Agilent Technologies 35670-90066 manual To troubleshoot power-up failures

Agilent 35670A	Troubleshooting the Analyzer
	To troubleshoot power-up failures

To troubleshoot power-up failures

Use this test when the screen is defective, when the analyzer does not respond correctly to the keyboard, or when it takes more than 3 minutes for the keyboard to become active. Any of the following conditions may cause a power-up failure:

•A defective CPU or Memory assembly.

•A defective assembly connected to the CPU assembly causing a bus failure.

•A defective cable between the CPU assembly and another assembly.

•A defective control line.

Step 1. Compare the power-up failure messages to the following table.

• Set the power switch to on ( l ).

• If the screen is blank or no power-up failure messages are displayed, go to

Step 2.

• Determine the probable faulty assembly or next test by comparing the

G	power-up test result to the following table.
	If the power-up failure messages match more than one entry in the table, use the
	entry closest to the beginning of the table.
	Failing Power-up Message	Probable Faulty Assembly or Next Test
	LEDs	A7 CPU
	MC68030 Processor
	MC68882 Coprocessor
	Bootrom
	Display
	Main RAM	CPU, memory, DSP, and buses failures,
	Program ROM	page 4-18
	DSP	A7 CPU
	Fast bus	IIC Bus failures, page 4-25
	MFP	A7 CPU
	GPIB keypress detected, booting to GPIB Monitor	A14 Secondary Keypad
	Front Panel failure information:	A11 Keyboard Controller
	keyboard IIC chip fails:
	IIC: No Device Acknowledge
	key stuck: 32
	Front Panel failure information:	A14 Secondary Keypad
	key stuck: number
	where number is 13, 14, 16, 20, 21, 24, 33,
	35, 36, 37, 38, 40, 43, 52, 53, or 54
	Front Panel failure information:	A13 or A15 Primary Keypad
	key stuck: number
	all other numbers not listed above

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