Agilent Technologies 6684A, 6680A, 6683A, 6681A, 6682A service manual Secondary Interface SA Test

Table 3-7. Secondary Interface SA Test

Description: These signatures check the secondary microprocessor A5U504.

Valid A5U504 ROM Firmware Revision: A.01.04

Test Setup: See Figure 3-17.

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

2.To obtain a setup that allows access to components and test points on the A5 Control Board, follow the procedure given in Table 3-3 under "A5 Control Board Setup".

3.Connect signature analyzer CLOCK, START, STOP, and GROUND inputs and setup as shown in Figure 3-15.

4.To place the secondary interface in the SA mode, turn on the power supply while momentarily (for 2 seconds) shorting A5U504-1 to A5U504-20 (common).

5.Use the signature analyzer probe to take the following signatures:

Power:	5V = lC4C
Microprocessor:	A5U504-1 = F77H	A5U504-21 = 0C98
	A5U504-2 = C98P	A5U504-22 = 5PC7
	A5U504-3 = 1573	A5U504-23 = 0000
	A5U504-4 = P42A	A5U504-24 = 6CAP
	A5U504-5 = UHF8	A5U504-25 = A339
	A5U504-6 = F5UC	A5U504-26 = A319
	A5U504-7 = UH8C	A5U504-27 = A339
	A5U504-8 = 23UC	A5U504-28 = 0C98
	A5U504-9 = 0000	A5U504-29 = lC4C
	A5U504-10 = IC4C	A5U504-30 = 0000
	A5U504-11 = lC4C	A5U504-31 = lC4C
	A5U504-12 = C76F	A5U504-32 = 0000
	A5U504-13 = U042	A5U504-33 = 0000
	A5U504-14 = 2189	A5U504-34 = lC47
	A5U504-15 = lC4C	A5U504-35 = 0000
	A5U504-16 = lC45	A5U504-36 = 0UPU
	A5U504-17 = 0010	A5U504-37 = UF7P
	A5U504-18 = IC4C	A5U504-38 = 347F
	A5U504-19 = lC4C	A5U504-39 = CP47
	A5U504-20 = 0000	A5U504-40 = lC4C

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

Note After completing this test, you can exit the SA mode only by performing a power-on reset.

Troubleshooting 61