Little to no signal from tape in MIX mode. Good signal in RECORD mode 6056

[Mattsepanic]

Hello gang ,
Working on our 6056.   Some of the channel VCAs were low signal and thin sounding.  I went through and recapped the cards and this worked great.  Got them all sounding good in REC+ FADER REV mode. Unfortunately when switching to MIX mode.  I have a couple channels that are either no signal or very low level.  I swapped the VCA and INPUt cards with good ones and the problem doesn’t follow the cards.  It’s seems to be on the 611 channel motherboard itself.  Unless another card is effecting the input when switched to MIX mode.  Any help , suggestions, advice would be greatly appreciated TIA

[horizonsound]

It could be a number of things, but I would start by changing out the logic card with a known good one.
That driver the routing on the Input, VCA and Group cards.

Anthony,

[Original_Box]

Silly suggestion, but have you tried the Float switch and/or the gain pot on the line level input? I had a couple channels I thought had issues, but it turned out it just needed a bit of exercise.