The Service Manual received was helpful. The electronic information is exactly what I needed.
Text excerpt from page 1 (click to view)
ORDER NO. KMF0008215S3
Compact Plain Paper FAX/Multi-Function Plain Paper FAX
KX-FP101AL / KX-FP101NZ / KX-FP101ML / KX-FP105BX / KX -FP105CX / KX-FP121NZ / KX-FP121AL / KX-FM131AL
Please file and use this supplement manual together with the original and simplified service manuals for the following models.
Note:Supplement-1 have already supplied with printed matter. So please refer to that.