PT-TX400, PT-TX310, PT-TW340, PT-TX210, PT-TW250 - Panasonic Projector Service Manual (repair manual). Page 14

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Maintenance
The WARNING indicator will light in red when the lamp runtime (corresponding value) reaches 6,000 hours.
This is to indicate that lamp replacement is required. The lamp runtime is calculated by using the below formula.
The displayed time in [Lamp counter] = "Lamp runtime of [    (Normal)]" × 1.2 +"Lamp runtime of [    (Eco 1)]"
                                                                  + "Lamp runtime of [    (Eco 2)]" × 0.75
 
Normal
 : used time in the normal mode
 
Eco 1
   : used time in the Eco 1 mode
 
Eco 2   
: used time in the Eco 2 mode 
Follow the procedure below to check the lamp runtime:
1
  Press and hold the 
 button on the projector or the remote control for more than 20 seconds. 
 The projector runtime and lamp runtime will be displayed on the screen briefly as follows. 
How to check the lamp runtime
Counter
Projector 
     110H
Lamp 
   
  
Normal                                  60H
Eco1                                    30H
Eco2 
     20H    
Corresponding value           117H
Total used time
Projector used time
Cumulative lamp 
runtime in each 
mode
● To make sure that the display of the [Lamp counter] is reset to [0 H].
● Please try step 2) again if the lamp counter has not been reset.
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