20 Most Recent Orange Crush 15r 15w Reverb Guitar Amplifier Questions & Answers

I have had switches fail. The type they use are common to fail. You can try snapping it on and off a few times real quick to see if it will start working, otherwise you can buy them in bulk from Digikey for a reasonable price- or steal one off a coffee maker.With it unplugged, just flatten the tabs and push it out the back panel. Short the two wires and plug it in- the amp should turn on.

The headphones socket is on the preamp stage - it works so the problem must be after the pre-amp.
Do you get any sound at all from the speakers (hiss or perhaps a click) when you turn it on?
If yes it is an amplifier problem.
Here are some possible causes

• A wire has come off the loudspeaker - easy to fix
• Speaker protection fuse has blown - small glass fuse mounted on main amplifier chassis - replace with correct rated and type of fuse (note some of these are 'slow' blow type - important that you get the right one)
• faulty component in the main amplifier stage - requires attention from qualified repairer
• Loudspeaker burnt out - this can be tested by connecting another speaker across the terminals of the built in speaker.
• The headphone jack socket automatically disconnects the loudspeaker when phones are plugged in - it could be that the contact in the headphone jack socket is bent and not re-making contact when the headphones are unplugged.

The most likely case is that one of the main output transistors (if which there are many) is shorted. When the protect circuit senses DC on the final output, it will not allow the output relay to come on to protect the speakers from raw DC. With the power removed, you can check between each outputs Emitter and Collector and you will probably find close to zero ohms. From that point you need to unsolder each of the pins of the bad channel until you find the shorted device(s) and replace them.

'pianoforte'

BREV. N. 838420

See page 22 troubleshooting of this manual. It may help you. dd501 (yamaha.com)

Depending on the model, there are four around that date, it could be the insert jacks are tarnished reducing the signal flow between the pre amp stage and digital power amplifier. It could be the power amplifier has failed. It could even be customer error in wiring. This assumes there is the correct level of signal entering the input sockets of course.

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It's a Line 6 and probably requires a software update from Line 6.

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The Roland RD-600 is a digital piano, and its hammer action mechanism is designed to simulate the feel of an acoustic piano. The hammers in digital pianos like the RD-600 are typically made of materials like plastic or a combination of materials to replicate the weighted feel of acoustic piano keys. The breaking of hammers in a digital piano is not a common issue, and it's not typically related to the age of the instrument alone. Several factors could contribute to the breakage of hammers, and it's essential to consider the following possibilities:

1. Excessive Force: If the keys are played with excessive force or if there's any physical damage to the instrument, it could lead to the breakage of hammers.
2. Material Quality: The quality of materials used in the construction of the hammers can impact their durability. If the hammers are made from subpar materials, they may be more prone to breaking.
3. Manufacturing Defects: In some cases, there could be manufacturing defects that make the hammers more susceptible to breakage.
4. Maintenance: Lack of proper maintenance, such as cleaning and regular inspection, may contribute to the wear and tear of components, including hammers.

If you've observed a pattern of hammers breaking with regularity, it might be worth investigating the specific cause. If it's due to excessive force or physical damage, adjusting playing habits and taking care during transport can help mitigate the issue. As for whether it's worth purchasing new hammers from Roland, it depends on the extent of the damage and the overall condition of the instrument. If the RD-600 is in good condition otherwise and you enjoy playing it, replacing the hammers could be a reasonable option. However, you may want to assess the cost of replacement hammers compared to the overall value of the instrument, factoring in the cost of a used RD-600 and any potential future maintenance needs.

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According to the information I found, the serial number 103220 on your piano indicates that it was manufactured between 1910 and 1915

User Manual V-TONE GM108 (musictribe.com) Following page may help to resolve your issue Behringer V-TONE GM108 Support and Manuals (helpowl.com)

I know this post is super old, but it was one of the first hits I had when searching this problem, so I'll post it here in the hopes that it will help someone. I found that I had to get under the cover, and clean/lube the plastic post on the assembly that pushes the button on the circuit board. It's a plastic post that slides in a plastic slot. I think it just gets contaminated with dust and that is the main cause. Philips screwdriver gets you under the cover and removes the two screws that hold that assembly together. Obviously be really careful to not break the plastic post. Looks like the wrong kind of force would snap it very easily. I used Deoxit Fader Lube, sprayed on a rag, and wiped the surfaces where the plastic parts touch. Put it back together and worked the pedal a few times, no squeak.