Video Asylum

RE: Ahh, pixel turn on/off time.....

218.186.10.12

wlee

In Reply to: RE: Ahh, pixel turn on/off time..... posted by unclestu52 on August 17, 2007 at 20:32:45

Ok got it, tks!
I always wanted to tweak the inside. The PS was out about 2.5 years ago, I managed to get NEC to repair without charge and asked them to make sure no PS failure. The problem with Singapore is that the AC supply is at 237v-243V. So lots of appliance easily got knock out as most of them are for the UK 230V and China/HK 220V!
Beside, I wanted to improve the sound of the amp inside. I am sure just by changng the rectifier diode to Fr type and replaced the output lytic caps (of the class D amp) will improve the sound.

WLee

Follow Ups:

Inside - unclestu52 19:31:22 08/18/07 (1)
is a mess, and everything seems to be surface mount devices, which my old eyes can't seem to even distinguish apart from each other. Well, not really since everything is on separate cards by function, but space is really at a premium.

I use a lot of power supply conditioning (the new Bybee Golden Goddess AV tail is quite nice!) but even using a RGPC and other filter types seem to help things a lot.

Good Luck

Stu
- RE: Inside - wlee 23:07:33 08/18/07 (0)
  Yes, am getting old eyes too, now when I solder I need to take off my glasses and put up a lot of lights! So I must have mre then 10 LED flash lights...
  What I did usually was to replace the rectifiers with the FR type, increase the caps right after the FR AC rectification, before the switching is done. It does improve the sound a lot. I tried plaing 0.047 uf Russian Teflon there, and yes I could here the sound becomes cleaner and clearer. Of course iwill also try to find out which parts to eliminate, such as op amps and lytic path coupling caps.
  I recently bought a Pioneer A600 DVD players, and the surface mount parts is perhaps half of the usual SM types... I think my time to tweak is probably numbered!!
  
  Best Rgds
  
  WLee

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