Revox B77 MK II 2 track

[onz3000]

Hello,
Can someone help? I have a problem with my Revox B77 MK II:

Listening to the headphones

MONITOR: "INPUT" setting

LEFT : left channel has a signal, right channel has a signal;
REVERSE : left channel has a signal, right channel has a signal;
STEREO : left channel has a signal, right channel has a signal;
MONO : left channel has a signal, right channel has a signal;
RIGHT : left channel has a signal, right channel has a signal;

------------------------------------------------------------------

Listening to the headphones
RECORDING

MONITOR: "TAPE" setting

LEFT : left channel has a signal, right channel has a signal;
REVERSE : left channel has no signal/noise/, right channel has a signal;
STEREO : left channel has a signal, right channel has no signal/noise/;
MONO : left channel has a signal, right channel has a signal;

RIGHT: left channel no signal/noise, right channel no signal/noise;
--------------------------------------------------------------------

I don't know what the cause is, the base board has been cleaned and checked.

[MilanMilosevic]

Are LINE OUT outputs working correctly?