Toshiba vcr model:M-68C plays for 5 seconds then stops

Toshiba 4 head hi-fi stereo vcr model:M-68C,year:Aug 1999,CSA File No:LL38329 (Samsung),pcb board model:M-685 (also VR8800),the vcr plays,fast forwards or rewinds for about 5 seconds.During play the idler wheel does not move only the capstan motor and pulley therefore the vcr eats tape. I cleaned the mode switch and inspected and cleaned the idler wheel assembly but no go,according to a repair tip from:

for a model:M-65C it states that the take up reel sensor (photo interrupter) pcb location:PT601=Toshiba # 70796241 or generic # SG-105L is defective,is this true? if so can someone verify the part # for my model as the above part is for model:M-65C as I looked at the part # look up sites below but could not find it:

Part # lookup sites does not list it:

I also look for my model at these free Toshiba service manual download sites but could not find mine:

Nor could I find it here:

then click on "click here to see the files" followed by "video" followed by "products".Thanks in advance for help.

Sidney E-mail:sidneybek(at)yahoo.com Dartmouth,Nova scotia Canada