Du Pont SORVALL RC-5 Service Manual page 88

Drive
System
CircuitSorvall®
CentrifugesTable
4-2.
Troubleshooting
Chart,
Indicator
Circuits,
RC-5Check
for open
leadbetween
T201
YELand
POWER
indicator.Is
lead
open?Replace
BRAKE
switch.Test
for 28 V ac
betweenT201
YEL and
K205-3.Is
voltage
present?YESNOReplace
PC-20126.*Before
troubleshooting
theindicator
circuits,
determineif
the
lamp(s)
is burned
outby
replacing
it with a
knowngood
one.PROBLEM:
Indicator(s) does
notlight.*Check
for 28 V ac between
|
YEST201
YEL and T201
WHTIs
voltage
present?NONO
|
Does
POWER
indicatorlight?NOYESDoes
BRAKE
Indicatorlight?YESNO
| Does OFF
indicatorlight?YESDoes
ON indicator
[NOlight?YESSystem
in
control.Check
for 28 V ac
betweenT201
YEL and
K205-6.Is
voltage
present?YESNO8/79RCS/1414-4