The service was good but it just a little late for the download. It seems that it needs to clear the payment but the payment was settled by paypal. As far as my concern, it should be able to download after the confirmation of sold.
Text excerpt from page 5 (click to view)
[ 1.3 ] B Board Removal
Remove the cover and front panel as indicated in [1-1] and [1-2]. Disconnect CN600 power cord and remove from unit. Remove the 1 Philips screw from the rear panel. Remove the 3 Philips screws from the circuit booard. The B board can then be lifted clear of the chassis.
==> ==> ==>
CN600
Screws
Screw Screw
==>
[ 1.4 ] Chassis Removal
To remove, lift the front of the chassis slightly to clear the stops and slide forward out of the bottom cover.