The EL transsformer voltage is not shown in the service manual.

I recall the AC voltage being over 100 VAC to power the EL panel
when I measured it a long time ago.

If you are getting less than 100 VAC, I would check the capacitors
in the inverter circuit before replacing the EL panel.

I mounted a small toggle switch on the back of my PRO-2022
which turns off the display backlight by interrupting the DC voltage
to the inverter. I run PRO-2022 for 24 hrs/day and leave
the backlight off. It has been powered on continuously for
many years now and the backlight is as bright as a new one
when I switch it on.

On Fri, 08 Aug 2003 17:37:13 -0400, Bill wrote:

Would anyone know the output voltage of T13, the inverter transformer for the
luminescent display. My display went very dim, I have a voltage of approx. 35
vac. I was wondering if my display or the inverter went bad....

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Bob Parnass, AJ9S GNU/Linux User http://parnass.com