BoostedOne
Well-known member
Anyone happen to know, or have one of these machines that would be willing to check the nominal resistance on the pins for the scale?
I finally managed to pick up a recycling machine, woo hoo! Its an earlyish 34700. I got it back to the shop and powered it up and it worked for like 10 seconds and died. After messing around a bit, deduced that maybe the main board died. Managed to find a NIB main board on eBay, RA19432. From what I can tell this one is from a 1998 era unit.
When I go to power it up if I have the scale plugged in, the unit will not turn on. If I unplug the scale, the unit fires up just fine.
My machine looks to have used a scale with a number of RA19008, and its the "newer" older four pin scale.
The new mainboard I have, RA19432, looks to use a scale with a part number RA19469.
What I am trying to figure out what the resistance is across the four pins on the 19469 scale. If I measure between Pin 1 and 4, I get almost zero ohms. Pin 1-2, 1-3, 2-4,3-4 is 60 ohms, and from 2-3 is 120 ohms. I am trying to figure out if the new scale is a different nominal resistance on the bridge, or if the pinout has simply changed. I don't necessarily want to buy the new scale if I dont have to, but I will. I just dont want to buy the new scale only to find out the problem is something totally different.
To a lesser extent, also baffled as to how I can have zero ohms across pins 1 and 4, with the resistances between the other pins is as mentioned above, and when on the board one is VCC and the other is gnd.
Thanks!
I finally managed to pick up a recycling machine, woo hoo! Its an earlyish 34700. I got it back to the shop and powered it up and it worked for like 10 seconds and died. After messing around a bit, deduced that maybe the main board died. Managed to find a NIB main board on eBay, RA19432. From what I can tell this one is from a 1998 era unit.
When I go to power it up if I have the scale plugged in, the unit will not turn on. If I unplug the scale, the unit fires up just fine.
My machine looks to have used a scale with a number of RA19008, and its the "newer" older four pin scale.
The new mainboard I have, RA19432, looks to use a scale with a part number RA19469.
What I am trying to figure out what the resistance is across the four pins on the 19469 scale. If I measure between Pin 1 and 4, I get almost zero ohms. Pin 1-2, 1-3, 2-4,3-4 is 60 ohms, and from 2-3 is 120 ohms. I am trying to figure out if the new scale is a different nominal resistance on the bridge, or if the pinout has simply changed. I don't necessarily want to buy the new scale if I dont have to, but I will. I just dont want to buy the new scale only to find out the problem is something totally different.
To a lesser extent, also baffled as to how I can have zero ohms across pins 1 and 4, with the resistances between the other pins is as mentioned above, and when on the board one is VCC and the other is gnd.
Thanks!
Last edited: