Agilent Technologies 6612B, Service Manual, Page: 28 / 74

3 - Troubleshooting
28
"B" From Sheet 2
Output and display
close to prog value
?
Calibrate Voltage
Yes
CC Annunciator
ON?
Unreg Annunciator
ON
?
No
No
CV_PROG OK?
Replace A2 Interface
board
No
VMON OK?
Yes
Troubleshoot U322B
circuit
No
If output is OK and readback is
not, replace A2 Interface board.
If the display equals the output,
troubleshoot U322A circuit
Yes
CV_PROG @ R322 should
be 0 to -4.8 volts for 0 to
full scale programmed
voltage and VMON @
U322-7 should be 0 to 4.7
volts for 0 to full scale
output voltage
No
Go to "Current
Troubleshooting" Sheet 7, "C"
Yes
Go to "No Output",
Sheet 8, "D"
Yes
Figure 3-1 Sheet 6. Voltage Troubleshooting