ASDA durabrand radio model no. LEDAB0701 information bar has stopped working
Hi - As per original question, NOT A TV, the LEDAB0701 is an ASDA Durabrand DAB Radio, so no remote! Just hit this problem - and found a work-around. Sound always worked - display and backlight failed. Could not spring radio apart - as well as the screw in the battery compartment - there seems an anchor the other end that defeated me. I run off the supplied Power supply and rechargeable batteries. The batteries ran down and I plugged the psu and display came back - for a few minutes! The sealed Power Supply unit (psu) is probably unregulated non-switched mode type. It gave 15.6v unloaded. Unregulated psu's normally run 1.4x nominal voltage with no load and are pulled down to the nominal voltage as the load current is taken (i.e. ASDA psu should have been 9v x1.4 =12.6v not 15.6v).
Seems the radio is sensitive to high psu voltage as when I ran off a regulated psu - problem partly went away. Regulated means you get whatever voltage you set whether no load, half load or full rated load.
Also once switched off fault appears the internal batteries were keeping the display off setting. I used a 12v 1A variable regulated psu. It has 9v, 6v, 5v settings. 5v is too low. 6v works when already running but it needs 9v to start. However the problem is that the display will still switch off if I run for a long time on 9v, so I have to switch down to 6v. Alternative, start on battery and plug in 6v works [6xAA=7.2v nominal, range: 8.5v down to 6v]. Seems some internal components of radio or psu have drifted/become faulty.
You need a positive center/hole polarity. Ideally aim at 500mA or greater replacement psu. Ideally use a variable one so it can be used for other things if your problem is different and this is not the solution. If you have an unregulated variable psu (400mA or greater) try running at 6v (will be higher but perhaps not too high) then switch to 4.5v or 5v (again will be 1.4x higher) but make sure it is set to positive centre/hole.
Apr 12, 2014 |
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