Question about Mitsubishi WS-65809 65" Rear Projection Television

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65809 and the light comes on for about 2 seconds and turns off.

I have checked resistor next to the power supply (47 ohm). I'm sure there must be other symptoms.

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Replace your power supply module

Posted on Sep 06, 2007

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Posted on Jan 02, 2017

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1 Answer

Can,t get it to turn on.


Does the red light come on? does it go green but no picture? Here are few possible solutions:

If you have no red light and you have a Megmeet MLT386 power supply, check these parts:

1) Swollen caps on the secondary circuit.
2) Blown fuse F1 (5A/250V) this is caused by a shorted FET at QA1 (20N60), you may also find that SMT cap CX23 is burned up (.001uf) which is in parallel with diode DA2 which may be damaged/shorted, replace these components.

If the power LED goes from red to green when powered up but no picture, then it might be lost +24VDC from the power supply:

3)Check fuse F2 (3.15A/250V, I put a 5A in), if it is blown, replace FET at QA2A (9N50C), replace QA2 as well (9N50C). Check SMT resistors at R233,R234,R235,R236 (.47 ohm). If open, replace with .1 ohm 1W or 2W resistor (easier to source). Also replace SMT transistor QF1 (2X4 or 2N4401 NPN transistor). And replace diodes at DS2 and DS1 (HER207), DS2 was shorted, DS1 was ok but I replaced it anyway.

I dont know as much about the Megmeet MLT169A, but it has similar problems and similar components.

4) I had to replace all of the capacitors in the secondary circuit (there are six in a 3x3 row marked EC9 (1000uf35V),EC10(1000uf35V),EC14(470uf35V) and EC18,EC19,EC20 (all 1000uf35V).

Sep 05, 2009 | Akai LCT3201TD 32 in. LCD Television

1 Answer

Panasonic T.V. model number PT-47WX42F no picture or sound


R800 open on power board next to the relay.the resistor value is1.5 ohms 10 watt resistor.

Jul 15, 2009 | Panasonic PT-47WX42 47" Rear Projection...

3 Answers

My mitsubishi ws-65809 will not power up.


Mine is doing the same thing. I just talked to the repair guy. It is a power supply problem. Try unplugging it for 5 minutes and turning it back on. Also if you were having problem with any picture issues it is the convergance, and that requires chip replacement. They are estimating $350.00 to replace the power supply.

Jan 02, 2009 | Mitsubishi WS-65809 65" Rear Projection...

1 Answer

TV will not turn on


Replace shorted Q431,can use a 2sc3998, open r448 .47ohm resistor. after you get set on beware of convergence ic's may have been shorted causing all the problems.Check r859 &r858 .47 ohm 1 wtt that supply - &+ 20 volts to convergence packs, if open replace packs & check low ohm resistors on convergence ,I found r2144 &r2145 open replaced & all systems go "good luck"

Dec 26, 2008 | Akai PT5598HD 55" Rear Projection...

1 Answer

Onkyo TX-DS494 stereo receiver won't turn on.


First, check which type of protect first.

Symptoms:
3 seconds (DC protect) OR immediately shut down (Over Current protect)

How to confirm?
1.Unplug the amp.
2.Remove the metal cover.
3.You will see a long vertically installed pre-amp board mounted next to those large power transistors fixed by 12 screws on a large aluminium heat sink.
4.Remove this long vertically installed board mounted by 2 screws.
5.With 2 screws removed, just pulling this board out and hold it with one hand.
6.Plug the amp and switch it on.
7.If your amp stays ON forever, the problem is from this long board.
8.If switch off at once, the problem is from power amp board.
Try the above- mentioned steps. If DC protect, write an email to me via searching you tube SR600 capacitor replacement. Don't be afraid.
So many people wrote to me.

If over-current protect do the
following steps
(O)unplug the amp.
(1)download DS-TX494 service manual.
(2)open the amp metal cover.
(3)measure 7 large white resistors resistance loacated next to power transistors mounted on a large heat sink with black probe touching the middle pin and red probe to first/left or third/right pin.
(4)If this 3 Pins large white colour 0.22ohm x 2 resistor is open with infinity ohms ,
(5)replace it and jot down this channel for example left surround faulty. Usually only 1 channel went faulty.
(5a)When the white resistor didn't burn, "2 channels" were damaged due to bad soldering joint of the large white resistor, however.
(5b)When this happened, time taken of shut-down due to over-current is 3 seconds NOT immediately.
(6)the two large power transistors next to this white resistor 0.22 ohms x2 should also be replaced.
(7)plug the amp
(8)switch it on
(9)if ok, troubleshooting get done
(10)if not ok
(11)replace ALL the components of this power amp channel.
(12)pre-amp section no need to check.
remember if not OK, the replaced 0.22ohm x 2 resistor and 2 power transistors maybe shorted again. Check them first. If OK, replace ALL Components in this channel except 0.22 ohm x 2 and 2 transistors. 0.22 ohm x 2 means left and middle pin 0.22 ohm as well as right and middle pin also 0.22 ohm that are 2 pieces of resistors with 0.22 ohm in a large white 3 pins resistor.
Remember sometimes the
0.22 ohm white resistor is normal. If so, use a digital multimeter to measure the be bias transistor voltage via multimeter diode test function. You can compare the normal value,580mV to 650mV with faulty one,3.2mV. And the CE resistance is 1.8ohms only instead of 3 Mega ohms.

635a346f-06d4-484f-8cf9-097f9cad08bb.jpg


power amp-fkn3yornxvv0r5asupq1xmgq-3-2.jpg

Jan 09, 2018 | Onkyo TX-DS494 Receiver

1 Answer

AKAI PDP4225M HAS RED LIGHT BUT WILL NOT POWER ON.


this is because R001 is not 5.6 ohms, it's 560K ohms

Nov 10, 2008 | Akai PDP4225M 42 in. Plasma Television

1 Answer

Toshiba tw40f80, replaced both convergence ic's, power light still blinks


Solder yoke plug and vertical IC connections.....try again.
Let me know.....T.

BTW....Tosh recommends STK-392-110's replace with -110T's
Toshiba OEM.....then there is no question about resistor value
change......

Aug 03, 2008 | Toshiba TW40F80 40" Rear Projection...

2 Answers

Service shop


Is the power supply completely dead ? If so with this model of power supply its very common for the resistor 3318 on power supply to go out. Causing the power supply to completely die. Take out the resistor 3318 its a 470 Ohm 1W resistor. check it if it doesn't read around 430-530 Ohm Its gonna be bad ( most likely ith will read in the mega ohms. Replace with a 470 Ohm 2 W resistor. Also check power supply for cracks

Apr 29, 2008 | Philips 37PF7320A 37 in. HD-Ready LCD...

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