Apple 20 manual CN253 CN254 Serial I/O Board CN250

Take Apart	Main Deflection Board - 39
6	Disconnect these cables
	from the serial I/O
	board:
	• CN250
	• CN253 (from video
	cable)
	• CN254 (from CRT/
	video board)

CN253

CN254	Serial I/O Board	Ê
CN250

Replacement Note: The 3-pin connector from the video cable connects to connector CN253 and the 3-pin connector from the CRT/video board connects to connector CN254.