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(SOLVED) 820-00923 no power no 1v1 LDO

Jeffotskie26

Jeffotskie26

Member
hello im back i have a1706 no power no sign of liquid.

PPBUS_G3H 0V 0.430
PP3V3_G3H 0V 0.366

all 1v1 ldo is 0V on all cd3215c00

also i didnt see any shorted caps on other parts.
 
Last edited:
Jeffotskie26

Jeffotskie26

Member
2informaticos said:
Do you get 5V at USB-C meter?
Also check voltage at R7020.
Click to expand...
yes got 5v on all usb ports. 5.07V 1.37amp freeze, stable to be exact

PPDCIN_G3H and PPDCIN_G3H_CHGR both are 5v as well.

BTW i changed U7000, u3100, ub300 came from working board nothing changes.

can you help what to do next.
 
Last edited:
Jeffotskie26

Jeffotskie26

Member
2informaticos said:
Compare diode mode readings on LDO rails between all CD32115 chips.
Click to expand...


do u mean this???

U3200
PP3V3_UPC_XB_LDO 3.3v, 0.506
PP1V1_UPC_XB_LDO_BMC 0v 0.517
PP1V8_UPC_XB_LDOA 1.8v, 0.525
PP1V8_UPC_XB_LDOD 1.8v 0.486

U3100
PP3V3_UPC_XA_LDO 3.2v 0.503
PP1V1_UPC_XA_LDO_BMC 0v 0.509
PP1V8_UPC_XA_LDOA 1.8v 0.519
PP1V8_UPC_XA_LDOD 1.8v 0.483

UB300
PP3V3_UPC_TA_LDO 3.3v, 0.503
PP1V1_UPC_TA_LDO_BMC 0v 0.514
PP1V8_UPC_TA_LDOA 1.8v, 0.521
PP1V8_UPC_TA_LDOD 1.8v, 0.485

UB400
PP3V3_UPC_TB_LDO 3.3v, 0.506
PP1V1_UPC_TB_LDO_BMC 0v, 0.504
PP1V8_UPC_TB_LDOA 1.8v, 0.528
PP1V8_UPC_TB_LDOD 1.8v, 0.492
 
2informaticos

2informaticos

Administrator
Staff member
I don't see big differences.

Now is time to get 3V3_G3H; if not, no way to switch to 20V.
Post U6903 voltages.

BTW, I don't see any reason to quote an entire post, visible few centimeters above; nor even if is so short.
 
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