Hi can anyone help me please?
i have a Non branded Amp called Pro-240
4 Transistors have blown
and 1 resistor
the numbers on the transistors are A940
only info i can get is this
A490 C2073
TO-220 PNP
http://216.239.59.104/search?q=cache:fmGy2WEOheIJ:www.elite-ent.com.hk/php/pdf/To-220/A940(TO-220).pdf%3FPHPSESSID%3D597428d6d3003a87c0d6ecd071850b87+transistor+A940&hl=en&ct=clnk&cd=1&gl=uk&lr=lang_en
i am strugeling to get this in the UK or find an equivilant
please help
Thanks
i have a Non branded Amp called Pro-240
4 Transistors have blown
and 1 resistor
the numbers on the transistors are A940
only info i can get is this
A490 C2073
TO-220 PNP
http://216.239.59.104/search?q=cache:fmGy2WEOheIJ:www.elite-ent.com.hk/php/pdf/To-220/A940(TO-220).pdf%3FPHPSESSID%3D597428d6d3003a87c0d6ecd071850b87+transistor+A940&hl=en&ct=clnk&cd=1&gl=uk&lr=lang_en
i am strugeling to get this in the UK or find an equivilant
please help
Thanks
What's the power output of this amp and do you have the circuit?
This is an odd transistor ( The full part no is 2SA940 ) for a power amplifier it looks like its supposed to drive a TV or Monitor. Full data sheet at: http://pdf1.alldatasheet.com/datasheet-pdf/view/2524/MOSPEC/2SA940.html
The C2073 which I assume is the NPN complementary part - again full part no is 2SC2073 data at: http://pdf1.alldatasheet.com/datasheet-pdf/view/2537/MOSPEC/2SC2073.html
This may help you find replacements
Tony.
This is an odd transistor ( The full part no is 2SA940 ) for a power amplifier it looks like its supposed to drive a TV or Monitor. Full data sheet at: http://pdf1.alldatasheet.com/datasheet-pdf/view/2524/MOSPEC/2SA940.html
The C2073 which I assume is the NPN complementary part - again full part no is 2SC2073 data at: http://pdf1.alldatasheet.com/datasheet-pdf/view/2537/MOSPEC/2SC2073.html
This may help you find replacements
Tony.
Hi thanks for reply
i do have the PCB out and can post a picture of the circuit
the other numbers on the Transistors that have blown are as follows
There is a Italic F at the top am assuming thats the brand
then in a embosed circle (U) then 537
then underneath A940
this is all the info i have on the amp
PA DJ Amplifier - "PRO 240" 480 Watt
Art Nr: AW1248244
480 Watts power!
High performance amplifier with 19” width, 2HE
High power and fidelity paired with a convincing design!
Fits in every system as easy as winking (19” standardised)
Ideal for monitoring, PA use, parties etc.
Stable 19” steel-body, 2HE
Powerful 2x106W RMS at 8 Ohm
Frequency 20-45.000Hz
Distortion factor >0,3%
Signal-to-noise ratio 80dB
Separated mixer for volume left/right
Peak and Protection LEDs
Front-sided on/off switch
Back-sided high-performance ventilator
Input over 6,3mm jack
Speaker output with golden 4mm screw plug terminal, PA cable or Jack
Safety switch (short-circuit-resistant)
Dimensions B x H x T: 485 x 95 x 270 mm
Weight 9 kg
i do have the PCB out and can post a picture of the circuit
the other numbers on the Transistors that have blown are as follows
There is a Italic F at the top am assuming thats the brand
then in a embosed circle (U) then 537
then underneath A940
this is all the info i have on the amp
PA DJ Amplifier - "PRO 240" 480 Watt
Art Nr: AW1248244
480 Watts power!
High performance amplifier with 19” width, 2HE
High power and fidelity paired with a convincing design!
Fits in every system as easy as winking (19” standardised)
Ideal for monitoring, PA use, parties etc.
Stable 19” steel-body, 2HE
Powerful 2x106W RMS at 8 Ohm
Frequency 20-45.000Hz
Distortion factor >0,3%
Signal-to-noise ratio 80dB
Separated mixer for volume left/right
Peak and Protection LEDs
Front-sided on/off switch
Back-sided high-performance ventilator
Input over 6,3mm jack
Speaker output with golden 4mm screw plug terminal, PA cable or Jack
Safety switch (short-circuit-resistant)
Dimensions B x H x T: 485 x 95 x 270 mm
Weight 9 kg
Netlist said:A970 is in fact 2SA970. You could substitute it with MJE15031 which is easily available and a very reliable device.
/Hugo
Hi it was A940
but thanks for help
thanks
Think ive found them what luck
http://cgi.ebay.co.uk/2SC2073-TOSHI...ryZ36332QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
http://cgi.ebay.co.uk/2SC2073-TOSHI...ryZ36332QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
Rossy said:Hi it was A940
This of course was a typo.
Rossy said:Hi the 2SC2073 is NPN like you say but the original is PNP will this matter?
thanks
You need to replace NPN with NPN and PNP with PNP.
So, previous posts is still valid. You can replace 2SA940 with MJE15031.
If the amp doesn’t contain 2SC2073, you need not to bother.
If it has, MJE15030 is a good substitute.
/Hugo
Hi this is the left Channel that has blown
thanks
there is a 220R resistor (fuesable) that has blown and will need replacing all other componants check out apart from the 4 transistors
But i am having dificulty finding compliments for the MJE15031 here in the UK
thanks
there is a 220R resistor (fuesable) that has blown and will need replacing all other componants check out apart from the 4 transistors
But i am having dificulty finding compliments for the MJE15031 here in the UK
An externally hosted image should be here but it was not working when we last tested it.
Hi thanks for Helping me
Ok all 8 Transistors are A940 4 for each channel
i circled the 4 that have been blown and the 1 resistor
Ok all 8 Transistors are A940 4 for each channel
i circled the 4 that have been blown and the 1 resistor
An externally hosted image should be here but it was not working when we last tested it.
So all you need is MJE15031.
Replace the 2SC1815 as well just above the 220R resistor.
Check the other small transistors, all are 2SC1815 and 2SA1015.
I don't know of any suppliers in the UK, you could try Farnell. They sure have the MJE15031 and 2SC1815.
As for the 2SA1015, you could replace it with BC212, also available at Farnell but not pin compatible.
/Hugo
Replace the 2SC1815 as well just above the 220R resistor.
Check the other small transistors, all are 2SC1815 and 2SA1015.
I don't know of any suppliers in the UK, you could try Farnell. They sure have the MJE15031 and 2SC1815.
As for the 2SA1015, you could replace it with BC212, also available at Farnell but not pin compatible.
/Hugo
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