Jumpers; Led Indicators; Table 18: Power Supply Board Test Points And Labels; Table 19: Cpu Board Test Points And Labels - Ohmart Vega W-4510 Technical Reference Hardware Manual

Diagnostics and repair
Power Supply Test point label
H1
H2
TP1
TP2
CPU Test point label
Count
GND
U5 pin8

Jumpers

The W-4510 Weigh Scale uses jumpers J1–J4 on the CPU board as division values for the
output frequency to the Smart Pro.
Note: Do not change the jumper from the current setting without consulting Ohmart Field
Service
If the W-4510 Weigh Scale does not have a jumper, the division value is one, and the output
frequency does not change.

LED indicators

Check the basic functioning of the Ohmart electronics at the instrument with LED indicators
on the CPU board. They are visible when you remove the explosion proof housing cap.
See the tables on page 123 for a summary of the LED indications.
122

Table 18: Power supply board test points and labels

Description
Not used
Not used
Isolated ground
Loop current test point 200mV/mA loop current. Referenced to isolated
ground.

Table 19: CPU board test points and labels

Description
Raw input signal coming from preamp.
Logic ground
+5V power supply test points referenced to Logic ground.

Table 20: Jumper division values

J1 Divide by 20
J2 Divide by 10
J3 Divide by 5
J4 Divide by 2
None Divide by 1

Figure 63: GEN2000 LED indicators

W-4510 Weigh Scale Technical Reference Manual
On
Blinking
Off