Ohmart Vega W-4510, Technical Reference Hardware Manual

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Diagnostics and repair
114 W-4510 Weigh Scale Technical Reference Manual
Figure 55: Smart Pro analog output (mA/mV) flow chart
Analog Output (mA/mV)
#2
#1
Does
U2 side of R5
m15VDC
to U2-8?
Start
Refer to power
supply flow chart
If mA selected,
JP1 not installed
Set output equal
to 50%
If mV selected,
JP1 installed
Does
TB4(11-12)
measure 12mA
or 50mV?
Check I/O signal
cable or replace
CPU
External wiring or
controller
problem
Yes
No
Yes
No
Yes Yes
mA mV
Does
U2 (8-4) measure
-15VDC?
Refer to power
supply flow chart
Yes
No
Does
U15 side of
R32 measure
+15VDC to
U15-8?
Start
Refer to power
supply flow chart
If mA selected,
JP2 not installed
Set output equal
to 50%
If mV selected,
JP2 installed
Does
TB3(6-7)
measure 12mA
or 50mV?
Check I/O signal
cable or replace
CPU
External wiring or
controller
problem
Yes
No
Ye
s
No
Yes Yes
mA mV
Does
U15 (8-4) measure
-15VDC?
Refer to power
supply flow chart
Yes
No