Agilent Technologies 8753ES Option 011 Service Manual page 229

Table 6-2 Internal Diagnostic Test with Commentary
Test
Sequence
0 All Int — -
1 Preset — -
2 ROM P,AI
3 CMOS RAM P,AI
4 Main DRAM P,AI
5 DSP Wr/Rd P,AI
6 DSP RAM P,AI
7 DSP ALU P,AI
8 DSP Intrpt P,AI
9 DIF Control P,AI
10 DIF P,AI
Counter
11 DSP P,AI
Control
12 Fr Pan — -
Wr/Rd
13 Rear Panel AI
14 Post-reg P,AI
15 Frac-N P,AI
Cont
16 Sweep Trig P,AI
17 ADC Lin — -
18 ADC Ofs — -
19 ABUS Test — -
20 FN Count AI
a. P = Part of "Preset" sequence; AI = part of "All Internal" sequence
b. In decreasing order of probability.
Chapter 6
a
Probable Failed Assemblies
— : Executes tests 3-11, 13-16, 20.
— : Executes tests 2-11, 14-16. Runs at power-on or preset.
A9: Repeats on fail; refer to
to replace ROM or A9.
A9: Replace A9.
A9: Repeats on fail; replace A9.
A9: Replace A9.
A9: Replace A9.
A9: Replace A9.
A9/A10: Remove A10, rerun test. If fail, replace A9. If pass, replace A10.
A9/A10: Most likely A9 assembly.
A10/A9/A12: Check analog bus node 17 for 1 MHz. If correct, A12 is
verified; suspect A10.
A10/A9: Most likely A10.
A2/A1/A9: Run test 23. If fail, replace A2. If pass, problem is on bus
between A9 and A2 or on A9 assembly.
A16/A9: Disconnect A16, and check A9J2 pin 48 for 4 MHz clock signal.
If OK, replace A16. If not, replace A9.
A15/A8/Destination assembly: See
Troubleshooting."
A14: Replace A14.
A14,A10: Most likely A14.
A10: Replace A10.
A10: Replace A10.
A10: Replace A10.
A14/A13/A10: Most likely A14 or A13, as previous tests check A10. See
Chapter 7 , "Source Troubleshooting."
Digital Control Troubleshooting
Run the Internal Diagnostic Tests
b
: Comments and Troubleshooting Hints
"CPU Troubleshooting (A9)" on page 6-5
Chapter 5 , "Power Supply
6-17