Service manual

R-204(W)
25
TEST DATA AT A GLANCE
PARTS SYMBOL VALUE / DATA
Fuse F1 M 8A 250V
Temperature fuse (OVEN) TF 120°C
Oven lamp OL 240–250 V 25W
High voltage capacitor C 0.91µF AC 2100V
Magnetron MG Filament < 1Ω / Filament – chassis ∞ ohm.
High voltage transformer T Filament winding < 1Ω
Secondary winding Approx. 185 Ω
Primary winding Approx. 2.4 Ω
WARNING: DISCONNECT THE PLUG WHEN MEASURING RESISTANCE.
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. MICROWAVE POWER LEVEL 800W.
3. TIMER ON.
Figure O-2 Oven Schematic-ON Condition
Figure O-1 Oven Schematic-OFF Condition
NOTE: " " indicates components with potential above 250V.
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. TIMER OFF.
HIGH VOLTAGE TRANSFORMER
T:
R:
MG: MAGNETRON
H.V. RECTIFIER
CAPACITOR 0.91µF
AC2100V
C:
TURNTABLE MOTOR
FAN MOTOR
OVEN LAMP
SW2: MONITOR SWITCH
CONTROL UNIT
2ND.
INTERLOCK
RELAY
2ND. INTERLOCK
RELAY CONTROL
SWITCH
1ST. INTERLOCK
SWITCH
B2A3
OL
FM
TTM
TF:
TEMPERATURE
FUSE 120˚C (OVEN)
N.O.
RY-1
COM.
A1
RY-2
MONITOR RESISTOR 0.8/20W
EARTH
230V
˜
50Hz
BLU
BRN
LIVENEUTRAL
G-Y
FUSE
M8A
N
L
LINE CROSS CAPACITOR
0.068µ/AC250V
NOISE SUPPRESSION COIL
LINE BYPASS CAPACITOR 0.0022µ/AC250V
LINE BYPASS CAPACITOR 0.0022µ/AC250V
NOISE FILTER UNIT
H.V. FUSE 0.6A
F2:
B1
F1:
SW1:
SW3:
HIGH VOLTAGE TRANSFORMER
T:
R:
MG: MAGNETRON
H.V. RECTIFIER
CAPACITOR 0.91µF
AC2100V
C:
TURNTABLE MOTOR
FAN MOTOR
OVEN LAMP
SW2: MONITOR SWITCH
CONTROL UNIT
2ND.
INTERLOCK
RELAY
2ND. INTERLOCK
RELAY CONTROL
SWITCH
1ST. INTERLOCK
SWITCH
B2A3
OL
FM
TTM
TF:
TEMPERATURE
FUSE 120˚C (OVEN)
N.O.
RY-1
COM.
A1
RY-2
MONITOR RESISTOR 0.8/20W
EARTH
230V
˜
50Hz
BLU
BRN
LIVENEUTRAL
G-Y
FUSE
M8A
N
L
LINE CROSS CAPACITOR
0.068µ/AC250V
NOISE SUPPRESSION COIL
LINE BYPASS CAPACITOR 0.0022µ/AC250V
LINE BYPASS CAPACITOR 0.0022µ/AC250V
NOISE FILTER UNIT
H.V. FUSE 0.6A
F2:
B1
F1:
SW1:
SW3: