Recent content by phist1987

S5_PWR_EN at pin 1 R7552 is 3.415v

hi guys, im having some issue with this 820-3437 board,condition should be as below : plug in charger,green light, PPBUS_G3H fine at 8.56v PP5V_S5 at pin 1 C7505 is fine at 5.02v but PP3V3_S5 to wake the machine at pin 5 U8180 is missing. what created the pp3v3_s5? i check at PP3V3_S5_REG_R...

from the pic of the board that u send,it seems more like 820-3437,as from my knowledge,macbook air 13-inch mid 2013 board is suppose to be that number,while macbook air 11-inch mid 2013 is 820-3435. but the pic doesn't look like 820-3435 at all.

hi aprendiz pin 27-28 = 20.1ohm pin 17-18 = 3.6ohm

Merry Christmas to all i have a unit of 820-00165-A,magsafe light is on,ppbus_g3h usually get 3.++v only,but sometimes after plug in the charger for long time or try to plug out and plug in charger for several times,can get 8.54v here the measurement that i get when the PPBUS_G3H is 8.54v...

did PRAM,nothing,even backlight also doesnt turn on. removed everything except fan and i/o magsafe,fan spinning,plug in usb mouse (cable) no light,put usb drive,got 1 time led blink and none after that.when measure the pin,power rail got 5.1v,the 2 middle pin got some mv,around...

had a 820-3476-A board,status as below Machine has no water damage history machine was fully functioning (our own board actually),used to test on another machine. One junior came,take the board,put into one machine which has history of water damage,can't turn on but all corroded part replaced /...

there is no corrosion

measured,get 3.415v

on board (without removing the resistor) R6102 = 88.2kohm (way below) (if i put multimeter probe the other way around,get only 63.4ohm) R6116 = 15.3ohm (ok) R6115 = 15.2ohm (ok) R6128 = 25.1ohm (ok) R6126 = 42.9ohm (ok) R6121 = 43.1ohm (ok) R6125 = 42.9ohm (ok) R6120 = 42.9ohm (ok) R6101 =...

yeah its normal that it start and stop for 3 times before its fully running....but this time the fan run for 2 second and thats all...nothing more.... also its actually water damage,cant turn on,repaired by me last time (changed few chip which i dont remember already,can work for few days,but...

do have a 820-3437 board,plug in charger 1. charger LED indicator orange,fan spin 2 second and stop. 2. PPBUS_G3H at F7700 pin 1 = 8.57v 3. PPBUS_S5_HS_COMPUTING_ISNS at R5450 pin 1 = 8.57v 4. PP3V3_S5 at U3560 pin 5 = 3.325v 5. PP15V_TBT at D3095 pin 2 = 0.00v 6. PPBUS_S5_HS_OTHER_ISNS at...

i have a 820-3476-A logic board,condition as title. PPBUS_G3H at R7005 pin 1 = 1.663v resistance mode PPBUS_G3H at R7005 pin 1 to L7310 pin 1 = 45.0ohm slowly increasing PPBUS_G3H at R7005 pin 1 to GND = 4.3ohm any idea?

:( im just using magnifying glass all this while because company dont want to give budget...so lucky still can repair plenty of board using it...

hehe...seems like i have to keep this board for quite some time...as im still looking for a good power supply as i don't own one....just started doing simple board repair without enough equipment (company doesn't want to give budget for logic board repair research,have to come out from my own...