Troubleshooting Transient Protection Modules - Emerson Daniel Danalyzer 1000 Hardware Reference Manual

SEP 2005
C.3

TROUBLESHOOTING TRANSIENT PROTECTION MODULES

To determine the integrity of a transient protection module (TPM), follow the guidelines in
these tables (see Tables C-2, C-3, and C-4):
MOVs (M1-M4)
Resistors (R1-R4)
EQUIPMENT DAMAGE
Remove transient protection module from board before all ohmmeter checks.
Failure to do so may cause equipment damage.
MOVs (M1-M4)
Resistors (R1-R4)
Diodes (Z1-Z4)
C-4
Table C-2. Troubleshooting TPM, P/N 3-2350-002
P/N 3-2350-002
16-pin; Quad Sngl Tnst; Controller/Analyzer Interconnect,
Stream Switch, and Digital I/O (low current)
VISUAL INSPECTION
Good Blue in color
Failed Discolored to brown or black
Good Intact
Failed Broken, or open
OHM METER CHECK
Good Open, or infinite ohms
Failed Shorted, or 0 (zero) ohms
Good 330 ohms
Failed Open (infinite ohms) or short (0 ohms)
Good Open (infinite ohms) in one direction and 4.12 megohms in the
Failed Short (0 ohms) in any one or both directions
GUIDE TO TRANSIENT PROTECTION MODULES
opposite direction
MODEL 1000