Need circuit board manual for mtx 251 D car auidio amp

Mtx 801

you need to think about a better platform : linux for example

http://www.mtx.com/caraudio/products/manualsQuickInstall/amps/XT_1000XD_InstallSheet.pdf

THIS LINK WILL TAKE YOU TO THE SUPPORT PAGE FOR THE 1000XD. IF YOU WERE REFERRING TO THE SERVICE MANUAL OR SCHEMATIC OF THE CIRCUIT BOARD, THEN YOU WILL HAVE TO CONTACT MITEK AT 800-225-5689 AND ASK FOR MR. DABBAS. LET ME KNOW IF YOU REQUIRE FURTHER ASSISTANCE......V

If your talking about the speaker connections on the amp than no,make sure the amp is grounded to the vehicle,and make sure your power and rca are connected,if so check all fuses again,your amp may have a fuse,if its not blown your amp is probably fried.

Even if there is no visible damage, it could be that one of the transistors is blown, Use a multimeter to check the resistance of the transistors.

Remove cover and set in direct sunny window for long time, may be no problem with it, Took a month to dry one of my amps out enough that it decided it would come back to life, cell phone dropped in sink took 2 weeks, If you try power to it too soon --fried--, good luck finding diagram and repairing it sincerely-hope its okay, good amp, bad luck,

There are a lot of problems that can cause the amp to apply DC to the speaker terminals.

Before we go any farther, you should know that this amp stores enough energy to kill. When power is applied, the transistors must be clamped to the sink. After removing power, you MUST wait for ALL LEDs to go COMPLETELY out.

You need to CAREFULLY measure the DC voltage from leg 1 to leg 3 of all of the output transistors (the ones you changed). Post a list of the voltages and circuit board designation (FETxyz) for any that read more than 1v.

Do NOT let the probes short to other pins or to the heatsink when measuring the voltage.

Remember... High voltage and lots of stored energy. Be careful.

the amp have an input harness? those can go bad, or maybe line level inputs are loose. If its not just a loose connection on one of the amps inputs (speaker, line, or power) leading to the circuit board( which could easily be soldered back to the corcuit board), than your looking at an integrated circuit problem- not easy to fix.

Unless your amp is 1 (one) ohm stable then you may have fried it. When you attach a 2 ohm load across a bridged amp then you have effectivly placed each output channel on a 1 ohm load. Not a good thing in most cases. Try hooking up ONE speaker on one channel and one input to that one channel one at a time. Then switch the speaker/input to the other channel and see if you can get either or both channels to work independently. Needless to say you must turn the amp off before you make ANY change in the wiring.

check pwm circuit amps turn on with 3-4 volts on mosfet gates ic 494, 5252or 555 controll these.hit me up for more