Panasonic DMR-E80H consumer electronics pr0n - Page 1
Forum section: electronics / general

author: FrankenPC
author_rank: Unknown
timestamp: May 12, 2014, 02:45:16 am
content: Time to clear out some ancient electronics from my entertainment center. I decided to pop open this old DVD video recorder to see what was going on inside. Some interesting engineering.Vintage 2003. What's interesting about this is, it has component video out: 480P/480i. The video processor does progressive scan interpolation.Interesting ceramics. These are some of the thinnest BGA's I've ever seen.For scale comparison. The large Panasonic ASIC with the Dolby symbol is: MN6775511The 3/4" ceramic has a Dolby symbol: 85572. The 1/2" ceramic:103E0500. I wish I could get better contrast and dynamic range out of my cruddy camera phone.The bottom. The panasonic ASIC: MN85620GL. the 1/2" ceramic: MN673744.Anyway...there's other interesting features. If you're interested in seeing them, I'll post the pics.

author: urbis
author_rank: Unknown
timestamp: May 14, 2014, 07:52:58 am
content: Keep posting the images, interesting teardown.I believe these had issues with an IC in the power supply which caused them to "die".

author: amyk
author_rank: Super Contributor
timestamp: May 14, 2014, 11:42:16 am
content: I actually managed to find some datasheets:MN85572 MPEG-2 encoder:http://www.icwic.com/icwic/data/pdf/cd/cd067/Video%20Codec,%20Encoder,%20Serializer/d/68719.pdfhttp://www.semicon.panasonic.co.jp/ds4/MN85572_AJM_discon.pdf(Japanese)MN103E series embedded processor:http://pentax-hack.info/firmware/pan/13250-040e.pdfMN85620GL "stream transfer control LSI":http://www.ic72.com/pdf_file/m/68720.pdfMN6775511:http://datasheet.eeworld.com.cn/pdf/PANASONIC/37239_MN6775511.pdfMN673744 "Video Digital Conversion LSI":http://www.icwic.com/icwic/data/pdf/cd/cd067/Video%20Sync,%20Deflection/d/68721.pdfhttp://www.semicon.panasonic.co.jp/ds4/SDF00036AEM_discon.pdfAlso this:http://m.eet.com/media/1049009/UTH_1.gifI wonder if the use of a ceramic package is due to being high-speed ECL logic.These days it could all be done in one or two SoCs...

author: FrankenPC
author_rank: Unknown
timestamp: May 15, 2014, 04:59:27 am
content: OK. These are the other shots.The entire unit is modular. By that I mean the modules are all connected with knife blade style connector assembly. Even the entire front control panel just literally popped off. I've only ever seen ribbon/wire loom style connectors before on consumer electronics.Close up of a female blade connectorClose up of a male blade connectorSo, this is why the HDD was so quiet. They wrapped the entire drive in a dense foam material.The ATA/133 HDD.Interesting coil form on the switching PSUI found this to be kind of interesting. It's the connector between the main board and the PS board. It's springy wire formed into a ribbon and trapped by plastic rails.Pic of mainboard TOPSIDE.That's a crazy layout. Conformal coating on the whole thingOne of the coated chips. Not bad camera lighting. I'll need to scrape it off to see it.Another coated chip.Last shot. Underside of DVD burner.

author: amyk
author_rank: Super Contributor
timestamp: May 15, 2014, 12:57:13 pm
content: Those springy ribbon and blade connectors aren't that rare - I know Sony used them on their VCRs. They make for much faster automated assembly (and disassembly) than FFCs or regular looms.

author: macboy
author_rank: Super Contributor
timestamp: May 15, 2014, 01:47:02 pm
content: I like to make nightlights out of the VFDs from these things. I use a 16 VAC wall-wart transformer. A series capacitor* provides current limiting for the filament (shoot for ~70 mA AC or so), and a half wave rectifier provides DC for the grid and anodes (all connected together). I have an old Pioneer AV receiver with a big (25x10 cm?) VFD that I am looking forward to doing this to.(* typically two electrolytics, back-to-back, +leads together, about 10 uF or so to start, adjust from there).

author: FrankenPC
author_rank: Unknown
timestamp: May 15, 2014, 02:39:29 pm
content: Quote from: macboy on May 15, 2014, 01:47:02 pmThat's a good idea. It's a shame that I've thrown away some incredible examples of VFD panels in the past.

author: SeanB
author_rank: Super Contributor
timestamp: May 15, 2014, 07:15:31 pm
content: I got a pair of VFD displays from Kolbep that I will do that to someday.

author: Stonent
author_rank: Super Contributor
timestamp: May 16, 2014, 12:21:50 am
content: I have a variant of this one that does not have the HD inside (DMR-ES15, I think). It died after a few years with very little use. I don't recall exactly what the issue was but some kind of error on startup that was non specific from the googling I did.I liked the feature where you could load a DVD-RAM disc in it and start recording a TV show, but also have full fast forward, reverse, rewind and pause without interrupting the recording. The DVD-RAM disc was all the storage it needed for that.

author: dannyf
author_rank: Super Contributor
timestamp: May 16, 2014, 12:55:21 am
content: Some serious engineering went into it.