LeCroy WAVERUNNER 6000 SERIES - Page 140

6-44 Maintenance
6.8.6 Internal Display Problem
V ERIFY THAT THE CABLE IS
CONNECTED
BETWEEN THE AGP/
DVO I
NTERFACE AND THE TFT
T HIS PROCEDURE ASSUMES THAT
VIDEO
IS PRESENT ON AN EXTERNAL
MONITOR
* CONNECTED TO THE REAR PANEL OR
THAT
THE FRONT PANEL BECOMES ACTIVE AS IF
THE
SCOPE HAD BOOTED UP AND IS
OPERATIONAL
I S +12V PRESENT ?
M EASURE THE VOLTAGE AT THE
INPUT
TO THE TFT INVERTER
( PINS 1 & 2)
Y ES
N O
T ROUBLESHOOT C AUSE , +12V
COMES FROM MAIN POWER
SUPPLY
ON J11 OF THE DVI
CARD , STRAIGHT THROUGH DVI
CARD AND OUT ON PINS 1 & 2 OF
J3 OF THE DVI CARD .
I S IT +12V?
M EASURE THE VOLTAGE AT P IN 5
OF THE INPUT CABLE TO THE
TFT INVERTER . (B ACKLIGHT
C ONTROL ?)
Y ES
N O
R EPLACE AGP/DVO I NTERFACE
R EPLACE I NVERTER
R EPLACE TFT & T OUCH S CREEN
*External monitor must be connected to rear panel connector before power is turned on to scope.
*External video will not be present after Windows starts booting unless it is enabled from within
Windows however it will be visible for ~30 seconds after power on..
V ERIFY THAT THE CABLE IS
CONNECTED
BETWEEN THE AGP/
DVO I
NTERFACE AND THE TFT
INVERTER BOARD