This article documents fixes in the case where your machine's bill validator is not taking in notes.
If it's taking in notes but rejecting them, please see the article: 'Bill validator rejecting notes'
While restarting the machine may help, the bill validator itself maintains power throughout machine reboots. Thus, we should start by power cycling the bill validator to fully reset it.
First, switch of the Douro's tablet with a single press to the tablet's power button. (See 'Powering on and off the Douro')
After around 10 seconds when the Douro's screen has gone completely black, unplug the machine from wall power for 15 seconds. Then, plug back into wall power.
When the machine returns to the 'Hello' screen, conduct a test transaction.
Ensure cash box connection
The cash box may not be fully inserted. Remove the cash box from the valut, then insert gently yet firmly into the validator untill it clicks into place. The validator should make a noise as it initializes the cash box. If not, continue below.
Checking for obstructions
There may be an obstruction along the bill path. To check:
Open the machine and vault doors. Locate two hex screws atop the plate surrounding the intake mouth of the validator.
Remove these screws with the hex screwdriver included with the key pack that shipped with your machine.
Then, remove the metal front plate by tilting it forward, gently pushing in on the validator mouth, and lifting the plate up and out.
Carefully guide the validator forward along the railings. Take care with the cabling at the rear, disconnecting it at the white molex connector within the vault.
Open the back hatch of the validator transport to check for obstructions.
While disassembled, you may also clean the sensors with a dry, microfiber cloth. This is recommended on a monthly / bi-monthly basis. (See attached preventative maintenance guide.)
Reassemble, reconnect, and carefully replace the validator into the vault.
If the above steps do not allow the validator to take in notes, please note the color and frequency of any lights displayed on the front of the validator (with the metal vault plate removed), and contact firstname.lastname@example.org to check your machine's logs.