Test Data At A Glance - Sharp R-7A55 Service Manual

Parts
Fuse
Fuse
Fuse
Monitor resistor
Thermal cut-out
Thermal cut-out
Thermal cut-out
Thermistor
Grill heating element
Convection heating element
Oven lamp
High voltagr capacitor
Magnetron
High voltage transformer
In/Out put terminal
Input terminal (Power supply)
Input terminal (Stop switch)
Input terminal (Thermistor)
Output terminal (Grill heating element)
Output terminal (Convection heating element)
Output terminal (Fan motor)
Output terminal (Turntable motor and Oven lamp)
Output terminal (Convection fan motor)
Output terminal (Earth)
WARNING: DISCONNECT THE PLUG WHEN MEASURING RESISTANCE.

TEST DATA AT A GLANCE

Symbol
F1
F2
F3
R1
TC1
TC2
TC3
GH
CH
OL
C
MG
T
TEST POINTS ON CONTROL UNIT
Test Point
A1 - A3
B1 - B2
B5 - B6
N.O of RY5 - A1
N.O of RY3 - A1
A1 - A7
N.O of RY1 - A1
A1 - A5
B2 - Chassis
31
Value / Data
15A 250V
F6.3A 250V
F10A 250V
4.3Ω 20W
170˚C
125˚C
190˚C (Off point)
170˚C (On point)
Approx. 326 kΩ - 175 kΩ at 20˚C - 30˚C
Approx. 22 Ω. x 2 = 44 Ω
Insulation resistance > 10MΩ
Approx. 39Ω
Insulation resistance > 10MΩ
220 - 230 V 25W E14
1.2µF AC 2100V
Filament < 1Ω
Filament - chassis ∞ ohm.
Filament winding < 1Ω.
Secondary winding Approx. 81.7Ω.
Primary winding Approx. 1.22Ω
Resistance (Disconnect the
Volt power and door is closed)
Approx. 480 Ω
220 - 230V
- 0
DC. 5V Approx. 69 kΩ at 20˚C - 30˚C
Approx. 170 Ω
220 - 230V
Approx. 200 Ω
220 - 230V
Approx. 340 Ω
220 - 230V
Approx. 190 Ω
220 - 230V
Approx. 300 Ω
220 - 230V
- 0
R-7A55(W)/(B)
R-7E45(W)/(B)