Question about Two-Way Radios
Fuse fh 1001 blow out, radio has no display or sound. Fuse was replaced but still the ploblem. I have used AC and DC supply and no luck. When I conect the DC line the AC power supply was disconected. I follow the afected fuse line and test all the components on it.
Please, help me to solve this problem. Thanks
Make sure you're connecting the radio with the proper polarity. There is a protection diode inside that will cause the power supply fuse to blow or go into overcurrent shutdown if you have + and - reversed. It's also possible this diode has been shorted. You can't tell by looking at electronic components (unless they are physically damaged) whether they are good. An ohmmeter can be used to test for shorted diodes. Look at the board where the power leads connect for the diode.
Posted on Mar 22, 2010
Testimonial: "thank you, bad diode replaced and now works fine"
Posted on Oct 04, 2011
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