Read Sharp R-2277 Service Manual online
29
R-2277
R-2287
R-2287
Parts
Symbol
Value / Data
Weak point
WP1 , WP1
A018 for R-2287
Fuse
WP1, WP2
M6.3A for R-2277
Weak point
F1
A017 for R-2287
Fuse
F1
13A for R-2277
Fuse
F2
F6.3A 250V
Thermal cut-out (Mag)
TC1
145˚C
Thermal cut-out (Mag.)
TC2
145˚C
Thermal cut-out (Blower motor)
TC3
115˚˚C
Thermal cut-out (Oven)
TC4
115˚˚C
Thermistor (Exhaust)
Approx. 77.45k
Ω
at 15˚C, 61.47K
Ω
at 20˚C, 49.12K
Ω
at
25˚C
Thermistor (Intake)
Approx. 15.8k
Ω
at 15˚C, 13.03K
Ω
at 20˚C, 10.74K
Ω
at 25˚C
Thermistor (Magnetron)
Approx. 15.91k
Ω
at 15˚C, 13.04K
Ω
at 20˚C, 10.74K
Ω
at 25˚C
Monitor resistor
R1
4.3
Ω
20W
Oven lamp
OL
250V 25W
High voltage capacitor (R-2287)
C1, C2
1.07
µ
F AC 2100V
High voltage capacitor (R-2287)
C1, C2
0.94
µ
F AC 2100V
High voltage transformer (R-2287)
T1, T2
Filament winding < 1
Ω
Secondary winding Approx. 57
Ω
Primary winding Approx. 1
Ω
High voltage transformer (R-2277)
T1, T2
Filament winding < 1
Ω
Secondary winding Approx. 83
Ω
Primary winding Approx. 2
Ω
Magnetron
MG1
Filament winding < 1
Ω
Filament winding - chassis
∞
Ω
Magnetron
MG2
Filament winding < 1
Ω
Filament winding - chassis
∞
Ω
TEST DATA AT A GLANCE
WARNING: DISCONNECT THE PLUG WHEN MEASURING RESISTANCE.
TEST POINT ON CONTROL UNIT
Resistance (Disconnect the
In/Out pit terminal
Test Point
Volt
power plug and close the door.)
Input terminal (Power suplly)
A5- A7
230V
Approx. 790
Ω
Output terminal (Stop switch)
B1- B2
0
Output terminal
(Oven lamp +Blower motor
(Oven lamp +Blower motor
A1- A7
230V
Approx. 225
Ω
+ Stirrer motor)
Output terminal (Earth)
B1- Chassis
0
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