Fluke/Philips PM2811 repair

[IbnBattutiFrutti]

I recently acquired a Fluke (Philips) PM2811 DC power supply. Unfortunately, the previous owner had failed to properly seat one of the PCBs. So when I slid off the cover for the first time, a small transformer on a daughterboard caught against the cover and underwent rapid unscheduled disassembly. 

Service manual link is below. The daughter board is on the PCB layout on page 56, labeled T101. The wiring diagram on page 57 lists it as "7105-2 EL Inverter DC 5V / AC 115V".

https://www.eevblog.com/files/philips_pm2811_pm2812_pm2813_sm.pdf

Long story short, it seems that this is a 5vdc to 115vac inverter that outputs to "VBL+"  and "VBL-". I'm assuming BL is backlight?

Is there a module that I can substitute in here? I'd reverse engineer the daughter board, but the transformer is in pieces and has no markings.

[Chris56000]

Hi!

. . .Any good?

https://a.aliexpress.com/_EJkE6mp

. . .You should be able to obtain 12 V to operate this from elsewhere in your power supply unit!

Chris Williams

[srb1954]

I recently acquired a Fluke (Philips) PM2811 DC power supply. Unfortunately, the previous owner had failed to properly seat one of the PCBs. So when I slid off the cover for the first time, a small transformer on a daughterboard caught against the cover and underwent rapid unscheduled disassembly. 

Service manual link is below. The daughter board is on the PCB layout on page 56, labeled T101. The wiring diagram on page 57 lists it as "7105-2 EL Inverter DC 5V / AC 115V".

https://www.eevblog.com/files/philips_pm2811_pm2812_pm2813_sm.pdf

Long story short, it seems that this is a 5vdc to 115vac inverter that outputs to "VBL+"  and "VBL-". I'm assuming BL is backlight?

Is there a module that I can substitute in here? I'd reverse engineer the daughter board, but the transformer is in pieces and has no markings.

It might pay to also check that the EL panel itself is still working as they have a tendency to fail over time. If the EL panel has failed replacing it with an LED backlight might be a better option, providing you can find one that is thin enough to fit under the LCD module. The LED panel could run directly off the +5V supply without the need for an additional inverter.

[IbnBattutiFrutti]

Hadn't thought of going LED. Will definitely try that, thanks!