TM
5-5420-226-20-1
Symptom-73
DETAILED
TROUBLESHOOTING
PROCEDURE
SUPPORT
SYSTEM
- PERSONNEL
HEATER
T
(Continued)
j
Check for electrical
power at contact
C (CKT 402) of
control
panel heater
harness
connector.
Second
Technician
(Operator’s
Station)
l Set PERSONNEL
HEATER
HI/LO
switch
OFF.
l Set HEATER
MASTER
switch
OFF.
l Displace
master
control
panel (page
10-33).
l Disconnect
basket-control
panel
heater
harness
at
master
control
panel,
l Set multimeter
[o measure
18 to 30 volts dc, or use STE/
ICE Test No. 89 (page 4-81).
l Connect red probe of meter to panel connector
contact
C (CKT
402) and black
probe
to ground.
l Set HEATER
MASTER
switch
ON.
l Set PERSONNEL
HEATER
HI/LO
switch
ON-HI.
l Check if meter indicates
18 to 30 volts dc.
I
Does meter
indicate
18 to 30 volts dc?
m
I
18
Xm
Qii0 ‘:
km
%
l
X9
m,
\
1s1
-u-
+
+
0
GROUND
CONTACT
C
(CKT 402)
*
MASTER
CONTROL
PANEL
(REAR VIEW)
Check
control
panel
heater
harness for continuity
from panel
connector
contact C (CKT 402) to
PERSONNEL
HEATER
HI/LO
- switch
terminal
6 (CKT 402).
o
l See Step
39
.
/
\
TA107385
4-696
