HP 8753E Service Manual

‘ICable 6-2. Internal Diagnostic ‘I&t with Commentary
lkst
0Allrnt
1 Preset
2IwM
3CMosRAM
QMahlDRAM
5 DSP WrlRd
6DSPRAM
7DSPALU
8 DSP Intrpt
9 DIP Control
10 DIP Counter
11 DSP Control
12 Fr Pan Wr/Rd
13 Rear Panel
14 Post-reg
15 FYac-N Cant
16 Sweep !l’rig
17ADcLin
18ADcofs
19 ABUS lbst
20 PN count
Seauence’
Probable Fniled AwembliPat I
--- I
Comments and Troubleshooting Hints
-: Executes tests 3-11,13-16,20.
-: Executes tests 2-11, 14-16. Runs at power-on or preset.
AOz Repeats on fail; refer to “CPU Troubleshooting (As)” in this chapter
to replace ROM or A9.
AOt Beplace A9.
AOz Repeats on fail; replace A9.
AOz Replace A9.
AOI Replace A9.
A& Replace A9.
AO/AlO: Remove AlO, rerun test. If fail, replace A9. If paw, replace AlC
AOiAlO: Most likely A0 assembly.
AlO/AO/AlP: Check analog bus node 17 for 1 MHz. If correct, Al2 is
verified; suspect AlO.
AlO/& Most likely AlO.
A2iAlIAg: Run test 23. lf fail, replace A2. If pass, problem is on bus
between AS and A2 or on A9 assembly.
AlB/AOz Disconnect A16, and check A9J2 pin 48 for 4 IdIiz clock signal.
If OK, replace A16. If not, replace A9.
AlS/A8/Destination assembly: See Chapter 6, ‘Power Supply
Troubleshootiug.”
A14: Replace A14.
A14,AlOz Most likely A14.
Al& Replace AlO.
A10: Replace AlO.
AlO: Replace AlO.
A14lA13/A10: Most likely Al4 or A13, as previous tests check AlO. See
1 Chapter 7, “Source Troubleshooting.”
*P-
part of PRESET sequence; AI -part of ALL INTERNAL sequence.
t in decreasiug order of probability.
6-16 Digital ControlTroubleshooting

HP 8753E Specifications

General

Brand	HP
Model	8753E
Category	Measuring Instruments
Language	English