SAMSUNG - HLN-5065W - REPAIR HELP (2) PROJECTION TV

[2]                     SAMSUNG  HLN-5065W [PTV]

---------------------------------------------------------------------------------------------------------------
When the timer lamp and Abnormal Temperature LED indicators flicker simultaneously =>

• If the 3 LED indicators flicker from the time the set is turned ON >
• The CN106 connector on the DMD board is not inserted properly. 
• The MDR cable that connects the Digital board to the DMD board is not connected properly.

---------------------------------------------------------------------------------------------------------------

• If the lamp does not turn on even after turning it on 3 times, by power Off/On 15 seconds intervals >
• The +B 380V power is not supplied to the ballast.  Check whether the cable is not connected properly between the power and the ballast.
• The cable connected to the CN110 terminal on the DMD board and the CN2 terminal of the ballast short circuited or not properly connected.
• The lamp does not turn On because (5V) has not been supplied to the blue pin #1 on the CN2 terminal of the ballast.
• 5V is supplied to the CN2 terminal on the ballast, but the lamp does not turn On because of the ballast has a failure.  If the lamp is replaced and (5V) is supplied normally to the CN@ terminal  suspect the 'ballast failure' if lamp still does not turn On.
• The ballast is normal but the lamp does not turn On, even when the 5V is supplied normally to the CN2 terminal, and 385V to CN1, try replacing the lamp.  If it turns On means that the lamp is faulty.
• The color wheel engaged to engine does not operate or the connector which indicates the operation of the color wheel is not connected properly, and there fore does not allow the lamp to turn On.  The cause can be determined when the set still does not turn On after attempting to turn it On three times.
• Another digital board or DMD board has a failure.   Conclusively, if the three LED indicators flicker, first check the above items, then check the various connector connections, and then suspect a failure of  the lamp or the ballast.

----------------------------------------------------------------------------------------------------------------------

If the set is normal => 

• Means that the lamp is turned On normally.  Description of LED  indicator operations >

1. The lamp LED indicator flickers while turning On the lamp.
2. The mechanism is designed in such a way that if three turning-on trials; within 15 seconds of intervals between each trial; fail,  the set should be Powered Off, and then three turning-On trials should be tried again.

--------------------------------------------------------------------------------------------------------------------

Failure Name:  Failure if LED indicators are normal, but the screen is not displayed.

• Check whether the external LED indicator of the set is normal.  Only the Lamp Indicator should be turned On.
• Check whether the digital board LED indicators inside the set are lit:  All of the three LED indicators should be turned On.  Can observe those LED indicators through the cabinet holes at the back of the set.  All three LED indicators should be turned On.
• Check whether the set Lamp is turned On:  When the lamp is turned Off, replace it.  When turn On the set again after replacing the lamp, it should turn On within 30 seconds; for 50 and 61 inch TVs.  If more than one minute passes before it turns On, or it does not turn On, replace both ballast withing the engine and Lamp together.  

--------------------------------------------------------------------------------------------------------------------

Lamp replacement:  

1. Remove the lamp cover screw.
2. Remove the screws on both sides of the lamp.
3. Pull the lamp out by holding its knob, and then replace it with a new one.
4. Replace lamp cover and dcrew it firmly.

Ballast Operation Check:  

1. Open the back cover of the set, and short the protection switch. 
2. Check whether the Power and Lamp Enable signal have been supplied ot the Ballast.  
3. Check whether 5V is supplied to the Blue terminal of CN2.
4. Check whether DC380V is supplied to both end terminals of CN2.
5. If 5V is applied to the CN2 terminals of the ballast, but the lamp does not turn On, 'replace the ballast'.
6. When the 5V is not supplied, replace the first engine.  If the lamp still does not work, 'replace DMD' board attached to the engine.

Contd: