I got my Doctor Who pinball last week. It also worked fine at the sellers house. I drove it 45 miles to my house. As soon as I set it up and leveled it, I powered it up. Same as you I got the dreaded CW and CCW errors. Which means that the OPTO just below the Mini-playfield motor is not working. What I found in my case, was that a plug going from the Optos had come uplugged. It had caught on the speaker in the bottom of the cabinet. Once I plugged it back in, it worked for me. The 4 pin plug in the center of the picture attached (wires: white, green, grey, black). If that plug is attached, then it is further up that set of wires. Good luck. I have also found that the Doctor Who Club pages here on pinside full of useful info. https://pinside.com/pinball/forum/topic/doctor-who-owners-clubtime-lords-welcome?tq=CCW&tu=
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