View Single Post
  #23   Report Post  
Posted to sci.electronics.repair
Phil Hobbs Phil Hobbs is offline
external usenet poster
 
Posts: 635
Default Harman Kardon 930 lost channel. Hoe to trouble shoot ?

On 10/12/18 9:01 AM, wrote:
An infra-red heat gun is better at very close range. It will show variations of fractions of a degree.


Providing that the thermal infrared emissivity of the surface is high,
e.g. plastic or glass. A dab of grease or some tape will make it work a
lot better.

Cheers

Phil Hobbs


--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
http://hobbs-eo.com