Sharp R-2277, Service Manual

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29
R-2277
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
A1- A7 230V Approx. 225
Ω
+ Stirrer motor)
Output terminal (Earth) B1- Chassis 0