Question about Line 6 Spider Iii 15 Modeling Guitar Amplifier 15 Watt

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Its not the internal fuse or plug fuse, their both ok. Just got no lights and only solid black boxes in the LCD display.

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Hi there. Switch Mode Power Supply failure. Probably cooked power MOSFET. Only uses PCB to dissipate heat. POOR design and I told them so. (Line 6)
Thanks
Paul

Posted on Jul 11, 2009

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I have been playing my clavinova as usual, then suddenly the power went off. We have no power cut and all plugs are okay. Help!


Do you have a red indicator light or any type of illuminated display?

check fuses\n plug, if this is ok there are a couple of internal fuses.
obvioysly make sure you disconnect the mains cable before opening the keyboard, if these are ok then unless you have technical knowledge I would seek the advice of a Yamaha repair specialist.

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Where is the fuse located in a marshall ma100 h amp head


The fuse should be located on the back panel near the power cord. However, there are also internal fuses as well....If the amp is vacuum tube you will also have a HT fuse as wall as a power fuse. If it is a solid state unit then it will have a power fuse.. Hope this helps.....If you need more info let me know....

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4 200b chauvet lights stopped working ,blowing the internal fuses when plugged in.


It is never a good idea using LED lights with Triac switches, which I assume if what will be in your remote control unit. Good old fashioned relay units are fine but there is often a problem with triac and thyristor controls as they do not expect the type of load that LED lights present and they often do not switch on properly causing all sorts of issues including burning out (invisibly) interal circuitry.

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Korg ax3000 g display not working


It is likely something internal. The LCD is backlit so there is a chance it may be something on the order of a bad connection at the power supply input. Possibly a broken wire- as long as unit was not dropped, using a multi meter to check power is a pretty straight forward way to proceed.

If it got wet, there is possibly a burned out pico fuse, or corrosion on a connector or contact area for the rubber conductors for the display.

If unit was dropped- You may want to contact Korg to see if the display board is available. It likely is not. Which means it is a time and or money investment.

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1 Answer

Where is the fuse on the mackie 1801.....there is no fuse tray at the power cord plug....


There are more than one fuse and they are internal. Replacing the fuse without fixing the cause MAY result in causing more damage to components. The fuse is inside to force one to open the box to repair.

Here is schematic:

http://elektrotanya.com/mackie_swa1801_sch.rar/download.html

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1 Answer

Lcd display is what seem to be to bright hard to read black info .or the black symbols are very light hard to read with bright orange lighted display thanks Mark


You don't say what device this is on, HOWEVER most thngs have a "contrast" control that will adjust the visibility.

Sometimes they call this a viewing angle control and sometimes it is a small shaft from the back of a unit, OTHER times it is a setting available through a menu... if you can read the display enough to find it...

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1 Answer

I have a Marshall MG100HDFX 100-Watt Amplifier half stack (solid state) and I now am not getting ANY sound out of the amp. I changed the fuse and the power module behind the fan, and still no sound,...


plug headphone in the effects send jack...If you get somme sound (won't be too loud) there, that means preamp sections are probably ok. Drive a signal into the effects return jack... If power amp responds, it is OK... If both these are OK, then suspect the switch contacts on these two jacks that forward the preamp to the power amp when effects unit is NOT plugged in.
These contacts are a chronic problem.

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1 Answer

Effects Panel


If other lights are on, I have seen a case where the display does not light for a time, especially if it is cold. The gas in the display takes some time to light up like some neon bulbs... the effects should still work, you just can't see the display. Usually the display will eventually come on after a few minutes after being off for long periods. Sometimes one can encourage the display by external radiation such as a cell phone in close proximity.

See if the FX input indicator is functioning.

If the electronics of the DSP/FX is dead, troubleshooting it is not a DIY unless you have special test equipment. The unit uses two 57002 DSP's controlled by an 80C32 micorprocessor. Beyond checking that the 80C32 is operating and busses have activity, you probably won't be able to do any fruitfull troubleshooting

If NO lights come on in this unit, then the power supply has fried and you don't want that as it is likely caused by the rear power amp arcing out.. Lots of work to repair. Since rest is working this is not the case with yours. ALWAYS be careful to insure speaker leads are solid with this amp as an intermitent lead can blow this amp easily.

Behringer does not release their schematics to non-agents...

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1 Answer

No sound, no lights except lcd screen and only shows black boxes


sounds like something shorted. you probably have a shorted relay and maybe more. depends on when the protection circuit kicked in during the short. the relay being shorted will not allow power to even go to the power supply on/off switch. you can test with a mulitmeter, just be care full, black/groung lead grounded to chasis (a must!!!!!! can use a screw hole to stick the test probe in). then set your meter to read 200 ac volts and touch off on a leg of the switch, etc. look at your readings and see what kind of voltage is rolling thru. you should be getting close to 120 acvolts. carefull!!! if nothing then the problem is before the switch, relay, power resistor, diode, etc. The worst case would be a transformer but i am not to sure line 6 power schemes. the relays are hard to find, you should have part numbers on it, for parts goto mouser.com. you can get almost anything.

Jun 26, 2009 | Line 6 Spider Iii 15 Modeling Guitar...

1 Answer

Black boxes on the lcd screen of the spider 6 III amp


unplug it and open it up. there are ribbon tape connections in there that arent very secure. maybe one came loose...

Mar 28, 2009 | Line 6 Spider Iii 15 Modeling Guitar...

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