I have an MTX 1501D amplifier that does not work. The amp has been used very little, and worked fine for me while I had it. I sold the amp to a friend, and he may have damaged it trying to install it and gave it back.
I opened the case and did not find any discolored or burnt components. Are there problems that usually occur with these amps, or any ideas on what to check? I am good with electronics but I do not have an oscilloscope. Any diagrams, guides, or advice would be very much appreciated.
I opened the case and did not find any discolored or burnt components. Are there problems that usually occur with these amps, or any ideas on what to check? I am good with electronics but I do not have an oscilloscope. Any diagrams, guides, or advice would be very much appreciated.
I do not believe LED238 lights up, but LEDs 399 (highlighted by green box) and the large 463 that shows from the outside near the MTX logo both light up when the 12V and REM terminals are supplied with 12 volts. There is also a faint high-pitched tone that the amplifier emits as soon as it is connected to power, followed by a low volume hissing and crackling sound that continues until power is disconnected. I have attached some pictures of the amplifier. Any help or advice would be great. Thank you.
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Hello, dear friends! I'm from Russia, sorry foe my english
I have a problem with me 1501, do You have a circuit diagram (basic electric scheme, circuit scheme or electrical scheme)? Or may be You can take pictures of the elements (parts) inside it so close, so I can see numbers and letters on all elements?
I have a problem with me 1501, do You have a circuit diagram (basic electric scheme, circuit scheme or electrical scheme)? Or may be You can take pictures of the elements (parts) inside it so close, so I can see numbers and letters on all elements?
the answer of mtx:
1) D260- ZENER MMSZ5250B 20V SMD SOD-12
2) D263- DIODE MMBD4148SE CATH-ANODE SM
3) D326- ZENER MMSZ5242B 12V SMD SOD-12
4) Q263- TRANSISTOR NPN MMBTA42 SMD SOT
5) FET260- MOSFET N-CH 200V 44A TO-220 9 EA P
FET245,FET246,FET247,FET248,FET255,FET256,FET257,
FET258,FET260
***FETS MUST BE MATCHED***
***DO NOT MIX MANUFACTURERS AND/OR DATE CODES ON
THE SAME AMP***
6) FET471- MOSFET N CHANNEL 75339 TO 220A 9 EA P
FET435,FET436,FET437,FET438,FET439,FET440,FET441,
FET442,FET471 ***DO NOT MIX MANUFACTURERS AND/OR
DATE CODES ON THE SAME AMP***
1) D260- ZENER MMSZ5250B 20V SMD SOD-12
2) D263- DIODE MMBD4148SE CATH-ANODE SM
3) D326- ZENER MMSZ5242B 12V SMD SOD-12
4) Q263- TRANSISTOR NPN MMBTA42 SMD SOT
5) FET260- MOSFET N-CH 200V 44A TO-220 9 EA P
FET245,FET246,FET247,FET248,FET255,FET256,FET257,
FET258,FET260
***FETS MUST BE MATCHED***
***DO NOT MIX MANUFACTURERS AND/OR DATE CODES ON
THE SAME AMP***
6) FET471- MOSFET N CHANNEL 75339 TO 220A 9 EA P
FET435,FET436,FET437,FET438,FET439,FET440,FET441,
FET442,FET471 ***DO NOT MIX MANUFACTURERS AND/OR
DATE CODES ON THE SAME AMP***
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