Re: Yamaha RX-V673 power problems
Thanks, yes the ~ on the schematic confused me there thats why i wasn't sure. Checking the IC list, and specifically the datasheet of D3704 was part of that.
I didn't understand that part properly but for sure they would blow if there would've been 90V going to them.
C3706 has 315V, that makes sense.
Can the R3704 be tested in the circuit?...
Coldstream
Member
Last Activity: 05-21-2024, 09:41 AM
Joined: 03-25-2018
Location: Hengelo
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Re: Yamaha RX-V673 power problems
I can't edit my previous message, so sorry for double posting. Just wanted to add that with replacing C3708, the power there is stable 1.3V
Am i right thinking that D3704 gets it's 90VAC from the transformer (which it indeed does) and should put out 90V which goes to C3713, C3714 & C3715.. As it doesn't put out any V that entire part stays dead giving the problems we get? Or am i overlooking anything just here.Last edited by Coldstream; 03-27-2018, 07:13 AM.Leave a comment:
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Re: Yamaha RX-V673 power problems
Both are at 0V somehow.....Leave a comment:
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Re: Yamaha RX-V673 power problems
Still busy finding my replacement, will be done very soon. Odd thing is my fluke tells me it's 20.4uF at the capacitor? That makes it seem like it's okay ?...Leave a comment:
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Re: Yamaha RX-V673 power problems
Sorry, need to correct myself, there is 1.1v at C3708Leave a comment:
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Re: Yamaha RX-V673 power problems
C3706 is at 315v, C3708 has nothing. Sounds like thats part of the problem, should i replace it?Leave a comment:
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Re: Yamaha RX-V673 power problems
You want me to check how much voltage goes to it, or how much it holds? sorry for the confusion
Looking for replacements right now, i'm just not sure if its only the 5.5v line as i'm also reading odd things at the 12v line, but this can be like above said because it doesn't switch?...Last edited by Coldstream; 03-26-2018, 02:45 PM.Leave a comment:
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Re: Yamaha RX-V673 power problems
Sadly nothing, i can't get any voltages at CB376. Nothing at all, for some reasonLeave a comment:
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Re: Yamaha RX-V673 power problems
Thanks, but sadly i dont have any C405 in my unit. Any idea which part might provide standby voltages in my unit?...Leave a comment:
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Re: Yamaha RX-V673 power problems
Yes, i can confirm the main power transformer gets 230VAC and puts out 90VAC. The thing that puzzles me is simply that both the 12v and the 5,5v lines are nowhere near enough.
I guess this is also why the relay doesn't work, but what confuses me the most is that even the front panel doesn't work anymore. No power led, no posibility to get in to the diagnostic mode.
Power around the power switch is in the 3. range, just like the relay. Thats why i suspect i got a problem very early on in the circuit right now.Leave a comment:
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Yamaha RX-V673 power problems
Hello everyone,
I'm stuck finding the problems on this Yamaha receiver, i suspect a few things but after messing around the whole weekend it seems like i'm getting on a dead end. Must say, that i've not much experience with these newer devices and i'm a bit rusty.
First of all, i got this device from my friend.. The receiver's fuse went dead when he was just watching a movie.
So obviously, my first step was to get into the diagnostic mode (power sw+info+tone control from my head) and there it went fine with an error P2 (power supply 2, 34L 3.4 volt LOW?) i thought P2 should've... -
Re: New Members - please post your introductions here
Hello everyone, i've also just registered on this forum. I've been lurking here quite a few times already and this site is a great source for a lot of things.
I'm probably not the most technical informed person around here, but i'll se if i can help out others for sure.
Been DIY-repairing quite a few times but it has been a few years ago.
But sadly i'm stuck sometimes with a few repairs, thats why i often come around on this site.Leave a comment:
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