[#25]
Re: hdd a590 - problem z uruchomieniem
@mkdevil666,
post #24
dobra, i wszystko jasne, chyba nie jest tak zle jak myslalem...
jedyne co to za cholere nie moge znalezc JP8 na tej plycie, jestem chyba slepy... ty to widzisz gdzies?
brakujacy chip to tzw Ramsey, ale tak jak ponizej napisane, jest on potrzebny w zaleznosci od modelu U1
ja mam chip 02, ty masz chip 01
The A590 Service Manual, which is available on the web, doesn't actually refer to a U30, but it does refer to U101 which appears to be the same thing. Looking closer at the component parts list, there appears to be 2 configurations:
(1) The main chip U1 is 390563-01. The chip U101 (aka U30) is 390398-01 and installed. The jumper JP8 is left open.
(2) The main chip U1 is an enhanced version 390563-02, which probably includes the logic contained in U101. Therefore the chip U101 (aka U30) is not needed and not installed. The jumper JP8 is closed.
So this explains why some A590 units have the U30 chip, and some don't. For some reason they needed to initially ship the original U1, but later on they could ship the enhanced U1 with combined logic. The A590 PCB was designed to take either version of U1.
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