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Post ApBH4tVzkMsPslZCQi by [email protected] |
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More posts by [email protected] |
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Post #ApB3sj3NWBU6Yc35I8 by [email protected] |
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So apparently in 1993, Avon (the MLM (not that MLM (or that kind either))) comm… |
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Post #ApB49BDwY60AYkpvN2 by [email protected] |
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@foone @gewt "Answer your telephoam" |
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Post #ApB4PP8Ob7JOKryhOK by [email protected] |
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I opened it up (it's glued together! AHH!) and it turns out it's a Recy… |
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Post #ApB4XKNy8aVpvM2ZKi by [email protected] |
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Inside the plastic, we've got a single-sided PCB with a single IC and a bun… |
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Post #ApB4doXmvFEDCDj5Rw by [email protected] |
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The IC is an HM9102D. That's a Hualon Microelectronics TONE/PULSE SWITCHABL… |
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Post #ApB59ONBlE9vILpGlc by [email protected] |
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So the way this thing is broken is odd: You plug it in, and you can turn it on … |
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Post #ApB5Q0RjyLoA0jsRrU by [email protected] |
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This thing was definitely hand-soldered. With one possible exception they look … |
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Post #ApB5WeWbsGVS39K9eS by [email protected] |
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@foone Can you rebuild it? 🫣 |
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Post #ApB5WedhRuB4P8dohc by [email protected] |
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@eaterofsnacks I'm hoping so! |
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Post #ApB5eYlRB1W4V21unA by [email protected] |
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Nope, there's no bridge here. I checked. |
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Post #ApB5qljqlR2iDK6puq by [email protected] |
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Annoyingly there's two version of the datasheets: a 1-pager that just gives… |
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Post #ApB5tt3i0IbZmnsvAG by [email protected] |
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no really. it only included the punctuation. |
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Post #ApB663csXake2E8efI by [email protected] |
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@foone dafuq. |
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Post #ApB6MF2Psa903sniDo by [email protected] |
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Testing in circuit, I'm seeing 2.1v across VSS/VDD on that chip. The nomina… |
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Post #ApB6POguRhOsrwFIuW by [email protected] |
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@foone "significant white space and punctuation" kind of language 😂 |
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Post #ApB6bIhoWcd9mSLRmS by [email protected] |
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hmm. no, if this translated electrical characteristics table is at all correct,… |
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Post #ApB6elPqEp0Hgyad7I by [email protected] |
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@foone That sounds a lot like running a Chinese data sheet through a Western OC… |
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Post #ApB6yFlDdnsNJ5sl9M by [email protected] |
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@foone that one trace on the far left side about half way up looks pretty close… |
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Post #ApB6yFsfC7pZgBMhkm by [email protected] |
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@skotchygut yeah, that's the one I specifically tested! but no, it's fi… |
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Post #ApB6yYij9IAk6rrXP6 by [email protected] |
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this thing has a bunch of little caps and diodes and transistors. I've visu… |
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Post #ApB7ZYXiluQIH2M8jg by [email protected] |
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I'm getting the expected -51V on the input, so there's no problem with … |
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Post #ApB7cuME7cooncZthI by [email protected] |
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and the fuse is fine, I did test that. |
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Post #ApB8AYPCFIeuYu0iw4 by [email protected] |
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Here's the translated(ish) schematic from the HM9102D datasheet. |
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Post #ApB8Dw5GfLUoruIm1o by [email protected] |
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I'm gonna assume this device is basically this design with with minimal cha… |
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Post #ApB8fEeBkwmoGBeYMq by [email protected] |
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I'm suspicious of this goop. It looks like they hotglued the caps down, so.… |
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Post #ApB8os3gayuP69AqUi by [email protected] |
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@foone "im suspicious of this goop" is definitely a sentence |
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Post #ApB93WDg4eQ1i4pe88 by [email protected] |
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C2 & c9 are 47µF 16v caps C6 & C8 are 100µF 16v capsC7 is 1µF 50v cap |
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Post #ApB993TTrPreIPrbsm by [email protected] |
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@xyhhx FOONE B TURING: GOOP INSPECTOR |
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Post #ApB9FlHTtzRhtfRtw0 by [email protected] |
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@foone diagnosis: wrong goop |
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Post #ApB9FlPHQzgUHr685g by [email protected] |
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@cinebox it's like I'm a doctor for a slimegirl, not an electronics rep… |
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Post #ApBAHBtiWkMAgtZxQm by [email protected] |
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@foone mmm, 30 year old baked electrolyte |
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Post #ApBAQlLY69yBEwA3do by [email protected] |
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Desoldered them all. Let's test.My cap meter is saying C7 is 1116nF, or 1.1… |
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Post #ApBAbWpkOhRfPkQ5oW by [email protected] |
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my MTester thing says it's got an ESR of 7 ohms, which is high, but I don&#… |
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Post #ApBAldHNHtVEIi9zmq by [email protected] |
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The two 100µF caps:c6: 144 µF, ESR 0.5 ohm. c8: 148 µF, ESR 0.6 ohm. that… |
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Post #ApBAsDpsHhWfPrRJCq by [email protected] |
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the 47 µF caps:c2: 60 µF, 1.3 ohm ESRc9: 62 µF, 1.2 ohm ESR |
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Post #ApBB5vdsiwzJ2oMjWS by [email protected] |
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@foone Internal resistance doesn't increase *that* fast with capacitance, a… |
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Post #ApBB8gsg3xQc8DbSpE by [email protected] |
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The fact that the wording here makes it sound like there's a spectrum of ho… |
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Post #ApBB8h07cHNoVJ5PQe by [email protected] |
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@julie I'm also on the analog* spectrum, so I know all about this! * or if … |
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Post #ApBBBZjf5NZiq5lI7k by [email protected] |
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so none of these caps are good, but none are super smoking-gun either. Still, I… |
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Post #ApBBFz9IXbIGoer7U8 by [email protected] |
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@timonsku nah, I'm using an MTester that guesses at it and a capacitor mete… |
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Post #ApBBUcvtQG5YG1ZEeW by [email protected] |
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@foone I think you might be able to test if the diodes/transistors failed short… |
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Post #ApBBvTXKSukmvzsd1c by [email protected] |
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replacements will be here tomorrow! |
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Post #ApBByn1uRk1SGClReS by [email protected] |
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I don't currently have a good way to test the oscillator, but I suspect it&… |
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Post #ApBCE6SIVM0eqrPQ2K by [email protected] |
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There are some ceramic caps on here too, but I didn't desolder or test any … |
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Post #ApBCKwroYKM18mbmfw by [email protected] |
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@foone sounds like somebody's getting a (working) christmas present! |
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Post #ApBCTkmiqKhkH6QQXg by [email protected] |
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I also don't know if this thing ever worked: this one came from ebay appare… |
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Post #ApBCeEcalYothugVzk by [email protected] |
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@foone ceramics almost always hold up, I wouldn’t bother.That brown goop look… |
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Post #ApBCglqWD0FLKZPM00 by [email protected] |
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It's entirely possible it never worked, and they soldered it together wrong |
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Post #ApBClqJR1vwydBLsfI by [email protected] |
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@moira fortunately there's no traces there (since it's single sided) so… |
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Post #ApBCtGPMPE0valf6lU by [email protected] |
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@foone There's a thing, though… Multiple whitespaces in HTML are usually … |
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Post #ApBCtGW60BOxveoUGO by [email protected] |
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@ArthurBarbaro it's a pdf doing font weirdness, not html |
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Post #ApBD1FXHX5TFCgAvKq by [email protected] |
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@diedofheartbreak nah, it's got no way to hang it up, so they made it a on/… |
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Post #ApBD992NZrtvMjUACG by [email protected] |
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So the current plan is:1. Stick new caps on2. Test3. If not work, start yanking… |
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Post #ApBDI91czYqzvzQRUm by [email protected] |
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@foone who been eatin chocolatr |
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Post #ApBDoc1ugmAh9o2aum by [email protected] |
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@lritter not me! I'm diabetic. some 1992 punk probably was, though |
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Post #ApBE2knisIv0Pl993Q by [email protected] |
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@foone I feel like there was a missed opportunity to make it completely yellow … |
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Post #ApBED6cwa3lH0F2bNw by [email protected] |
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@huronbikes they sold this in a lot of varieties (the phone part is the same, t… |
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Post #ApBEeY5SaqHBzGStUW by [email protected] |
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@foone @gewt nothing to do with it, sorry; i just had to. the clip sat on my hd… |
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Post #ApBFuAWo3JMBVYGgBk by [email protected] |
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@foone yea MLCCs don't really die. You can regenerate them by heating them … |
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Post #ApBGZoj9UvPa3Xtzu4 by [email protected] |
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@timonsku yeah. I'm not gonna worry about them unless I can rule out everyt… |
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Post #ApBH4tVzkMsPslZCQi by [email protected] |
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@foone I can smell this pcb from here |
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Post #ApBH7wAwJPKp0CAYLo by [email protected] |
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@mattsains I can't and it's on my desk! I'm anosmic :) |
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Post #ApBKzvZX4SqedB6muG by [email protected] |
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@foone This particular style of PCB routing seems to be common among really che… |
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Post #ApBL0LRyrAFwtHm7kG by [email protected] |
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If analog media like vinyl is considered more rich and less lossy, you can just… |
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Post #ApBL0LZ4QnvZFH5mnQ by [email protected] |
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@julie that is why I transitioned, yeah, for the warmer sound |
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Post #ApBL3NcRFYKOUA789A by [email protected] |
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@karotte this one might be old enough that they routed it by hand with stencils. |
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Post #ApBQpu7AEcOUwJRX3g by [email protected] |
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@foone These kinds of boards were usually done using wave soldering. |
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Post #ApBbslTdu6xSW1WXey by [email protected] |
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@foone that black goo is just material they use to hold the caps together. The… |
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Post #ApBdNe7nOENadyauem by [email protected] |
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@foone I'd say they were originally glued with this brown crap, then pulled… |
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Post #ApBeKivNBjvucBxDLU by [email protected] |
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@foone @gewt I had one of these back in like 1998 that I had as a spare because… |
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Post #ApBh0I7hQO4nYzfVCK by [email protected] |
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@foone @karotte but you do find that even on (really bad) USB3 "hubs"… |
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Post #ApBs2LC254Pt9wsJZg by [email protected] |
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@plaes I figured this one wasn't because of all the flux residue and incons… |
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Post #ApByVICEtuMfzL9zgu by [email protected] |
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@foone isn't that the original goes-conductive glue before someone added ho… |
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Post #ApC1mtfn7HMx0P4KlU by [email protected] |
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@foone ...or someone has tried to fiddle with it... |
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Post #ApC8qJnd8PrwaDJXBQ by [email protected] |
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@plaes maybe! But it was in a closed box, I don't think it's been opene… |
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Post #ApC8u80CwE9n9Z0uYK by [email protected] |
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@foone I can relate -- that's generally as much as I can translate, too |
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Post #ApCDSZrWGIWzDndFHk by [email protected] |
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@foone @gewt My sister had this when we were kids! The foam phone! The switch f… |
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Post #ApDi2vxEnBqTwnWDmS by [email protected] |
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got the new caps in. time to solder. |
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Post #ApDirPoy1V1N3XioRU by [email protected] |
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Damn. No difference. |
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Post #ApDitySSDOUJ3lPZvU by [email protected] |
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it is definitely trying to pulse-dial, even if I can't hear it I can see th… |
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Post #ApDjCrTKPdyUtZpJMe by [email protected] |
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lemme try blind-dialing my own phone number. maybe this thing just has a bad sp… |
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Post #ApDjGiW5ePC4HLxOLo by [email protected] |
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@foone No. Denied. :) |
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Post #ApDkhOZ22eMWAbcNFY by [email protected] |
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YO! it works. it took a lot of tries to get the fucker to dial, but I was able … |
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Post #ApDl1sSYbHnKgIM8Tg by [email protected] |
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reconnected the speaker, but got nothing. So it's still one-way |
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Post #ApDl4QGzqyQc8CA8OW by [email protected] |
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lemme locate a spare speaker |
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Post #ApDlLRpBL3dTrjGpeK by [email protected] |
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@foone this is interestingly also timely commentary on the state of the House o… |
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Post #ApDlenv1PvKHtLERM0 by [email protected] |
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it turns out I have no spare speakers.how strange that a noted misophonic would… |
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Post #ApDm8sdSReQXCwMFP6 by [email protected] |
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okay I plugged it into the speaker of a broken flip-clock I just so happened to… |
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Post #ApDmCTym3eyrtd2v5c by [email protected] |
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so I think this thing might have just had a bad speaker from the beginning. who… |
