Sharp R-22AM Service Manual

39
R-22AM
R-23AM
R-23AT
Parts Symbol Value / Data
Weak point F1 A017
Fuse F2 F6.3A 250V
Fuse F3 M8A
Fuse F4 M8A
Temperature fuse (Mag) TF1 150˚C
Temperature fuse (Mag.) TF2 150˚C
Temperature fuse(Blower motor) TF3 120˚C
Temperature fuse (Oven) TF4 120˚C
Magnetron thermistor Approx. 373kΩ at 15˚C, 292KΩ at 20˚C, 231KΩ at 25˚C
Oven thermistor (1) Approx. 373kΩ at 15˚C, 292KΩ at 20˚C, 231KΩ at 25˚C
Oven thermistor (2) Approx. 16kΩ at 15˚C, 13KΩ at 20˚C, 11KΩ at 25˚C
Monitor resistor R1 4.3Ω 20W
Oven lamp OL 250V 25W
High voltage capacitor C1 0.94µF AC 2300V
High voltage capacitor C2 0.94µF AC 2300V
High voltage transformer T1, T2 Filament winding < 1Ω
(for R-22AM) Secondary winding Approx. 75Ω
Primary winding Approx. 1.8Ω
High voltage transformer T1, T2 Filament winding < 1Ω
(for R-23AM/ 23AT) Secondary winding Approx. 75Ω
Primary winding Approx. 1.2Ω
Magnetron MG1 Filament winding < 1Ω
Filament winding - chassis ∞ Ω
Magnetron MG2 Filament winding < 1Ω
Filament winding - chassis ∞ Ω
WARNING: DISCONNECT THE PLUG WHEN MEASURING RESISTANCE.
TEST DATA AT A GLANCE
SCHEMATIC
NOTE: CONDITION OF OVEN
1. POWER SUPPLY CONNECTED AND/OR 1MINUTE
AFTER DOOR CLOSED OR COOK OFF.
2. : APPEAR ON DISPLAY.
NOTE: Indicates components with potential above 250 V.
Figure O-1 Oven Schematic-OFF Condition
F1 : WEAK POINT A017
BLU
NEUTRAL LIVE
GRN/YLW
BRN
NOISE FILTER
SW1: 
1ST LATCH SWITCH
(PRIMARY INTERLOCK SWITCH)
SW4: MONITOR SWITCH
R1: MONITOR RESISTOR 4.3Ω/20W
NOISE SUPPRESSION COIL
DISCHARGE RESISTOR 680 kΩ 1/2W
DISCHARGE RESISTOR 10 MΩ 1/2W
LINE CROSS CAPACITOR 0.22µF/ AC250V
LINE CROSS CAPACITOR 
10000 pF/ AC250V
LINE CROSS CAPACITOR 
10000 pF/ AC250V
A7
A5
TF3:BLOWER MORTOR  TEMP. FUSE 120C °
TF4:OVEN TEMP.   FUSE 120C °
F2: FUSE F6.3A
SW2: 2ND LATCH SWITCH
F4: FUSE M8A
A1
TF1: MAGNETRON (MG1)
 TEMP. FUSE 150 °C
TF2: 
MAGNETRON (MG2)
TEMP. FUSE 150°C
OVEN LAMP
BLOWER MOTOR
A3
CONTROL
UNIT
RY2 (R-22AM/23AM) RY3 (R-23AT)
RY4 (R-23AT) RY3 (R-22AM/23AM)
B1
SW3: 
3RD LATCH SWITCH
OVEN  THERMISTER (1)
OVEN  THERMISTER (2)
SW5: 
STOP 
SWITCH
TAB3
TAB2
TAB1 TAB4
T1: HIGH VOLTAGE TRANSFORMER
230V~50Hz
H. V. RECTIFIER
C1:H.V. CAPACITOR
 0.94 µF/ AC2300V
C2:H.V. CAPACITOR
 0.94 µF/ AC2300V
MG1: MAGNETRON
F3: FUSE M8A
SM
UPPER STIRRER MOTOR
LOWER STIRRER MOTOR
SM
BM
B2
B3
H1
H3
MAGNETRON THERMISTER
H. V. RECTIFIER
MG2: MAGNETRON
T2: HIGH VOLTAGE TRANSFORMER
L BLK
WHT
N
OL
RY1
EARTH
F5:
H.V.FUSE
0.6 A/ 5 kV (R-22AM)
0.75 A/ 5 kV

R- 23AT 

R-23AM
F6:
H.V.FUSE
0.6 A/ 5 kV (R-22AM)
0.75 A/ 5 kV

R- 23AT 

R-23AM

Sharp R-22AM Specifications

General

Brand	Sharp
Model	R-22AM
Category	Microwave Oven
Language	English