Repair Actions/0002: Difference between revisions
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(Created page with "{{See also|Errors|Secondary Error Codes}} {{Note|This page is a technician's reference and is not intended to teach diagnosis and repair of electronic circuits.}} ;ERROR_V_CPUCORE VREG_CPU_PWRGD is driven high by the V_CPUCORE controller as long as the rail is within tolerance. If V_CPUCORE ever drops out of tolerance, the signal is de-asserted, causing the SMC to enter EC_FATAL and the 0002 code to be displayed on the front panel. == Short Cir...") |
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== 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_CPUCORE is in | * Check if V_CPUCORE is in within tolerance | ||
* If it is, replace the PWM driver and recheck PWRGD | |||
* If it isn't, check each phase of V_CPUCORE VREG and PWM driver | * If it isn't, check each phase of V_CPUCORE VREG and PWM driver | ||
** 3 phases on Xenon, Zephyr, and Elpis | ** 3 phases on Xenon, Zephyr, and Elpis | ||
** 2 phases on every other board | ** 2 phases on every other board | ||
Revision as of 12:49, 20 January 2023
| Note This page is a technician's reference and is not intended to teach diagnosis and repair of electronic circuits. |
- ERROR_V_CPUCORE
VREG_CPU_PWRGD is driven high by the V_CPUCORE controller as long as the rail is within tolerance. If V_CPUCORE ever drops out of tolerance, the signal is de-asserted, causing the SMC to enter EC_FATAL and the 0002 code to be displayed on the front panel.
Short Circuit
- Check if V_CPUCORE is shorted
- If it is, check each phase to localize short
- 3 phases on Xenon, Zephyr, and Elpis
- 2 phases on every other board
- Check V_CPUCORE decoupling capacitors near and under CPU
- If all components are fine but the short remains, replace the CPU
VREG 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_CPU_EN signal components
- If components are fine but the signal is missing, replace Southbridge
- Check VREG_CPU_PWRGD (VREG_CPUCORE_VCS_PWRGD on Xbox 360 S/E motherboards)
- If present, replace Southbridge
- If missing, check 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_CPUCORE is in within tolerance
- If it is, replace the PWM driver and recheck PWRGD
- If it isn't, check each phase of V_CPUCORE VREG and PWM driver
- 3 phases on Xenon, Zephyr, and Elpis
- 2 phases on every other board