Hey there,
Prologue:
I'm 4 days into component level repairs, still on my fist board an 820-00165-02 (coffee damage), no severe corrosion anywhere. I have (to the best of my knowledge) many of the "basic" rails present (see list below). However I'm failing at PP3V3_S4SW_SNS which is just showing 0,2 V (No short in diode-mode unplugged). According to schematics for 820-00165-A PP3V3_S4SW_SNS comes from U8050, however i´m missing the enable SMC_SENSOR_PWR_EN (no short in diode-mode unplugged).
Question(s):
1. As I'm following schematics for 820-00165-A what differences should i expect since i´m working on a 820-00165-02 board?
2. Finally the most obvious: Why no SMC_SENSOR_PWR_EN/PP3V3_S4SW_SNS.
Thankful for any help or tip.
I have the following rails:
PPBUS_G3H 8,6 V
PPBUS_S5_HS_COMPUTING_ISNS 8,6 V
PPBUS_S5_HS_OTHER_ISNS 8,6 V
PPDCIN_G3H_ISOL 15 V
PPDCIN_G3H 15 V
PP3V42_G3H 3,42 V
PPVRTC_G3H 3,33 V
PP5V_S5 5 V
PP5V_S4RS3 5 V
PP5V_S0 5 V
PP3V3_S5 3,3 V
PP3V3_S4 OK 3,3 V
PP3V3_SUS 3,3 V
PP3V3_S3 OK 3,3 V
PP3V3_S0 OK 3,3 V
PP3V3_S4SW_SNS 0,2 V
PP3V3_S0SW_SSD 3,3 V
PP3V3_S4_TBTAPWR 3,3 V
PP1V8_S3 1,8 V
PP1V2_S3 1,2 V
PP1V05_SUS 1,05 V
PP1V5_S0 1,5 V
Prologue:
I'm 4 days into component level repairs, still on my fist board an 820-00165-02 (coffee damage), no severe corrosion anywhere. I have (to the best of my knowledge) many of the "basic" rails present (see list below). However I'm failing at PP3V3_S4SW_SNS which is just showing 0,2 V (No short in diode-mode unplugged). According to schematics for 820-00165-A PP3V3_S4SW_SNS comes from U8050, however i´m missing the enable SMC_SENSOR_PWR_EN (no short in diode-mode unplugged).
Question(s):
1. As I'm following schematics for 820-00165-A what differences should i expect since i´m working on a 820-00165-02 board?
2. Finally the most obvious: Why no SMC_SENSOR_PWR_EN/PP3V3_S4SW_SNS.
Thankful for any help or tip.
I have the following rails:
PPBUS_G3H 8,6 V
PPBUS_S5_HS_COMPUTING_ISNS 8,6 V
PPBUS_S5_HS_OTHER_ISNS 8,6 V
PPDCIN_G3H_ISOL 15 V
PPDCIN_G3H 15 V
PP3V42_G3H 3,42 V
PPVRTC_G3H 3,33 V
PP5V_S5 5 V
PP5V_S4RS3 5 V
PP5V_S0 5 V
PP3V3_S5 3,3 V
PP3V3_S4 OK 3,3 V
PP3V3_SUS 3,3 V
PP3V3_S3 OK 3,3 V
PP3V3_S0 OK 3,3 V
PP3V3_S4SW_SNS 0,2 V
PP3V3_S0SW_SSD 3,3 V
PP3V3_S4_TBTAPWR 3,3 V
PP1V8_S3 1,8 V
PP1V2_S3 1,2 V
PP1V05_SUS 1,05 V
PP1V5_S0 1,5 V
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