31
R-7A55(W)/(B)
R-7E45(W)/(B)
TEST DATA AT A GLANCE
Parts
Symbol
Value / Data
Fuse
F1
15A 250V
Fuse
F2
F6.3A 250V
Fuse
F3
F10A 250V
Monitor resistor
R1
4.3
Ω
20W
Thermal cut-out
TC1
170˚C
Thermal cut-out
TC2
125˚C
Thermal cut-out
TC3
190˚C (Off point)
170˚C (On point)
Thermistor
Approx. 326 k
Ω
- 175 k
Ω
at 20˚C - 30˚C
Grill heating element
GH
Approx. 22
Ω
. x 2 = 44
Ω
Insulation resistance > 10M
Ω
Convection heating element
CH
Approx. 39
Ω
Insulation resistance > 10M
Ω
Oven lamp
OL
220 - 230 V 25W E14
High voltagr capacitor
C
1.2
µ
F AC 2100V
Magnetron
MG
Filament < 1
Ω
Filament - chassis
∞
ohm.
High voltage transformer
T
Filament winding < 1
Ω
.
Secondary winding Approx. 81.7
Ω
.
Primary winding Approx. 1.22
Ω
Resistance (Disconnect the
In/Out put terminal
Test Point
Volt
power and door is closed)
Input terminal (Power supply)
A1 - A3
220 - 230V
Approx. 480
Ω
Input terminal (Stop switch)
B1 - B2
-
0
Input terminal (Thermistor)
B5 - B6
DC. 5V
Approx. 69 k
Ω
at 20˚C - 30˚C
Output terminal (Grill heating element)
N.O of RY5 - A1
220 - 230V
Approx. 170
Ω
Output terminal (Convection heating element)
N.O of RY3 - A1
220 - 230V
Approx. 200
Ω
Output terminal (Fan motor)
A1 - A7
220 - 230V
Approx. 340
Ω
Output terminal (Turntable motor and Oven lamp)
N.O of RY1 - A1
220 - 230V
Approx. 190
Ω
Output terminal (Convection fan motor)
A1 - A5
220 - 230V
Approx. 300
Ω
Output terminal (Earth)
B2 - Chassis
-
0
TEST POINTS ON CONTROL UNIT
WARNING: DISCONNECT THE PLUG WHEN MEASURING RESISTANCE.