EEVblog Electronics Community Forum
Electronics => Repair => Topic started by: mskobier on June 14, 2015, 03:10:15 pm
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All,
This is a duplicate post from the one I posted over in the test equipment section. Figured everyone did not vist every section, so I'm posting again here in repair.
I just pulled my Sencore LC101 down from the shelf to use today. I haven't needed to use it in a couple of years. Anyway, its dead!. I get a momentary display upon turning it on, then nothing. No display, no LEDs, nothing. I checked the fuse and it was good. Just a beginning guess, but its probably the power supply. Anyway, I need a schematic or better yet a service manual for it. Can anyone help me out, or no where I can find a copy of the schematic?
Thanks
Mitch
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Mine had a display that would flicker and go out - it was a fixed voltage regulator. Don't remember which one - but it had a tall tab on it. Freeze mist helped to identify. Had to use an NTE part - it was a fairly unusual package.
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Mzacharias,
Thanks for the reply. Unfortunately, my lc101 is completely dead with only a momentary flash of the display when turning on and off. At this point I don't have any idea where to start. Maybe this weekend, I'll open it up and do a little probing
Mitch
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Did you ever repair your sencore unit?
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Your lucky day?
http://elektrotanya.com/sencore_lc101.pdf/download.html (http://elektrotanya.com/sencore_lc101.pdf/download.html)
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Mzacharias,
Thanks for the reply. Unfortunately, my lc101 is completely dead with only a momentary flash of the display when turning on and off. At this point I don't have any idea where to start. Maybe this weekend, I'll open it up and do a little probing
Mitch
I'd check your supplies, I'm guessing one of the filter caps when out and you have too much ripple.
Common failures I use to see are: IC32, IC33 and TR8. All are located on the top board.