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Strange Ferguson SRB1 Display. Is it an Error Code?
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<blockquote data-quote="philpem" data-source="post: 1150340" data-attributes="member: 415269"><p>There are a couple of possible causes of the issue. There are a couple of DRAMs attached to the MAC chipset which can fail and cause a huge mess which the firmware won't be able to figure out. I think they're usually 4164s, two of them. If they're "MT" branded I'd replace them as a first step.</p><p></p><p>After that I'd check the 20.25MHz clock (which supplies the MAC section and ACM), then check voltages and other clocks, and go through the diagnostic steps for "receiver LEDs light up but does not come out of standby".</p><p></p><p>Unfortunately the system selftest status is only shown on one of the ACM diagnostic screens, which is a bit pointless because just about the whole receiver needs to be working (at least as far as output video sync and ACM comms) before it can tell you what's gone wrong ...!</p></blockquote><p></p>
[QUOTE="philpem, post: 1150340, member: 415269"] There are a couple of possible causes of the issue. There are a couple of DRAMs attached to the MAC chipset which can fail and cause a huge mess which the firmware won't be able to figure out. I think they're usually 4164s, two of them. If they're "MT" branded I'd replace them as a first step. After that I'd check the 20.25MHz clock (which supplies the MAC section and ACM), then check voltages and other clocks, and go through the diagnostic steps for "receiver LEDs light up but does not come out of standby". Unfortunately the system selftest status is only shown on one of the ACM diagnostic screens, which is a bit pointless because just about the whole receiver needs to be working (at least as far as output video sync and ACM comms) before it can tell you what's gone wrong ...! [/QUOTE]
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Strange Ferguson SRB1 Display. Is it an Error Code?
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