Calibrating the MSO4104B

I am working for the calibration department at my company. We have a Tektronix MSO 4104B that we have calibrated. All of the points have come within the Tektronix specifications with the exception of one of the digital probes. The specifications show the voltage should be between 3.78V and 4.22 V and the digital probe is measuring 3.69 V. What are the options for adjustment? I have scanned through the manual and cannot find an internal adjustment to get that probe to come into tolerance. What are my options to get that digital probe back into tolerance? It is channel 8 of the digital logic probes that come with the unit.

The Service manual for the product has the information for the adjustment procedure, Service manual part number 077051202
https://www.tek.com/en/oscilloscope/mso4000-dpo4000-manual/mso4000b-and-dpo4000b-series-1
The procedure requires a digital probe calibrator which puts the same signal on all inputs at the same time. The procedure is an automated procedure in the unit and you must start at the start and go all the way through to the end with no errors or failures, Which could be many many hours.
Double check different probe?
If the Digital input needs to be calibrated you can send the unit into our factory for calibration.

To set up a repair RMA (model and serial number)
call 1-800-833-9200 opt 2. Or 1- 800-438-8165
Or send an email to rmarequest@tektronix.com
Or https://www.tek.com/en/service-quote
Or https://www.tek.com/en/services/repair/mytek_rma_request