The following instructions explain how to remove the down converter board on the iMac computer.

DANGER! This procedure exposes you to high voltages that can result in death or serious injury. DO NOT ATTEMPT THIS PROCEDURE IF YOU HAVE NOT BEEN CERTIFIED AS AN APPLE-AUTHORIZED TECHNICIAN.

The down converter board is shown below in Figure 1.

Figure 1 iMac Down Converter Board

Products

• iMac (Slot-Loading), iMac (Summer 2000)

Tools Required

• Phillips screwdriver (#1 and #2), long shaft
• ESD mat

Procedure

Before you begin :

Position the computer upside-down, resting the computer on an ESD mat or other soft surface and remove the following:

• bottom housing, article 95067 - iMac: Removing the Bottom Housing
• EMI cover, article 95070 - iMac: Removing the EMI Cover
• SDRAM, article 95071 - iMac: Removing the SDRAM DIMM

1. Disconnect the following cables on the back of the CD/HD carrier:
   • hard drive power cable
   • hard drive data cable
   • CD-ROM/DVD-ROM data cable
   • logic board cable connector
   See Figure 2 below.
   
   
   Figure 2 CD/HD Drive Cables
   
   
2. If the AirPort card is installed, disconnect the antenna from the AirPort card.
   
   
3. Using a Phillips screwdriver, remove six screws on the logic board and five screws on the down converter board. See Figure 3 below.
   
   
   Figure 3 Logic Board Screws
   
   
4. Gently lift the down converter board and logic board out of the computer. See Figure 4 below.
   
   
   Figure 4 Removing the Logic Board and Down Converter
   
   
5. Using a flatblade screwdriver, pry the plastic rivet off the logic board. See Figure 5 below.
   
   
   Figure 5 Removing the Rivet
   
   
6. Holding onto the down converter, press down on the black connector and separate the down converter board from the logic board. See Figure 6 below. Note: If you are returning the logic board to Apple, remove the SDRAM, any cables, the modem, the AirPort Card, and I/O panel.
   
   
   Figure 6 Separating the Down Converter Board from the Logic Board