Specifications

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Troubleshooting the
Agilent V24/V26 Series
 Check 60V LED.
___If only the 60V LED is still out or flashing after unplugging the rack from the monitor,
then this indicates a power supply, internal 60V cable, or connector problem.
___Disconnect the 60V power supply to the System Board by disconnecting the 60V cable
from the System Board. If it turns on, this indicates a possible short in the System Board or
connector.
___For the CT model, if the rightmost LED (60V) is flashing once per second there is a
problem with one or more of the parameter module racks connected to the instrument. See
“Parameter Rack/Module Fault (Model V24CT/V26CT)” on page 14.
 Check 5V/12V LEDs
99/('Voperation differs depending on the type of power supply. 5V/12V is used in
the System Board, Flat Panel assembly circuitry, and power supply.
0SRZHUVXSSO\ the 5V/12V LEDs can either flash (attempting to restart) or go
out due to an overload or short circuit.
___Disconnect the power supply to System Board 5V/12V ribbon cable and observe the 5V
and 12V LEDs.
___If the 5V or 12V LEDs remain off, this indicates a Power Supply problem.
___If the 5V LED turns on or stops flashing, this indicates a short after the power supply
(e.g., System Board). If the 12V LED turns on or stops flashing, this also indicates a short
after the power supply (e.g., System Board, Flat Panel circuitry).
0SRZHUVXSSO\ the 5V/12V LEDs will go out due to an overload or short
circuit. The LEDs will not flash. The power supply will not restart, nor will the 5V/12V
LEDs turn on until the AC power is turned off, the fault is removed, and the AC power is
cycled back on again after having been off for approximately 20-30 seconds.
 Check the Flat Panel Assembly and Backlight
___If the 12V LED light is on, this indicates the power supply should be providing power to
the Flat Panel backlight.
___If contrast (Model V24) or brightness (Model V24C/V26C/V24CT/V26CT) adjustment
fails to work properly, check the following:
___Potentiometer assembly
___Flat Panel Adapter Board PRQRFKURPH
___Ribbon cable connecting the CDCI Board to the Flat Panel Adapter Board FRORU
___Flat Panel cabling
___Flat Panel assembly