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Sharp Sja20S Page 32

Workshop Manuals
9 – 1
SJ26NSL
Service Manual
CHAPTER 9. COOLING UNIT
[1] COOLING UNIT
NOTE: The iron pipe is partly used of this refrigerator. Please note the following points when brazing the iron pipe.
• Brazing material should be silver brazing rod. (To be equivalent with BAg-20 or BAg-7)
• Flux should be FB3A type. (It should be non-chlorine type).
• Place an iron plate or cloth on the base frame to prevent the flux fall.
• Remove the paint and plating on the pipe by the sandpaper before start repairing.
• If you cut the iron pipe for repairing, remove the plating on the iron pipe end (20mm) by the sandpaper.
• Put the flux on silver brazing rod and dry the flux by the flame of the torch, and then start brazing.
• Remove the flux completely by the wire brush , and wipe off by the cloth after brazing.
• Leakage inspection should be done when compressor is running.
• After removing flux, paint the black enamel paint on the brazing part.
* Copper back condenser is used in some models.Before repairing,check the Back condenser is copper or iron.
Hot pipe L
(Side condenser)
Hot pipe
(DP-condenser)
Hot pipe R
(Side condenser)
Evaporator
Suction pipe
Compressor
Capillary tube
Dryer
Back condenser
S.P connector
Discharge P connector
Dryer connector
Mark: Brazing portion
Mark: Refrigerant flow
Iron pipe
Copper pipe
!"#$% &'$( &#$) &'$* &#$+ &'$, &#-( &#-)
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Contents Summary of Sharp Sja20S

  • Page 1SJ-A20S/B21S/A24S/B25S/A28A/B27S/A31S/A34S-SL SERVICE MANUAL No.S9902SJ22FTVTT Refrigerator-freezer MODELS SJ-A20S-SL Ag SJ-B21S-SL SJ-F230G SJ-F230G SJ-A24S-SL SJ-F230G SJ-B25S-SL SJ-A28S-SL SJ-B27S-SL SJ-A31S-SL SJ-A34S-SL SJ-A28S-SL SJ-B27S-SL DESTINATION T Refrigerant; HFC-134a Refer to "HFC-134
  • Page 2!"#$% &'$( &#$) &'$* &#$+ &'$, &#-( &#-) SJD34NSLG CHAPTER 1. SPECIFICATION Service Manual SJ-A20S/B21S/A24S/B25S/A28S/B27S SJ-A20S SJ-A24S SJ-A28S Items SJ-B21S SJ-B25S SJ-B27S Type 2-Door Outer dimensions Height 1253mm(49.3") 1389mm(54.7") 1491mm(58.7") Width 545mm(21.5") 545mm(21.5") 545mm(21.5")
  • Page 3!"#$% &'$( &#$) &'$* &#$+ &'$, &#-( &#-) SJD34NSLG SJ-A31S/A34S Service Manual Items SJ-A31S SJ-A34S Type 2-Door Outer dimensions Height 1580mm(62.2") 1700mm(66.9") Width 600mm(23.6") 600mm(23.6") Depth 631mm(24.8") 631mm(24.8") Rated storage volume (Rated volume) 292liter(10.3cu.ft) 313liter(11.1cu
  • Page 4!"#$% &'$( &#$) &'$* &#$+ &'$, &#-( &#-) SJ26NSL CHAPTER 2. DESIGNATION OFVARIOUS Service PARTSManual [1] EXTERNAL DESCRIPTION The names in parenthesis "[ ]" are the denominations used in the REPLACEMENT PARTS LIST. 1. Freezer shelf [F-shelf] 1 2. Freezer temp.control knob 12 3. Ice cube maker 2 4.
  • Page 5!"#$% &'$( &#$) &'$* &#$+ &'$, &#-( &#-) [2] CONSTRUCTIONS Mark: Cold air flow F-temp. control knob Fan motor Def-thermistor Evaporator Fuse ass'y Defrost heater R-temp. control knob Deodorizing unit R-thermistor PWB L ass'y Lamp Running capacitor Evaporating pan Compressor Starting relay Protector
  • Page 6!"#$% &'$( &#$) &'$* &#$+ &'$, &#-( &#-) SJD26LVSL CHAPTER 3. DIMENTIONS [1] OUTER DIMENTIONS AND CLEARANCE 1. SJ-A20S/B21S 60 628.5 60 60 545 610 545 443.5 9 365 1253 1085 1145 757.5 34 4 970 (Unit:mm) 2. SJ-A24S/B25S 60 628.5 60 60 545 545 610 443.5 9 365 1389 1085 1145 893.5 34 4 970 (Unit:mm) 3–
  • Page 7!"#$% &'$( &#$) &'$* &#$+ &'$, &#-( &#-) 3. SJ-A28S/B27S 60 628.5 60 60 545 610 545 515.5 9 365 1491 1085 1145 923.5 34 4 970 (Unit:mm) 4. SJ-A31S 649.5 600 631 600 541.5 9 405 1580 1161 1221 986.5 34 4 1065 3–2
  • Page 8!"#$% &'$( &#$) &'$* &#$+ &'$, &#-( &#-) 5. SJ-A34S 649.5 600 631 600 541.5 9 405 1700 1161 1221 1106.5 34 4 1065 [2] INNER DIMENTIONS 1. SJ-A20S/B21S 391 196 38 366 55 33 138 66 380 204 67 154 107 390 103 340 45 143 250 146 417 43 292 321 371 120 300 149 417 107 211 208 366 253 208 80 137 363 67 (U
  • Page 9!"#$% &'$( &#$) &'$* &#$+ &'$, &#-( &#-) 2. SJ-A24S/B25S 391 196 38 366 55 33 66 138 204 380 154 67 107 103 340 390 45 143 250 180 169 214 91 187 43 68 30 292 417 417 292 86 434 371 271 120 154 107 417 211 366 253 208 208 80 363 137 67 (Unit:mm) 3. SJ-A28S/B27S 366 66 391 67 196 38 366 204 202 55 33
  • Page 10!"#$% &'$( &#$) &'$* &#$+ &'$, &#-( &#-) 4. SJ-A31S 416 66 430 67 217 38 416 231 204 55 33 66 138 254 67 154 107 111 445 45 92 180 380 237 217 91 147 68 30 312 472 43 472 312 170 530 330 430 120 210 107 231 472 430 259 217 217 80 411 152 67 5. SJ-A34S 416 66 430 67 217 38 416 231 204 55 33 66 138 25
  • Page 11!"#$% &'$( &#$) &'$* &#$+ &'$, &#-( &#-) SJ26NSL CHAPTER 4. LIST OF ELECTRICAL PARTS ITEMS TYPE NAME RATING SPECIFICATIONS R Thermistor ― DC 5V R0 = 6.4 kΩ, B(0) = 3811 Defrost Thermistor ― DC 5V R0 = 6.4 kΩ, B(0) = 3811 Thermo. fuse SF70E 250V 10A Working temp. : 70 °C Defrost heater ― 220 - 240V 3
  • Page 12!"#$% &'$( &#$) &'$* &#$+ &'$, &#-( &#-) SJD26LVSL CHAPTER 5. WIRING DIAGRAM [1] WIRING DIAGRAM Be sure to replace the electrical parts with specified ones for maintaining the safety and performance of the set. COMPRESSOR STARTING RELAY (BL) RUNNING CAPACITOR 5–1
  • Page 13!"#$% &'$( &#$) &'$* &#$+ &'$, &#-( &#-) [2] ELECTRIC ACCESSORIES LAYOUT F-LOUVER ASS’Y CABINET FAN MOTOR FM LEAD EV COVER HARNESS FL ASS’Y FUSE DEF-THERMISTOR DEF-HEATER R-CBOX-K PWB LAMP R-THERMISTOR DOOR SWITCH TERMINAL COVER PROTECTOR COMPRESSOR RUN CAP. RELAY WIRE ASS’Y STARTING RELAY (BOTTOM A
  • Page 14!"#$% &'$( &#$) &'$* &#$+ &'$, &#-( &#-) [ ] PRECAUTIONS FOR USING LEAD-FREE SOLDER 1. Employing lead-free solder The PWB of this model employs lead-free solder. This is indicated by the "LF" symbol printed on the PWB and in the service manual. The suffix letter indicates the alloy type of the solde
  • Page 15!"#$% &'$( &#$) &'$* &#$+ &'$, &#-( &#-) SJ431NSL CHAPTER 6. FAILURE DIAGNOSIS Service Manual [1] OUTLINE OF CONTROL 1. ON/OFF Control of Compressor When the plug of refrigerator is connected, the compressor will start automatically and run for approximately 5 minutes. After then, ON/OFF of the comp
  • Page 16!"#$% &'$( &#$) &'$* &#$+ &'$, &#-( &#-) [3] RE-SETTING OF MICROCOMPUTER AT POWER FAILURE • At the power failure for over 0.1 second, the control of the microcomputer will be reset. When the power is re-supplied, the temperature of R-thermistor will be detected again and ON/OFF of the compressor wil
  • Page 17!"#$% &'$( &#$) &'$* &#$+ &'$, &#-( &#-) [5] CONVERSION TABLE Conversion Table between R-thermistor and Def-thermistor Temperature and Resistance Value Temperature Resistance Value Temperature Resistance Value Temperature Resistance Value (°C) (kΩ) (°C) (kΩ) (°C) (kΩ) -25 26.1 -11 11.49 3 5.5 -24 24
  • Page 18!"#$% &'$( &#$) &'$* &#$+ &'$, &#-( &#-) [6] CIRCUIT DIAGRAM OF MAIN PWB 6–4
  • Page 19!"#$% &'$( &#$) &'$* &#$+ &'$, &#-( &#-) SJD26LVSL CHAPTER 7. FUNCTIONS [1] ADJUSTABLE TEMPERATURE CONTROL 1. Temperature control 1) FREEZER COMPARTMENT The FREEZER TEMP. CONTROL regulates the quantity of cold air to the freezer. "MAX" setting directs more cold air to the freezer compartment. (makin
  • Page 20!"#$% &'$( &#$) &'$* &#$+ &'$, &#-( &#-) 3. Temp. control system Freezer Temp. Control Knob The FREEZER TEMP. CONTROL regulates the quantity of cold air to the freezer. MAX setting directs more cold air to the freezer compartment. (making the freezer compartment colder) Fan MIN setting directs less
  • Page 21!"#$% &'$( &#$) &'$* &#$+ &'$, &#-( &#-) SJD26LVSL CHAPTER 8. ASSEMBLING PROCEDURES OF MAIN PARTS AND CAUTIONS CAUTION: DISCONNECT THE UNIT FROM THE POWER SUPPLY BEFORE ANY REPAIRING. [1] F-LOUVER ASS'Y (SJ-A20S/B21S/A24S/B25S/A28S/B27S) 1. Fan motor ass'y Propeller fan 90 Fan motor holder a Fan cla
  • Page 22!"#$% &'$( &#$) &'$* &#$+ &'$, &#-( &#-) 2. EV-cover ass'y 1. Bind Fuse ass'y with L-band c. Then wind glass cloth tape (W25 x L50mm ) to lead wire of Fuse ass'y (Figure A-5). L-band c Fuse ass’y Glass cloth tape W25xL50 Figure A-5 2. Stick EVC-sealer a to square hole of EV-cover. 3. Set Fan motor a
  • Page 23!"#$% &'$( &#$) &'$* &#$+ &'$, &#-( &#-) 3. F - louver ass'y 1. Set F-louver to front side of EV-cover with double face tape (W15xL45mm.). 2. Insert F-control knob to F-louver. Then set to front side of EV-cover. 3. Stick EVC-sealer c to bottom of F-louver ass'y. Lead EV-cover more than 3.5mm. more
  • Page 24!"#$% &'$( &#$) &'$* &#$+ &'$, &#-( &#-) [2] F-LOUVER ASS'Y (SJ-A31S/A34S) 1. Fan motor ass'y Fan motor holder b Tapping screw Motor cushion Motor cushion Fan motor U-sealer handle Fan motor holder a Tapping screw Slit area Fan clamp U-sealer handle Lead EV-cover BROWN RED Propeller fan 100 Figure A
  • Page 25!"#$% &'$( &#$) &'$* &#$+ &'$, &#-( &#-) 2. EV-cover ass'y 1. Bind Fuse ass'y with L-band c. Then wind glass cloth tape (W25 x L50mm ) to lead wire of Fuse ass'y (Figure A-5). L-band c Fuse ass’y Glass cloth tape W25xL50 Figure A-5 2. Stick EVC-sealer a to square hole of EV-cover. 3. Set Fan motor a
  • Page 26!"#$% &'$( &#$) &'$* &#$+ &'$, &#-( &#-) 3. F - louver ass'y 1. Set F-louver to front side of EV-cover with double face tape (W15xL45mm.). 2. Insert F-control knob to F-louver. Then set to front side of EV-cover. 3. Stick EVC-sealer c to bottom of F-louver ass'y. Lead EV-cover more than 3.5mm. more
  • Page 27!"#$% &'$( &#$) &'$* &#$+ &'$, &#-( &#-) [3] R CONTROL COV. ASS'Y R-Control knob R-C Box cover Control label Lamp Figure A-10 1. Insert Lead R-Thermistor to Lead R-C Box. 2. Inset Lead R-C box to PWB L ass'y. 3. Assemble the PWB L ass’y with PWB holder A and then assemble the PWB holder A with PWB h
  • Page 28!"#$% &'$( &#$) &'$* &#$+ &'$, &#-( &#-) 5. Assemble Lamp with R-C Box cover then fix with 2 tapping screw. 6. Stick Knob sealer on R-C Box cover and then insert Knob joint to R-C Box cover. 7. Assemble the PWB ass'y with R-C Box cover. And place the R-Thermistor on the groove of R-C Box cover. 8. I
  • Page 29!"#$% &'$( &#$) &'$* &#$+ &'$, &#-( &#-) [4] HOW TO REPLACE THE LAMP 1. Remove the Light cover. 2. Remove the 2 screw, and pull the Lamp out. Screw 3. Insert the new Lamp to the connector, and fix with 2 screws. 4. Set the Light cover. 8–9
  • Page 30!"#$% &'$( &#$) &'$* &#$+ &'$, &#-( &#-) [5] DEFROST HEATER 2. Replacement of Def. heater. 1. Remove the aluminium tape on Heater support to take it off from 1. Taking-out Evaporator the food liner. 1. Take-out Fan louver ass’y. 2. Raise the protrusion part of Heater support. Then remove Heater 2. T
  • Page 31!"#$% &'$( &#$) &'$* &#$+ &'$, &#-( &#-) 4. Replace Def. heater ass’y with new one. 3. Installing of Evaporator 1. Install Evaporator as shown in Figure.A-15 in the reverse order of Heater cover Figure.A-16. 2. Correct the deformed fin. NOTE: 1.When installing Evaporator, take care not to deform sig
  • Page 32!"#$% &'$( &#$) &'$* &#$+ &'$, &#-( &#-) SJ26NSL CHAPTER 9. COOLING UNIT Service Manual [1] COOLING UNIT NOTE: The iron pipe is partly used of this refrigerator. Please note the following points when brazing the iron pipe. • Brazing material should be silver brazing rod. (To be equivalent with BAg-2
  • Page 33!"#$% &'$( &#$) &'$* &#$+ &'$, &#-( &#-) [2] LOCATION 1. Location 1 Capillary tube Dryer Dryer connector Hot pipe Charge pipe Evaporator Charge pipe L Back condenser * Suction pipe S.P Discharge connector P connector Compressor Mark shows Cu brazing points Mark shows Ag brazing points 2. Location 2