a1989 820-00850-a no power

[Harryrepair]

Hello all,

this board is drawing 0.00 - 0.13a (jumping) with 20.3V
I assume all cd3215 are ok.

U6940 has 3.3v on pins 1,3,4 but 0.00 v on pin 10 (chgr_rst_in_r)
By the way L7600 is showing 0.03v,pp5v_g3s is missing.

U7000 was already treated (picture below)

Thank you in advance!

[Harryrepair]

Re: a1989 820-00850-a no power

Hello all,

i measured all Power Rails. there is a lot of missing and PPBUS should be at 13.1V i think.
It looks like PP5v_G3S is not created, the Enable Signal is 0V as well.
The device can be put into DFU Mode but the repair aborts.

Any ideas?

PBUS_G3H 12.26 V

PPBUS_HS_CPU 12.27 V

PPVIN_G3H_P5VG3S 12.27 V

PPVIN_G3H_P3V3G3H 12.27 V

PPVIN_G3H_P3V3G3HRTC 12.27 V

PPBUS_G3H_SSD0 12.27 V

PPBUS_G3H_SPKRAMP_LEFT 12.27 V

PPBUS_G3H_SPKRAMP_RIGHT 12.27 V

PPDCIN_G3H 20.3 V



5V Rails

PP5V_G3S 0.009 V

PP5V_G3S_CPUREG 0.009 V

PP5V_G3S_TPAD 0V

PP5V_G3S_KBD 0V

PP5V_G3S_ALSCAM 0 V

PP5V_S4SW 0 V

PP5V_S4SW_ISNS 0 V

PP5V_S0SW_LCD_ISNS_R 0.07 V

PP5V_S0SW_LCD 0.4 V

PP5V_S5_LDO 0 V



3V3 Rails

PP3V3_G3H_RTC 3.39 V

PP3V3_G3H_SSD0 3.39 V

PP3V3_G3H_RTC_MESA 3.39 V

PP3V3_G3H 3.33 V, jumps all 5sec. for a mom to 2.3V

PP3V3_G3H_PMU_VDDMAIN same as above

PP3V3_G3H_DFR same as above

PP3V3_S4SW_SNS 0 V

PP3V3_G3S 0 V

PP3V3_S0_TBT_X_ISNS_R 0V

PP3V3_TBT_X_S0 0V

PP3V3_S0_TBT_T_ISNS_R 0V

PP3V3_TBT_T_S0 0V

PP3V3_G3S_WLANBT 0V

PP3V3_G3S_TPAD 0V

PP3V3_G3S_KBD 0V





CPU/PCH Rails

PPVCC_S0_CPU 0V

PPVCCSA_S0_CPU 0 V

PPVCCGT_S0_CPU 0V

PPVCCEDRAM_S0_CPU 0V

PPVCCIO_S0_CPU 0V

PP1V2_S0SW 0V



1V8 Rails

PP1V8_G3S 0V

PP1V8_G3S_WLANBT_VDDIO 0V



Memory Rails

PP1V2_S3 0V

PP1V2_S3_CPUDDR 0V

PP0V6_S0_DDRVTT 0V

PP0V6_S3_MEM_VREFDQ_A 0V

PP0V6_S3_MEM_VREFCA_A 0V

PP0V6_S3_MEM_VREFDQ_B 0V

PP0V6_S3_MEM_VREFCA_A 0V