Question about Mitsubishi WD-57731 57" Projection HDTV
In the last 3 days my HDTV picture shuts off suddenly with no warning. The red light comes on steady. After 3 minutes it will start up again and everything appears OK. This has happened 6 times so far. The bulb was replaced under warranty already 10 months after purchase. Can't picture it being a bulb problem since it has a great picture once it comes on again. Any ideas?
There is a list of things you need to check, but offhand I'd say that the 5 volt line is low and probably right on the"edge", which is why it works sometimes and not others take a look at this list:
1. (Lamp may light and go out) suspect bad lamp part # 915P020010 2. Check for
12-volts DC at J-9 connector pin 4 on the Engine Driver PCB, if missing check
for an open F9A09 on the Power PCB, if it is open replace F9A09 part #
283P127060 and the Light Engine part # 939P977010 3. (Lamp may light and go out)
Check for 5-volts DC at J-9 connector pin 1 and 2 on the Engine Driver PCB if
low or missing check C9A37 and C9A38 both 3300 UFD 10 V part # 181P732040 on the
Power PCB (part # 930B921002) 4. At power on the lamp turns on and off three
times and then the unit shuts down with a red lamp LED (lamp error). Replace the
Light Engine part # 939P977010 5. Lamp enable line at J14 pin 6 does not switch
to 5 volts after turn on, 12 and 5 volt supplies are good. Suspect the Light
Engine part # 939P977010 6. Lamp enable line at connector J14 pin 6 on the
Engine Driver PCB switches to 5 volts after turn on and does go to 0-volts (low)
after 5 seconds, 12 and 5 volt supplies are good. Suspect the Lamp Power PCB
(ballast) part # 939P978010 7. Lamp enable line at connector J14 pin 6 on the
Engine Driver PCB switches to 5 volts after turn on but does not go back to 0-
volts (low) after 5 seconds, 12 and 5 volt supplies are good. Suspect the Light
Engine part # 939P977010
I would say try #3 first, the two caps on the pwer supply board. A couple of warnings: as always, unplug the unit before servicing. The power supply is located on the left side, if you behind the unit. It is in a shielded box and the shield has VERY SHARP EDGES so use care when you try to open it or you will slice your fingers.
Please be sure to rate this solution. Thanks!
Posted on Nov 08, 2008
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Nov 18, 2015 | Sony BRAVIA KDL-46W3000 Television
Sep 25, 2014 | Mitsubishi WD-60737 60 in. HDTV
Apr 03, 2010 | Sony KP-53HS30 53" Rear Projection...
Jan 13, 2010 | Toshiba 62HM95 62" DLP HDTV
Sep 12, 2009 | Mitsubishi WD-Y57 57" Projection HDTV
May 09, 2009 | Sony Grand WEGA KF50WE610 50" Rear...
Jan 06, 2009 | Sony KP-46WT520 46" Rear Projection...
Nov 03, 2008 | Panasonic PT-52LCX65 44" HDTV
Jun 08, 2008 | Hitachi 70VS810 70" Rear Projection HDTV
Dec 20, 2013 | Mitsubishi WD-57731 57" Projection HDTV
270 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: