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 25 (click to view)
AV-4300 AV-5000 2.4.3 Stadium Surround Check
Ad justment Procedure 1. Set to SURROUND : STADIUM " Check that the following waveforms are obtained (Input signal (1) and (2)). " Front : Chec k that the phas es of R and L are different and 400Hz is superimposed on 5kHz. The amplitudes of R and L are different. " Rear : Check that the phas es of R and L are opposite and 400Hz is superimpos ed on 5kHz. The amplitudes of R and L are different.
2.4.6 Concert Hall Surround / Monaural Check
Ad justment Procedure " Check that the following waveforms are obtained (Input signal (1) only).
" Front: The phas es of R and L are different. The amplitudes
are different.
" Rear: The phas es of R and L are opposite. The amplitudes
of R and L are equal.
No te: The monaural check c an be omitted. Amplitude levels of front R and L are not even depending on the P.W.B. Center has no output. Note: Center has no output.
2.4.7 Dolby Pro-logic Che ck
Ad justment Procedure 1. Set to DOLBY PROLOGIC " Check that the following waveforms are obtained (Input signal (1) and (2)).
" Front : 400Hz is superimpos ed on 5kHz. " Rear : R and L are the same signal and 400Hz is
2.4.4 Stadium Surround/Monaural Check
Ad justment Procedure
" Check that the following waveforms are obtained.
(Input signal (1) only)
" Front: R and L waveforms are almost equal. " Rear: R and L waveforms are almost Zero.
superimposed on 5kHz.
No te: Center has no output.
No te: MODE is PROLOGIC (NORMAL)
2.4.5 Conc ert Surround Check
Ad justment Procedure 1. Set to SURROUND: CONCERT HALL. (Input signal (1) and (2)).
" Front: Check that the phases R and L signals are different
2.4.8 Dolby Pro-logic / Monaural Check
Ad justment Procedure " Check that the following waveforms are obtained (Input signal (1) only).
" Front: Almost no output from both R and L. " Center: Same as the audio input signal. " Rear: Almost no output from R and L.
and 400 Hz is superimposed on 5kHz.
" Rear: Check that the R and L are opposite and 400Hz is
superimposed on 5kHz.The R and L amplitudes are equal.
No te: Amplitude levels of front R and L are not even depending on P.W.B. Center has no output.
