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ARCHIVED FORUM -- April 2007 to March 2012
READ ONLY FORUM
This is the first Archived Forum which was active between 17th April 2007 and
1st March February 2012
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Here is the finished 02 Module also showing the final recap for that board, the C65, 47uF capacitor.
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On the trace side of the 02 Module there is one medium size axial electrolytic capacitor - C49, 1000uF that has to be replaced. The old one measured 1440uF on my capacitance ESR meter. The new one measured 994uF. In the picture the old on is in the top frame, the new one on the bottom frame.
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Here are a couple of pics of IC8 and C2 replaced on the 02 Module. The IC8 component I took out is shown on the anti-static sponge (just to hold it in the picture). I decided to install an 8-pin IC socket for the IC8 component. I had one and I figured it would make it easier to replace if it fails again.
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I decided to start with the 02 Module. First the replacement of the IC8 U264B component. To un-solder this 8-pin IC the metal cover on the trace side of the 02 Module has to be lifted off. The metal covers are just friction fitted to the frame so the should come off with some coaxing. No need to bend anything. This picture shows the IC8 from the component
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Finally. I can get to IC8 and all of the electrolytic capacitors on 02 and 03 that have to be replaced. Once those are done I should be in the re-assemble mode and on the way to getting this nice receiver operating again. Got to remember to do the idle voltage and DC offset adjustments at the end. That will all have to wait until tomorrow though. Note
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To remove the 02 and 03 modules from the frame I released the volume pulley string from its pulley (again). There is a tab on the frame that prevents the 03 module from sliding out of its attachment slots. I carefully pressed the 03 board over that tab stop as I moved the 03 board to the right (when looking at it from the inside). The came right out
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I decided to loosen the motor and pulley assembly that is attached to the 03 module. After doing this I don't think I really needed to do that. In the last frame of this picture you can see a spring attaching the volume pulley string to the pulley. That needs to be released and removed so the motor belt can be changed so there is enough give in
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If all I had to do was recap the 03 module I could probably do it right now. However, I also need to do the 02 module and change IC8 on the 02 module. In addition, I need to change out the belt on the volume motor. This picture shows what is exposed now. I can see the 02 and 03 module fronts and backs. The 02 board gives me a problem because the IC8
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Here is the 04 module removed