On Jun 30, 2009, at 3:42 PM, Adam wrote:
> It sounds as though Jim is saying I might, if I am game, try replacing > the PAV board, if I can figure out what PAV board is right. Any ideas > about how I could find that out? Two PAV boards were used for your G3/700 iMac. One board, 661-2465, had a switch at the SW901 position, which is approximately halfway between the flyback transformer (FBT) and the rectangular opening in the center of the board. The FBT is the black rectangular-ish object from which a red or black wire at the top connects to the top of the CRT. The switch, which is a silver rectangle with a black slider, has printed markings on the board on the side nearest the FBT that say "CPT 1-2-3 LG". The switch is slid to either end, depending on whether an LG or a CPT CRT is being used. LG CRTs have a black plastic shield over the yoke marked "LG." CPT shields look similar, but are unmarked. However, if your iMac has the slider switch and the CRT black plastic shield isn't marked, it's got to be a CPT CRT, especially is the switch is slid to the CPT position. The other board is Apple Part No. 661-2466. It does not have a switch at the SW901 position on the power/analog board. Here's where it gets maddening: the Apple Part No.'s above usually aren't marked on the boards. Instead, there's a much longer number. Do some Googling around and look at some web sites, including eBay, where used PAV boards are sold, and you'll begin to understand what I've said above, including the part number stuff. BOTTOM LINE: Determine which board your iMac has -- with the switch or without -- and get one just like it. If you want to make absolutely sure, take your iMac apart (either using one of the online take-apart guides or the iMac Summer 2001 Apple Service Source manual, being careful about discharge of the CRT procedures), and read the other "Part No." most online sellers use, which is printed at the top center edge of the board, if the board is oriented in such a manner that the narrow end is down, the wide end is up and the FBT is on the right. HTH, Jim P.S.: The bad PAV assembly I replaced this past weekend was matched with an LG CRT. The PAV assembly that went into the iMac had a slider switch. I moved the switch to the LG position, and the iMac fired right up. P.P.S.: If you're going to do the job yourself, pay attention to safety procedures around the CRT, and be aware that on-board capacitors may still have a charge in them. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed Low End Mac's G3-5 List, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/g3-5-list?hl=en Low End Mac RSS feed at feed://lowendmac.com/feed.xml -~----------~----~----~----~------~----~------~--~---
