IMac G5 A1144

For more information, see this article's corresponding Wikipedia page: Device.

Apple iMac G5/1.9 17" (iSight) (A1144)

Preliminary Information
Release Year	2005
Leak Risk	Medium
Batteries	CR2032
Mounting Technology	Though Hole, SMD
Capacitor Types	Aluminum Electrolytic
Destructive Entry	No

The Apple iMac G5/1.9 17" (iSight (A1144) was the final PowerPC based Macintosh released by Apple prior to the Intel transition.

Known Issues

Symptom or Problem Encountered

Upon power-on, mouse pointer is displayed along with spinning wheel. A repeating pattern of vertical lines is displayed on the screen.

Note: This particular unit's serial number, starting with W8, can include defective LCD screens, however, repair will be attempted as visibly bad components exist near the GPU.

Observed Fault

Causes

• Two visibly bad through hole capacitors identified on mainboard at positions C1309 and C8509. These are United Chemi-Con KZJ series 1800 uF 6.3v capacitors. They are the only two examples of that component to the left of the GPU. All other examples to the lower right of the CPU appear okay visually.

Solutions

• Replacements for C1309 and C8509 will be ordered and installed.

Disassembly Notes

The iFixIt guide is essential when working on this machine. Disassembly is not difficult but there are many steps required. All capacitors are located on the underside of the board and cannot be inspected without removal of the mainboard from the chasis.

Original Parts

Motherboard

Apple 820-1783-A

Capacitor Specifications and Footprint Information

RefDes	Capacitance	Voltage	Mount	Diameter/Size	Height	Lead Spacing	Temp	Type	Brand	Series
C3203	120 µF	16 v	Through Hole	6.5 mm	12.5 mm	5 mm	105 °C	Electrolytic	United Chemi-Con	KY
C1309	1800 µF	6.3 v	Through Hole	10 mm	14 mm	5 mm	105 °C	Electrolytic	United Chemi-Con	KZJ
C1202	680 µF	16 v	Through Hole	10 mm	12.5 mm	5 mm	105 °C	Electrolytic	Panasonic	FL
C8502	680 µF	16 v	Through Hole	10 mm	12.5 mm	5 mm	105 °C	Electrolytic	Panasonic	FL
C8503	680 µF	16 v	Through Hole	10 mm	12.5 mm	5 mm	105 °C	Electrolytic	Panasonic	FL
C3253	120 µF	16 v	Through Hole	6.5 mm	12.5 mm	5 mm	105 °C	Electrolytic	United Chemi-Con	KY
C8509	1800 µF	6.3 v	Through Hole	10 mm	14 mm	5 mm	105 °C	Electrolytic	United Chemi-Con	KZJ
C1208	1500 µF	6.3 v	Through Hole	10 mm	12.5 mm	5 mm	105 °C	Electrolytic	Panasonic	FL
C1209	1500 µF	6.3 v	Through Hole	10 mm	12.5 mm	5 mm	105 °C	Electrolytic	Panasonic	FL
C1102	680 µF	16 v	Through Hole	10 mm	12.5 mm	5 mm	105 °C	Electrolytic	Panasonic	FL
C1103	680 µF	16 v	Through Hole	10 mm	12.5 mm	5 mm	105 °C	Electrolytic	Panasonic	FL
C1109	1500 µF	6.3 v	Through Hole	10 mm	12.5 mm	5 mm	105 °C	Electrolytic	Panasonic	FL
C5034	1000 µF	16 v	Through Hole	10 mm	15 mm	5 mm	105 °C	Electrolytic	Rubycon	MCZ
C5021	1000 µF	16 v	Through Hole	10 mm	15 mm	5 mm	105 °C	Electrolytic	Rubycon	MCZ
C5011	680 µF	16 v	Through Hole	10 mm	12.5 mm	5 mm	105 °C	Electrolytic	Panasonic	FL
C3303	120 µF	16 v	Through Hole	6.5 mm	12.5 mm	5 mm	105 °C	Electrolytic	United Chemi-Con	KY
C5033	1800 µF	6.3 v	Through Hole	10 mm	14 mm	5 mm	105 °C	Electrolytic	United Chemi-Con	KZJ
C5041	1800 µF	6.3 v	Through Hole	10 mm	14 mm	5 mm	105 °C	Electrolytic	United Chemi-Con	KZJ
C5040	1800 µF	6.3 v	Through Hole	10 mm	14 mm	5 mm	105 °C	Electrolytic	United Chemi-Con	KZJ
C5032	1800 µF	6.3 v	Through Hole	10 mm	14 mm	5 mm	105 °C	Electrolytic	United Chemi-Con	KZJ
C5042	1800 µF	6.3 v	Through Hole	10 mm	14 mm	5 mm	105 °C	Electrolytic	United Chemi-Con	KZJ
C5039	1800 µF	6.3 v	Through Hole	10 mm	14 mm	5 mm	105 °C	Electrolytic	United Chemi-Con	KZJ
C5043	1800 µF	6.3 v	Through Hole	10 mm	14 mm	5 mm	105 °C	Electrolytic	United Chemi-Con	KZJ
C5028	1800 µF	6.3 v	Through Hole	10 mm	14 mm	5 mm	105 °C	Electrolytic	United Chemi-Con	KZJ
C5038	1800 µF	6.3 v	Through Hole	10 mm	14 mm	5 mm	105 °C	Electrolytic	United Chemi-Con	KZJ
C5018	1800 µF	6.3 v	Through Hole	10 mm	14 mm	5 mm	105 °C	Electrolytic	United Chemi-Con	KZJ
C5037	1800 µF	6.3 v	Through Hole	10 mm	14 mm	5 mm	105 °C	Electrolytic	United Chemi-Con	KZJ
C5017	1800 µF	6.3 v	Through Hole	10 mm	14 mm	5 mm	105 °C	Electrolytic	United Chemi-Con	KZJ

The markings for C5033 and C5041 will likely be obscured by the CPU foam. On this revision, C5033 is on the left and C5041 on the right

There are numerous surface mount caps on this board. I have not attempted to survey them yet. No leakage is observed

All physical measurements are via measurement, rather than manufacturer specification, and may be imprecise.

Replacement Parts

Capacitors

RefDes	Compatible Part Number	Order Links
C1309		Digikey
C8509

If parts are not available or different selection is preferred, you can use the values in the Original Parts section to perform a parametric search.

References

Apple iMac G5/1.9 17" (iSight) Specs (everymac.com)

iMac G5 17" Model A1144 Repair (ifixit.com)

iMac G5 (Wikipedia)