Thank you very much for this Service Manual, it helped us a lot to repair the M-4318!
...BUT: The parts list is missing and the free parts katalog on web isn't complete, so now we don't know the part numbers of the defect parts :(
We had to build them out of a working machine, and need the numbers to reorder the missing parts now.
Complete original Service Manual in good (scan) quality!
Text excerpt from page 23 (click to view)
3.4 Disassembly the speaker and keypad Step 1 Figure z z z Description
Disassembly the speaker Disconnect the speaker wire with keypad Remove the screws S7 x 2 Take the speaker M1 off.
Disassembly the keypad z z z Disconnect the speaker wire and W5 Remove the screws as shown Take the keypad B4 off.