Service manual

30 Troubleshooting
PROGRAM OV TO MAXIMUM AND PRESS PROT
CLEAR KEY. OUTPUT SHOULD GO TO FULL
SCALE VOLTAGE.
PRESS OUTPUT ON/OFF REPEATEDLY WHILE
WATCHING VOLTAGE DISPLAY. DOWN-
PROGRAMMING SHOULD TAKE < 1 SECOND.
LESS THAN
1 SECOND?
TURN OFF SUPPLY AND CONNECT A GPIB
CONTROLLER TO SUPPLY. CHECK IF SUPPLY
ACCEPTS GPIB COMMANDS.
ACCEPTS
COMMANDS?
CHECK OPERATION OF DIGITAL CONTROL
PORT, SERIAL LINK AND THE FRONT PANEL
V/I ROTARY CONTROLS.
DIGITAL
CONTROL PORT
OK?
SERIAL
LINK OK?
FRONT PANEL
CONTROLS OK?
NO PROBLEMS FOUND. PERFORM VERIFICATION
TESTS IN CHAPTER 2 TO ISOLATE PROBLEM.
GO TO 'SLOW DOWN PROGRAMMING'
TROUBLESHOOTING (SEE FIG. 3-12).
PROBABLE DEFECTIVE A2 BOARD
PROBABLE DEFECTIVE A2 BOARD
PROBABLE DEFECTIVE A2 BOARD
CHECK VOLTAGE RPG (A1G1) AND/OR
CURRENT RPG (A1G2) CONTROLS AND
FROM SHEET 2
D
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
CABLE CONNECTIONS.
Figure 3-1. Overall Troubleshooting (Sheet 3 of 4)