Repair Actions/0001: Difference between revisions
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** 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, try another power supply | ||
* 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 present, replace Southbridge | ||
Revision as of 11:28, 20 January 2023
| Note This page is a technicians reference and is not intended to teach diagnosis and repair of electronic circuits. |
- 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 the 0001 code to be displayed on the front panel.
Short Circuit
- Check if V_12P0 is shorted
- If it is, check circuit sections to localize short
- 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 and Xbox 360 E motherboards
- V_12P0 Bleeder
PSU Enable and Power Good
- Check PSU_V12P0_EN signal components
- If components are fine but the signal is missing, replace Southbridge
- Check 12V on DC jack
- If missing, try another power supply
- 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