Apple lc 520.550.575 Servicehandbuch

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 Take Apart
Chassis Harness Assembly - 41
Speaker Assembly
First remove the EMI 
shields.
Caution:
  The speaker wire 
connections on the chassis 
cable bridge are very 
fragile. Avoid removing or 
replacing the speaker wires 
unless you need to replace 
the chassis or have isolated 
the problem to the speaker 
wires. (That is, replace and 
test the speakers, front 
panel control board, and 
analog board first.)