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SM830078
12. SERVICE PROCEDURES
66
66
6 Continuity of fuse on P.C.B. Ass’y
• Check for continuity using a multimeter
as shown in Fig. 19.
Method Used to Replace Fuse on PCB
Ass’y
1. Remove the PCB Ass’y from the electri-
cal component box.
2. Remove the fuse from PCB Ass’y using
pliers while heating the soldered leads
on the back side of the PCB Ass’y with
a soldering iron (30W or 60W). (Fig. 20)
3. For replacement, insert a fuse of the
same rating to the intended position and
solder it.
(Allow time to radiate heat during sol-
dering so that the fuse does not melt.)
When replacing the
fuse, be sure not to
break down the varis-
tor.
4) Thermistor Characteristic Curve
Fig. 19
1043_X_S
Soldering iron
PCB Ass’y
Fuse Varistor
Pliers
Fig. 20
1042_X_S
Fuse
NOTE
CAUTION
1 Room temp. sensor
(KTEC-35)
1 Coil sensor
(PBC-41E)
Resistance (kn )
50 59 68 77 86 95 104
10
9
8
7
6
5
4
3
2
1
Temperature (°F)
1044_M_I
–4 5 14233241505968
0
5
10
15
20
25
30
35
40
Temperature (°F)
Resistance (kn )
1045_M_I