820-01700 Not turning on

mastak07

New member
I have what I thought was a clean 820-01700 board not turning on. After close inspection under a microscope I could see there was a tiny amount of crap on F7000 chip. With the power plugged in the board is sitting at 1.33v and not turning on. Could you please tell me where I should go to from here? Just replace F7000?
 

2informaticos

Administrator
Staff member
F7000 is just a fuse, as F7001 too; does it have continuity?

Post diode mode to ground at PPBUS_G3H (F7000 pin 2).

Any volatge at R7020 at least?
Do you get 3V3_G3H?
 

2informaticos

Administrator
Staff member
"diode mode to ground at PPBUS_G3H = 067"
Do you mean 0.067, or 0.67?
0.067 is really bad.
Check if any coil gets the same value.
 

mastak07

New member
0.67

coil (L7030? is this the coil/inductor to measure? sorry im a noob so I've been reading the Rossmanngroup repair guide but I couldn't find anything about coils) gets 4.02 in diode mode
 
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