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Replace Lamp Unit
Check the voltage at following
pins of connector P1905.
Is Lamp ON?
Pin 1-Pin 8 (GND): approx. 16 V
Pin 2-Pin 8 (GND): approx. 14 V
Pin 4-Pin 8 (GND): approx. 7 V
NO
Pin 5-Pin 8 (GND): approx. 3.3 V
Note: Disconnect connector
Replace the Main Power PWB
and Ballast PWB.
POWER DOSE NOT
TURN ON
Turn the Power ON
Lamp dose not light up
NO
Is Duct fan (1) and (2) turning?
YES
Is the signal (Lamp ON-H) at Pin
NO
1 of P1904 High (approx. 5V)?
YES
Is there a slight cracking sound
when voltage is generated for
Lamp?
YES
NO
YES
NO
P1905 to check abobe
voltage if you checked
previously.
Caution:
Use a separate Isolation Transformer for this
unit when servicing.
Because a Hot Chassis Ground is preset in the Main
Power Circuit, an Isolation Transformer must be used.
Dose the Power LED on the
Power button light Red or Green
(Solid or flashing light)?
YES
Relace the Main Power PWB.
OK
Check Operation PWB.
NG
Relace the Oparation PWB.
Pull out hte power code and
disconnect Connector P1904,
P1905 on the Main PWB.
Wait approx. 10 minutes and
plug in the power cord.
Is there any sound of relay on
YES
with connector P1904, P1905
disconnected?
NO
OK
Check Fuse (F1101, F1102) on the Inlet PWB.
Replace defective fuse and the Main Power
PWB and Ballast PWB.
LX-P1010ZU/ZE
NO
Pull out the power code
and wait for approx. 10 minutes.
Plug in the power cord.
YES
Is there any sound of relay on?
NO
NG
(PA014) 24
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