Does anyone have a manual in PDF fomat for a Lab Series L5? Can this manual still be purchased through Gibson or another vendor? I have looked online but haven't found a credible seller. I have schematics and repair notes already. Thanks for any help or pointing me in the right direction.

I have a L5 all original that the compressor doesn't seem to function on. When I turn on the amp the compressor lamp lights for a few seconds and then goes off (whether compressor switch is on or off). If I turn the compressor switch on plugged into the second channel the LED does not light in any position of it's controls or playing through it. The sound changes none at all, no clicks, noise,  compressor effects, etc.. I haven't dropped the chassis and checked the switch or other components. I have played the amp for extended time periods and the power seems fine in channel 1&2 and it's quiet as a mouse and sounds good. Reverb works fine. I plugged up a Zoom 5050 chorus through the effects loop and it works perfectly. The frequency pot doesn't seem to change anything that I can tell. I haven't been able to find a users manual online so I'm not sure if I'm doing something wrong. This unit looks almost mint with original speakers and cover. Any quick suggestions or a manual that someone could send me would be cool. I have all the schematics and notes but don't see anything about the compressor not working at all unless I missed it.