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Old 19th January 2004, 04:36 AM   #11
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Default elaborate

ummmm. right.........
could u explain in a bit more detail, are these just replacement output devices or what? DO u have any links to where i might obtain these?
THanks
Daniel
ps i live in australia
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Old 19th January 2004, 06:23 AM   #12
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MJ and MJE are Motorola type numbers, now ON Semiconductor.

http://www.onsemi.com/site/products/...J21194,00.html

http://www.onsemi.com/site/products/...E15032,00.html

The part numbers listed are the best types in their case style for new build, and for general replacement use.

The suggested resale price from a wholesale stocking distributor is about $2 each on the outputs, and about $0.80 on the drivers. If you buy in manufacturing quantity big discounts are available.

In the US I buy from Future Active or Newark. Check the ON Semiconductor site for local distribution.

http://www.onsemi.com/

($30 each for outputs is a BOHICA price)
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Old 19th January 2004, 08:20 AM   #13
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Default okay. .

So if i were somehow to obtain these parts... how about the resistors? anyone know where to sorce these?
Thanks
Daniel
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Old 19th January 2004, 08:31 AM   #14
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Default ok the outputs

Ok the six huge output transistors mounted on the heatsink are:
3 X 25ci586 090 San Ken
and
3 X 25A909 050 San Ken
So which of the motorolla parts replace which transistors, the part number you gave me could only replace one of these sets of three couldnt it?

Anyway as well as those parts being blown there are a bunch of little transistors on the board blown and some fusing resistors.
Thanks For your help
Daniel
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Old 19th January 2004, 09:18 AM   #15
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Default tested transitors

ok i tested the transistors on the output stage. Well the guy who i paid $30 to tell me it was stuffed did abad testing job. Even me with little experience can pick out the dodgy ones with my diode test. ANyway i only need one 2sc1586 090 or equivalent which is a SI-N/250V/15A/150W/10MHZ . And i need 3 2sa909 050 which i dont know its specs. Please help. THankyou
Daniel
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Old 19th January 2004, 09:52 AM   #16
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Default Useful chart

Japanese Semiconductor part numbers that conform to JIS nomenclature provide useful information about the type of device.

The first character is a numeral which is one less than the effective number of electrodes. Therefore, diodes will begin with '1', transistors with '2'.

The second character is always 'S' to indicate the product is a semiconductor. The third character indicates the type of semiconductor:

A High Frequency PNP Transitor
B Low Frequency PNP Transistor
C High Frequency NPN Transistor
D Low Frequency NPN Transitor
J P Channel FET
K N Channel FET
S Small Signal Diodes

Using this information, we can work out that a 2SC 1964 must be a HF NPN transistor, and 2SK 134 will be an N channel FET.
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Old 19th January 2004, 10:01 AM   #17
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Default Replacement

so the motorolla MJ21194: Power 16A 250V NPN could replace my one blown 2sc1586, however if they are cheap enough id replace all three.
But the other 3 transistors, the 25a909 are pnp, not like the npn ones in the link??
Anyone know where to find them in aust?
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Old 19th January 2004, 01:33 PM   #18
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Default progress

RS australia seem to sell everything
MJ15023 is the same as the 2sa909 i hope sells for $8au
MJ21194 is the same as the 2sc15186 i hope and sell for like $10.
I found i replacement capacitor i think for $30. NOw to find fusing resistors, i think they were like 0.50. and then find some more little transistors. lol. THis is gunna take a while.
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Old 20th January 2004, 01:31 AM   #19
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Default scrapped project.

At the moment my project has faulted. A replacement cap 22000uf 100v is well ove $100. Anyone know where to get a cheaper one. I have a project price limit of $200 otherwise it gets too much. Thanks
Daniel
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Old 19th March 2004, 12:06 PM   #20
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Default amp for sale Yamaha p2200

Ok, my amp is for sale.
230w 8ohm rms continuois sine wave input. One channel is broken. One supply cap will need replacing.
Yamaha guy in bendigo said on average the broken channel in this amp cost $150 to repair. JKL capacitors quoted me around $150 for 2 new supply caps including postage (depends on aussie dollar of course) I no longer need this as i got myself a soundking amp and i am now working almost 50 hours a week so yeah... There is NO glue on the caps!! It is all there, the case looks like it woulda new. I am after $200 ONO. DOnt hesitate to ask questions.
www.geocities.com/elphocfa/yamaha

priscared@hotmail.com
Daniel
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