[TenTec] 255 PS HELP

[James D. Duffer]

ARDUJENSKI@aol.com wrote:

> SYMPTOM: The voltage dropped under load. For example the radio in rcv the
> voltage was about 13v. Plug in the 229 tuner to run the three 1892 bulbs and
> the voltage dropped to 6v. Now the PS keeps blowing the internal fuse
> (32v-20amp). There is no evidence of damaged parts.
> 
Normally I would suspect open series pass transistor, however, this is
not consistent with the blowing of internal fuse.  I think you may have
to do some troubleshooting starting with the biasing of the pass
transistors, if the out put of the rectifier is also low, check bridge
rectifier and/or resistance at output for possible low resistance to -12
bus (this may be ground).

Good luck with it.

73 WD4AIR

--
FAQ on WWW:               http://www.contesting.com/tentecfaq.htm
Submissions:              tentec@contesting.com
Administrative requests:  tentec-REQUEST@contesting.com
Problems:                 owner-tentec@contesting.com
Search:                   http://www.contesting.com/km9p/search.htm