HP 4262A User Manual

Section VIII
Model
4262A
Figure
8-19
START _/~ A22TP4
STOP /= A22TP¢
CLOCK ./~ A22TP2
START -/~ A23Ul pin 32
(E)——{ STOP ™\_ A2301 pin 32
CLOCK /™ az2TP2
Troubleshoot
Stuck Node.
Window Test
+5V 65922
Check A22US6, U7,
U14 and U185,
Window Test
+5V 105C?
YES {15 Signature Set 18 \YES I3 Signature at A22)YES
OK? TP2 00007
Go to Flow Diagram F. Check A22Y1, CT
and U6.
I Chack622012.]
Nanoprocessor
at A22 \YES
Data Bus Stuck?
U13 pin 6 36447
1s Signature Set 19 \YES
OK?
Troubleshoot
Stuck Bus.
‘Troubleshoot
Stuck Node,
Check A22U21, Check A22U13.
Figure 8-19. Digital Section Troubleshooting Procedures.
Flow Diagram E. A22 Board Diagnostic Flow Diagram (Clock and RAM).
8-39

HP 4262A Specifications

General

Brand	HP
Model	4262A
Category	Measuring Instruments
Language	English