I have a Yamaha receiver and the self diagnosis points to a faulty bridge rectifier activating the self protection circuit. It calls for a TS6P03G 6A 200V. The size is very specific as I have discovered and I can't find one any where. Would it be safe to deviate from the amp rating? The volts? Here's the data sheet on what I need: https://www.mouser.com/datasheet/2/3...15-1115464.pdf. Do I need to keep turning over rocks till I find this bridge rectifier? Thanks for any help.
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Re: Bridge Rectifier Question
Are you sure it's the bridge rectifier ? I wouldn't expect the receiver to turn on if it has failed. -
Re: Bridge Rectifier Question
You can test the four diodes inside the bridge if you pull the part.
If in-circuit testing, be careful the big filter caps are discharged so they don't zap your multimeter. Those big caps cause a long delay getting a Vf reading, but it sounds like you suspect an open diode. A shorted diode would pop the main fuse.
Protection circuit trip is most likely a failed power amplifier.
Consider GBJ series of bridge rectifiers, like a GBJ1002 10A 200V or higher PIV, in that same package.Comment
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Re: Bridge Rectifier Question
Model number of the YAMAHA will help also.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
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Voltage Regulator (LDO) testing:
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Inverter testing using old CFL:
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TV Factory reset codes listing:
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Re: Bridge Rectifier Question
Rx-v479Comment
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Re: Bridge Rectifier Question
The flow chart seems to point to excess heat from the bridge rectifier tripping the protection circuit. The only way I could turn the receiver on for more than 5 seconds was to use protection cancel mode and run through the self diagnosis. The power amplifier could be it as well. I'm attaching some mroe images.Attached FilesComment
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Re: Yamaha RX-V479: Bridge Rectifier Question
Nah, if the bridge rectifier is shorted, there wont be any power at all. Not even for a split second. I think there is something else shorted on that +51V or -51V line that sucks all the power away. So I suggest you look at the amp section first and look for shorted transistor(s) output, driver and predriver.Comment
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Re: Yamaha RX-V479: Bridge Rectifier Question
Heeding CapLeaker's advice I started working back from the bridge rectifier and pulling and checking components. The first things are two big caps both 8200uf 63v. They both test within 8% of the 8200uf but they both show 0.00 ESR on my Peak ESR70 meter. Is that normal for an audio capacitor? I checked them both with an ohm meter and one shows .OL and the other shows 2.395 M ohms and climbing.
Thanks for your sage advice.Comment
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Re: Yamaha RX-V479: Bridge Rectifier Question
these are fine. What DC voltages are you measuring one those caps when you turn the amp on? These aren't audio caps, these are just the secondary filter caps for the 51V and minus 51V supply for the amplifier stage (transistors i mentioned before).
With the amp off and unplugged, turn your DMM to Diode mode and check the big output transistors for a short. Same thing on the driver transistor and the pre driver transistors I am betting on one of these transistors is shorted, putting the amp in protection mode. You can compare the left channel to the right channel.
The second last amp I repaired had a blown pre driver transistor that had failed.Last edited by CapLeaker; 08-12-2018, 01:06 PM.Comment
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Re: Yamaha RX-V479: Bridge Rectifier Question
I've only checked one of the big transistors so far and it was fine and I haven't had a chance to pull any others yet. I will later this week and let you know what I have found. Thanks again for the advice!Comment
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Re: Yamaha RX-V479: Bridge Rectifier Question
I got side tracked by life a few times the past couple of weeks. I have been pulling transistors and testing them, a lot of them, and so far I haven't found a bad one. I've been looking up their data sheet and using this guide to test them: https://vetco.net/blog/test-a-transi...04-12-25-37-07Comment
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Re: Yamaha RX-V479: Bridge Rectifier Question
transistors do not only fail short, but the can act as if there is another diode, while there shouldn't be any. That's what happened to that other amp that I repaired.Comment
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Re: Yamaha RX-V479: Bridge Rectifier Question
I have pulled and tested dozens of transistors and all of them tested good. I bought a Peak DCA75 and double checked them, all good. The bridge rectifier tested good. I don't see any sign of a bad cap. Thoughts?Comment
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Hi all, a newby question about a bridge rectifier I'm trying to identify.
I'm in the midst of reparing a battery charger in work which went pop, The bridge rectifier has shorted and took out a couple of other components. The rectifier in question has a part number KPB305G, and it looks like it's obsolete. Does any one know what I could replace it with?... -
Hello
My Fujitsu Esprimo Q556 motherboards blew up. At least fuse, bridge rectifier and capacitor got damaged. I have changed fuse and bridge rectifier (DF1508S), but I don't know what capacitor it is (picture). I know that capacitors size is 47nF, but I don't know other specs for it. Can you help me to choose right capacitor for my motherboard?
There is 240V AC on input side of bridge rectifier and 340V DC as output on capasitors side.
Thanks.... -
I have a 40 volt AC transformer that I put a bridge rectifier on, and I wanted to see the input signal and the output signal on the same screen on my scope, so I set one channel up with the test lead on one side of the input and the ground lead on the other side of the input, then I used another channel on the scope and clipped the test lead on the positive side of the output then the ground on the negative side of the output.
When I connected the transformer to power, the wire that was connected between the ground lead on the second channel and the negative side of the bridge rectifier... -
Hi,
I'm learning about motherboard repair and I believe I've traced the issue down for the South Bridge on the particular motherboard I'm working on. My path of concluding that:
- There's no sign of any attempt to power on when pushing the power button.
- No PSON signal is reaching the 24-pin ATX connector.
- The Super IO chip is receiving the PS_SWITCH signal from the power button and is relaying this signal back to the South Bridge.
- The Super IO is not receiving the S_SLPS#_R signal back from the South Bridge
- If I pull the Super IO S_SLPS#_R pin... -
Hi, a friend of mine gave me this broken power supply, aparently it's the rectifier bridge that was damaged months ago. He took it to a technician and they didn't have the repair tools necesary but they remove the original bridge rectifier since it was damaged(burned). I have some of this rectifiers laying around, but they are not the same. The original its a pair of GBJ1506
And I have KBL06 , KBL406 , RVB406, D5SBA20, D3SBA60, GBU608. Most of them have similar values to the original, but I'm not planning to use the PSU at full load (ie: SLI, an I7 processor, etc).
TomsHardware...
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