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Apple iMac G5 Power Supply "B" Style

Capacitor Replacements Upgrade List

• 4700uf (qty. 1) 12.5mm X 25mm 10 V
• 2200uf (qty. 2) 10mm X 23mm 10 V
• 1000uf (qty. 3) 8mm X 20mm 16 V
• 1200uf (qty. 1) 10mm X 23mm 16 V
• 1000uf (qty. 1) 12.5mm X 25mm 35 V
• 330uf (qty. 1) 10mm X 12.5mm 35 V

Refer to the list of Apple iMac G5 Power Supplies with detailed pictures and capacitor upgrade replacement comparisons. Be sure to verify which Apple iMac G5 power supply you have.

Capacitors are all high quality, switching power supply grade, low ESR, and long life ratings. The 4700uf is the longest life rating. Upgrade notice: Because of the difficulty in obtaining 10mm X 30mm 4700uf 6.3 Volts rated capacitors, I have upgraded the 4700uf to the 12.5mm X 25mm size 10 Volts rated capacitor. These 4700uf capacitors will fit into the space on the PSUs, but will stand above the circuit board slightly because of other components in the way at the base of the larger diameter capacitor. Note, the original 4700uf capacitors in my opinion were standing too high and shorting out on the top of the metal power supply cover as can be seen in the original trouble shooting section of the Apple iMac G5 Power Supply repair article I wrote.

Additionally, the 1000uF 35 Volts rated cap is now 12.5mm X 25mm in height instead of the 20mm height due to the difficulty in obtaining the old 12.5mm x 20mm. This caps have a significantly longer life rating than the originals, and will fit inside the case with no problems. The PSU case actually has approximately 31mm height capabilities from the top of the printed circuit board to the inside of the metal cover. Note also, that some of the capacitors have been upgraded in voltage ratings. This was done as a matter of choice, in that a higher voltage is not necessarily required in the power supply, but where appropriate sizes were available in higher voltage ratings, I made the upgrade substitutions for extended performance and life expectancies.

I include a replacement chart showing the original value capacitor and the replacement value capacitor with your PSU cap order. Please refer to this chart when installing the new caps.

Be sure to double check your mother board capacitors too. Purchase both the MOB and PSU caps, and save on shipping costs.

Add the handy 12 in 1 multifunction torx screwdriver to your order too.