Service manual

PN 4237242C
4.12-3
SERVICE AND REPAIR PROCEDURES
+24 VOLT SWITCHING POWER SUPPLY
4
Verification
1. Turn ON the instrument’s power and allow the system to reach the Main Menu. This
verifies the operation of the +24 V power supply.
Note: The +24 V turns on when the system software is loaded. An error is displayed on
the screen (ERROR DETECTED (015) Power Supply Failure) if there is no +24 V, and the
Main Menu is never displayed on the screen. Since this power supply has regulating
sense lines, it self-adjusts, checking and adjusting with a voltmeter is unnecessary. If the
power supply is unable to attain +24 V, it signals the instrument that there is a problem
and ERROR DETECTED (015) Power Supply Failure is displayed on the screen.
2. Perform an SVP (Heading 5.1).