WANT A CIRCUIT DIAGRAM BP600.1 OR THE NAMES OF MOSFET TRANSISTORS AND THAT IS I would greatly appreciate QE SI ME NOT HELP ME IN ANY SIDE A THE NEED GRASI

Couldn't find circuit diagram but this might help.

Frank, Links below are informative forums on your problem.
Show your appreciation and press the helpful button

http://www.musictoyzforums.com/showthread.php?3649-Marshall-Mosfet-Lead-100-Problem


https://www.google.ca/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&uact=8&ved=0ahUKEwjaisyms__KAhXEtIMKHTmDC5IQFggjMAE&url=http%3A%2F%2Fwww.tdpri.com%2Fforum%2Famp-central-station%2F322304-marshall-mosfet-lead-100-ss-jcm800-needs-help.html&usg=AFQjCNGRF5DJQosO-fRJeObOjKwwtsWzkQ

Thread Marshall Lead 100 Mosfet crackly loss of vol

Look for a bad rectifier bridge or shorted out diode.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/john_32f4b76dad4781c4

Not oscilating

you must have some diagram b) must test some around components like capacitor+diode+resistor+ic+Trafo , that will be in short circuit this will provoke the short in your MOSFET transistor.

God bless you

hi im alwin the Q45 is JE200 while the Q47 is JE210,goodluck,

I would try looking for 2SJ6357. Japanese transistors tend to drop the 2 when putting the numbers on the parts.

First of all is the mosfet your talking about in the output section or in the power supply section? Most car amps use mosfets in the power supply section, some use them in the output section. To test the transistors in your amp, take a digital volt meter and set it to diode check. Then take the leads and put them accross the first and third legs of the transistors. Usally the red test lead on the first leg and black test lead on the third leg of transistor. If you get a reading of 000 then transistor is shorted. If you get a reading below 600 then transistor is on it's way out if not allready or it's next to a shorted transistor that is it's complimentry output transistor. comonly you will have 2 transistors working together, one NPN and one PNP per a channel, or 4 of them in a bridged type output circuit depending on the watts and how man channels your amp has. I was just looking at the specs of this amp and it's got me confused. It says it's a 2 channel but looking at all the info on different pages it says at 4ohm:200wattsx4 and at 2ohms:300wattsx4 and 1 channel mono 600watts into 4ohms. weird for a 2 channel. anyway that is how you test your transistors. Same way for the power supply section but, you will come accross a couple or more switching diodes that look like transistors and you will get a 000 reading when you test those like I specified. They rarely go out and most of the time there is only 2 of them. They will have a diagram like a diode on the front showing you which way the power flows. Let me know what you find out. Your amp should have went to protect mode if you smoked a mosfet.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/mark_b53a7494531bf96d

this set is famous for defective flybacks. part number is 262342. replace the flyback

qe bre ti ku je qe nuk po fol heheh ej nime kush je ti bre se nuk jam ka te njoh qy