dead ktn-1401

13 views
Skip to first unread message

TED HURLEY

unread,
Dec 2, 2020, 9:28:45 PM12/2/20
to
i have a model ktn-1401 dead with ringing. replaced horz output transistor. was shorted. still rings








i have a model ktn-1401 dead with ringing. replaced horz output transistor. was shorted. still rings












John Robertson

unread,
Dec 7, 2020, 3:51:03 AM12/7/20
to
On 2020/12/02 6:28 p.m., TED HURLEY wrote:
> i have a model ktn-1401 dead with ringing. replaced horz output transistor. was shorted. still rings
>
>

What are you using to test the rings on this Kortek monitor? Usually you
need 7 or 8 rings for the flyback to be good.

What is happening after you replaced the HOT - did it again short out?
Does the HOT have a built-in back EMF diode or is there one on the
circuit board - it may be open. Or if you substituted a different HOT
the substitute may not have a diode built in...

John :-#)#

--
(Please post followups or tech inquiries to the USENET newsgroup)
John's Jukes Ltd.
MOVED to #7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3
(604)872-5757 (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."
Reply all
Reply to author
Forward
0 new messages