Agilent Technologies 35670-90066 Attach a logic probe to A7 P7 pin 2 SCL, LEDs, and the display

Troubleshooting the Analyzer	Agilent 35670A
To troubleshoot IIC bus failures

G	Step 2. Check the serial clock (SCL).
	• Attach a logic probe to A7 P7 pin 2 (SCL).
	• Set the power switch to on ( l ).
	• Press SW2 (reset switch) while monitoring A7 P7 pin 2 (SCL), the power-on
	LEDs, and the display.
	The TTL logic level should toggle when 00 is displayed and toggle continuously
	when Booting System is displayed. The following failure message should be
	displayed after Booting System and the display grid should appear about 2 minutes
	after power up.
	Front Panel failure information:
	keyboard IIC chip fails:
	IIC: No Device Acknowledge
	key stuck: 32
	A power-on test has failed. Refer
	servicing to qualified personnel.
	Press Start key to attempt to continue
	power-up.

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