Sharp SJ-D48G-BE, SJ-D48G-GY, SJ-D48G-BL, SJ-51G-GY, SJ-51G-BL Service Manual

SERVICE MANUAL

S15A1SE55APRF

SHARP CORPORATION

SJ-48G-GY/BE/BL
SJ-D48G-GY/BE/BL
SJ-51G-GY/BE/BL
SJ-D51G-GY/BE/BL
SJ-55G-GY/BE/BL
SJ-D55G-GY/BE/BL

REFRIGERATOR-FREEZER

MODELS

TABLE OF CONTENTS

page

OUTLINE OF PRODUCT.......................................................................................................................................2

SPECIFICATIONS .................................................................................................................................................3

DESIGNATION OF VARIOUS PARTS ..................................................................................................................4

LIST OF ELECTRICAL PARTS ............................................................................................................................. 5

WIRING DIAGRAM................................................................................................................................................ 6

FUNCTIONS ..........................................................................................................................................................8

ASSEMBLING PROCEDURES OF MAIN PARTS AND CAUTIONS ..................................................................11

COOLING UNIT ...................................................................................................................................................17

REPLACEMENT PARTS LIST ............................................................................................................................18

Refrigerant; HFC-134a

Refer to "HFC-134a COOLING UNIT" Service Manual for handling this refrigerant.

DESTINATION ............................. F

In the interests of user-safety (Required by safety regulations in some
countries) the set should be restored to its original condition and only
parts identical to those specified should be used.

SJ-48G/D48G
SJ-51G/D51G
SJ-55G/D55G

1

SJ-48G/D48G

G type E type

Cooling Unit

Refrigerant CFC-12

Outer dimensions
(Height~ Width~ Depth)

Heat insulator

48G@ 1620~ 735~ 700(mm)
D48G (63.8"~ 28.9"~ 27.6")
51G@ 1700~ 735~ 700(mm)
D51G (66.9"~ 28.9"~ 27.6")
55G@ 1820~ 735~ 700(mm)
D55G (71.7"~ 28.9"~ 27.6")

42E@ 1620~ 715~ 690(mm)
D42E (63.8"~ 28.1"~ 27.2")
45E@ 1735~ 715~ 690(mm)
D45E (68.3"~ 28.1"~ 27.2")
50E@ 1825~ 715~ 690(mm)
D50E (71.9"~ 28.1"~ 27.2")

Rated storage volume

48G@ 443 liter(15.6cu.ft.)
D48G F:139(4.9) R:304(10.7)
51G@ 473 liter(16.7cu.ft.)
D51G F:139(4.9) R:334(11.8)
55G@ 521 liter(18.4cu.ft.)
D55G F:139(4.9) R:382(13.5)

42E@ 400 liter(14.2cu.ft.)
D42E F:98(3.5) R:302(10.7)
45E@ 430 liter(15.2cu.ft.)
D45E F:128(4.5) R:302(10.7)
50E@ 470 liter(16.6cu.ft.)
D50E F:162(5.7) R:308(10.9)

Specifications of interior

Fresh case 2
Chilled case

0

Three position
adjustable shelf

0

Conforms to the Regulations for Specific CFCs that will take effect in 1996.

HFC-134a

Polyurethane foam that uses
CFC-11

Polyurethane foam that uses
cyclopentane

0
1

1

SJ-51G/D51G
SJ-55G/D55G

OUTLINE OF PRODUCT

Comparison between Type G and Type E

2

SJ-48G/D48G
SJ-51G/D51G
SJ-55G/D55G

SPECIFICATIONS

Items SJ-48G SJ-D48G SJ-51G SJ-D51G SJ-55G SJ-D55G

Type 2-Door 2-Door 2-Door
Outer dimensions Height 1620mm(63.8") 1700mm(66.9") 1820mm(71.7")
(Including spacer) Width 735mm(28.9") 735mm(28.9") 735mm(28.9")

Depth 700mm(27.6") 700mm(27.6") 700mm(27.6")

Rated storage volume 443 liter(15.6 cu.ft) 473 liter(16.7 cu.ft) 521 liter(18.4 cu.ft)

F: 139 liter(4.9 cu.ft) F: 139 liter(4.9 cu.ft) F: 139 liter(4.9 cu.ft)
R: 304 liter(10.7 cu.ft) R: 334 liter(11.8 cu.ft) R: 382 liter

Defrosting System Heater system

Start Automatic

Finish Automatic
Temperature control Automatic (Adjustable)
No-frost freezer Yes
Interior lamp 1
Caster 4
Evaporating pan 1
Refrigerator Refrigerator shelf 1 2 3
Compartment Glass shelf 1

Fruit and Vegetable crisper

1
Egg pocket 1
Egg holder 2
Bottle pocket 1 2
Free pocket 1 2
Chilled case 1

Freezer Freezer shelf L 1
Compartment Freezer shelf S 1

Ice cube maker Twin ice cube maker
Ice cube box 1

Deodorizing system No Yes No Yes No Yes

SOURCE AND COMP. AND NET WEIGHT

Items SJ-48G-GY/BE/BL SJ-51G-GY/BE/BL SJ-55G-GY/BE/BL

SJ-D48G-GY/BE/BL SJ-D51G-GY/BE/BL SJ-D55G-GY/BE/BL

Rated voltage (V) 110
Rated frequency (Hz) 60
Climate class ST
Rated input of motor (W) 170 175 180
Rated input of defrosting heater (W) 137
Refrigerant (Charging quantity) HFC-134a(120g) HFC-134a(125g)
Net Weight (kg) 79 84 88
Power comsumption (kWh/month) 81 86 89
Energy factory (L/kWh/month) 6.8 6.7 7.0

COLOR

Items SJ-48G-GY, SJ-51G-GY, SJ-55G-GY SJ-48G-BE, SJ-51G-BE, SJ-55G-BE SJ-48G-BL, SJ-51G-BL, SJ-55G-BL

SJ-D48G-GY, SJ-D51G-GY, SJ-D55G-GY SJ-D48G-BE, SJ-D51G-BE, SJ-D55G-BE SJ-D48G-BL, SJ-D51G-BL, SJ-D55G-BL

Outside color Gray Beige Blue
Inside color White White White

(13.5 cu.ft)

3

SJ-48G/D48G

1
2
3

4
5

6
7

8

9
10
11
12
13

15

16
17

18
19

20
21

22

23

19

14

Upper hinge cover

Hot pipe

Freezer temp. control knob

Hot pipe

Evaporating pan cover

(Ventilating grille)

Evaporating pan

Adjustable feet

(Adjustable leg)

Fan motor

Propeller fan

Defrost thermostat
Evaporator
Defrost heater

Damper thermostat
Refrigerator temp. control knob
Drain pipe

Vegetable case
Compressor

Starting relay, Overload relay(Protector)

Caster

Sub condenser

Freezer
compartment

Refrigerator
compartment

Mark: Cold air flow

Timer

The figure shows SJ-51G.

SJ-51G/D51G
SJ-55G/D55G

DESIGNATION OF VARIOUS PARTS

Figure D-1. External Description

The names in parenthesis are the denominations
used in the REPLACEMENT PARTS LIST.

1. Freezer shelf (L) (Freezer tray L silk)

2. Freezer temp. control knob

3. Freezer shelf (S) (Freezer tray S silk)

4. Ice cube maker

5. Ice cube box (Ice storage box)

6. Chilled case

7. Light (Lamp)

8. Refrigerator temp. control knob

9. Refrigerator shelf(Ref. tray silk)

(SJ-48G/D48G type 1, SJ-51G/D51G type 2, SJ-55G/D55G type 3)

10. Three position adjustable shelf (Free set shelf)

11. Glass shelf

12. Fruit and Vegetable crisper (Vegetable case)

13. Evaporating pan & Cover

14. Caster

15. Adjustable feet (Adjustable leg)

16. Fan switch

17. Fan & light switch

18. Freezer pocket (F door pocket HS)

19. Magnetic door seal (Door packing)

20. Egg holder (Egg tray)

21. Egg pocket (Egg pocket HS)

22. Free pocket (Utility pocket)

(SJ-48G type 1, SJ-51G type 1, SJ-55G type 2)

23. Bottle pocket (Bottle pocket HS)

Figure D-2. Constructions

4

LIST OF ELECTRICAL PARTS

Aux. coil

Common

Main coil

Items SJ-48G, SJ-D48G, SJ-51G, SJ-D51G, SJ-55G, SJ-D55G
Source 110V 60Hz
Climate class ST
Thermostat Type: MM1-8025 ON: –17±5˚C OFF: –22±1.5˚C(at normal notch)
Damper thermostat Type: MM1-6129

Baffle opened 1.5˚C(at normal notch)
Baffle closed –3±1.5˚C

Timer Type: TMDFX04FB2, Integration type

Cycle 10hours 50 min., Working time about 4min. 20sec.

Fuse ass'y Thermo. fuse Type: SF70E 250V 10A Working temp. 70±2˚C

or MTG4A50072 250V 10A Working temp. 72±2˚C
Defrost thermostat Type: US602S 250V 8A OPEN 10±3˚C CLOSE 1±3˚C
Door switch 3 terminals push-button 250V 0.25A
Lamp socket 250V 1A E-12(HARD PLASTIC BODY TYPE)
Lamp 110V 10W E-12
Fan motor Type: MH15SXF-BJA7 100/110V 50/60Hz
Compressor Type: GL-90BK

60Hz(OIL COOLING)

Output 225W

Main coil 1.40Ω

Aux. coil 3.535Ω(at 20˚C)

SJ-48G/D48G
SJ-51G/D51G
SJ-55G/D55G

Terminal

Starting relay UH-3012 or UH-3002 4.7Ω 180V
Overload relay

(Protector)

4TM783NFBZZ-51 or 53 OFF 120˚C ON 61˚C
Running capacitor 20µF/180V
Defrost heater 115V 150W

5

SJ-48G/D48G

THERMOSTAT

TIMER

(R)

(G)

(Bk)

THERMO.
FUSE

OVERLOAD
RELAY

DEFROST
HEATER

STARTING
RELAY

(P)

(W)

INTERIOR
LIGHT

FAN
MOTOR

(S-B)

(O)

DOOR SWITCH

DEFROST
THERMOSTAT

(Bk)

C
M
A

N

2PIN
PLUG/
CORD

(B)

COMPRESSOR

L

FM

TM

(Br)

RUNNING CAPACITOR

CONNECTED IN TERMINAL BOX
CONNECTOR

G
Br
O
Y
R
P
B
Bk
S-B
W

: GRAY
: BROWN
: ORANGE
: YELLOW
: RED
: PINK
: BLUE
: BLACK
: SKY-BLUE
: WHITE

SJ-51G/D51G
SJ-55G/D55G

WIRING DIAGRAM

Be sure to replace the electrical parts with specified ones for maintaining the safety and performance of the set.
Because these are important for maintaining the safety of the set.

Figure W-1. Wiring Diagram

6

SJ-48G/D48G

Fan motor

C1(LR-09-1V)

Defrost thermo.

F-thermostat

Thermo fuse

Defrost heater

Door switch

FREEZER

REFRIGERATOR

(R-Cbox ass'y)

(C-Part. ass'y)

(E.V cover ass'y)

MACHINE ROOM

Defrost timer

Lamp

C2(ELR-02V)

C3(ELR-06V)

C4(LR-09-1V)

3(Push close)
4(Push open)

(O)

Source cord

Overload

relay

Terminal cover

Starting relay

Compressor

CE-2 CE-5 CE-2

(G)

G
Br
O
Y
R
P
B
Bk
S-B
G-Y

: GRAY
: BROWN
: ORANGE
: YELLOW
: RED
: PINK
: BLUE
: BLACK
: SKY-BLUE
: GREEN-YELLOW

1
2
3
4
5
6
7
8
9

1
2
3
4
5
6
7
8
9

1
2
3
4
5
6

1
2
3
4
5
6

1
2
3

121

2

1
2
3
4
5
6
7
8
9

1
2
3
4
5
6
7
8
9

FM

3
1
4

1

L

3
2
4
1

TM

C
M

A

1
L

N

E

(G)

(P)

(B)

(Br)

(R)

(Bk)

(W)

(W)

(Y)

(O)

(B)

(S-B)

(R)

(Bk)

(G)

(Y)
(S-B)

(P)
(Br)

Running capacitor

SJ-51G/D51G
SJ-55G/D55G

Figure W-2. Electric Accessories Layout

7

SJ-48G/D48G

MIN

MED

MAX

FREEZER TEMP. CONTROL

Coldest

MIN

MED

CHILLED
ZONE

REFRIGERATOR TEMP. CONTROL

Refrigerator
temperature

Chilled room
temperature

CHILLED

ZONE

(Coldest)

MED MIN

Approx.

0˚c

Approx.

-3˚c

Approx.

3˚c

Approx.

1˚c

Approx.

6˚c

Approx.

4˚c

The values shown above refer to the case where the
freezer temp. control knob is set at "MED".

SETTING OF
FREEZER TEMP.
CONTROL KNOB

Freezer
temperature

MAX

(Coldest)

MED MIN

Approx.

-21˚C

Approx.

-18˚C

Approx.

-15˚C

KNOB
SETTING

MAX

(Coldest)

MIN

PURPOSE

For making ice rapidly or fast freezing.

For storing frozen food for a short period (up to one month).
When frozen food or ice cream is not stored.

For normal freezing.

MED

When restocking with fresh food.

KNOB
SETTING

MED

CHILLED
ZONE
(Coldest)

MIN

PURPOSE

For keeping freshness of food longer.

For normal operation.
When the refrigerator provides excessive cooling.

When the refrigerator does not provide sufficient cooling.

SJ-51G/D51G
SJ-55G/D55G

1. ADJUSTABLE TEMPERATURE CONTROL
(1) Temperature control of freezer

Thermostat (freezer temperature sensing thermostat) operates on ON/OFF switchover to control the compressor
and allows the freezer temperature to keep at a suitable temperature.
However adjust the freezer temp. control knob as follows depending upon the storing condition of foods.

Figure F-1.

(2) Temperature control of refrigerator

Damper-thermostat senses temperature of the refrigerator and changes the opening angle of the damper
automatically.
However, as the Damper-thermostat has no function to switch on or off the compressor and cool air circulating
fan, the freezer temperature control causes temperature in the refrigerator to vary to some extent.
However, adjust the refrigerator temp. control knob as follows depending upon the cooling condition.

FUNCTIONS

Coldest

Figure F-2.

NOTE: The refrigerator temperature is affected also by the freezer temperature. If the freezer temp. control

knob is set at the position "MAX", the temperature tends to be lower than the following values, and if set
at near the position "MIN", temperature tends to be higher.
If the refrigerator is operated for a long time with the freezer temperature control sets the "MAX"
position, foods stored in the refrigerator compartment may also freeze.
When refrigerator temperature control sets to the "CHILLED ZONE", some foods stored may freeze.
In this case adjust control set back to the "MED" position.
When refrigerator temperature control sets to the "CHILLED ZONE", some foods stored in fresh cases
may also become frozen.

(3) Reference value of temperature

SETTING OF
REFRIGERATOR TEMP.
CONTROL KNOB

The values tables above refer to the measurement carried out center area and 1/3 of overall height from the bottom at each
of the refrigerator and the freezer after machine has been operated at an ambient temperature of 30˚C with no food stored
and the door closed until the temperature is stabilized.
The values vary depending upon frequency of opening and closing the door, ambient temperature, amount of stored foods
and manner of storing foods.

8

2. DEFROSTING

Operation Electric diagram Description

1. Cooling
(Normal)

2. Defrosting

(Time 20 to 30 min.)

3. Drain

(Time approx. 5 min.)

4. Cooling (start)

(Time approx. 5 min.)

The integration timer integrates running
time of the compressor. When it reaches
10 hours 50 min. at 50Hz, the timer contact
is changed to start defrosting.

When the defrost thermostat becomes
OFF, the timer motor at rest starts running.
During the operation time(4 min. 20 sec.
/50Hz) defrosted water is drained outside
the refrigerator.

Timer contact is changed to cooling operation
and the compressor starts running and
the timer motor stops.
Defrost thermostat contact becomes ON
when it's cooled. (FIgure F-3.)

Figure F-3.

Figure F-4 .

Figure F-5.

Figure F-6.

TM COMP

Defrost thermostat ON Compressor running

Timer motor running

Timer contact

Defrost
thermostat (ON)

Defrost heater

Thermo. fuse

Comp ressor

Time r motor

SOUR CE

TM COMP

Defrost thermostat OFF Compressor running

Timer motor stops

Thermostat Timer contact

Defrost
thermostat (OFF)

Defrost heater

Thermo. fuse

Comp ressor

Time r motor

SOUR CE

TM COMP

Defrost thermostat OFF Compressor stops

Timer motor running

Thermostat Timer contact

Defrost
thermostat (OFF)

Defrost heater

Thermo. fuse

Comp ressor

Time r motor

SOUR CE

TM COMP

Defrost thermostat ON Compressor stops

Timer motor stops

Thermostat Timer contact

Defrost
thermostat (ON)

Defrost heater

Thermo. fuse

Comp ressor

Time r motor

SOUR CE

Thermostat

The timer contact is changed to start
defrosting, the timer motor stops, and
power is supplied to the defrost heater.
It takes about 20 to 30 min. to defrost.
When little frosted the defrosting takes
little time.When much frosted, the
defrosting takes much time.

(1) No defrosting operation is necessary

No defrosting operation is necessary.
As this machine is so designed that a built-in
evaporator cools air and a fan circulates cooled air,
neither the freezer nor the refrigerator is frosted,
though the evaporator is frosted.

(2) Where is melted ice brought

1. Melted ice is brought into the evaporating pan at
the bottom of the set and is evaporated here by
the heat of sub condenser.

2. Be sure to use the evaporating pan as inserted
so as to be level with the outer case.

The frosted evaporator is defrosted automatically
due to the function of defrosting timer and heater,
requiring no defrosting operation.

(3) The following circuit diagrams in the table show automatic defrosting function of the refrigerator with

timer and defrost thermostat.

SJ-48G/D48G
SJ-51G/D51G
SJ-55G/D55G

9