Re: Honda generator inverter 230v 1900uf caps
I've decided not to waste money on the off chance that this one capacitor is the problem.
JFA
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Last Activity: 12-26-2021, 05:38 PM
Joined: 05-14-2011
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Re: Honda generator inverter 230v 1900uf caps
The board is not exposed, just the two tags that were part of the capacitor. The inverter just makes that squealing sound that inverters seem to make to indicate a fault. Removing the cap made no difference to the faulty inverter.Leave a comment:
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Honda generator inverter 230v 1900uf caps
I have a Honda generator with a faulty inverter. The inverter is encased in black resin with just the tops of a dozen small electrolytic caps and four 230v 1900uf electrolytic caps poking out of the top of the resin. The plastic cover of one of the 230v caps was burned off but there was no sign of bulging and the capacitor can was in good condition. The heat source looks likely to be from the outside rather than from the component itself but since the inverter is basically unrepairable, I chiseled away and removed the capacitor. I had to destroy the capacitor so had no chance to test it but it... -
Re: haier le42b1380 power supply issue
Came across this power supply in a TEAC 42" TV that was reported as intermittently turning off. When I got hold of the TV it was a hard fault with no 12 or 24v. Resoldered the connections of the two biggest transformers, both connections to the board and where transformer windings join to the connector pins and all is now good. Somewhere back in this thread is another person who repaired the power supply in the same way. If you are missing 12 and 24 volts, this would be a good place to start.Leave a comment:
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Re: Need help, Sony HCD-SB500W protection.
My hot air de-solderer finally arrived. All I managed to do was destroy the circuit board.Leave a comment:
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Re: Need help, Sony HCD-SB500W protection.
The readings between PVDDA and Out A, PVDDB and Out B, Out A and ground and Out B and ground are roughly 5Kohm for Front Left, Front Right and Centre. They are roughly 2.5Kohm for both Woofers except for PVDDB and Out B which are around 7Kohm for both woofers.
The protection kicks in now even with a headset plugged in. I don't know what any of this means but a new board is $250 so I am going to buy a cheap hot air de-solderer and go from there. Coming from China, it will probably take a good month to arrive so it will be a bit of...Leave a comment:
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Re: Need help, Sony HCD-SB500W protection.
Both, that is why I am loathe to pull either driver.Leave a comment:
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Re: Need help, Sony HCD-SB500W protection.
Well I've measured the output to the overload detect circuit and can't find a difference. I've also measured the voltages at the various speakers and found that the two front and centre speakers read zero but the bass speakers flick up to 3V before the protection circuit operates when it drops to zero. I can only check voltages on the IC once the protection circuit kicks in. If it was only one of the bass speakers reading, I would definitely expect it to be the culprit but I'm not prepared to pull two ICs without some further investiga...Leave a comment:
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Re: Need help, Sony HCD-SB500W protection.
Thank you. Each IC is worth around $25 in Australia and I can't see myself removing one without destroying it in the process.Leave a comment:
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Re: Need help, Sony HCD-SB500W protection.
There is an "Amp Test" shown in the service manual that I cannot get to run. Also, should the unit function without speakers connected, previous poster, Chungalin had difficulties.
How can I check which IC is giving me grief, assuming that one is?Leave a comment:
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Re: Need help, Sony HCD-SB500W protection.
I have one of these home theatre systems with the problem described. Everything works fine with a headset plugged in but without it, the protection system operates. I have checked the speakers and wiring and all is OK. I have tried with and without speakers connected and using the systems speaker setup, I have changed the system to only run on the front and centre speakers but the problem still exists. I assume that the muting function of the headset stops power to ICs 101 through 107 and that my problem is on the amp board. My skills and...Leave a comment:
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Re: Dell E172fpb
I have two different model BenQ monitors. Both have blown 3Amp fuses and both were full of cold solder joints so the manufacturer was having much more that one bad day. Both are now working again. What I want to know is why there is an inverter circuit in the monitors in the first place. These monitors are designed to plug into the mains. They have a ready supply of AC voltage just waiting to be transformed into whatever voltage the backlights require. Why rectify the AC to DC and then invert the DC back to AC? Maybe there is a reason but I can't think what it would...Leave a comment:
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