KC Micro Tronix
Member
OK. I have been to hell and back on this board! I know that I am kind of new at this but OMG this board is a bitch!
I did discover some water damage around U7501 but this area has been worked twice now and my 3V3_S5 rail is good.
MagSafe light good
PP3V3 S5 good
P3V3SUS_EN Bad
SYSCLK_CLK25M X1 & X2 missing ( Y1905 crystal is doing noting. Occasional weird pulse no sine wave )
U1900 & Y1905 replaced. (because I am mentally lazy)
U1900 VDD Good 3.3V
U1900 PP3V42_G3H good 3.3V
U1900 P3V3_S5RS3RS0_SYSCLKGEN good 3.3V
U1900 PPVRTC_G3H output good 3.3V
U1900 PP3V3 S5 rail input good 3.3V
U1900 PP3V3 TBTLC missing Voltage is 0.45v I checked for shorts. I am not totally sure what the hell TBTLC means. I seems to be power for U2890 and U2060
U1900 PP1V2_CAM_XTALPCIEVDD missing. I don't care about a camera right?
U1900 PCH_CLK32K_RTCX1 missing. "as to be expected in this state"
I have checked all the local resistors
is it possible that my harvested crystal is also bad? I never see these fail unless dropped.
I just don't have enough experience in this area. Would appreciate guidance.
I have tried to find a data sheet on this chip without success.
I think I am in a rabbit hole and lost!
I did discover some water damage around U7501 but this area has been worked twice now and my 3V3_S5 rail is good.
MagSafe light good
PP3V3 S5 good
P3V3SUS_EN Bad
SYSCLK_CLK25M X1 & X2 missing ( Y1905 crystal is doing noting. Occasional weird pulse no sine wave )
U1900 & Y1905 replaced. (because I am mentally lazy)
U1900 VDD Good 3.3V
U1900 PP3V42_G3H good 3.3V
U1900 P3V3_S5RS3RS0_SYSCLKGEN good 3.3V
U1900 PPVRTC_G3H output good 3.3V
U1900 PP3V3 S5 rail input good 3.3V
U1900 PP3V3 TBTLC missing Voltage is 0.45v I checked for shorts. I am not totally sure what the hell TBTLC means. I seems to be power for U2890 and U2060
U1900 PP1V2_CAM_XTALPCIEVDD missing. I don't care about a camera right?
U1900 PCH_CLK32K_RTCX1 missing. "as to be expected in this state"
I have checked all the local resistors
is it possible that my harvested crystal is also bad? I never see these fail unless dropped.
I just don't have enough experience in this area. Would appreciate guidance.
I have tried to find a data sheet on this chip without success.
I think I am in a rabbit hole and lost!
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