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The whole chassis/bezel-CRT can be removed as an assembly through the front and kept intact for troubleshooting purposes. Remove the chassis screws where it attaches to the cabinet. This set is also covered in Howard Sams 343-18.
I have a model Z3000 that has the 17Z22Q/Space Command(er) chassis but I haven't done anything really intensive with it yet. One of the B+ caps is leaking so until I pull the chassis and fix the obvious it's going to have to wait awhile. I really like your cabinet design. Mine is a metal set with a faux blond wood finish that's not in the best of shape and sits on a pedastal with casters. At best, I would like to respray it in a close color and call it good, as well as refurbish the electronics..
The letters in the model number corrospond to the finish- E/blond, H/Cherry and R/Mahogany.
There is also another cap I'd be concerned with, and it ties between the B+ Boost and the B+. It is 10mfd 400V. Sams calls it a Non-Polar unit but Zenith does not make any special mention of it in their TV-17 manual as being such. Either way, that cap should be replaced too. Pull your chassis and see what kind it is. I'd bet you could use a standard electrolytic but if you ever lose B+ Boost then it could have a reverse polarity on it! You can make up a non-polar cap set-up by using two caps in series and tying the negatives together and using two 20ish mfd's.
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