Rockford Fosgate Power 1000 problem

[Perry Babin]

That's flux. No need to remove it.

Don't lose the white insulators in the holes for the screws.

 

[Perry Babin]

Post 17?

 

[secrets]

I cannot seem to fing the 17v except on those transistors And those resistore close to the big caps ,let me begin to trace it from the bottom of the board just worried about powering it up without it being screwed to the heatsink.

 

[secrets]

Perry I traced the 4.3k resistors on the back of the board and found one end of each for all 4channels connct and end up to a mps a06 transistor reads -17.66 emitter -17.14 base and 5.10v at collector . 5.10v is what i get from the 4.3k’s . On the mpsa56 it reads emitter 18.12v base 17.59 collector -4.46 which is the same on the 4.3k’s on the negative rail side. Could those be bad?

 

[Perry Babin]

yes

 

[secrets]

Hope digikey carry’s them?

 

[Perry Babin]

They do. Order extras.

If you have junk amps laying around, you may be able to find some to install for testing.

 

[secrets]

I sure will and once received and installed I will post and Thank You very much for your help and instructions If anything comes up that I should check further just post and I will respond .your time and assistance is greatly appreciated Perry .

 

[secrets]

Perry or other tech pro’s .Would like to ask for assistance ordering the correct parts from mouser or digikey . Mouser has lower shipping . For the Fosgate Power 1000 The trans
Mpsa56
Mpsa06
2n5550
2n5401
All have some different characteristics so I am a little confused on what would be suitable replacements . Any help or advice will be appreciated .It is for the oldschool RF PW 1000’s 17v sw section .Mouser or Digikey but there website is confusing . Thanks

 

[Perry Babin]

There's almost no way to order a part that won't work. Copy and paste (working) links to the parts you plan to order so we can make sure that they're compatible.

 

[secrets]

Here are the parts I plan to order ..
MPSA56-AP Micro Commercial Components (MCC) | Mouser

MPSA06-AP Micro Commercial Components (MCC) | Mouser

2N5550TA ON Semiconductor / Fairchild | Mouser

2N5401-F Rectron | Mouser

Was wondering if these parts would be ok as replacements?

 

[secrets]

Or from Digikey
Mpsa56
Transistors - Bipolar (BJT) - Single | Discrete Semiconductor Products | DigiKey

Mpsa06
Transistors - Bipolar (BJT) - Single | Discrete Semiconductor Products | DigiKey

2n5550
Transistors - Bipolar (BJT) - Single | Discrete Semiconductor Products | DigiKey

2n5401
2N5401 Central Semiconductor Corp | Discrete Semiconductor Products | DigiKey

These are from digikey.

 

[Perry Babin]

I prefer the onsemi parts but all are likely OK.

 

[secrets]

Same here I had good luck with onsemi as well Any you prefer more as for the specs ,just being a little cautious .

 

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Perry I know this question is not related to this thread but wanted to ask if you sell amps as well? Looking for a Hk ca260. If I remember Hk made a larger one than that but cannot remember the model . I will go and order these parts and try to buy onsemi and post an update on the install , just crossing my fingers nothing else is wrong .

 

[Perry Babin]

I do not sell amps.

Remember to order extras.

#34: ?

 

[secrets]

I will order extras Thank you Perry.

 

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Had bad luck so many times ordering parts from ebay when I should stay away from that .ordering from digi or mouser has never let me down . I ended up doing mor damage with parts from the bay as far as burnng some amps and more .Just get confused on digi and mouser . I will have to order your course and take this serious in order to learn this trade . I’m into hifi audio ,vintage as well but still a rookie .Your course will help me in that field as well .

 

[Perry Babin]

With few exceptions, no one should expect to get good quality parts from ebay. This is especially true for obsolete and hard to find semiconductors.

I bought a bunch of old Pioneer cassette decks with the intention to get them all in top condition but it will likely never happen. I still can't bear to sell them. I even have an RT-909 and a CT-F1250.

The repair tutorial has information that spills over into circuits used in home audio but virtually all examples are for car audio amps.

 

[secrets]

I have a few old decks as well ,marantz but cannot find some belts and idler tires .ordered a few from there only to find they do not match .For receivers so many transistors that do not stand up .