SNES Capacitors and Voltage Regulator Replacement
About 1 min
SNES Capacitors and Voltage Regulator Replacement
It is farily straight forward to replace the capacitors and voltage regulator if you have the right tools.
Tools needed
- Hakko de-soldering gun (FR-301)
- Solder
Parts you need to replace and the location on SNES jr.
| Capacitor Location | uF | V |
|---|---|---|
| C60 | 220 uF | 6.3 |
| C59 | 10 uF | 16 |
| C58 | 10 uF | 16 |
| C17 | 33 uF | 50 |
| C16 | 33 uF | 50 |
| C15 | 47 uF | 16 |
| C14 | 33 uF | 50 |
| C9 | 2.2 uF | 50 |
| Voltage Regulator (2A) | L78S05CV |
Cap Kit/Regulator Cost - $4.87 (Feb 19, 2022 digi-key.ca)
| Description | Part Number | Manufacturer Name | Qty | Unit Price | Price |
|---|---|---|---|---|---|
| CAP ALUM 220UF 20% 6.3V RADIAL | 6.3ZLH220MEFCTA5X11 | Rubycon | 1 | 0.37000 | $0.37 |
| CAP ALUM 10UF 20% 16V RADIAL | 16TWL10MEFC5X11 | Rubycon | 2 | 0.42000 | $0.84 |
| CAP ALUM 33UF 20% 50V RADIAL | 50YXJ33M5X11 | Rubycon | 3 | 0.47000 | $1.41 |
| CAP ALUM 2.2UF 20% 50V RADIAL | 50YXJ2R2MTA5X11 | Rubycon | 1 | 0.42000 | $0.42 |
| CAP ALUM 47UF 20% 16V RADIAL | 16YXF47MEFC5X11 | Rubycon | 1 | 0.34000 | $0.34 |
| IC REG LINEAR 5V 2A TO220AB | L78S05CV | STMicroelectronics | 1 | 1.49000 | $1.49 |
Pictures
Cap Kit 
Original caps 
Replaced 
Check of voltage regulator needs to be replaced
Tools needed
- Multimeter (Fluke)
- -ve terminal with aligator clamp
- +ve terminal with a needle probe
We are going to test the voltage regulator in circuit, while active. Therefore, it is important not to short anything while doing this test. Shorting can burn the fuse or fry the chips. Make sure the SNES switch is also not touching any parts of the board.
While the power is off
- Use a aligator clamp to connect to a ground on the board. Connect the other end to the multimeter
- Check the middle pin of the voltage regulator to check ground continuity
Turn the power on and turn on the SNES switch
- Now that the ground pin is connected elsewhere there is no reason for shorts
- Firmly use the needle +ve (red) probe and touch the
- output of the Voltage Regulator. You should get a steady ~5V reading
- input of the Voltage Regulator. You should get a steady ~10V reading
If the above is not the case, time to replace the Voltage Regulator. If everything is good, then there is no reason to replace anything.
Capacitor Replacement
Tools needed
- ESR meter with two aligator probes
While in circuit, you can use the ESR meter to measure capacitance and resistance.