Quad FM3 Bulbs

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12-Dec-2017 07:18 AM

sim

sim

Posts: 8

Hi,

Recently, my FM3 tuner got a bulb blown on one of the 2 mono bulbs.. I did a purchase on ur webshop on these new bulbs >Lamp 14V 0,7W 5mm CML...

When I replaced it... the new light bulb remain light up rather than flickering when tuning to other FM frequency...  the other mono and stereo bulbs are ok. Any idea how to fix this. Any advise.

thanks 

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13-Dec-2017 11:17 PM

EJP

EJP

Posts: 1469

There are no 'mono bulbs' in an FM3. There is a panel lamp (the one on the bar in the RF cage), which is permanently lit; there is the stereo indicator, on the other side, and in the middle the two tuning lamps. You may have to rebalance those after replacing one by adjusting the associated trimpot when accurately tuned to a station. If they won't come into balance you will need to investigate the transistors that drive them, and the transistors that drive those, and their controlling resistors, etc.
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