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HP 41C DOES NOT BEEP
08-30-2014, 07:00 PM
Post: #12
RE: HP 41C DOES NOT BEEP
(08-30-2014 06:44 PM)jebem Wrote:  
(08-30-2014 05:31 PM)aurelio Wrote:  I think maybe the "beep" missing could be due to a cold soldering, I added a magnified pic of the board and it seems the upper point could be one of those.

Hi Aurelio, good work!
After getting this far, if I were you I would use a new 15 watt low power pen soldering iron to unplug the two wires.
Then remove that solder mess on the PCB. Clearly it was not correctly soldered.
Now you need a audio oscillator (I use my multimeter that has a built in 2Khz signal) to test the buzzer and make sure it works.
Then resolder the wires using a low melting point good quality solder, using adequate heating to make a good solder joint (if the soldering iron requires more than 2 seconds to make an good melting it means you are using a underpowered tool).
Good luck with it.
Jose, I bought a couple of years ago the soldering iron you'll see just I'll find it out, and maybe it will be helpful that, but I'm sure that my brother, who has hand better than mine, 'll be helpful as well Smile
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Messages In This Thread
HP 41C DOES NOT BEEP - aurelio - 08-26-2014, 02:55 PM
RE: HP 41C DOES NOT BEEP - Jim Horn - 08-26-2014, 09:30 PM
RE: HP 41C DOES NOT BEEP - aurelio - 08-27-2014, 06:42 AM
RE: HP 41C DOES NOT BEEP - Les Bell - 08-27-2014, 03:52 AM
RE: HP 41C DOES NOT BEEP - aurelio - 08-27-2014, 06:53 AM
RE: HP 41C DOES NOT BEEP - aurelio - 08-30-2014, 03:25 PM
RE: HP 41C DOES NOT BEEP - Geoff Quickfall - 08-30-2014, 04:13 PM
RE: HP 41C DOES NOT BEEP - Mark Hardman - 08-30-2014, 04:46 PM
RE: HP 41C DOES NOT BEEP - aurelio - 08-30-2014, 05:31 PM
RE: HP 41C DOES NOT BEEP - jebem - 08-30-2014, 06:44 PM
RE: HP 41C DOES NOT BEEP - aurelio - 08-30-2014 07:00 PM
RE: HP 41C DOES NOT BEEP - Mark Hardman - 08-30-2014, 06:29 PM
RE: HP 41C DOES NOT BEEP - aurelio - 08-30-2014, 07:33 PM
RE: HP 41C DOES NOT BEEP - Mark Hardman - 08-30-2014, 07:41 PM
RE: HP 41C DOES NOT BEEP - aurelio - 08-30-2014, 07:56 PM
RE: HP 41C DOES NOT BEEP - Geoff Quickfall - 08-30-2014, 07:02 PM
RE: HP 41C DOES NOT BEEP - aurelio - 08-30-2014, 08:13 PM
RE: HP 41C DOES NOT BEEP - Geoff Quickfall - 08-30-2014, 08:25 PM
RE: HP 41C DOES NOT BEEP - aurelio - 08-30-2014, 08:54 PM
RE: HP 41C DOES NOT BEEP - Geoff Quickfall - 08-30-2014, 09:27 PM
RE: HP 41C DOES NOT BEEP - aurelio - 08-30-2014, 09:56 PM



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