[TechAssist] Re: PTK 169PTC P60153EB reg. B+ too high shutsdown
- From: "James M. Knoble" <jmk1938@xxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Tue, 3 Feb 2004 19:27:18 -0400
If your reg voltage is too high why go to the hor out stage. Pin 1 and 2 on
the reg are feedback that affect reg voltage.Power up with your variac and
see if you get a PWM waveform on Pin 2 (3.2vp/p) and on Pin 1 2.6vp/p.PWM for
Pin 2 is generated by Q%, Q4106, and Q4107. Should be 15vp/p on the col of
Q4107 with 11vdc.This is controlled from Pin 9 of T4102.This is raw 145vdc
and must be well filtered. Pin 13 of T4102 is the feedback for Pin 1, and on
Pin 1 there should be 2.6vp/p, with .024vdc.
Even at 80v input you will have these waveforms. Call me if you like, between
7-9 pm est.
you get --------------------------
James M. Knoble
jmk1938@xxxxxxxxxx
P: 304-366-1938
F: 304-367-8965
--------------------------
KnobleNet Webmail
(http://www.knoble.org)
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