Ok, keep it to yourself, thanks for trying.
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wharfedale titan sub a12
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I found navigating the site 'extremely' difficult.
When I finally achieved the "Take the Test' phase, I blew it.
5 out of 6 correct.
Bing Translate worked kinda o/k.
But it kept erasing my log in ID.
The 'Test' was tough because Bing Translate epic failed at translating the equations,
Anyway, I have a valid log in, I simply have to get by the 'Test'.
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Dear Jazz P Bass, you probably remember that we discussed one of the issues on Q Jerry's thread, a couple of months ago. That is the most common issue with the amp itself. Now, I would like to point out to 2 typical problems with the power supply.
1. The mosfet driver IC DT5268S, in some cases, is very unstable. Even at a temperature that is a little bit higher than a room temperature, it develops symptoms like random shutdowns, or early limiting. These symptoms appear very rarely in the beginning, maybe once or twice per event. But they intend to build up. Ultimately the whole PS fails, shorting the MOSFET's. If the customer reacts in time, you can simply replace the DT5268S with it's quality equivalent, the IR 21531.
2.The other problem is a classic component-fail-due-to-vibrations. Visually inspect C13 - 1uF/250V and glue it to the PCB if necessary. Luckily, if that component fails, the only symptom is that the PS will not start, causing no further damage. Inspect also the amplifiers output low pass filter coil L 501. Heavy coil+vibrations not a very good combination if not fixed properly.
Good luck.Last edited by paleeman; 02-03-2013, 10:24 AM.
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