The van was stationed to cover the swearing-in ceremony of new Punjab Congress chief Partap Singh Bajwa.
A number of Central and state Congress leaders, including Union minister Manish Tewari were attending the ceremony inside the PPCC headquarters.
No one was injured as the engineers and driver accompanying the van were standing outside the vehicle.
A senior officer of the Jalandhar Doordarshan Kendra said that the cause of the fire was not known.
"The cause of the fire and the condition of the van will be examined by technical experts after which it would be known whether it can be repaired or not," he said.
A Jalandhar DDK engineer told PTI that as per preliminary reports it was suspected that the fire took place due to the heating up of the generator.