SECTION II
TESTING AND TROUBLESHOOTING
Table 2-1. Troubleshooting Guide
2.2 Troubleshooting Procedures
Table 2-1 is a Troubleshooting Guide which is used to
determine the cause of the malfunction.
Page 2-6Printed in U.S.A.
Problem Symptom Probable Cause Check Correction
Table seems powerless
even when plugged into a
wall outlet.
Line Power Pilot Lamp
does not illuminate (with
power cord plugged in).
Facility circuit breaker
providing power to table is
tripped.
Check to see if facility
circuit breaker is tripped.
If circuit breaker is tripped,
determine what caused the
circuit breaker to trip, correct
the problem, and then reset /
replace circuit breaker.
One of two 5 amp fuses in
the power cord receptacle is
blown.
Remove both 5 amp
fuses from power cord
receptacle and perform a
continuity check on the
fuses.
Replace any blown 5 amp
fuses.
RFI filter is blown. See Figure 5-1 for this
check. Check for 115
VAC ± 5.0 VAC across
Test Points A and B.
If 115 VAC ± 5.0 VAC is not
present across Test Points A
and B, replace RFI filter.
Refer to para 4.35.
Line power pilot lamp is
burned out.
Replace suspect line
power pilot lamp with
known working line
power pilot lamp.
Replace line power pilot lamp.
Refer to para 4.37.
Wires or wire connections
between power cord
receptacle and transformer
are broken, loose or dirty.
Perform a continuity
check on all suspect
wires or connections.
Clean any dirty connections.
Tighten any loose
connections. Replace any
broken connectors or wires.
Line Power Pilot Lamp
illuminates, but batteries
do not recharge and table
is powerless (with power
cord plugged in).
Thermal fuse(s) in
transformer are blown.
See Figure 5-1 for this
check. Check for 32.5 ±
2.0 VAC across Test
Points C and D and
across Test Points D
and E.
If 32.5 VAC ± 2.0 VAC is not
present across one or both of
the Test Point groups, replace
the transformer. Refer to
para 4.36.
Transformer is blown. See Figure 5-1 for this
check. Check for 32.5 ±
2.0 VAC across Test
Points C and D and
across Test Points D
and E.
If 32.5 VAC ± 2.0 VAC is not
present across one or both of
the Test Point groups, replace
the transformer. Refer to
para 4.36.
Charging / power driver
board is malfunctioning.
See Figure 5-1 for this
check. Check for 27.7
+/- 0.3 VDC across Test
Points F and G. Check
for 27.7 +/- 0.3 VDC
across Test Points H and
J. Check for 27.8 +/- 0.3
VDC across Test Points
K and L.
If proper voltage is not
present at Test Points,
replace charging / power
driver board. Refer to para
4.38.
Wires or wire connections
between transformer and
charging / power driver
board are broken, loose, or
dirty.
Perform a continuity
check on all suspect
wires or connections.
Clean any dirty connections.
Tighten any loose
connections. Replace any
broken connectors or wires.
Line Power Pilot Lamp
illuminates, but table is
powerless.
10 amp fuse on main
controller board is blown.
Perform continuity check
on 10 amp fuse.
Replace 10 amp fuse. See
Figure 5-1 for fuse location.
© Schaerer Mayfield USA, Inc. 2004
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