Inspection Of Soldering Pads Of Dsp01 - Emerson ROSEMOUNT Analytical NGA 2000 Instruction Manual

NGA 2000 MLT Hardware
TEST PROCEDURE / TEST POINTS
TROUBLESHOOTING INSTRUCTIONS FOR PCB DSP01
11.3.2

Inspection of soldering pads of DSP01

For that part of troubleshooting, and especially for inspection of soldering pads LB1 and LB2, turn the
soldering side of DSP01 up.
Areas A and B where soldering pads LB1, LB2 and LB18 are located in, are marked in yellow in the
depiction above.
Below you see the soldering pads in areas A and B in enlarged depiction.
A
Soldering pads LB1 and LB2 must be con-
figured as shown in the picture. (LB1 open,
i.e. +5V of DSP01 are not used as supply
voltage for ICB20 bus pcb and LB2 closed,
i.e. GND of DSP01 must be connected to
GND of ICB20 bus pcb).
If configuration differs from description
above, communication problems between
DSP and ACU can arise (reconfiguration
necessary !).
B
Soldering pad LB18 must be 2-3 closed.
With that, troubleshooting procedure is fin-
ished. Please read the following consider-
ation to evaluate the inspection.
11 - 10
A
B
Fig. 11-7: Soldering pads on soldering side of PCB "DSP01"
Fig. 11-7a: Soldering pad "LB1" and "LB2 (PCB "DSP01")
B
Fig. 11-7b: Soldering pad "LB18" (PCB "DSP01")
Instruction Manual
90002929
+5V
GND
A
Emerson Process Management GmbH & Co. OHG
07/2006