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 8 (click to view)
KRC-765/691/691Y
ADJUSTMENT
BALANCE/FADER/BASS/MID/TREBLE : CENTER T.ADV/METAL/DOLBY NR : OFF No. ITEM INPUT SETTINGS TCC-153 10kHz OUTPUT SETTINGS SP OUT Connect an AC voltmeter to CN5 (X14-). ALIGNMENT POINTS Head azimuth screw (FWD/REV) VR1 (L) VR2 (R) ALIGN FOR Adjust so that output level in playing FWD and REV becomes maximum each. 388mV FIG.