Crate Blackheart BH15 112 Handsome Devil Guitar Amp Combo, 15W All Tube with Attitude - Answered Questions & Fixed issues

Yes, if you have "line out" from 788. You will need appropriate cables to attach to PC sound card.
Paul

Check your guitar with another amp, or a different guitar with this one with no effects pedals, etc, to narrow it down to just the amp. At that point, try reversing the polarity. If none of the above helps, you may indeed have a bad ground somewhere and you'll need a tech to follow it to the source.

I also have this issue. Same crate combo amp. There is a loud buzz emitted only when there is a cable plugged in. Cables and instruments checked good, only possible issue is inside the input of the amp. Popped it open, solders and connections were intact and appeared solid. Anyone have a guess as to why this is happening?

It is a very simple amplifier and the pa4a is similar.

https://www.google.com/search?q=Schematic+crate+g60xl&oq=Schematic+crate+g60xl&aqs=chrome..69i57&sourceid=chrome&ie=UTF-8

Request from Crate

bad output transistors.

Clean the volume and tone pots with de-oxit cleaner

remove top screws by handle.

https://www.amprepairparts.com/schematics.htm

Try with a on/off footswitch Wrong cable, or bad PCB connection switch on main tone board.

SLM sold the company years ago to Loud audio. Its only supported online now. Loudaudio.com

Power supply capacitors failed. This is a common problem with 1990's crates, also the power on "POP".

https://www.amprepairparts.com/schematics.htm Use the GX-65, its the same preamp shopwn just with 2 power amp sections

There is a short somewhere, check your wiring and solder points.

If sure that power is reaching and getting into unit, then confirm that a signal is also reaching unit. If both are positive, then your gear is FUBAR if signal is going into correct input.

1. Sounds like it's the input jack., but it could be the volume knob. Have you tried turning Gain1 and Gain 2 or the Clean Channel volume? Try them first when you're plugged in to the jack on the left , then when you're plugged in the back. If none of these work, it's most likely the preamp. 2. Even if the preamp is shot, there's a quick fix - get a guitar preamp or an effects pedal - they have volume and tone controls. 3. Finally - many pros just plug into the aux jack(on the rear panel) and control the volume and tone through their instruments. Hope one of these works. Good Luck.

Contact the Crate Service Department at 1-800-738-7563 or 314-569-0141 (8:30am-5:00pm central time, Monday-Friday) to order any parts and/or schematics.

Web page with schematics and requests:http://music-electronics-forum.com/t26486/http://music-electronics-forum.com/attachments/15279d1315547654-crate-vc6112.pdfhttp://music-electronics-forum.com/t16609/http://music-electronics-forum.com/attachments/7268d1260872380-crate_vc6112_271pwa_5.pdfhttp://music-electronics-forum.com/attachments/7269d1260872394-crate_vc6112_271sch_5.pdfhttp://music-electronics-forum.com/sitemap/f-60.htmlUser guide at link below from 1998 has mailing address in St. Louis. https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&ved=0ahUKEwit2JO06LbZAhVG2GMKHflPAxEQFgg4MAI&url=http%3A%2F%2Fpdfstream.manualsonline.com%2F6%2F6d0e7f56-c06e-40bc-9925-bb1c66338de7.pdf&usg=AOvVaw1Qy5Pze8vKekErxgjmMg0U Crate VC 6112 Owner Manual