Date Range
Date Range
Date Range
Marantz CD52 MKii drawer repair and modification. Friday, 8 February 2013. Quick update to explain what those regs are doing! Probably repeating myself a bit here but hopefully this will help in following the principle. Hopefully the 1st 3 pins are obvious. The other 2 are pretty straight forward too. NOISE REDUCTION - connect via 0. Saturday, 2 February 2013.
Marantz CD67 OSE modifation details. Monday, 5 March 2012. Modding the Marantz CD67 OSE. A few upgraded capacitors over the standard model. A new low noise low Jitter system clock drive timing in the digital domain. The original system xtal is replaced by a low jitter oscillator driven by its own low noise regulation. This improves overall accuracy in data processing and has a profound effect on detail presentation. Finally,Closed cell Mechanical case damping .
Saturday, 19 May 2012. Reverse Engineering the power rails! Spent a fair bit of time identifying various devices on the main board. There are 3 linear voltage regulators related to the DAC, clocking and audio processing. U18 voltage regulator for the codec chip U12 Wolfson WM8974. U21 is the 5V voltage regulator for the AKM4420 DAC both analogue and Digital. Its also provides the 5v feed for the touch screen.