preface:why_x68000_s_caps_are_almost_broken
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preface:why_x68000_s_caps_are_almost_broken [2014/09/16 20:26] – [EXPERT,SUPER,XVI,030 (SH4 Unit)] eidis | preface:why_x68000_s_caps_are_almost_broken [2014/09/17 06:08] – [Compact XVI,030 Compact] eidis | ||
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====== ACE (SH2 Unit) ====== | ====== ACE (SH2 Unit) ====== | ||
+ | |||
+ | It has the same design as the PSU of Expert but features lower rated capacitors. It is recommended to use use the capacitor ratings which are mentioned in the Expert section. | ||
====== EXPERT, | ====== EXPERT, | ||
- | All info taken from: http:// | + | Almost all info taken from: http:// |
All X68000 power supplies fail because of the capacitors. Here are a few common symptoms and solutions: | All X68000 power supplies fail because of the capacitors. Here are a few common symptoms and solutions: | ||
- | - Main power is connected, front LED is glowing red but the system does not react to front soft-power switch. Check if ZD31 or anything around it is burnt. Replace ZD31 and all electrolytic capacitors. There are some cases where Q32 also needs to be replaced. In some rare cases PC31, PC51, PC52 also need to be replaced. | + | - Main power is connected, front LED is glowing red but the system does not react to front soft-power switch. Check if ZD31 or anything around it is burnt. Replace ZD31 and all electrolytic capacitors. There are some cases when Q32 also needs to be replaced. In some rare cases PC31, PC51, PC52 also need to be replaced. |
-R35 rupture is caused when C31 capacity has decreased to the point that it is no longer able to supply constant voltage and current. In this case it is advisable to replace Q31, Q32, R35, ZD31. | -R35 rupture is caused when C31 capacity has decreased to the point that it is no longer able to supply constant voltage and current. In this case it is advisable to replace Q31, Q32, R35, ZD31. | ||
- | -The fuse gets blown if C9 is faulty. Replace all electrolytic capacitors | + | -The fuse gets blown if C9 is faulty. Replace all electrolytic capacitors, 4A fuse and check if there are no signs of damage to the ZD31 or near it. |
-Most parts though discontinued have generic replacements available. The only custom-made part is the transformer but it is very reliable and does not break easily. | -Most parts though discontinued have generic replacements available. The only custom-made part is the transformer but it is very reliable and does not break easily. | ||
+ | |||
+ | **Schematics** | ||
+ | *[[http:// | ||
^Part number | ^Part number | ||
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====== PRO ====== | ====== PRO ====== | ||
+ | |||
+ | **Schematics** | ||
+ | *[[http:// | ||
====== Compact XVI,030 Compact ====== | ====== Compact XVI,030 Compact ====== | ||
+ | These are more tolerant. The capacitors usually leak but do not kill anything and a simple recap is all that is needed. |
preface/why_x68000_s_caps_are_almost_broken.txt · Last modified: 2019/08/27 20:45 by 127.0.0.1