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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Tascam DR-07 SD card audio recorder
A bag of bits to deal with , someone thought epoxying a SM switch back onto
the pcb was enough and then could not reassemble the Chinese block puzzle. I managed to work out how to get the meshes back into the mic housings and the 2-mic cross- yoke assembly back into the main body, despite never seeing the original disassembly sequence. As the usual incompetent "designer" , no point in replacing as "designed". This sw is only soldered at the usual SM 3 miniscule pads to the pcb with no extra moulding around it to resist any excessive finger pressure. So come flat battery and nothing at switch on , the usual owner thought process is press the button harder. Oddly there is quite a bit of space to play with and a larger switch can go in there , mechanically decoupled from the pcb via 3 wires of course, but I'm wondering what sort of fixing. 2 screws through the body to properly anchor some mount behind a bigger more conventional stemmed click switch ? |
#2
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Tascam DR-07 SD card audio recorder
I forgot the important point, these switches are soldered side-on to the
board not large face to the board , so a turning moment of half-width times finger pressure to break the solder |
#3
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Tascam DR-07 SD card audio recorder
Orange silicon dimple cut from inside a scrapped R/C zapper , with the
conductive pad cut away, seated in the casing hole and larger thru-pcb click switch mounted inside it, fixed to the case , not the pcb. Wired to the pcb pads, Looks better than the original , and beneficially now more recessed and hopefully will last longer than the original |
#4
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Tascam DR-07 SD card audio recorder
A bit disconcerting on first powering up, not seeing how these operate
normally. Needs 3 second hold down on the momentary sw or just a brief line on the LCD and brief flash of the backlight and peak LED. There will be thousands of these abandoned by owners , for anyone who finds one and is prepared to get inside and do a fairly simple repair, |
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