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820-01041 5v

S

Sr. Robot

Member
820-01041 with no signs of damage.

i get 5v on 3 ports and 20v on the XA port.

There are no shorts to ground on any of the LDO lines on the CD3215 chips.

When on the XA port:

PPBUS_G3H = 12.24v but still no boot.
 
2informaticos

2informaticos

Administrator
Staff member
Do you get correct LDO voltage on all LDOs?

Compare diode mode readings, between all channels; not always only short is bad.
 
S

Sr. Robot

Member
I replaced UB090 just in case, but no change.

Note: i did test each 1v1 line with its corresponding port connected. All other LDO lines have correct voltage.
 
S

Sr. Robot

Member
Sorry, i made a mistake, one of my probes was displaced and the multimeter was not reading correctly.

I do get 1v on the 1v1 ldo lines except on UB300 (the only port that has 20v).
Replaced UB300 but no change.
Diode mode on PP1V1_UPC_TA_LDO_BMC is still 0.450.

No history available.
Tested board with charger battery but no boot, ppbus is 11.3v
 
S

Sr. Robot

Member
PP1V8_SLPS2R = 0v / Diode mode = 0.368
PP1V1_SLPS2R = 0v / Diode mode = 0.230
PP0V8_SLPS2R = 0v / Diode mode = 0.172

PPVDDCPU_AWAKE = 0v
PPVDDCPUSRAM_AWAKE = 0v
PP1V8_AWAKE = 0v

not recognized in DFU mode
 
S

Sr. Robot

Member
PP1V1_SLPS2R = 0v
PP3V3_G3H_RTC_X =3.3v
PP1V8_SLPS2R = 0v
LDO_CORE = 0v
PP0V8_SLPS2R = 0v
PP3V0_G3H_RTC = 0v
PP1V2_AWAKE = 0v
PMU_LDO3_OUT = 0v
LDO_RTC = 0v
 
S

Sr. Robot

Member
Diode mode U7800 LDOs:

PP1V1_SLPS2R = 0.233
PP3V3_G3H_RTC_X = 0.374
PP1V8_SLPS2R = 0.368
LDO_CORE = 0.325
PP0V8_SLPS2R = 0.170
PP3V0_G3H_RTC = 0.388
PP1V2_AWAKE = 0.461
PMU_LDO3_OUT = 0.545
LDO_RTC = 0.325

R7900 was fried, replaced it.

PP3V3_G3H_RTC_X is now pulsing to 3.1v instead of stable.
PP1V8_SLPS2R pulsing to 0.8v
LDO_CORE pulsing to 2.1v
PMU_LDO3_OUT pulsing to 2.1v
LDO_RTC pulsing to 2.8v

i dont get 20v anymore on PP20V_USBC_TB_VBUS but 5v.
 
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