HP-82183A... Problem with ASTEC 0950-0408 :(

[Titi]

(06-30-2017 01:06 AM)Paul Berger (Canada) Wrote:  

(06-29-2017 09:35 PM)Titi Wrote:  I find +5.04v here ! U3-pin 3 : 13.92v (with jumper W1)

The voltage on U3-3 is ok. It is connected to the print head voltage which is variable depending on the intensity setting, I believe that with the board out of the printer it would be the equivalent of the lightest setting, I measure about the same voltage with the intensity turned all the was down.

I measure with the board in... I find +17.4v with hightest setting.
My other tests about U3 (pin #)

1 : 5.42
2 : 6.45
3 : 13.89 (Vh)
4 : 5.09
5 : 4.75
6 : 6.42
7 : 5.05
14: 17.26
C7+ : 4.50 (Vbs)
U2 :5.07 (Vp) / 0.68 / 13.91