I have never soldered electrical components, that I can remember. I
have a Sansui 9090 that I was told has 4 diodes that sometimes go bad,
and since I have no switched power, one may be bad. First, does this
sound right? Second, would it be a good idea for me to clean the dust
off my cheap soldering iron and try to replace them? Or test them all
first? Can I hope to find replacements? What area of the unit should
I look for them in, have not studied this thing yet.
Help is appreciated. Dennis

"dennis" wrote in message
ups.com...
I have never soldered electrical components, that I can remember. I
have a Sansui 9090 that I was told has 4 diodes that sometimes go bad,
and since I have no switched power, one may be bad. First, does this
sound right? Second, would it be a good idea for me to clean the dust
off my cheap soldering iron and try to replace them? Or test them all
first? Can I hope to find replacements? What area of the unit should
I look for them in, have not studied this thing yet.
Help is appreciated. Dennis



No. If you have no idea how to solder you will make a right mess and
possibly destroy the PCB. At best you will get a dry joint.

Do some Googling on soldering techniques, then practice on an old radio or
something.

Then Google some more on power supplies.

Then get a multimeter and measure your amps power supply.

Then maybe put all your new found knowledge to good use.





Gareth.

From the way you are asking, you have more of a chance to do more damage
than good. Why not take the amp to a service centre and have the job done
right?

Have you checked the diodes to know if they are in fact defective?

If they are defective, have you determined the cause?



--

JANA
_____


"dennis" wrote in message
ups.com...
I have never soldered electrical components, that I can remember. I
have a Sansui 9090 that I was told has 4 diodes that sometimes go bad,
and since I have no switched power, one may be bad. First, does this
sound right? Second, would it be a good idea for me to clean the dust
off my cheap soldering iron and try to replace them? Or test them all
first? Can I hope to find replacements? What area of the unit should
I look for them in, have not studied this thing yet.
Help is appreciated. Dennis

"dennis" wrote in message
ups.com...
I have never soldered electrical components, that I can remember. I
have a Sansui 9090 that I was told has 4 diodes that sometimes go bad,
and since I have no switched power, one may be bad. First, does this
sound right? Second, would it be a good idea for me to clean the dust
off my cheap soldering iron and try to replace them? Or test them all
first? Can I hope to find replacements? What area of the unit should
I look for them in, have not studied this thing yet.
Help is appreciated. Dennis


Dennis, i recommend that every time you get the urge to delve into this you
have a few beers and a couple of shots. it wont make the problem go away but
you may forget about it for a while.

this is that same advise if give you had you asked "how should i go about
defusing a land mine?"

you simply do not have the training to proceed safely.

On 3 Mar 2006 07:49:09 -0800, "dennis" wrote:

I have never soldered electrical components, that I can remember. I
have a Sansui 9090 that I was told has 4 diodes that sometimes go bad,
and since I have no switched power, one may be bad. First, does this
sound right? Second, would it be a good idea for me to clean the dust
off my cheap soldering iron and try to replace them? Or test them all
first? Can I hope to find replacements? What area of the unit should
I look for them in, have not studied this thing yet.
Help is appreciated. Dennis


The 9090 wasn't known for defective power supply diodes but it had a
major problem of 2 1 ohm resistors opening up causing a dead receiver.
Chuck

In article , Chuck wrote:
On 3 Mar 2006 07:49:09 -0800, "dennis" wrote:

I have never soldered electrical components, that I can remember. I
have a Sansui 9090 that I was told has 4 diodes that sometimes go bad,
and since I have no switched power, one may be bad. First, does this
sound right? Second, would it be a good idea for me to clean the dust
off my cheap soldering iron and try to replace them? Or test them all
first? Can I hope to find replacements? What area of the unit should
I look for them in, have not studied this thing yet.
Help is appreciated. Dennis


The 9090 wasn't known for defective power supply diodes but it had a
major problem of 2 1 ohm resistors opening up causing a dead receiver.
Chuck

I guess the idea is to check most everything on the front end of the power supply.
Check first, instead of, replace all first. Description abouve sounds like a turn on delay
using some resistors.

greg