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R1900M
11 – 1
R1900M
Service Manual
CHAPTER 11.
CIRCUIT DIAGRAMS
[1] Oven Schematic
Figure O-1 Oven Schematic-OFF Condition
Figure O-2 Oven Schematic-Cooking Condition
SCHEMATIC
NOTE: CONDITION OF OVEN
1.DOOR CLOSED.
2. “ . ” APPEAR ON DISPLAY.
1.DOOR CLOSED.
2. “ . ” APPEAR ON DISPLAY.
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. MANUAL/ REPEAT PAD TOUCHED.
3. COOKING TIME PROGRAMMED.
4. STRAT PAD TOUCHED.
1. DOOR CLOSED.
2. MANUAL/ REPEAT PAD TOUCHED.
3. COOKING TIME PROGRAMMED.
4. STRAT PAD TOUCHED.
NOTE:
indicates components with potential above 250 V.
NEUTRAL
EAR
TH
N
FUSE F10 (1)
COOK
RELAY (1)
MAGNETRON
TEMP. FUSE (1)
MAGNETRON
THERMISTOR (1)
MAGNETRON
THERMISTOR (2)
HUMIDITY
SENSOR
ANT.
SENSOR (1)
3A FUSE
T1
RY1
RY4
D1
F1
F3
F4
H3
H2
H1
G7
G6
G4
G3
G2
G1
G5
F6
F8
F10
F26
F24
F22
F5
F7
F9
F11 F13 F15 F17 F19 F21 F23 F25
F12 F14 F18 F16 F20
D2
D3 D4
D5 D6
D7
D8 D9
D10 D11 D12 D13
A1
E1
A3
C3
C1
E2
OVEN
LAMP
ANTENNA MOT
O
R
(1)
ANTENNA MOT
O
R
(2)
ANT.
SENSOR (2)
MICROWAVE
SENSOR
SECONDARY INTERLOCK
SWITCH (2)
SECONDARY INTERLOCK
SWITCH (2)
EXHAUST
MOTOR
(DC24V)
POWER
TRANSFORMER (1)
H. V.
CAPACITOR (1)
CT1
H. V.
ASYMMETRIC
RECTIFIER (1)
H. V.
RECTIFIER (1)
MAGNETRON
(1)
POWER
TRANSFORMER (2)
H. V.
CAPACITOR (2)
CAPACITOR: 1.00uF
H. V.
ASYMMETRIC
RECTIFIER (2)
H. V.
RECTIFIER (2)
MAGNETRON
(2)
MONIT
OR
SWITCH
(2)
MONIT
OR
SWITCH
(1)
MAGNETRON
TEMP. FUSE (2)
COOK
RELAY (2)
FUSE F10 (2)
OVEN
TEMP.
FUSE
PRIMARY
INTERLOCK
RELAY
DOOR
SENSING
SWITCH
RELAY UNIT
CONTROL UNIT
EM
FF
FM
FM
OL
AM
AM
RY2
RY3
230V - 240V
50Hz
LIVE
L
BLU
GRN/YL
W
BRN
(WEAK
POINT)
(WEAK
POINT)
(WEAK
P
OINT)
(WEAK
P
OINT)
(WEAK
P
OINT)
SWITCHING
POWER
SUPPL
Y
UNIT
Noise
Filter
FAN MOTOR
(DC24V)
EXHAUST FAN
(DC24V)
FA
F
FA
F
NEUTRAL
N
FUSE F10 (1)
COOK
RELAY (1)
MAGNETRON
TEMP. FUSE (1)
MAGNETRON
THERMISTOR (1)
MAGNETRON
THERMISTOR (2)
HUMIDITY
SENSOR
ANT.
SENSOR (1)
3A FUSE
T1
RY1
RY4
D1
F1
F3
F4
H3
H2
H1
G7
G6
G4
G3
G2
G1
G5
F6
F8
F10
F26
F24
F22
F5
F7
F9
F11 F13 F15 F17 F19 F21 F23 F25
F12 F14 F18 F16 F20
D2
D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13
A1
E1
A3
C3
C1
E2
OVEN
LAMP
ANTENNA MOT
O
R
(1)
ANTENNA MOT
O
R
(2)
ANT.
SENSOR (2)
MICROWAVE
SENSOR
SECONDARY INTERLOCK
SWITCH (2)
SECONDARY INTERLOCK
SWITCH (2)
EXHAUST
MOTOR
(DC24V)
POWER
TRANSFORMER (1)
H. V.
CAPACITOR (1)
CT1
H. V.
ASYMMETRIC
RECTIFIER (1)
H. V.
RECTIFIER (1)
MAGNETRON
(1)
POWER
TRANSFORMER (2)
H. V.
CAPACITOR (2)
CAPACITOR: 1.00uF
H. V.
ASYMMETRIC
RECTIFIER (2)
H. V.
RECTIFIER (2)
MAGNETRON
(2)
MONIT
OR
SWITCH
(2)
MONIT
OR
SWITCH
(1)
MAGNETRON
TEMP. FUSE (2)
COOK
RELAY (2)
FUSE F10 (2)
OVEN
TEMP.
FUSE
PRIMARY
INTERLOCK
RELAY
DOOR
SENSING
SWITCH
RELAY UNIT
CONTROL UNIT
EM
FF
FM
FM
OL
AM
AM
RY2
RY3
230V - 240V
50Hz
LIVE
L
BLU
GRN/YL
W
BRN
(WEAK
POINT)
(WEAK
P
OINT)
(WEAK
POINT)
(WEAK
POINT)
(WEAK
POINT)
SWITCHING
POWER
SUPPL
Y
UNIT
Noise
Filter
FAN MOTOR
(DC24V)
EXHAUST FAN
(DC24V)
EAR
TH
FA
F
FA
F
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