HP 5334B - Page 196

8-459. Executive and HP-IB Block Signature Analysis Troubleshooting
8-460. Signature Analysis can be used to troubleshoot the Executive and HP-IB Block components. Follow the
instructions given below.
Setup:
a.
Begin with the
5334B in STANDBY.
b.
Connect a jumper between the Executive MCU
(U19) ST or SP pin (TP17 or TP18) and Ground
(TF'8).
c.
Connect a jumper between the HP-IB MCU
(U17) ST or SP pin (TP14 or TP 15) and Ground (TP8).
d. Apply power to the 5334B and observe that the Counter displays "SA dIAG.
e. Remove jumpers from ST/SP and Ground for both MCUs.
NOTE
The 53348 must remain ON and displaying "SA diAG"
f.
To check the EXECUTIVE BLOCK using Signature Analysis, connect Pod Leads from the signature
analyzer to the
A1 Main Board as follows:
Signature Analyzer U19 Test Points
START LEAD
ST
(TP17)
STOP LEAD
SP
(TP18)
CLOCK LEAD
SA CLK
(TF'13)
GROUND LEAD Ground (TP8)
1.
Apply power to the signature analyzer and observe that its GATE light is flashing.
2.
Set the signature analyzer push button switches as follows:
START BUTTON Rising Edge
STOP BUTTON Falling Edge
CLOCK BUTTON
Falling Edge
3.
Take signatures. Signatures should match those shown in
Figure 8-13.
HP 5334B - Service Manual
8-76