Repair Actions/0033: Difference between revisions
Jump to navigation
Jump to search
No edit summary |
No edit summary |
||
| Line 23: | Line 23: | ||
== VREG Circuit == | == VREG Circuit == | ||
* Everything in this section must be checked quickly, as the SMC will shut down power upon entering EC_FATAL | * Everything in this section must be checked quickly, as the SMC will shut down power upon entering EC_FATAL | ||
* Check if V_MEM | * Check if V_MEM is present | ||
* If it is, replace the PWM driver and recheck PWRGD | * If it is, replace the PWM driver and recheck PWRGD | ||
* If it isn't, check VREG and PWM driver | * If it isn't, check VREG and PWM driver | ||
{{Debug and Repair}} | {{Debug and Repair}} | ||
Revision as of 15:27, 21 June 2023
| 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 is present
- If it is, replace the PWM driver and recheck PWRGD
- If it isn't, check VREG and PWM driver