kw-avx720 jvc black screen problem

[steliosssss]

hi!i have a kw-avx720 head unit and it has a black screen!!when i press power button it beeps and the dvd is spinning but nothing else!!is there anyone with the same problem to guide me or someone to give an idea?thanks

 

[DArends]

Hi sound like your back light or it's supply might be shot. Verify by testing it's terminal on the front end pcb.

 

[steliosssss]

i solve the problem!!!if anyone has the same problem check first f901-f902 they are fuses for the voltage of the screen !!if one of them
is off nothing works!!!

 

[Perry Babin]

If they fail again, suspect the filter caps in the circuit just after the inductors.

 

[steliosssss]

thanks! i hope they never fail again!!

 

[billydanger]

solution confirmed

I had the same problem with this model; No functions, only ATT button lit on face.

Took the thing apart and found fuses F901 and F902 (THANKS!). They were open so I replaced them.

Put the thing back together (not much fun) and the screen came on like a charm. It looks like it is going through an intro and the CD plays music normally.

BUT: it now looks like I have no button functions on the face. Not even the ATT button is lit up any more. Also there is no touch screen function, I mean there is an intro that tells me that it is ready for Bluetooth, etc. The JVC logo comes up etc. The CD was already inside and started up when I powered the unit. I have no volume control, etc.

Ideas? Thanks in advance.

 

[jvcerror]

I took it all a parts and it wasn't fun. couldn't find the f901/902 fuse . where is it located ?