Repair Actions/0033

See also: Errors and Secondary Error Codes

Note  This page is a technician's reference and is not intended to teach diagnosis and repair of electronic circuits.

This error only exists on the Xbox 360 S and Xbox 360 E.

ERROR_V_MEM

VREG_VMEM_PWRGD is driven high by the V_MEM controller as long as the rail is within tolerance. If V_MEM ever drops out of tolerance, the signal is de-asserted, causing the SMC to enter EC_FATAL and the 0033 code to be displayed on the front panel.

Short Circuit

• Check if V_MEM 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_VMEM_EN signal and pulldown
  • If pulldown is fine but signal is missing, replace Southbridge
• Check VREG_VMEM_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_MEM voltage is within tolerance
• If it is, replace the PWM driver and recheck PWRGD
• If it isn't, check VREG and PWM driver