C & K securitech 800

[Rew]

If anyone can help?
I have a 800l alarm which all seems to work ok, but when doing a bell test the internal and external sirens do not work.
The internal siren is going off but very very low volume. I did change the siren for a new one but still the same.
any help would be appreciated

Cheers

 

[sparkymarka]

Siren or speaker ? What’s the Internal sounder connected to on the pcb ?

 

[Rew]

hi thanks
its the speaker (next to the pcb) the wiring goes to the speaker + & - on the pcb.
so when open the cabinet door the speaker sounds but very quietly
I have fitted a new speaker

 

[sparkymarka]

Volume pot on the pcb ?

 

[sparkymarka]

How old is the battery ? Check voltage readings at aux …should be around 13.8 v dc
post picture of pcb …

 

[Rew]

I have just replaced the battery. I did try turning the volume pot screw but makes no difference.
The AUX reading is 13.78v

 

[sparkymarka]

Picture of speaker fitted , what rating in ohms ?

 

[Rew]

 

[sparkymarka]

Ok all looks good …have you tried fitting the speaker direct to the panel ? Or have you tried down powering the panel …and powering it back up again ….?

 

[Handymanjo]

To test external sounder remove bell trigger and touch onto 0v,does the bell ring ?.
Had a few old 700L where the speakers no longer work.
May be faulty speaker and sounder output.Time to look at changing control panel.

 

[Rew]

I have disconnected the battery and external fuse. is that powering down the panel?
just tried wiring speaker direct to pcb but still the same just very quite siren noise

 

[Handymanjo]

Have you a multimeter.
What is the voltage between +12v and bell trigger when you do bell test?.

 

[Rew]

I took the blue wire for bell trigger out and touched the - black to the left but no external siren?
the strobe lights are flashing

 

[Rew]

the blue trigger wire has 8 volts all the time? when bell test stays at 8v the when the bell test stops it drops off to 2v then comes back to 8v

 

[Handymanjo]

This would suggest that the external bell could be faulty and you need to check inside the bell box.
The bell test function would also suggest that the siren drive could be faulty also speaker drive could be faulty. Control panel therefore would need replacement.