Slow Clock - HP 10312D Operating Manual

Slow Clock
If you have the interface module hooked up and running and observe a
slow clock or no activity from the interface board, the
+
5 V supply
coming from the analyzer may not be getting to the interface board.
To check the
+
5 V supply coming from the analyzer, disconnect one of
the logic analyzer cables from the HP 10269C and measure across pins
1and2 or pins 39 and 40 (see figure 1-6).
• If
+
5 V isn't observed across these pins, check the internal
preprocessor fuse on the HP 1650A or HP 16510A Logic
Analyzer. For information on checking this fuse, refer to the
HP 1650A or HP 16510A service manuals.
• If
+
5 V is observed across these pins and you feel confident that
the
+
5 V is getting to the interface module, contact your nearest
Hewlett-Packard Sales/Service Office for information on servicing
the board.
1 <+5V)
2 < GND)
39 <+5V)
MISC/EX50
Figure 1-6. Pinout for the Logic Analyzer Cable
Analyz.ing the Intel 80286
1-15