Warning: mysqli::__construct(): (HY000/1203): User howardkn already has more than 'max_user_connections' active connections in D:\Inetpub\vhosts\howardknight.net\al.howardknight.net\includes\artfuncs.php on line 21
Failed to connect to MySQL: (1203) User howardkn already has more than 'max_user_connections' active connectionsPath: ...!s1-3.netnews.com!feeder.usenetexpress.com!tr2.iad1.usenetexpress.com!news-out.netnews.com!postmaster.netnews.com!eu1.netnews.com!not-for-mail X-Trace: DXC=7F X-Complaints-To: support@frugalusenet.com Date: Sun, 26 Jan 2025 02:45:10 -0500 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: Intermittent fault on Korg SDD 3300 Newsgroups: sci.electronics.repair References: <67951f89$1$3620713$882e4bbb@reader.netnews.com> Content-Language: en-US From: bitrex In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Antivirus: AVG (VPS 250125-4, 1/25/2025), Outbound message X-Antivirus-Status: Clean Lines: 44 Message-ID: <6795e805$0$13$882e4bbb@reader.netnews.com> NNTP-Posting-Host: 127.0.0.1 X-Trace: 1737877509 reader.netnews.com 13 127.0.0.1:48455 Bytes: 3140 On 1/25/2025 3:13 PM, ehsjr wrote: > On 1/25/2025 12:29 PM, bitrex wrote: >> I have a Korg SDD 3300 triple digital delay rack unit that was a bit >> of a basket case when I got it. Someone had tried to "fix" it at some >> point and it had a number of issues including the wrong voltage >> regulator slapped in the negative rail, miswired output jacks, dead EL >> backlight, bad SRAM 2032... >> >> Fixed that up and I was able to get a copy of the service manual and >> use the three-finger-salute button combo to get its mind back after >> SRAM battery replacement as is common on units of this vintage, >> followed the adjustment procedure in the service manual and everything >> seems to work as it should now except one really irritating >> intermittent fault remains: the LCD will occasionally garble up at >> power-on or in use as so: >> >> >> >> It's annoyingly unpredictable and seems somewhat related to how it's >> mounted? I can power it up 25 times on the bench and it works fine >> making me think I solved the problem, then slide it back in the rack >> and it starts acting up again. > > When the failure is position sensitive, look for a bad switch or cable > that causes a line to float between a logic 0 and 1. > > War story: I had a bad ice maker in the freezer that failed only when it > was installed. Worked 100% on the bench and not possible to troubleshoot > when installed. Turned out to be a bad micro switch that failed (high > resistance instead of ~0 ohms when closed) only when I held the thing at > an angle. > > Your problem looks like a tough one if it's a switch or cable. :-( > > Ed Thanks for your suggestions, I feel like there was some substance use going on when this unit was designed and servicing it makes me feel the same way so at least there is symmetry.. -- This email has been checked for viruses by AVG antivirus software. www.avg.com