powering 4424LD+ Display

[AndrePa]

Hi, I need help. I have 4424LD+ Phone, 1151 power supply, but No M4BK cable. Phone works, except display!
The1151 power supply powers pin 7 ( negative ), and pin 8 ( positive ).
I believe power for the 4424LD+ delivers power on the Black/Yellow pair (pins 2 and 5 of the 6 pin jack). Dose anyone know the polarity?

thanks, Andre

 

[AndrePa]

Luckily I'm a pack-rat, I found a MSP-1 power supply in a box of old System 75/85 Stuff. MSP-1 has 3 modular jacks; Line, -2 +5, and -7 +8. I rolled the dice, and it worked! Just FYI Pin#2 is negative, and pin#5 is positive, for powering the dispaly on 4424+LD.