Read Sharp R-4G75M (serv.man4) Service Manual online
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R-4G75(W)M
R-4G75(B)M
R-4G75(B)M
TEST DATA AT A GLANCE
Parts
Value / Data
Fuse
13A / 250V
Fuse
M8A / 250V
Monitor resistor
0.8
Ω
20W
Thermal cut-out (MG)
125
°
C
Thermal cut-out (OVEN)
160
°
C
Thermal cut-out (GRILL)
150
°
C
Oven lamp
200–250 V 25W E14
High voltage capacitor
1.2
µ
F AC 2100V
Magnetron
Filament < 1
Ω
Filament – chassis
∞
ohm.
Power transformer
Filament winding < 1
Ω
Secondary winding Approx. 82
Ω
Primary winding Approx. 1.3
Ω
TEST POINT ON CONTROL UNIT
Resistance (Disconnect the
In/Out put terminal
Test Point
Volt
power plug and close the door.)
Input terminal (Power supply)
A3–A5
240V
Approx. 905
Ω
.
Input terminal (Stop switch)
B1–B2
–
Shorted
Output terminal (Oven lamp,
A1–A3
240V
Approx. 195
Ω
.
Fan motor, Turntable motor)
Output terminal (Power transformer)
NO. of RY2–A3
240V
Approx. 1.6
Ω
.
Output terminal (Earth)
B2–Chassis
–
Shorted
Output terminal
NO. of RY3–A3
240V
Approx. 65.3
Ω
.
(Grill heater)
WARNING: DISCONNECT THE PLUG WHEN MEASURING RESISTANCE.
