ONKYO TX-DS575

[saxmonster]

Thanks again for all your help,

Can you check out my cart and make sure it looks ok.

http://www.digikey.com/short/3799q2

I could not fine any 5.6v output voltage regulators is 5v bad? (see cart)  If this doesn't work can you double check Digikey, I looked everywhere in digikey.  But I don't know everything I am looking at.

Also what will I do with the silpad.  The voltage regulator just stands up and nothing touches it, its not attached to anything or any heatsink.  Should I get a heatsink for it?

Again thanks for you time and patients.

-Scott

 

[Khron]

Oh, if it has no heatsink, then nevermind the silpad My thinking was that, in case it WAS attached to a (grounded) heatsink, since the regulator's tab and middle pin are also tied to ground, you WOULD have had to isolate it from the heatsink, since the easiest way to increase the output voltage of a fixed regulator is this:

http://en.f-alpha.net/electronics/integrated-circuits/voltage-regulator/lets-go/experiment-5-higher-voltage/

Yes, i know that 5.6v regulator's anything BUT standard. But if you bend the middle pin of the new regulator outward, solder it to the 1N4007 (with the silver band away from the regulator), and the other end to where the middle regulator pin was, you should get something like 5.6-5.7v at the output.

Without this trick, you'd get the 5v, but between that and the power inputs of the Micom (for example) there are other diodes, so the Micom would end up receiving only 4.3-4.4v which... might not be quite ideal, let's say.

 

[saxmonster]

Well hopefully its just the cap thats bad and not the regulator.  So should I just go ahead and order the cart with out the pad?  Everything else look ok?

Thanks again

 

[Khron]

Yeah, Chemicon KY's are pretty good, diode's "jellybean" (ie. standard), same with the regulator.

 

[saxmonster]

Ok It's ordered thanks again.

-Scott

 

[saxmonster]

Ok replaced the c952 cap on the primary circuit pcb and still nothing.  I measured the output of the cable (JL961) of the primary circuit pcb that runs to the main circuit pcb and it still is outputting 21 vdc to the main pcb.  Yet q931 only shows 3.8vdc on the in side and 2.2vdc on the outside of q931. 

Why doesn't the q931 show 21vdc or 13vdc on the input side of it?

 

[saxmonster]

So I did some more digging.

When I disconnect the cable running to the display pcb the voltage output of Q931 is normal 5.57 VDC and the positive side of C935 is also 5.57 vdc.  So I assume I made a mistake somewhere on the display board causing it to short somehow and make Q931 only output the 2vdc.  Going to take the display pcb apart now and see if I can find any mistakes with the two components I installed.  Errrrrr.

 

[saxmonster]

So I removed the remote sensor from the display board and the bitch fired UP!!!!!!!!!!! WOOHOOO!!!!!!!!

So why doesn't this RF work?  I looked up the specs of the original and the replace was so posed to be this one.  Here is the one I ordered to replace the broken one.

http://www.digikey.com/product-search/en?keywords=425-2522-ND

If C7008 has failed would it make the new RF not work and create a short?

Thanks again for all your help.

 

[saxmonster]

Ok so I reinstalled the old RF sensor and replaced C7008 with a new one.  It started back up just fine again and now the remote works just fine!!!!!!!!

Thanks so much for your time and talents.  I am glade I didn't give up on this.  Feeling so good right now.

I need to put everything back together now, the fun part, haahahha.

 

[Khron]

Well, there you go, then Glad to hear you got it all sorted out, eventually