Repair Actions/0001: Difference between revisions
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{{See also|Errors|Secondary Error Codes}} | {{See also|Errors|Secondary Error Codes}} | ||
{{ | {{RepairNote}} | ||
;ERROR_V_12P0 | ;ERROR_V_12P0 | ||
ANA_V12P0_PWRGD is driven high by the [[ANA]] (later [[HANA]] and eventually [[KSB]]) as long as the V_12P0 rail is within tolerance. If V_12P0 ever drops out of tolerance, the signal is de-asserted, causing the [[SMC]] to enter [[Errors#EC_FATAL|EC_FATAL]] and on Original Xbox 360's, the 0001 code to be displayed on the front panel. Xbox 360 S/E consoles do not display this error, and simply shut back down. | |||
ANA_V12P0_PWRGD is driven high by the [[ANA]] (later [[HANA]] and eventually [[KSB]]) as long as the V_12P0 rail is within tolerance. If V_12P0 ever drops out of tolerance, the signal is de-asserted, causing the [[SMC]] to enter [[Errors#EC_FATAL|EC_FATAL]] and the 0001 code to be displayed on the front panel. | |||
== Short Circuit == | == Short Circuit == | ||
* Check if V_12P0 is shorted | * Check if V_12P0 is shorted | ||
* If it is, check circuit sections to localize short | * If it is, check circuit sections input side to localize short | ||
** Lift at least 1 pin of the inductors to isolate sections before checking | |||
** CPU VREG | ** CPU VREG | ||
** GPU VREG (Not on Xbox 360 S/E motherboards) | ** GPU VREG (Not on Xbox 360 S/E motherboards) | ||
** V_5P0 VREG | ** V_5P0 VREG | ||
*** Also responsible for V_1P8 on the Original Xbox 360 motherboards, V_3P3 on Xbox 360 S | *** Also responsible for V_1P8 on the Original Xbox 360 motherboards, V_3P3 on Xbox 360 S/E motherboards | ||
** V_12P0 Bleeder | ** V_12P0 Bleeder | ||
== PSU Enable and Power Good == | == PSU Enable and Power Good == | ||
* Everything in this section must be checked quickly, as the SMC will shut down power upon entering EC_FATAL | |||
* Check PSU_V12P0_EN signal components | * Check PSU_V12P0_EN signal components | ||
** If components are fine but the signal is missing, replace Southbridge | ** If components are fine but the signal is missing, replace Southbridge | ||
* Check 12V on DC jack | * Check 12V on DC jack | ||
** If missing, | ** If missing, check DC jack | ||
* Check ANA_V12P0_PWRGD (V12P0_PWRGD on Corona and Winchester) | * Check ANA_V12P0_PWRGD (V12P0_PWRGD on Corona and Winchester) | ||
** If present, replace Southbridge | |||
** If missing, check V_12P0_DET circuit | ** If missing, check V_12P0_DET circuit | ||
** If V_12P0_DET is fine, but the signal is missing, replace ANA/HANA/KSB | ** If V_12P0_DET is fine, but the signal is missing, replace ANA/HANA/KSB | ||
{{Debug and Repair}} | {{Debug and Repair}} | ||
Latest revision as of 02:06, 31 March 2024
| Note This page is a technician's reference. You will need Schematic and/or Boardview files to follow these steps. |
- ERROR_V_12P0
ANA_V12P0_PWRGD is driven high by the ANA (later HANA and eventually KSB) as long as the V_12P0 rail is within tolerance. If V_12P0 ever drops out of tolerance, the signal is de-asserted, causing the SMC to enter EC_FATAL and on Original Xbox 360's, the 0001 code to be displayed on the front panel. Xbox 360 S/E consoles do not display this error, and simply shut back down.
Short Circuit
- Check if V_12P0 is shorted
- If it is, check circuit sections input side to localize short
- Lift at least 1 pin of the inductors to isolate sections before checking
- CPU VREG
- GPU VREG (Not on Xbox 360 S/E motherboards)
- V_5P0 VREG
- Also responsible for V_1P8 on the Original Xbox 360 motherboards, V_3P3 on Xbox 360 S/E motherboards
- V_12P0 Bleeder
PSU Enable and Power Good
- Everything in this section must be checked quickly, as the SMC will shut down power upon entering EC_FATAL
- Check PSU_V12P0_EN signal components
- If components are fine but the signal is missing, replace Southbridge
- Check 12V on DC jack
- If missing, check DC jack
- Check ANA_V12P0_PWRGD (V12P0_PWRGD on Corona and Winchester)
- If present, replace Southbridge
- If missing, check V_12P0_DET circuit
- If V_12P0_DET is fine, but the signal is missing, replace ANA/HANA/KSB