Mitsubishi Electric MELDAS 600M Series Instruction Manual page 425

7.2.2 Replacing the backlights
A cold-cathode tube is used as a light source (backlight) in the LCD panel.
The life of the backlight is 10,000 h/25°C (Time to when the luminance drops to 50% of the initial
value.)
The backlight life is dependent on the temperature. The life tends to be shorter when used
continuously at lower temperatures.
LCD panel........... KCS6448HSTT-X3 (Kyocera)
Backlight ............. KCI-04 (Kyocera)
Backlight life ....... 10,000 h/25°C (Time to when the luminance drops to 50% of the initial value.)
(1) Replacement procedure
Turn the control section power OFF when replacing the LCD panel backlight.
1) Confirm that the control unit power is OFF. (If the power is not OFF, turn it OFF.)
2) Open the operation box door.
3) Pull the connectors connected to the backlights out from the backlight power PCB. (Two
4) Remove the fixing screws (two locations, top and bottom left) of the control section installation
5) Pull out the backlights built into the top and bottom left of the LCD panel. (The backlights have
6) Insert the two new backlights into the top and bottom left of the LCD panel. (Press in until the
7) Close the control section installation fitting, and fix it with the fixing screws. (Two locations, top
8) Connect the backlight connectors to the backlight power PCB.
9) Close the operation box door.
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locations, top and bottom left.)
fitting, and open the control section installation fitting.
locking claws on the front. Hold these claws down while pulling the backlight out.)
locking claws click.)
and bottom left.)
Backlight
Press in
Pull out
LCD panel
Press in
Pull out
Backlight
CAUTION
Do not replace the backlight while the power is ON.
Dispose of the spent backlights according to local laws.
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CHAPTER 3 MAINTENANCE
7. Daily Maintenance
LCD section (back)
Open
Control section installation fitting
Fixing screw
Connector
Backlight
power PCB
Connector
Fixing screw
III – 39
Control section