Agilent Technologies 6682A, 6684A, 6680A, 6683A, 6681A Valid A1U4 ROM Firmware Revision A.01.07

Figure 3-16. Signature Analysis Connections, (Sheet 2 of 2)

Table 3-6. Front Panel SA Test

Description: These signatures check front panel microprocessor AlU3.

Valid A1U4 ROM Firmware Revision: A.01.07

Test Setup: See Figure 3-17.

1 .Turn off the power supply and remove the top cover.

2.To gain access to A1 Front Panel Board, perform steps 1 and 2 of the disassembly procedure for A1 Front Panel Assembly (see "Disassembly Procedures").

3.Connect SA jumper of connector J3 on A1 Front Panel Board (see Figure 3-15).

4.Connect signature analyzer CLOCK, START, STOP, and GROUND inputs and setup as shown in Figure 3-16.

5.Turn on the power supply and use the signature analyzer probe to take the following signatures:

Power:	5V = 3395
Microprocessor:	AlU3-15 = 3395		A1U3-29 = 1029
	AlU3-19 = 552U		AlU3-30 = 0295
	AlU3-20 = 954C		AlU3-31 = 0000
	AlU3-21 = A552		AlU3-32= 3395
	AlU3-22 = 2954		AlU3-33 = 0008
	AlU3-23 = 0A55		AlU3-34 = 040A
	AlU3-24 = 3395		AlU3-35 = 0102
	AlU3-25	= 3395	AlU3-38 = 0002
	AlU3-26	= 0000	AlU3-39 = 0020
	AlU3-27	= 0000	AlU3-42 = 3395
	AlU3-28	= 40A5

6.After completing the tests, be sure to return the J3 jumper to its original position.

60 Troubleshooting