Sl-p990 cd draw sj11 fast blow fuse

Hi I’m new to all this so please bare with me😁
Recently iv acquired a Technics sl-p990 plugged it in (first time in years) the draw opened put a cd in and that was it never opened again, I had a play and realised the laser was still operating so thought it were worth fixing. I found this forum and a thread with a problem exactly the same as mine. The sj11 quick blow fuse has blown,( While testing it i bridged it ) but was mistaken about the caps that needed changing and changed the c15 c16 and four others close together on the power side of the main pcb. Then used a very thin fuse wire between the sj11. But to avail. I then contacted rhiollyrubgt on this forum and he kindly explained the two silver caps on the motor board need replacing so I thought as I may of caused more problems it were best to change the whole board so I ordered the whole part taken from a sl-p350 put that in and n15 o fuze as I couldn’t get a n15 z, hey presto it works!! Draw opens with out blowing the fuse but no the cd isn’t spinning it appears to very slightly sometime but not enough grunt to get it spinning there is power at the +7.5v pin on the spinal part of the board. My question is have I blown a ic that was protected by the sj11, iv download manuals but the wiring diagrams are to complex and I can’t find the sj11 fuse either, any help would be much appreciated