MobileXT
Badcaps Veteran
Last Activity: Yesterday, 04:34 PM
Joined: 10-23-2012
Location: USA
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I think this donor board is a rabbit hole maybe that’s why the previous owner sell it for parts. I knew this board its been repaired before but unsuccessful. I have a working amp board so I will swap it and see what was wrong with the TWamp. I believe this could be another rabbit hole.Last edited by MobileXT; 09-19-2025, 03:06 PM. -
Voltage Across C118= 167V
No shorts for Q106 and Q107
Voltage On C184= -81.7v
Voltage on C127= -81.4V...Leave a comment:
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I believe there’s no power rails on all secondary but will double check again....Leave a comment:
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All the power supply is there I’m guessing is the audio line is broken somewhere. I already replaced the TDA still same problem so is not the TDA. I will double check again all the power supply on the T-AMP....Leave a comment:
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No short to C137 and C138 same reading on the working amp also Q106 and Q107 same reading on the working board also same on all reading on all PIN on IC101 same as the working amp.. Where the -55V and +55V generate? is this from the T102? and the T102 controlled by IC101?Leave a comment:
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Another updates: I received my complete donor for DXR15 amp so I removed the tweeter amp and replaced my old one and now everything is working now two speakers back to life. So Now I like try to fix the donor amp that the problem was not turning on. No green lights missing the -55V and +55V. Also want to fix the tweeter amp. But I like try to fix the AMP board first then the tweeter amp.Leave a comment:
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I think I found the Problem on the RA711 Pin7 3v3 PIN 8 3V, PIN5 3V3 PIN6 3V, PIN3 3v3 PIN4 0V, PIN1 3v3 PIN2 0v. Where I can get this array resistors I try google I can't find anything mouser & digit key the parts number is WH211800.Leave a comment:
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The most common problems on these machines are those underlying glue. Make sure you clean up everything on those caps and pull up resistors around the nand chip make sure nothing’s left. Otherwise you will have the same error on the Apple Configurator.Leave a comment:
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