x68000:soft_power_switch_troubleshooting_and_repair
Differences
This shows you the differences between two versions of the page.
Both sides previous revisionPrevious revisionNext revision | Previous revisionNext revisionBoth sides next revision | ||
x68000:soft_power_switch_troubleshooting_and_repair [2012/11/21 00:10] – eidis | x68000:soft_power_switch_troubleshooting_and_repair [2012/11/21 00:17] – eidis | ||
---|---|---|---|
Line 1: | Line 1: | ||
===== Soft-power troubleshooting and repair ===== | ===== Soft-power troubleshooting and repair ===== | ||
- | The following information is kind contribution by our forum members **Lydux** and **Caius** and this fix was applied to X68000 | + | The following information is kind contribution by our forum members **Lydux** and **Caius** and this fix was applied to X68000 SUPER and Expert HD. |
**The symptoms:** X68000 powers on fine, but does not shut down when the soft-power button is pressed. The screen fades, Power LED does not change from Green to Red and the PSU fan keeps spinning. The same happens with a regular ATX PSU. | **The symptoms:** X68000 powers on fine, but does not shut down when the soft-power button is pressed. The screen fades, Power LED does not change from Green to Red and the PSU fan keeps spinning. The same happens with a regular ATX PSU. | ||
Line 15: | Line 15: | ||
*From the expansion bus (/EXPWON) | *From the expansion bus (/EXPWON) | ||
*Via the front power switch (/PSON) | *Via the front power switch (/PSON) | ||
- | *A soft-sequence signal from the system controller (/MPWOFF) | + | *Via the soft-sequence signal from the system controller (/MPWOFF) |
- | In normal operation, all these 4 signals must go logic High (+5v) to get a system shutdown. | + | In normal operation, all these 4 signals must go to logic High (+5v) to get a system shutdown. |
The problem might be due to a signal that is always stuck Low. | The problem might be due to a signal that is always stuck Low. | ||
- | If you look to the Buffered IO part in the schematics, 3 of these signals are connected to the MFP GPIP port. They can be queried via software and are connected like this : | + | If you look at the Buffered IO part in the schematics, 3 of these signals are connected to the MFP GPIP port. They can be queried via software and are connected like this : |
|/ | |/ | ||
Line 35: | Line 35: | ||
*PSON = 0 | *PSON = 0 | ||
- | **If RTC_ALARM always | + | **If RTC_ALARM always |
*Bad RTC chip (RP5C15) | *Bad RTC chip (RP5C15) | ||
x68000/soft_power_switch_troubleshooting_and_repair.txt · Last modified: 2019/08/27 20:45 by 127.0.0.1