Can i use vivitar 285 hv flash with my canon 30 d ?

You may order the part from here. The part is USD 6.50. The shipping cost will depend on what part of the world you're in.

The Vivitar 285 HV is specified to have a trigger voltage of 12V. The Nikon DSLRs are specified to be safe up to 12V. This puts the combination right at the fuzzy point. It should be safe, but if the flash goes a little high while the camera goes a little low, you might run into trouble.

The 285 (no HV) is definitely a no-go.

TR 2000 gives two output ^ volt and 330 volts.
Whereas 285 HV uses 6 volt and 110 volt AC
http://www.bhphotovideo.com/bnh/controller/home?O=details_accessories&A=kitInfo&Q=&sku=638035&is=REG
I am running my 285HV with external 6volt battery pack.sort of this type.
http://cgi.ebay.com/6V-1-3AH-SLA-Sealed-Lead-Acid-Rechargeable-Battery_W0QQitemZ390166216699QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item5ad7b7fffb
I added 2 standard diodes in series (IN4001 type) and placed inside the dummy battery pack which reduces some voltage and safeguards against wrong polarity.
more details? [email protected]

285 has high trigger voltage(+250v) ,where as 285 HV has less than 5.5 volts trigger voltage (which is safe to be used for any digital SLR). 285 HV has a Thyristor circuitory.

You don't need a Manual.
In 285 HV there is only one Power on/off switch.
If that switch is on and batteries are new Alkaline (like duracell-no chepo )or fully charged and working rechargebles,and yet the ready light do not come the flash has defect inside.For sure.

camera sync terminal wont work with even canon recommended flash.This can be the way to test your camera got damage.

Are you still having problems? [email protected]

It is the HV version, yes you can just put it in a color mode so the sensor on the front guesses the out put- it isn't ttl so it won't know what the camera is thinking

Do you have a DVM?

[email protected]

Personally, I would not try it. While the Canon has a protection system built into the camera, the trigger voltage on the Vivitar is pretty high. I have had good results using a 283 on a slave shoe, you will have to stop down more with the extra light