Where is the sensor lock switch?

All question need full 'make model (what it is)' first 3 words.

Ricoh copier? So it shouldn't be in Cars and Trucks category :>D

Shipping lock malfunction - fi-6800 / fi-6400 - PFU - Ricoh

PFU https://www.pfu.ricoh.com > global > scanners > erg
Please confirm if the shipping lock (transport lock) is set to the released position. If the switch is set to the locked position, please switch it. [Locked].

Remove Shipping Lock error message on control panel

Hewlett-Packard https://support.hp.com > ca-en > document
Open the cartridge tray and locate the cartridge causing the message. note: The color of the locked cartridge is displayed on the control panel after the ...

Flatbed motor malfunction - PFU - Ricoh

PFU https://www.pfu.ricoh.com > erg > motorlock-6x
Confirm that the shipping lock (transport lock) is unlocked. If not, release it. [Locked]. Scanning. [Unlocked]. Scanning. If the state is not recovered by ...

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Look where your copies come out and there is a switch on the top underside, (green on the M20i) and make sure it is in the unlocked position. You may need to wiggle the switch to fully unlock it. Mine was locked but I was able to re-engage flipping the switch several times.

It your using a newer windows you probably need new software. Try Vue Scan it worked for me on Windows 7 64bit and I have the same scanner. With out dated software it wont recognize the scanner. Hope it helps

that is a networking problem the fact the you can copy eliminates the possibility that there is something wrong with the printer / copier

Your Train source may be your scanner Twain driver. Reinstall the driver. 
http://www.usa.canon.com/consumer/controller?act=ModelInfoAct&tabact=SupportDetailTabAct&fcategoryid=235&modelid=11463#DownloadDetailAct

When [L1-00] appears, the scan head
locking switch is locked. Turn off the
power, release the scan head locking
switch, WAIT 10 SECONDS and turn the power back on.

the problem is the cable in the scanner's mainboard

The scanner lock is locked pls unlock it dude...

This is the info from the error code for your washer DL/F
Door Unlock Error
A Door Unlock Error occurs if the door cannot be unlocked. It will try to unlock the
door 6 times before displaying the error.
Potential Causes
• Door Lock Mechanism broken.
• Check Door Lock/Switch Assembly for foreign objects
• Check Wire Harness connections to the Door Lock/Switch Assembly and Central
Control Unit (CCU)
• Door Lock/Switch Assembly Failure
Note: The Door Lock/Switch Assembly can be manually unlocked. See Section
Seven, TECH TIPS

5A means that the purge cam stopps abnormally when it is in use. This could be of a broken cam shaft. You have to replace the whole purge unit. This is a service job to do!