Digital Multimeter Fuse

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  • corrize
    A funny fuse story – Lumix LX100 II
    by corrize
    Hello, I disassembled this dead camera, and found this WTF… Two fuses soldered one above the other !
    I was pretty sure nobody touched it before, but that can't be from factory. There is flux, and capacitor is probably missing.
    The other weird thing : the fuses are « G » fuse : (0.75A – 8V), seems very low. The original fuse should be « O » : (32V 2,5A).
    There is « O » mark beside. All fuses have the same mark letter on main board. So, I can deduce it's a « O » fuse.
    And this correspond to the issus I saw : when I plug the battery, I measure the voltage dropping...
    10-19-2023, 09:58 AM
  • Document Archive
    Surface Mount Fuses Fundamentals Datasheet
    by Document Archive
    TE Circuit Protection offers the widest selection of surface-mount fuses available for addressing a broad range of overcurrent protection applications. Helping to prevent costly damage and promote a safe environment for electronic and electrical equipment, our single-use chip fuses provide performance stability to support applications with current ratings from .5A up to 20A.

    TE Circuit Protection also offers the telecom FT600 fuse for telecommunications applications. This telecom fuse helps comply with North American overcurrent protection requirements, including Telcordia, GR-1089,...
    10-07-2024, 06:07 AM
  • mholin
    Beckman Industrial/(later Wavetek) Digital Multimeter DM27XT Repair
    by mholin
    Was testing to see if a bug zapper grid voltage (=< 2800VDC) had discharged yet. Set meter to highest range (1000 VDC) and probed across the grid. Heard an audible arc so voltage must have discharged into something in the front end of the meter. Now all functions that use the V-Ohm/Com input just reads "OL" (over range). Even the continuity test with the probes shorted reads OL with no beep. Opened it up and found input resistor R31 47 ohms, completely open. Replaced with new resistor but meter still reads "OL". The low battery icon on the display is visible even...
    08-18-2024, 12:58 PM
  • jesterace
    Samsung UE46ES8000 Blown fuse but no other signs of short
    by jesterace
    Hi I wonder if anyone might be able to steer me in the right direction. I have this Samsung UE46ES8000 TV and it went bang during use. The main fuse on the PSU board is open. I've checked every diode/mosfet/transistor I can see and nothing appears to be short to cause the fuse to go. The DC output of the bridge rectifier is not short either. I've seen online that some of these models are known for having their PFC mosfet or other mosfets shorting and blowing the fuse but i'm not seeing that here. If anyone aware of these models having any issues to cause this? I'm reluctant to just replace the...
    09-11-2024, 03:14 PM
  • CapSnap123
    Radio Shack Digital Multimeter Cat # 22-811
    by CapSnap123
    I'm trying to fix a digital multimeter. It was working until I blew the fuse (actually the "buzz" for continuity wasn't working). I've now replaced the fuse but it's acting strangely. When I turn the dial to V, nothing happens. But when I turn to anything else, it makes a continuous, very fast clicking sound - like the piezo buzzer is trying to do something. And at each position of the dial (other than V) there are brief flashes of life on the LCD. It doesn't seem to matter if the probes are connected. I wasn't sure where to start, so I've tested most of the diodes and cleaned the...
    12-28-2024, 06:33 PM
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