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[TV] Re: Mitshubishi WS-B55 green LED just blinks
You most likely have a bad ceramic (yes, ceramic) cap across the 12V supply
in the DM power supply.
Doug Miner
Chestnut County Electronics
180 Londonderry Turnpike
Hooksett, NH 03106
ccei@xxxxxxxxxxx
603-622-5400
-----Original Message-----
From: tv-bounce@xxxxxxxxxxxxxxx [mailto:tv-bounce@xxxxxxxxxxxxxxx] On Behalf
Of Tony Hubbard
Sent: Friday, April 03, 2009 11:22 AM
To: tv@xxxxxxxxxxxxxxx
Subject: [TV] Re: Mitshubishi WS-B55 green LED just blinks
Updated if unplug it and plug it in sometimes it will come om fine
Tony
On Thu, Apr 2, 2009 at 3:32 PM, Tony Hubbard <tvtech1969@xxxxxxxxx> wrote:
> I don't think it stopped blinking after 70 seconds in the customers home I
> have the chassis in the shop now I did not bring in the key pad. A funny
> thing happened though I put a light bulb across ed the main power supply
> relay to see if the secondary voltages would come up and no voltages were
> there then I took the lamp out and plugged the AC back in and the set
> powered itself on after a minute and the picture is ok, so I disconnected
> the AC again and waited a minute and reconnected it waited 60 seconds and
> turned it on and it came on.
>
> Tony
>
> On Mon, Mar 2, 2009 at 3:01 PM, Jeff Ostroff <stroff@xxxxxxxxxxxx>wrote:
>
>>
>> Hi Tony, I've done a few of those that needed the E2P PCB inside the DM
>> module along with the caps.
>> Does it stop blinking after 70 sec. of plug in?
>> Check for +5V on pins 4&5 of the RF connector on signal PCB if none or
low
>> try and unplug the front panel switch board.
>> If +5V is good suspect the E2P PCB their cheap.
>>
>> Jeff Ostroff
>> A-V Electronic Service
>> Sedona, AZ 86351
>> www.avelec.com
>> ----- Original Message -----
>> From: "Tony Hubbard" <tvtech1969@xxxxxxxxx>
>> To: <tv@xxxxxxxxxxxxxxx>
>> Sent: Thursday, April 02, 2009 9:28 AM
>> Subject: [TV] Re: Mitshubishi WS-B55 green LED just blinks
>>
>>
>> >
>> > The diodes don't check shorted and the voltages on the plug connectors
>> check
>> > good the ones that are marked anyway. The customer said it just went
off
>> > when she used the volume down on the remote. Any other help would be
>> > appreciated.
>> > Tony
>> >
>> >
>> >
>> > On Wed, Apr 1, 2009 at 1:33 PM, <Eric7828@xxxxxxx> wrote:
>> >
>> >>
>> >> I found this:
>> >>
>> >> Symptom: Timer Led Won'T Stop Blinking Even After Changing All Seven
>> Caps
>> >> On
>> >> The Dm Power Board. (None Of Them Were Puffed But All Were Bad).
>> >>
>> >> Cause: Q9b01 (8 Pin Ic) Is Shorted On The Dm Power Bd. This Makes
D9b00
>> >> And
>> >> Zener D9b04 Look Shorted But Are Not.
>> >>
>> >> Fix: Either Replace The Ic (Fairchild FDS6680A) Or The Dm Power Board.
>> >>
>> >> Eric,
>> >> Rick Electronics in NYC
>> >>
>> >>
>> >> In a message dated 4/1/2009 1:26:28 P.M. Eastern Daylight Time,
>> >> tvtech1969@xxxxxxxxx writes:
>> >>
>> >>
>> >> Mitshubshi WS-B55 Green LED just blinks I replaced the 7 1000mf 16v
>> >> capacitors in the DM power board and it still won't power up. I know
>> that
>> >> when you plug in the AC cord you have to wait 80 seconds before you
>> can
>> >> turn
>> >> it on but still no good. Any help would be appreciated.
>> >> Tony's TV Repair
>> >>
>> >> Tony
>> >>
>> >>
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