DOWNLOAD Sharp R-872M (serv.man3) Service Manual ↓ Size: 393.96 KB | Pages: 21 in PDF or view online for FREE

Model
R-872M (serv.man3)
Pages
21
Size
393.96 KB
Type
PDF
Document
Service Manual
Brand
Device
Home Appliance / Microwave Oven / Part 2 Description of LSI, Schematic diagrams, PWB assemlbiesPage 18-38
File
r-872m-sm3.pdf
Date
PREV: Sharp R-872M (serv.man2) Service Manual

Sharp R-872M (serv.man3) Service Manual ▷ View online

R-872M - 34
Figure O-5(c) Oven Schematic-Dual cooking Condition (Microwave and Buttom Grill mode)
Figure O-5(b) Oven Schematic-Dual cooking Condition (Microwave and Top Grill mode)
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. COOKING TIME ENTERED.
3. DUAL KEY TOUCHED TWICE.
4. MICROWAVE POWER LEVEL ENTERED.
5. START KEY TOUCHED.
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. COOKING TIME ENTERED.
3. DUAL KEY TOUCHED THREE TIMES.
4. MICROWAVE POWER LEVEL ENTERED.
5. START KEY TOUCHED.
OL
CM
TTM
OVEN  LAMP
CONVECTION 
MOTOR
FAN MOTOR
TURNTABLE MOTOR
TOP GRILL HEATING ELEMENT 
BOTTOM HEATING ELEMENT
H.V. RECTIFIER
MAGNETRON
HIGH VOLTAGE 
TRANSFORMER
T/C TRANSFORMER
CAPACITOR
1.07 
µ
F
AC2100V
CONTROL UNIT
A9
A7
RY7
RY5
COM.
COM.
COM.
N.O.
N.O.
COM.
N.O.
N.O.
A3
E1
E3
E5
E7
A1
B2
C3
C1
A5
B1 
(SW2)STOP SWITCH
(SW1)MONITORED LATCH SWITCH
THERMISTOR
MG.
THERMAL
CUT-OUT
OVEN
THERMAL
CUT-OUT
(SW3)MONITOR 
SWITCH
4700p/ 250V
4700p/ 250V
10M/ 0.5W
NOISE SUPPRESSION COIL
680 k/ 0.5W
0.22
µ
/250V
FUSE15A
FUSE F8A
NOISE 
FILTER
L
N
230 - 240V ~ 50Hz
BRN/15
BLU/15
G-Y/15
EARTH
LIVE
NEUTRAL
NC.
NC.
 ASYMMETRIC
 RECTIFIER
RY6
RY1
RY2
RY3
RY4
FM
1
-
OL
CM
TTM
OVEN  LAMP
CONVECTION 
MOTOR
FAN MOTOR
TURNTABLE MOTOR
TOP GRILL HEATING ELEMENT 
BOTTOM HEATING ELEMENT
H.V. RECTIFIER
MAGNETRON
HIGH VOLTAGE 
TRANSFORMER
T/C TRANSFORMER
CAPACITOR
1.07 
µ
F
AC2100V
CONTROL UNIT
A9
A7
RY7
RY5
COM.
COM.
COM.
N.O.
N.O.
COM.
N.O.
N.O.
A3
E1
E3
E5
E7
A1
B2
C3
C1
A5
B1 
(SW2)STOP SWITCH
(SW1)MONITORED LATCH SWITCH
THERMISTOR
MG.
THERMAL
CUT-OUT
OVEN
THERMAL
CUT-OUT
(SW3)MONITOR 
SWITCH
4700p/ 250V
4700p/ 250V
10M/ 0.5W
NOISE SUPPRESSION COIL
680 k/ 0.5W
0.22
µ
/250V
FUSE 15A
FUSE F8A
NOISE 
FILTER
L
N
230 - 240V ~ 50Hz
BRN/15
BLU/15
G-Y/15
EARTH
LIVE
NEUTRAL
NC.
NC.
 ASYMMETRIC
 RECTIFIER
RY6
RY1
RY2
RY3
RY4
FM
1
-
  SCHEMATIC
R-872M - 35
Figure S-1. Pictrorial Diagram
BLU
WHT
BLK
WHT
OVEN THERMAL 
CUT-OUT
MG. THERMAL
 CUT-OUT
OVEN LAMP 
BLU
GRY
BLU
1
BRN
2
3
YLW
4
5
GRY
6
7
WHT
8
9
BLU
COM
GRY
WHT
BLU
GRY
GRY
GRY
N.C.
NC
COM
STOP 
SWITCH
NO
COM
TOP GRILL 
HEATING ELEMENT
BOTTOM 
HEATING 
ELEMENT
WHT
RED
WHT
BRN
BLU
GRN
GRN
GRN
BLU
TURNTABLE
MOTOR
T/C TRANSFORMER
MONITOR
SWITCH
MONITORED
LATCH 
SWITCH
YLW
ORG
BLU
WHT
BRN
BLK
RED
ORG
RED
BLK
BLU
ORG
BLK
BLU
WHT
CN-A
1
CN-B
2
RED
GRN
RED
WHT
GRY
ORG
BLK
NOISE FILTER
L
TP
F 8 A
TL
RED
15 A
WHT
N
ORG
ORG
WHT
1
BLU
2
3
BRN
4
5
ORG
6
7
RED
FAN 
MOTOR
CONVECTION
MOTOR
GRY
WHT
HIGH VOLTAGE COMPONENTS
G—Y
POWER SUPPLY
CORD
NEUTRAL
LIVE
EARTH
THERMISTOR
CN-B
1
1
12
3
2
1
SP1
RY2
RY4
RY3
CONTROL PANEL
CN-A
CN-E
RY5
RY7
1
1
7
9
CN-C
CN-E
WH-1
CN-1
IC-1
CN-G
RY1
RY6
2
3
1
BLK
BLK
CN-C
MAGNETRON
H.V.WIRE B
H.V.WIRE A
H.V. 
CAPACITOR
H.V.
RECTIFIER
ASYMMETRIC
RECTIFIER
 HIGH VOLTAGE
 TRANSFORMER
RED
BLU
RED
BLK
RED
BLK
BLK
WHT
 
 PICTURIAL DIAGRAM
R-872M - 36
Figure S-2. Power Unit Circuit
E 1
WH1-4
WH1-3
WH1-6
WH1-9
WH1-5
WH1-8
WH1-7
WH1-1
WH1-2
WH1-n
WH1-10
WH1-12
WH1-13
WH1-14
WH1-15
WH1-11
C 1
E 3
E 5
E 7
T1
AC230 - 240V
50Hz
FAN MOTOR
OVEN
THERMISTOR
GND
GND
R3 510 1w
R6 130 1w
Q2
2SB1238
Q3
KRC243M
R4 510 1w
D10
S1NB10
RY5
a
b
c
d
C1
VRS1
(J1)
(J2)
D5
RY6
D6
RY7
D7
RY1
D1
R2
1.5k
ZD2
HZ20-1
RY4
D4
RY3
D3
RY2
D2
10G471K
C3
C2 1000
µ
/35v
C5
10
µ
/35v
C4 10
µ
/35v
R5 3.3k
SP1
VC
BUZZER
VR
INT
POWER
CONTROL
STOP
SWITCH
NC
CONVECTION
MOTOR
BOTTOM
HEATING
ELEMENT
GRILL
HEATING
ELEMENT
HIGH VOLTAGE
TRANSFORMER
STOP
SWITCH
OVEN LAMP
TURNTABLE
MOTOR
DOOR OPEN
CONTACT 
A 1
A 3
A 5
A 7
A 9 
N O
N O
N O
N O
COM
COM
COM
COM
B 2
B 1
NOTE 1.
NOTE 2.
+
–
+
–
+
–
C 3
: IF NOT SPECIFIED, 1/4W 
±
 5% 
15P WIRE HARNESS 
: IF NOT SPECIFIED, 0.1
µ
F / 50V 
: IF NOT SPECIFIED, 1SS270A
  POWER UNIT CIRCUIT
R-872M - 37
Figure S-3. CPU Unit Circuit
+
–
CN1-3
CN1-10
CN1-5
CN1-6
CN1-9
CN1-11
CN1-8
CN1-7
CN1-15
CN1-13
CN1-12
CN1-1
CN1-14
CN1-2
CN1-4
G 8
G
 7
G
 6
G
 5
G
 4
G
 3
G
 2
G
 1
G12G
11G10
G 9
D5
D6
LD1
LD2
LD3
LD4
LD5
LD6
LD7
LD8
LD9
LD10
R4 22
R6 620
: IF NOT SPECIFIED, 1/10W 
±
 5%
: IF NOT SPECIFIED, 1SS355
: IF NOT SPECIFIED, 0.01
µ
F / 50V
R5 4.7k
R15 4.7k
C10 47
µ
/16v
C11 0.1
µ
/50v
C14
C12
0.1
µ
/50v
C21
0.1
µ
/50v
C13
0.1
µ
/50v
R10 1k
R12
15k
R13
15k
R14
15k
ZD10
UDZ4.3B
R11 4.7k
Q2
2SA1037AK
Q11
DTA143EKA
Q25
DTA143EKA
Q24
DTA143EKA
Q23
DTA143EKA
Q22
DTA123JKA
GND
VR
VC
INT
BUZZER
POWER
LIQUID CRYSTAL DISPLAY 
FAN
CONVECTION
FAN
BOTTOM
HEATING
ELEMENT
STOP SWITCH
OVEN LAMP
TURNTABLE
MOTOR
HIGH
VOLTAGE
TRANSFORMER
OVEN
THERMISTOR
NC
GRILL
HEATING
ELEMENT
Q21
DTA123JKA
Q20
DTA123JKA
R30 4.7k
R81 510F
 R82 28kF
R73 100k
R72 100k
R74 100k
R75 100k
C60
330p/50v
C61
330p/50v
C62
330p/50v
C63
330p/50v
R83 15k
C80
C30
R31 15k
D22
D23
D30
Q28
DTA143EKA
Q40
DTA143EKA
A
(J14) 4.7k
(J15) 4.7k
(J12) 4.7k
(J13) 4.7k
(J10)
(J11)
R68 15k
R55 4.7k
IC-1
IZA965DR
(J17)
(J16) 4.7k
R60 15k
R61 15k
R62 15k
R63 15k
R64 15k
R65 15k
R66 15k
R67 15k
R56
1M
A
CF1 4MHz
R69 15k
R70 15k
R71 15k
Q10
2SA1037AK
SEG10
C 1
VL1
AN7
AN6
AN5
5
10
15
20
25
55
60
65
70
75
51
1
80
30
AN4
AN3
AN2
AN1
AN0
P57
P56
P55
P54
P53
P52
P51
P50
P47
P46
P45
P44
INT0
P41
P40
P77
P76
P75
P72
P71
P70
RESET
35
45
85
90
95
50 
P81
P80
XIN
XOUT
VSS
P27
P26
P25
P24
P23
P22
P21
P20
P17
P16
P73
C 2
VL2
VL3
COM0
COM1
COM2
COM3
AVSS
VREF
SEG39
SEG38
SEG37
SEG36
SEG35
SEG34
SEG33
SEG32
SEG31
N C
N C
N C
N C
N C
N C
N C
COM3
COM2
COM1
N C
N C
SEG30
SEG29
SEG28
SEG27
SEG26
SEG25
SEG24
SEG23
SEG22
SEG21
SEG20
SEG19
SEG18
SEG17
SEG16
SEG15
SEG14
SEG13
SEG12
SEG11
SEG10
SEG9
SEG8
SEG7
SEG6
SEG5
SEG4
SEG3
SEG2
SEG1
VCC
SEG0
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
P74
INT1
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
SEG27
SEG28
SEG29
SEG30
SEG31
SEG32
SEG33
SEG34
SEG35
SEG36
SEG37
SEG38
SEG39
nfo
LBS
KG
OZ
PCS
%
˚C
COOK
SENSOR
DEFROST
AUTO
MINCED MEAT
BREAKFAST
FRESH VEG.
RICE/PASTA
BAKED POTATOES
PIZZA
MIXED GRILL
CAKE
OVEN CHIPS
FRESH FISH
CHICKEN PTNS
AUTO
DEFROST
STOP/
CLEAR
MICROWAVE
POWER LEVEL
DUAL
CONVECTION/
GRILL
AUTO
COOK
CONVECTION
( ˚
C )
START
AUTO MINUTE
LESS
Kg / Lb
Kg 
• Lb
TIMER
g 
• oz
GRILL
10 sec.
1 min.
10 min.
MORE
AUTO START
CLOCK
  CPU UNIT CIRCUIT
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