Rows target the upper back so your lats won't really feel much as your arms fatigue quite quickly.
Chin-ups are the ticket.
Pull-over type machines come into their own here, if you have one use it.
With a relatively light weight, do as many as possible, 20 is a good target, go to fatigue, the run to a pulldown type machine and continue, a hammer high pull is a good choice, I promise you will recieve lat burn, the trick is to not rest between the two.
After a month of this you will be able to activate lats when chinning.
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