Problems - Tuner not changing station
This page covers a problem of tuners that do not respond to changes of station. Possible causes of this problem are shown below. It is assumed here that the tuner was changing station properly when the system was installed.
Our systems control sources such as radio tuners by using blink emitters. These output a signal that emulates the IR signal sent by source's own remote control. They should be fixed on the tuner over the area where the IR receiver is located. Sometimes, due to cleaning for example the emitter drops off. To fix this problem simply refit the blink emitter to the correct location on the tuner. Often this is identified by a round black or clear spot.
Sometimes a blink emitter may drop off and a person may refit it in the wrong place. This means it will not work. The correct position is not always clearly indicated and it may be necessary to try different positions to find the correct one.
The blink emitter should flash when you change the radio station. If it is the visible type you should see it flash red. If it is the infrared type you should be able to see it flash on a mobile phone camera. There is no guaranteed way to tell the two types apart just by looking at them. When you select a radio station, different from the one already playing, on a wall pad the blink emitter should flash.
If the blink emitter does flash you should see the display on the tuner selecting the chosen preset. If there is no reaction from the tuner, check that the blink emitter is in the right place and that the configuration is correct. The correct place for the blink emitter is where the IR receiver is, which is often marked on the front panel.However, some front panel markings can be deceptive.
If the emitter does flash there are several possible causes.
The blink emitter may have been plugged into the wrong socket. Perhaps it became unplugged during cleaning and was plugged back in wrongly.
It should be plugged into the correct IR output for the source to which it is connected. Usually source 1 will be the first name shown on one of the pads when you play the system but this is not always the case, it may be changed by the PC configuration software.
This is not common but if you suspect it to be the case you should swap the blink emitter for a new one. Visible ones are recommended because you can see them working.
This is not common unless the output has suffered some form of abuse, such as some unauthorised product being plugged in to it. If the output has been damaged it may be possible to configure the unit so that the source uses a different IR output.