My Bugera 1960 stopped working in the middle of a rehearsal. I was playing at about level 3/4 in the 1st input of the 2nd channel. The amp was connected to a Marshall 4x10 bass cabinet. The connection of the amp and cab was correct, the impedances matched and the cable is in good shape and it was inserted correctly. I suspect that it's a bad component. If so, wich component is more likely to be the one that broke?

Repairing the input jack on your Bugera 6262 amp head is a task that requires careful attention and technical expertise. If you're comfortable with electronics and have experience working with amplifiers, you can follow these general steps to access and repair the input jack. However, please note that working on high-voltage electronics can be dangerous, and if you're not confident in your abilities, it's best to seek professional assistance.

1. Safety Precautions:
   • Disconnect the Power: Ensure that the amplifier is completely unplugged from the power source before you begin any work. This is crucial to prevent electric shock.
2. Gather Tools:
   • You'll need a set of screwdrivers (Phillips and flat-head) appropriate for the screws used in the amplifier's casing.
   • A soldering iron and soldering supplies (solder, desoldering braid, etc.) for working on the input jack connections.
3. Opening the Amp:
   • Remove the screws holding the amplifier's chassis in the enclosure. These screws are usually located on the rear panel or sometimes underneath the amp. Keep track of the screws and their locations.
4. Accessing the Input Jack:
   • Once the chassis is removed from the enclosure, you should have access to the internal components of the amplifier. Look for the input jack and its connections on the PCB (printed circuit board).
5. Repairing the Input Jack:
   • Carefully examine the input jack's connections. If you see any loose or broken solder joints, you'll need to re-solder them. Use a soldering iron to heat the solder joint and apply a small amount of new solder if necessary.
6. Testing and Reassembly:
   • After repairing the input jack connections, it's a good idea to test the amp's functionality before fully reassembling it. Plug in your instrument and ensure that the input jack is working as expected.
7. Reassembling the Amp:
   • Once you've confirmed that the input jack is functioning properly, carefully reassemble the amplifier. Make sure to secure all screws and components properly.

Question moved from 'Cars and Trucks' to 'Bugera 333XL'.

https://www.google.com/search?q=BUGERA+model+333xl+schematics+for+amplifier

No Service manual, but you could ask.

Download Center - Bugera

https://www.bugera-amps.com > downloads

Find and download product manuals and drivers for your Bugera product here. ... 12345...48. Bento Box. Service. We love to help you.

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Hi,

When you turn the amp on, does all the tubes light up? please add more info to help you out.

These amps have a few issues. I would take to a tech, and go over many of the poorly soldered connections on the circuit board.

Microphonic tubes can be detected by tapping them lightly with a pencil. I cannot find if this uses a spring reverb, but if it does, vibrating the cabinet will get a clanky type sound from the reverb tank. This MAY use a digital reverb however which is immune to that. Next thing is to make sure your guitar can't "hear" the output sound of the amp because the strings can pick up the sound and resonate feeding back into the amp. You can detect if this is happening by quickly dampening the strings and see if ringing gooes away. You probably need 6 to 10 feet of clearance between the guitar and the amp OR put your body between the amp and the guitar. ALWAYS set sound level at safe levels. Get a sound meter and go no higher than 90 Db. I know a lot of near deaf musicians whose careers are near over because of hearing loss using too high level.

The problem is the BOSS is designed to handle a guitar level at -20Db and the effects level is designed to run at either -10 Db or +4 Db. You will get better match setting the Bugerra effects to the -10 setting on the back and reducing the level... HOWEVER the pedal will want to send -20Db out which is 10 Db under what the effects return wants to see. This is a factor of three roughly in gain so the signal will be low. This is the problem using a guitar pedal in a way it wasn't designed to be used. The effects loops are looking for "line level" NOT guitar levels.

Schematics aren't going to help. The normal thing is to connect your guitar to the pedal and send the output of the pedal to the amp.

Guess what? The same things apply to your delay pedal... they are intended to accept the signal from the guitar OR the guitar like level from another pedal such as the GE7.

Tubes lighting does NOT mean they are working... AND some have two heaters because they are two tubes in one... so you have to verify the small ones have two heaters working... that is a starting point. Next tests involve a bit of electronics test equipment, namely a multimeter to check the poower supply is working. There are lethal voltages in this unit so find someone with experience to do these checks for you.

The user manual is located at: http://www.bugera-amps.com/PDF/Downloads/1960_P0671_M_EN.pdf on page 5; When the HIGH 1 and LOW 1 (or HIGH 2 and LOW 2) connectors are used simultaneously, their sensitivity is the same (both LOW). This may be your problem however--- Try swapping input chanels to see if the problem follows ther cable or is in the amp.
Assuming it was working before, you may have a short in the cable or a bad component or tube in the amp. Tubes can be difficult to come by. If the other channel works correctly, It may be one of the small tubes. Hope this helps

Try posting on some of the guitar forums. The schematics you are looking for are only available to licensed repair persons but you might get lucky and find someone who will send them to you. Be sure to state what model amplifier you want. If you are a tech try looking at some schematics for a similar amp and tracing the circuit.