Corsair CX500

Corsair CX500

Preliminary Information
Release Year	~2013
Leak Risk	Low
Mounting Technology	Through Hole, SMD
Capacitor Types	Aluminum Electrolytic, Ceramic
Destructive Entry	No

The Corsair CX500 is one of the budget model PSU's. It's very similar to the CX450 and CX600 and its modular counterpart CX500M.

This PSU used CapXon brand capacitors, so they might fail quicker than usual.

Known Issues

Cause

After several years of use, the computer will sometimes not turn on. In-particular the the 'Power Good' signal will not work even though it's outputting all the voltage rails correctly.

Solution

• Change/Modify a single resistor. This is not a capacitor issue

Original Parts

Located on the back of the PCB, near the middle.

Resistors

RefDes	Qty	Resistance	Mount	Size	Brand
R45	1	22K	SMD	0805	Unknown

Replacement Parts

Resistor

RefDes	Qty	Replacement Part Type	Compatible Part Number	Distributor Links [ Preferred / Search ]
				Digikey		Mouser		Farnell		RS Components	LCSC
R45	1	15kΩ 0805 (2012 Metric) SMD Resistor	RE0805FRE0715KL / RC0805FR-1315KL / RL0805FR-7W0R33L / RC0805FR-0715KL / FRC0805J153 TS	Part	🔎	Part	🔎	Part	🔎	Part	Part

Generally speaking you do not need to buy a resistor. Most SMD's can be obtained from an old circuit board. If you can not find a 15K you can use a slightly higher value.

Alternatively you can parallel up a resistor on top of the existing resistor. E.G use a value from 47K to 100K and solder it directly on top. Providing Pin 1 of the power monitoring IC is about 2.5v. (as long as it is above the 1.3v it currently is)

Related Media

• Video Repairing the PSU

Additional Images

• 
  Open Lid
• 
  PCB Bottom
• 
  Partial schematic around the Monitor Chip

References

PS229 Power Monitor IC