Question about Canon CanoScan 8400F Flatbed Scanner

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The adapter beween the power cord and the scanner does not function

There is a break in the adapter transmit power

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TMA doesn't work ;code 22


If 22 is blinking in the Scanner LCDThe Transparent Materials Adapter (TMA) may be attached incorrectly or is broken.
  1. Disconnect the scanner power cord.
  2. Disconnect the TMA cord from the scanner.
  3. Verify there are no bent or broken pins in the cord plug of the TMA. If the cord has bent or broken pins, it will be necessary to contact HP .
  4. Reconnect the TMA cord to the scanner.
  5. Perform a self-test on the TMA. Click here for instructions to do a self-test on the TMA (bps05670) .
  6. Check that the TMA is properly positioned on the scanner glass; either reposition the TMA in the positioning plate or reposition the positioning plate on the scanner glass.
  7. Reconnect the power cord to the scanner.
  8. Attempt to scan.
If 22 "The scanner could not scan" displays on the screen and the Transparent Materials Adapter (TMA) is being used
  1. Disconnect the scanner power cord.
  2. Disconnect the TMA cord from the scanner.
  3. Verify there are no bent or broken pins in the cord plug of the TMA. If the cord has bent or broken pins, it will be necessary to contact HP .
  4. Reconnect the TMA cord to the scanner.
  5. Reconnect the power cord to the scanner.
  6. Perform a self-test on the TMA. Click here for instructions to do a self-test on the TMA (bps05670) .
  7. Attempt to scan.
  8. If the scanner still does not function, follow the instructions for resolving USB initialization and related communication errors (bps03850) .
If 22 "The Scanner could not scan" displays on the screen and the TMA is not being used
  1. Disconnect both the scanner power cord and the USB cable.
  2. Perform a self-test on the scanner if it has a built in self-test. Click here for instructions on performing a scanner self-test (c00030441) .
  3. If the scanner passes the self-test, reconnect the USB cable and attempt to scan. If the scanner fails the self-test, it will be necessary to contact HP.
  4. If the scanner still does not function, follow the instructions for resolving USB initialization and related communication errors (bps03850) .

May 05, 2012 | HP 4570C Flatbed Scanner

1 Answer

My hp scanjet 7800 does not turn on, the adapter has the green led light showing that it is getting power


First get a multimeter and check if the power is going through the adapter to the end of the cord. The AC/DC transformer should output 32V DC at the end going into the scanner. If it has power, then the scanner power switch or the unit itself has failed. If there is no power passing through the cord, then try a new adapter. (You can find some by Googling - I saw some from various vendors.) If it is the scanner itself that has failed, check if it is under warranty.

If it is under warranty, contact HP for service. They may have the power cords as well but I didn't check that far. Otherwise decide if it is worth the service charges.

I hope this helps.

Cindy Wells
(at least I do not think this scanner has a hard power switch on the side of the unit.)

Oct 04, 2011 | HP Scanjet 7800 Pass-Through Scanner

1 Answer

I have a Midland 75-822 that I run off adapter power all the time. How do I turn off the battery save function? With it pulsing the power on and off I miss the firt syllable when someone transmits.


  • Their is no power save mode on this CB in the terms I think your thinking of. There is a high and low power that deals with how much power the CB puts out when transmitting that will make your battery last longer but this would have no bearing on the issue you are having.

  • If you are using a power cord all the time then remove the batteries from the CB until you need them. There are two thumb clips you pull down on and pop the compartments off (one is for rechargeable and one is for regular Alkaline batteries).

  • If the CB is actually powering on and off you have a power feed issue such as a bad connection, a failing power feed socket, a weak inline fuse on the power cord about to blow or something internal is malfunctioning.

  • Hope this helps.

May 26, 2011 | Midland 75-822 40-Channels Handheld CB...

2 Answers

Where do I get a new power cord for the HP 3970 which has been in storage for a while, but I want to begin using it agains, and can't locate the power cord. HP has discontinued this model and nothing on...


The correct part number for just the "brick style" power module (AC Adapter) for an HP Scanjet 3970 is L1970-80003. It is a specific 12V DC 2 Amp module. Today it can be purchased for $18.06 plus shipping from the HP Parts Store. However, if you are looking for just the power cord to your scanner's AC adapter, this brick style power module AC adapter does require a separate standard C13 detachable power cord to the specifications of your area, for instance, in the USA the power cord to connect the scanner to the power module AC adapter is part number 8120-6260, and it is a common power cord for monitors and computers. I learned all this because I had a scanner error message when I tried to use a different power module on the HP Scanjet 3970 when I lost the power cord to the original module. I hope this info helps somebody else, too.

May 24, 2010 | HP ScanJet 3970 Flatbed Scanner

1 Answer

My hp sacanjet 3970 doesn't work


Most likely cause of the "Scanner could not be initialized" error on the HP Scanjet 3970 is due to using an incorrect power adapter and cord -- the only power module and cord that work for the HP Scanjet 3970 are these part numbers: 8120-6260 for the power cord and L1970-80003 for the power module / AC adapter I hope this info helps you.

May 23, 2010 | HP ScanJet 3970 Flatbed Scanner

1 Answer

What specification is it for me to purchase


Your part should be Epson AC adapter A241B 15.2v 1.4A 30W. The power cord is a generic type cord common with printers and scanners, it should be easy to find if the power adapter doesn't come with one already. You may be able to find it cheaper somewhere online like Ebay.

Mar 05, 2010 | Epson PERFECTION 1670 AC Adapter 2084614...

2 Answers

Epson V100 flatbed scanner power cord


There's a shop in the UK or Sweden called Clas Olsen that sell a range of multi headed adapters, you have a pack that has the usual ones you see and they have a pack for other adapter heads and one of them fits the V100. How do i know? Cos I bought one for my scanner but it will set you back by £25.

Feb 28, 2009 | Epson Perfection V100 Flatbed Scanner

1 Answer

Missing power cord


buy a new power adapter with an input of 200-240v 50/60Hz 0.4A and an outout of +12V----1.25A.

Feb 23, 2009 | Genius ColorPage Vivid Pro Flatbed Scanner

1 Answer

I need to find a power adapter/cord for a umax 6400 scanner


go to ebay.com and look up your power cord you need
it should work
or go to a store and buy it

Dec 10, 2008 | Umax Astra 6400 Flatbed Scanner

1 Answer

New Power Cord Stopped Working


DO NOT use the HP power adapter that is 19V / 3.95A. That is too much power for the Scanjet, which is expecting 12V DC (and a much lower amperage). It's possible that hooking up this power adapter may further damage the electronics inside the scanner. If the second adapter has stopped working then it is possible that the internal circuit board has damage already and another adapter may not work. If you have access to a multimeter / voltmeter you could check for the 12V coming from the adapter. If you're getting the 12V, then the internal circuit board to the Scanjet is probably defective.

Nov 17, 2007 | HP Scanjet 4470c Flatbed Scanner

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