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– 44 –
SM830079
11. SERVICE PROCEDURES
66
66
6 Continuity of fuse on P.C.B.
Ass’y
• Check for continuity using a multim-
eter as shown in Fig. 19.
Method Used to Replace Fuse on
PCB Ass’y
1. Remove the PCB Ass’y from the
electrical component box.
2. Remove the fuse from PCB Ass’y
using pliers while heating the sol-
dered 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
varistor.
4) Thermistor Characteristic Curve
CAUTION
NOTE
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
Fig. 19
Fig. 20
1043_X_S
Soldering iron
PCB Ass’y
Fuse Varistor
Pliers
1042_X_S
Fuse