The purchased manual is an scan of the original Panasonic paper-based Service Manual. Unfortunately the contrast is not perfect, but I am satisfied anyway!
The purchased manual is an high-quality scan of the original JVC paper-based Service Manual. The Service Manual includes the Owner´s Manual, so you do not have to buy both of them.
Complete manual with clear schematic diagrams and printed circuit board layouts of two variants of the headset and the transmitter an old and a new version.
Also shows how the headset and the transmitter is opened and how transmitter and receivers can be adjusted and where to measure.
I had no problems to repair the headset using this service manual.
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.