Quantegy 456 Tape Reel(1/2 in. x 10 1/2 in. x 2500 ft.) "thread player" Questions

Tascam 22-2 no sound I was given a Tascam 22-2 and some reels to evaluate. I threaded the reel, it appears to feed and uptake correctly. But there is no sound, does this machine require external ...