Operating instructions

Maintenance and service
12.4 Removing and installing hardware components
SIMATIC Panel PC 677B
Operating Instructions, 05/2007, A5E01035609-01
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12.4.11 Installing / removing the motherboard
Preparation
1. Isolate the device from mains and disconnect all connection cables.
2. Open the device.
Removing the motherboard
How to remove the motherboard
1 Remove the drive bay module for the hard disk and DVD burner.
2 Loosen the screws (1). Remove the
module bracket (2).
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3 Remove the power supply cover.
4 Remove the bus board.
5 Remove the power supply.
6 Disconnect all cables from the motherboard, noting down their positions while doing so.
7 Remove the screws (1) (6 pieces) and then the screws (2) (4 pieces). Remove the processor
heat sink.