Repair Actions/0003

From XenonLibrary
Revision as of 16:26, 21 June 2023 by Octal450 (talk | contribs)
Jump to navigation Jump to search
Note  This page is a technician's reference and is not intended to teach diagnosis and repair of electronic circuits.

This error has a different meaning on the Original Xbox 360 vs the Xbox 360 S and Xbox 360 E.

Original

ERROR_V_GPUCORE

VREG_GPU_PWRGD is driven high by the V_GPUCORE controller as long as the rail is within tolerance. If V_GPUCORE ever drops out of tolerance, the signal is de-asserted, causing the SMC to enter EC_FATAL and the 0003 code to be displayed on the front panel.

Short Circuit

  • Check if V_GPUCORE is shorted
  • If it is, check each phase to localize short
    • Lift at least 1 pin of the inductors to isolate sections before checking
    • 2 phases
  • Check V_GPUCORE decoupling capacitors near and under GPU
  • If all components are fine but the short remains, replace the GPU

Enable and Power Good

  • Everything in this section must be checked quickly, as the SMC will shut down power upon entering EC_FATAL
  • Check VREG_GPU_EN_N pullup and switcher
    • If components are fine but signal is missing, replace Southbridge
  • Check VREG_GPU_PWRGD
    • If present, replace Southbridge
    • If missing, check pullup
      • If pullup is fine, continue below

VREG Circuit

  • Everything in this section must be checked quickly, as the SMC will shut down power upon entering EC_FATAL
  • Check if V_GPUCORE is present
  • If it is, replace the PWM driver and recheck PWRGD
  • If it isn't, check each VREG phase and PWM driver
    • 2 phases

S and E

ERROR_V_3P3

VREG_V3P3_PWRGD is driven high by the V_3P3 controller as long as the rail is within tolerance. If V_3P3 ever drops out of tolerance, the signal is de-asserted, causing the SMC to enter EC_FATAL and the 0003 code to be displayed on the front panel.

Short Circuit

  • Check if V_3P3 is shorted
  • If it is, check circuit components to localize short
    • Lift at least 1 pin of the inductor to isolate the rail before checking

Enable and Power Good

  • Everything in this section must be checked quickly, as the SMC will shut down power upon entering EC_FATAL
  • Check VREG_V3P3_EN signal and pulldown
    • If pulldown is fine but signal is missing, replace Southbridge
  • Check VREG_V3P3_PWRGD
    • If present, replace Southbridge
    • If missing, check pullup
      • If pullup is fine, continue below

VREG Circuit

  • Everything in this section must be checked quickly, as the SMC will shut down power upon entering EC_FATAL
  • Check if V_3P3 is present
  • If it is, replace the PWM driver and recheck PWRGD
  • If it isn't, check VREG and PWM driver