[TechAssist] Re: Samsung HLN5065WX/XAA No Picture after Bulb& Ballast replaced
- From: "Corey Brazell" <cohbraz@xxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 15 Sep 2005 22:42:21 -0400
The color wheel and fans are supposed to come up and run before the
lamp/ballast is activated. If the fans are running, look at the color wheel.
If you see that the color wheel is not running, that means that it is not
the ballast or lamp causing the problem. The color wheel drive voltage can
be found at connector CN110 on the DMD board, pin 4. If that signal is
present, replace the color wheel. If that signal is not present, but the
fans are running, replace the DMD board. If the fans are not running, look
on the digital board. It has 3 LEDs. They are, from left to right, 5v
standby, Digital 5v switched, Fan 7v switched. If any of them are not
lighting up when you try to turn the set on, you probably have a power
supply problem. Look at the SMPS solder connections. I have had only one
SMPS go bad, and it was not supplying correct voltages on the Digital 5v and
Fan 7v lines. You could also have a color wheel or DMD board problem. Either
of those can cause no startup.
Good Luck!
Corey Brazell
Audio Video Electronics
12169 SC Hwy 121
Newberry SC 29108
----- Original Message -----
From: "Tim Poole" <tdp13158@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, September 15, 2005 9:57 PM
Subject: [TechAssist] Samsung HLN5065WX/XAA No Picture after Bulb& Ballast
replaced
>I replaced the bulb and ballast with Philips upgrade and the set came on
>with normal picture. I then tried to reset the timer lamp by entering
>service mode and the lamp would not start up again no matter how many times
>I tried. I took it apart and realized the color wheel was not starting so I
>manually tried starting it with no change. I checked voltages to ballast
>and both 5v and 138v checked ok. I suspected bad ballast and got another
>one with same results- initially starts up then will not come back on after
>shut down. The customer said it was very tempermental and would not always
>come on before the bulb finally blew. Lamp led blinks then cycles on and
>off three times with sound then shuts off. Anyone seen this? Any help would
>be appreciated. Thanks, Tim
> Tim Poole tdp13158@xxxxxxxxxxx
> dba A-Mobile TV Shop & Precision TV Service
> Fredericktown, Ohio 43019
>
> 419-756-3443
> 740-694-8585
> fax 740-694-1032
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