A60 Processor Assembly-Level Troubleshooting - HP 8340B Manual

Table F-2. Input Signal
Voltages
Measurement Point
Voltage
A60TP11(LSTP)
A60TP21
(+5V)
A60TP22 (HRAMPUP)
A60TP23 (LRESET)
A60P1-33(Vpp)
A60U38
Pin
23 (VRAM)
A60U1 Pin 8
(VREF)
+5PF
(anode of A60CR1 or A60CR4)
+5V
+5V
+5V
+5V
+4 5V
+5V
+1.2V
+5V
* A
microprocessor failure can cause
LSTP to
be low
4.
Verify the following waveforms:
50
nS/div
>
i-i
•o
\
>
^-i
-AA
A/v
U-. .:'
iM-
^
ftfi^
A60U5 PIN 6 HPIB CLK
50
nS/div
>
r-i
'o
^s.
>
<
OVdc
AGOTP24
CLK
A60
Processor
Assembly-Level Troubleshooting
HP 8340B/41B