Quote:
Originally Posted by Pricklely Peete /img/forum/go_quote.gif
I may have spotted something in one of the pics you posted. There are 4 x 47uf 10V coupling caps (Elna Silmic) near the 2 voltage regulators on the lower right hand corner of the main pcb (if the front faceplate is towards you as normal).
I can't tell for sure but it looks like one or all of those caps are not installed correctly according to their polarity. The shaded side silk screening on the pcb itself denotes - or negative pole. All electrolytic caps will have a negative indicator stripe (can't miss it ). Check the whole main board to make sure all the electrolytic caps are installed correctly just to be safe.
Someone else of late had one those coupling caps installed incorrectly by the factory although he was still getting sound but at reduced output to that channel (it was one of four in backwards).
Hopefully that's the ticket.
Peete.
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Hi Peete,
Today I had the time to see whats wrong with the Zero and I did everything you asked me to do:
1)I opened out the board and inspected the back, I dont see any cold solder or anything shot (pic attached), I did a slight twisting of the board as suggested.
2) The caps you had mentioned to check for polarity - everything perfect, infact I checked ALL caps on the both the boards and everything is soldered as it should be. (Pic attached)
3) I swapped the OP627 opamp with the new LM 4562 - No difference ( Seller had writteb back asking me to check this too)
4) switched from optical to coax - no difference
Observations - When the headphone is NOT attached but headphone switch on the ZERO switched ON ( with coax or optical ON) at very High Volume on the ZERO, I can hear Faint ( very fain) music on the Speakers.
NOW if I attach the headpnone on the ZERO, and SWITCH OFF, the headphone switch on ZERO and Raise the Volume, I can still hear music onmy headphone - again very faintly..
I have a feeling, that when I swiched on the ZERO for the FIRST time, with the Headphones ON, within seconds I heard like something being fried inside the ZERO and the lights dimmed.
I really dont think theres anything more I can do with my level of electronic knowledge...
Let me know, if theres anything else I can..
Thanks Peete and EVERYONE on the Forum !
Sandeep