some Windex-Original with Amomnia D.

Use a flash light to see into the right side of the open area where you can reach the ink Caps. These are the small rectangular suction units where the printhead sets all the way to the right. When the carriage is Parked, these ink caps come up and cover the inkjet nozzles. There is one on the left for the black and one on the right for the color.

3) Add several drops of Windex to each cap until they appear flooded.

The windex should begin to absorb through the Caps and down through the purge tubes to the waste ink pads. If it all goes in, add a couple of more drops.

4) Plug the power back in and turn the printer on.

The carriage will move through a couple of cycles and you should hear the purge unit doing a couple of cycles. One is for the black ink and the other one is for all the other colors.

5) Close the cover and let the head do a parking cycle. This takes 55 seconds.

6) Once it is parked turn the printer off and then on again with the power button. The power on cycle will force the printer to do a purge cycle just to test the purge unit. This is all part of the Canon power on Diagnostic routine.

7) When it is finished and comes ready, raise the cover again and use your light to see if all the Windex is gone from the ink Caps. If you can reach the ink caps, add some more windex and repeat the cycle by closing the cover and cycling the power.

8) Keep doing this if the ink Caps appear to be getting cleaner. It could also break up any clog that might be there, but you may have to repeat the process several times.

If that doesn't clear up the problem, maybe the clog is not actually in the purge pump but rather in the tube coming from the bottom of the purge unit to the entrance of the peristaltic pump. You cannot unclog this tubing from the top of the purge unit. You will need to take apart the printer and get to the other end of the same tubing and squirt some Windex into it. The process for dismantiling the printer is the same as for changing the waste ink absorber pads.