[Premium-Rx] WJ-8888B-2 Help

[Francesco Clonfero/tin]

Hello to the group Menbers.
My WJ-8888B-2 receiver after years of good service is now working only in AM and FM mode.
I have checked the supply voltage and are OK,tried to clean boards contact.....
I have the Service Manual of the WJ-8888 with the supplement for WJ-8888-5 unfotunatly there are some big difference.
I would appreciate as first help any suggestion for troubleshooting and for attempting to approach the repair of this receiver. 
In addition I would like to receive indication about the possibility to procure the applicable manual and also if you know about some one that can do the repair?
Regards,
IW2BRB Francesco