DIY Series 46: Samsung Fridge Not Cooling

Symptoms:

• Samsung Fridge is not cooling (also no light when open the door)

Findings:

• When power OFF and ON again, compressor is not working
• There is no switching sound at the back of fridge after power ON

Photos:

1. Example for Samsung Fridge (Model: RT30MASS)
2. Circuit Block Diagram & location of Defrost Timer
3. Turn the Defrost Timer to RESET it, you will hear "tuck" sound

Tools required:

• Screwdriver

Costs involved:

• NIL

Note:

• In case of the Defrost Timer is still not working after reset, replace it with a new unit
• New Defrost Timer: US$3.50 ~ US$4.50

[Update] 2023-11-09

• After merely more than 1 week, the Defrost Timer is malfunction again.
• Hence, new part (TD-20C) is needed as replacement part.

Photos:

1. Look for the small box at the back of fridge, detach it from the fridge.
2. Open up the cover of the box.
3. Removed the broken Defrost Timer from its location.
4. Replacement done. Broken part was taken out.
5. Turn the Defrost Timer slightly to activate it, you will hear "tuck" sound.

DIY Series 45: Alpha EVO-i Fixing (Test/Reset & Heater)

Symptoms:

• Test and Reset Button for ELCB trip check is not working
• Heater LED is not ON, thus heater is not working

Findings:

• Test & Reset Board (Board Model: SW-G) is malfunction
• ELCB Board (Board Model: E2N) is malfunction

Photos:

1. Block Diagram of Alpha EVO-i Water Heater
2. Location of malfunction board (ELCB Board: E2N)
3. Location of malfunction board (Test & Reset Board: SW-G)
4. Faulty Push Button Switches of "Test" & "Reset"
5. Faulty Parts on ELCB Board (Electrolytic Cap 470uF, CBB21 1uF, Varistor 14D471K)

Video (After Fixing):

• 0:00:08: Testing on Test / Reset Button
• 0:00:13: Testing on Heater LED ON
• 0:00:23: Testing on Test / Reset Button
• 0:00:28: Testing on Heater LED OFF
• 0:00:40: Testing on water supply cut-off, Heater LED OFF
• 0:00:42: Testing on water supply resume, Heater LED ON

Tools required:

• Multimeter, screwdriver, plier and soldering iron

Costs involved:

• Push Button Switches (2pcs): US$0.05 x 2 = US$0.10
• Electrolytic Cap 470uF: US$0.10
• Varistor 14D471K: US$0.10
• CBB21 1uF (105J630V): US$0.35

Note:

• New ELCB Board (Model: E2N): US$18 ~ US$20
• New Alpha EVO-i Water Heater: US$100 ~ US$120

DIY Series 44: Mini Vespa (Toys Motorbike) Battery Replacement

Symptoms:

• Unable to power on even charging for long hours. Suspect battery is aging.

Findings:

• Battery is at low voltage level (below 3V)

Photos:

1. Example of Mini Vespa (toys motorbike)
2. Unscrew the screw on the battery compartment cover
3. Detached the battery from the battery terminals (+ & -)
4. Check the battery voltage level using multimeter
5. Get the battery info and source for replacement battery
6. Check the new battery voltage level before installing
7. Connect both battery terminals (+ & -) and sealed it using hot glue gun

Tools required:

• Multimeter, screwdriver, plier and hot glue gun

Costs involved:

• Rechargeable Sealed Lead Acid Battery (6V 4.5Ah): US$3 ~ US$5

DIY Series 43: Hitachi Washing Machine (SF-110LJ) Error Code C9

Symptoms:

• Old Hitachi Washing Machine (SF-110LJ) is having Error Code (C9)

Findings:

• Suspect Lid Lock / Door Lock is malfunction

Photos:

1. Location of lid lock / door lock mechanism
2. Error Code C9 was displayed on the screen
3. Unscrew top cover screw at left side
4. Another 3 screws (right side, and at the back)
5. Open up the top cover, unscrew 4 screws
6. Location of the lid lock / door lock
7. Detached the 4 cables attached to the lid lock / door lock
8. Unscrew 2 screws to remove the lid lock / door lock
9. Replacement Part: NTCY001CC3 (OEM Part)

Tools required:

• Screwdriver, plier

Costs involved:

• NTCY001CC3 (OEM Part) for Hitachi SF-110LJ: US$15