R-254M (serv.man3). Part 2 Block, Schematic PWB Assembly diagrams (26-30) - Sharp Home Appliance Service Manual (repair manual)

Model: R-254M (serv.man3)
Pages: 5 Few pages! See other manuals at the bottom of the first or last page.
Size: 134.64 KB
Type: PDF
Document: Service Manual
Brand: Sharp
Device: Home Appliance / Microwave Oven / Part 2 Block, Schematic PWB Assembly diagrams (26-30)
File: r-254m-sm3.pdf
Date: 2018-11-20

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Read Sharp R-254M (serv.man3) Service Manual online

R-254M - 26
NOTE: " " indicates components with potential above 250V.
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. CLOCK OR "  :  " APPEARS ON DISPLAY.
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. MICROWAVE POWER LEVEL HIGH.
3. COOKING TIME ENTERED.
4. START PAD TOUCHED.
Figure O-2 Oven Schematic-ON Condition
Figure O-1 Oven Schematic-OFF Condition
  SCHEMATIC DIAGRAMS
FAN MOTOR
*
POWER TRANSFSORMER WITH 150 C
RY3
RY1
COM.
NO.
NO.
COM.
A3
A1
CONTROL UNIT
STOP
SWITCH
B2
B1
G-Y/18
/18
/18
L
N
BRN
BLU
EARTH
NOISE FILTER
UNIT
FM
TT
M
 
230-240V    50Hz
THERMOSTAT IN PRIMARY WINDING
*
CAPACITOR
0.88  F
*
H.V.
RECTIFIER
THERMAL
CUT-OUT
OVEN
125 C
F1
*
MAGNETRON
NO
COM
NC
NOISE SUPPRESSION COIL
2100VAC
TURNTABLE
MOTOR
680k   /0.5W
0.0033  F/250V
0.22  F/250V
10M   /0.5W
0.0033  F/250V
OL
LIGHT
OVEN
NO
COM
SWITCH
MONITOR
MONITORED
LATCH
SWITCH
SW3
SW1
SW2
FAN MOTOR
*
POWER TRANSFSORMER WITH 150 C
RY3
RY1
COM.
NO.
NO.
COM.
A3
A1
CONTROL UNIT
STOP
SWITCH
B2
B1
G-Y/18
/18
/18
L
N
BRN
BLU
EARTH
NOISE FILTER
UNIT
FM
TT
M
 
230-240V  50Hz
THERMOSTAT IN PRIMARY WINDING
*
CAPACITOR
0.88  F
*
H.V.
RECTIFIER
THERMAL
CUT-OUT
OVEN
125 C
F1
*
MAGNETRON
NO
COM
NC
NOISE SUPPRESSION COIL
2100VAC
TURNTABLE
MOTOR
680k  /0.5W
0.0033  F/250V
0.22  F/250V
10M  /0.5W
0.0033  F/250V
OL
LIGHT
OVEN
NO
COM
SWITCH
MONITOR
MONITORED
LATCH
SWITCH
SW3
SW1
SW2

R-254M - 27
Figure S-1. Pictrorial Diagram
HIGH VOLTAGE COMPONENTS
MONITORED 
LATCH SWITCH
MONITOR 
SWITCH
TURNTABLE
MOTOR
COM.
COM.
BLK
N
L
WHT
RED
WHT
BLK
N.C.
STOP SWITCH
WHT
RED
RED
WHT
WHT
RED
GRN
WHT
RED
G/Y
BLK
RED
BLK
BLU
BRN
RED
RED
THERMAL CUT-OUT
(OVEN)
OVEN 
LAMP
BLK
BLK
BLK
BLK
RED
WHT
CN-A
CN-B
2
BLK
1
3
WHT
WHT
WHT
WHT
WHT
GRN
GRN
RED
GRN
2
1
N.O.
COM.
N.O.
FAN MOTOR
NOISE FILTER
H.V.WIRE B
MAGNETRON
H.V. 
CAPACITOR
H.V.
RECTIFIER
HIGH VOLTAGE
TRANSFORMER
POWER SUPPLY CORD
LIVE
NEUTRAL
WHT
BLK
WHT
RY3
RY1
CN-A
T1
3
1
2
1
CONTROL UNIT
IC1
CN-B
CN-G
CN-C
CN-C
  PICTORIAL DIAGRAM

R-254M - 28
Figure S-2. Power Unit Circuit
  POWER UNIT CIRCUIT DIAGRAM
+
–
B 1
C 1
C 2
C 3
C 4
C 6
C 7
C 5
C 8
C 9
C10
C11
C12
C13
B 2
A 1
A 3
NO
COM
NO
COM
STOP
SWITCH
STOP
SWITCH
NC
GND
VC
BUZZER
VR
INT
CN-C
13 WIRE HARNESS
AC230-240V
50Hz
OVEN LAMP
TURNTABLE
MOTOR
FAN MOTOR
HIGH
VOLTAGE
TRANSFORMER
R3
130 1w
D1
S1NB10
R1 430 2w
R2 470 1w
T1
1
6
3
4
GND
a
b
c
d
VRS1
C1 470
µ
/50v
SP1
(J1)
10G471K
RY1
RY3
CN-B
CN-A

R-254M - 29
Figure S-3. Control Panel Circuit
   CONTROL PANEL CIRCUIT DIAGRAM
+
–
+
–
C 4
GND
C 3
GND
VC
INT
VR
BUZZER
BUZZER
NC
OVEN LAMP
TURNTABLE
MOTOR
FAN MOTOR 
HIGH
VOLTAGE
TRANSFORMER 
STOP
SWITCH
C 7
C 9
C 8
C 5
C 6
C13
C10
C11
C12
C 1
C 2
G 9
G10
G11
G12
G 1
41
64
1
24
IC1
IXA083DR
LIQUID CRYSTAL DISPLAY
80
65
25
40
G 2
G 3
G 4
G 5
G 6
G 7
G 8
S12
S11
S10
S 9
S 8
S 7
S 6
S 5
S 4
S 3
S 2
S 1
C 3
C 2
C 1
SEG10
SEG11
P34
P35
P36
P37
P00
P01
P02
P03
P04
P05
P06
P07
P10
P11
P12
P13
P14
P15
P16
P17
SEG9
SEG8
VL2
VL1
AN7
AN6
AN5
5
10
15
20
45
50
55
60
30
35
70
75
AN4
P63
P62
AN1
P60
P57
P56
P55
CNTR0
VL3
COM0
COM1
COM2
P41
P40
RESET
P71
C1 0.1
µ
/50v
C2 0.1
µ
/50v
C4
R1 4.7k
R40 4.7k
R67 15k
R66 15k
R65 15k
R64 15k
R63 15k
R62 15k
R61 15k
R60 15k
R77 100k
R76 100k
R75 100k
R74 100k
R2 27
R3 4.7k
Q1
DTA143EKA
0.1
µ
/50v
C5
0.01
µ
/50v
C3 47
µ
/16v
C40
0.01
µ
/50v
P70
XIN
XOUT
VSS
P27
P26
P25
P24
P23
P22
P21
P20
COM3
AVSS
VREF
VCC
SEG0
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
P53
P52
P51
P50
P47
P46
P45
P44
P43
INT0
D1-D2 1SS355
D1
D2
R4 1k
R5 15k
R6 15k
R7 15k
R30 3.3k
R21 1.5k
R41 15k
(J11) 4.7k
(J13) 4.7k
(J15) 4.7k
(J17) 4.7k
(J10)
(J12)
(J14)
(J16)
R90 4.7k
R91
1M
R68 15k
R69 15k
R70 15k
R71 15k
RR 200
D22
1SS355
ZD20
UDZ22B
D20
DAP202U
NOTE
: IF NOT SPECIFIED,  1/10W 
±
 5%
D21
1SS355
BACK LIGHT
LD1-LD5
Q30
DTA143EKA
Q2
2SA1037AK
Q3
2SA1037AK
Q20
DTA143EKA
Q21
DTD143EK
Q22
DTA123JKA
Q24
2SA1037AK
LD1
LD2
LD3
LD4
LD5
R8 15k
C6 0.01
µ
/50v
330pF/50v
C63
330pF/50v
C62
330pF/50v
C61
330pF/50v
C60
C20
0.1
µ
/50v
CF1
CST4.00MGW
C21
10
µ
/35v
C7 0.01
µ
/50v
ZD1
UDZ4.3B
CPU UNIT 
KEY UNIT
ROAST BEEF / LAMB
WHOLE POULTRY
CHICKEN QUARTERS
ROAST PORK
PASTA DISH
RISOTTO
MEAT JOINT
ROAST POULTRY
DOWN
LESS
MORE
UP
KITCHEN
TIMER
CLEAR
AUTO MINUTE
STOP
START
DELAY START
CLOCK SET
KG / LB
CONVERSION
AUTO
COOK
POWER
LEVEL
CASSEROLE

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Download Sharp R-254M (serv.man3) Service Manual (Repair Manual)

Here you can read online and download Sharp R-254M (serv.man3) Service Manual in PDF. R-254M (serv.man3) service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sharp R-254M (serv.man3) Microwave Oven. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.

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