MeTech Turkey
Member
Hello Everyone,
One of my customers brought me a macbook air A2337 , board number 820-02016. When I plugged it in I can see that it stays around 5.170V and amp goes up to between 0.27 and 0.388 and back to zero again. And it is on a loop like this. When I measured the
CF505 on PP1V5_UPC1_LDO_CORE = 1.5V Stable,
CF508 on PP3V3_UPC1_LDO = 3.5V Stable,
CF500 on PP3V3_S2_UPC = up and down between zero and 0.2V but it goes up partly and goes donw again partly (I mean partly every 1 second it goes down to zero then goes up 0.1 then zero and 0.11 and back same way down from 02.V)
CF402 on PP1V25_S2 = between zero and 0.5 (same as CF500)
R8441 on UPC_PMU_RESET_3V3 = around zeroV
CC337 on PP5V_S2 = 0.001V
RF235 on UPC1_5V_EN = 0.13V
RF901 on USBC1_3V3LDO_EN = 0.0V
Just because of these I thought the problem is UF500 but do I miss something else or am I right? Want to check with you guys anyway.
Thank you for you help in advance.
Emre
One of my customers brought me a macbook air A2337 , board number 820-02016. When I plugged it in I can see that it stays around 5.170V and amp goes up to between 0.27 and 0.388 and back to zero again. And it is on a loop like this. When I measured the
CF505 on PP1V5_UPC1_LDO_CORE = 1.5V Stable,
CF508 on PP3V3_UPC1_LDO = 3.5V Stable,
CF500 on PP3V3_S2_UPC = up and down between zero and 0.2V but it goes up partly and goes donw again partly (I mean partly every 1 second it goes down to zero then goes up 0.1 then zero and 0.11 and back same way down from 02.V)
CF402 on PP1V25_S2 = between zero and 0.5 (same as CF500)
R8441 on UPC_PMU_RESET_3V3 = around zeroV
CC337 on PP5V_S2 = 0.001V
RF235 on UPC1_5V_EN = 0.13V
RF901 on USBC1_3V3LDO_EN = 0.0V
Just because of these I thought the problem is UF500 but do I miss something else or am I right? Want to check with you guys anyway.
Thank you for you help in advance.
Emre