Connect powered subwoofer to system with no pre-out connector?

hook your dvd player up to the tv via hdmi, then take the optical audio output from you tv to the soundbar. Make sure to enable to audio output jack in the tv setup menu as some manufacturers disable this jack by default.

The user manual for the device should contain a schematic of the various cable sockets:
Sony HT CT150 manual

you may need an extra amplifier for your subwoofer.

I hope I understand you correctly.

As you can probably tell from the very different connector types on the subwoofer and the HTS, they don't match up. That speaker system and this electronics are not meant to be used together.

The SC-BT200 uses passive subwoofer while the SB-WA342 is an active (powered) subwoofer.

http://www.retrevo.com/support/Panasonic-SC-BT200-Home-Theater-Systems-manual/id/23459dj389/t/2/

The Subwoofer is Likely Passive....meaning no amplifier is within the enclosure itself....the incompatible connectors mean you cannot connect the subwoofer itself to your surround sound system.

look for a Suitable stand-alone (1 Channel) Amplifer with sufficent power.....connect the RCA Imputs (subwoofer cable) to the Recievers RCA subwoofer output....then connect the amplifier's output to the the wire going into the subwoofer enclosure....if there is a plastic connector simply cut it off and strip the wires down a sufficent lenght....then secure the wires to the output of the amplifier.

if you do this make sure you know the ohm rating of the subwoofer and the minimum ohm rating of the amplifier your using.

Hi sorry to say cant go direct.

What you can do if really want it running is get a RIAA pre amp with power supply (search google local shops). The turn table plugs into that, then that plugs into one of the analogue inputs of the Q70. That will work great if prepared for the effort!

Best of luck

Check all of your connections, and make sure all cords are firmly connected.
Make sure if the subwoofer has a power switch, it is on, and if not, that it is likely to be faulty.

Did you read the manual or just started to try and connect everything?
what do you mean by HT slots? I hope not the slots on teh back of the device itself....

Just check here,1 cable from the device to the subwoofer, the speakers should be connected to teh subwoofer: http://www.p4c.philips.com/cgi-bin/dcbint/faqview?scy=US&subrequest=1&mid=Link_FAQs&view=aa12_view_full.html&desc=Philips+DVD+Home+Theater+System+HTS3450+DivX+Ultra&session=20090417124015_94.209.249.65&list=aa12_list_partial.html&slg=AEN&refnr=0006801&refdisplay=AVS_HTS_031&dct=QAC&ctn=HTS3450/37

Can you try another type of output from the Comcast box?
It could be their box.