CLARION VRX935VD error 6 ?

HI, I HAVE A CLARION VRX935VD, UNIT WORKS, EVEN THE CD MUSIC DISK WORKS BUT I CAN NOT GET ANY DVD'S TO PLAY, IT TRIES TO READ AND COMES UP WITH AN ERROR CODE 6, IS THERE AN IC THATS BAD AND WHICH ONE, I OPENED IT UP BUT IM STUCK, I DONT HAVE A SCHEMATIC AND REALLY WANT TO REPAIR IT, I HAVE SOME TECHNICAL SKILLS BUT STUCK W/O A SCHEMATIC, ANYONE KNOWS WHICH COMPONENT IS FAULTY? PLEASE HELP,