Nice work ! Definitely sounds like that player needs some proper (‘by the book’) calibration on the tracking and focus. The other demodulator that wasn’t working, is it faulty or just didn’t work with the mod ? I’d be interested to know the voltage of the signal coming out of the mod board to the Coax.
Thanks for commenting. The Marantz was definitely bad. I’ll make a video on that as well, haha. I tested the Marantz on 3 separate players. Voltage coming out was 4.5Volts. I was surprised it wasn’t lower given Sony rep for AC3 voltage difficulties.
How did it perform when hooked up with speakers? My old MDP-455 mod from years ago was a problem due to the lack of a “mute” connection on the AC3 board and I would occasionally get a loud bang of sound on my speakers prior to disc start up. After that, the disc would play fine until the next side break and I have the loud bang again depending on the disc played. I’m not sure if it’s just a Sony thing which is why I ask. I ask others who have modified Pioneer units without “mute” added and they seem fine. Nevertheless, all the mods I have done since incorporates the mute circuit and I have never had the “rude awakening” since then 🙂.
Nice work ! Definitely sounds like that player needs some proper (‘by the book’) calibration on the tracking and focus. The other demodulator that wasn’t working, is it faulty or just didn’t work with the mod ? I’d be interested to know the voltage of the signal coming out of the mod board to the Coax.
Thanks for commenting. The Marantz was definitely bad. I’ll make a video on that as well, haha. I tested the Marantz on 3 separate players.
Voltage coming out was 4.5Volts. I was surprised it wasn’t lower given Sony rep for AC3 voltage difficulties.
How did it perform when hooked up with speakers?
My old MDP-455 mod from years ago was a problem due to the lack of a “mute” connection on the AC3 board and I would occasionally get a loud bang of sound on my speakers prior to disc start up. After that, the disc would play fine until the next side break and I have the loud bang again depending on the disc played.
I’m not sure if it’s just a Sony thing which is why I ask. I ask others who have modified Pioneer units without “mute” added and they seem fine. Nevertheless, all the mods I have done since incorporates the mute circuit and I have never had the “rude awakening” since then 🙂.
Good point on the Sony models. I'll take a look tonight and update here.
Can you confirm the tap point for RF is EQ203?
You are correct, it's Q203