Introduction
If your Alan 48 Excel has poor reception or no reception at all, you should check the Q104 transistor receiver section and replace it if necessary.
What you need
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First of all: Power off! Switch it off and unplug the device.
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Then grab your screwdriver and undo the screws on the housing.
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Carefully lift off the housing and put it to one side.
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Check all cables and connections. Are they properly seated?
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Time for some contact spray and brushes! Spray the connections thoroughly.
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Wait a few minutes, then wipe away the residue with a clean cloth.
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Find the transistor “Q104 (KTK 161)” on the circuit board. Here it is:
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Take your multimeter and check the transistor. If it is defective, it must be replaced.
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In order to replace the transistor, carefully desolder the connections. This is where you need to start:
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Insert the new transistor and solder it in place.
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Check the connections with the multimeter to make sure that everything is properly working.
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Put the housing back on and tighten the screws.
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Plug in the plug, switch on the device.
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Test whether the reception is now better.
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That's it! With these steps, your Alan 48 Excel should have top reception again. If not, a major repair may be necessary.
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