70
8-3
Replacing the Backlight
The backlight can be replaced for NT20M-DT13
j
, NT20M-DN
j
, and
NT2000M-D
j
131 PTs. When the screen begins to flicker or get darker, re-
place the backlight by replacing the CFL Unit.
CFL Unit model
For NT20M:
NT20M-CFL01
For NT2000M:
NT200M-CFL01
Service life (See note)
Approx. 20,000 hours at 25
°
C.
Note The service life is taken to be the time it takes for the backlight to lose 50% of
its brightness.
1) Turn off the power to the PT.
2) Pull out the backlight cover on the right side of the PT by placing your fin-
ger on the top and pulling it forward.
NT20M
Cover
3) Pull out the attached CFL Unit cord and slowly pull off the connector, being
careful to pull it straight.
CFL Unit
Lock mechanism
Cord
Connector
4) On the right side of the CFL Unit there is a latch. Bend it to the left (i.e., to
the side of the PT display panel) to unlock the CFL Unit from the print board.
Then pull the CFL Unit straight out. Be careful not to directly touch the fluo-
rescent tube.
Lock mechanism
Latch
5) Insert the new CFL Unit, and bend the latch back to lock the CFL Unit to
the print board. If it is difficult to insert it, the cord may be getting in the way.
Do not try to force it, but just push the cord to the top and insert the CFL Unit
slowly.
6) Insert the connector, being careful to match the polarity. Fit the cord in and
replace the cover.
NT20M-DT/DN13
j
Backlights
Maintenance and Inspection
Section 8-4