Troubleshooting - 3
31
"E" From Sheet 2
Connect DC coupled
scope across the
output terminals and
turn on the supply while
observing the scope.
Output
momentarily goes
high
?
Disable the OV
protection by sending
the command
"DIAG:SCR 0"
No
Unit still OVs?
U327-7 Low
(OV_DETECT*)
?
OV_PROG = +4V?
Yes
Check that OV is
programmed to
maximum or replace
A2 Interface board
Check U327 circuit
Yes
No
Replace A2 Interface
board
No
Replace A2 Interface
Board
Yes
No
Go to "Output Held High",
Sheet 10,"F"
Yes
Figure 3-1 Sheet 9. Overvoltage at Turn-On
Summary of Contents for 6612B
Page 8: ......
Page 25: ...Troubleshooting 3 25 Figure 3 1 Sheet 3 Main Flowchart...
Page 46: ......
Page 49: ...Principles of Operation 4 49 Figure 4 1 A2 A3 Block Diagram...
Page 51: ...Principles of Operation 4 51 Figure 4 2 A1 Block Diagram...
Page 54: ......
Page 57: ...Replaceable Parts 5 57 Figure 5 1 Mechanical Parts ldentification...
Page 67: ...Figure 6 1 A1 Board Component Locations...
Page 68: ...Figure 6 2 A4 Board Component Locations...
Page 69: ...Figure 6 3 A1 Board schematic sheet 1...
Page 70: ...Figure 6 3 A1 Board schematic sheet 2...
Page 71: ...Figure 6 3 A1 Board schematic sheet 3...
Page 72: ......