820-3437 no pm_slp_s4_l

Yoel Ren

Member
hi, this board came in, pretty clean.
ppbus_G3h 8.6v
pp5v_s5 stable 5v
pp3v3_s5 3.3v but cycling.
I notice ppvrtc_g3h diode mode is 0.030 or so (70 ohm), I found one caps which is leaking.
now diode mode is 0.104 ( about 200 ohm resistance to ground ). ppvrtc voltage is 3.2v
I compare to 3435 from another working board, its a few M Ohm at least, is this still ok ?
PCH_srtcrst_L: 3.1v
pch_intruder_l : 1.1v
pch_intvrmen : 0.4v
rtc_reset_l : 3.3v
 

2informaticos

Administrator
Staff member
"pch_intruder_l : 1.1v
pch_intvrmen : 0.4v"
Both values are incorrect.
The bad news, there are no caps connected, only PCH.
If series resistors are good, heat PCH to 180-200 degrees for 15-20s; use quality flux, tu burn eventually crap accumulated underneath.
 

Yoel Ren

Member
i put 330k instead of 1m, voltage increased from 1.1v to 1.3v
i put 20k intead of 330k, voltage increased from 0.4v to 0.6v

i tried jumpering, just for testing, if i jump pch_intruder_l, it can maintain 3.3v
if i jump pch_intvrmen,it will pull the entire ppvrtc_g3h to 1.2v.
 
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