I was thinking I might try to jumper voltages from the main power supply back to the other voltage points formerly served by the SMPS. Several of them are the same. I might be able to get most (all?) of them that way. Assuming the additional|
|04-02-2009||Do you know why the suffixes such as VA, VS, and VM are used for some of the voltages out of the SMPS?
e.g.: +5VA, +5.5VS, +12VM
Is it possible that those voltages do not use chassis ground... Instead they use an isolated ground? I notice there a|
|04-02-2009||If you have enough variable external power supplies you could probably "prove" all else is O.K.
If you combined, let's say (for testing purposes ONLY) the 12 volt supplies, the 5 & 5.5 together and combine the 2.5 & 3.5 and compromise t|
|04-02-2009||Possibly A= all time (Maybe analog)
D= delayed (or digital)|
Yes I agree... If I can come up with several supplies like you say, I could wire them in there even if some of them did have isolated grounds. I guess I'll get started on that.
It's unfortunate that Kenwood didn't make a schematic of th|
|05-02-2009||So the picture and sound come up then the set shuts down?|
|05-02-2009||Buy IC's from a reputable dealer. Read the convergence ic sticky.|
|05-02-2009||Or burnt out LCD display.|
|05-02-2009||Lowrey Organ||G'Day from Aussie land. My mum has a Lowrey Holiday D350 organ which is in need of a service. Does any one know where I could get one? 8)|
|05-02-2009||Organ or service?|
|05-02-2009||[quote:bafe81d127="fpc3"]Do you know why the suffixes such as VA, VS, and VM are used for some of the voltages out of the SMPS?
e.g.: +5VA, +5.5VS, +12VM
Is it possible that those voltages do not use chassis ground... Instead they use an isolated |
|05-02-2009||hitachi 53fdx01b||Finally found it. thanks for all your help. TV's working good now. Took a good time searching thru the signal board and located the empty spots for them. :D|
|05-02-2009||thanks vtech for the tip on the screw and ground lug. Interestingly, I had removed the mainboard to remove and check the caps that I suspected were leaking (they were fine). When I put it back in yesterday, I put just a couple of screws in the back to h|
|05-02-2009||Hitachi 55hdx62 no power to display||I have a Hitachi 55hdx62 plasma that died one day. I get no power from the power supply to feed the x sus and y sus board. When I turn the power on the green led for power on lights up in the front. But I get no power out to the sus boards. I have not fou|
|05-02-2009||Tevion MD 7123||Hi,
I was wondering if you would be able to assist me in getting a schematic diagram for the above widescreen 70cm TV.
Some components caused damage to the circuit board, and just need to find what needs to be replaced.
Many thanks in advance.
|05-02-2009||Thank you for the help! I've opened my TV and think I found the part. I'll confirm once I get the new one in the mail. The biggest issue I have is that the PCB is connected to other parts of the TV so I have not found a good set up that will allow me|
|05-02-2009||no no picture or sound as it wont power up it just stops on red standby light? if i try and power on or press on on remote it just stops on standby with red led.?
any ideas? power supply problem ?|
|05-02-2009||reply to justmanuals||Cheers Paul for replying. I will give it a try this evening.
|05-02-2009||Well, have replaced BU and fet again and the set is working as expected.
No faulty parts found (as much as I could test).
Found some old mica on the heater, this could be the curlpit.
After leaving the set on for 3-4 hours bu temperature is less than 5|
|05-02-2009||freeview||Thanks for the reply jts1957, but my neighbours r on satellite and cable only 2 r on freeview.|
|05-02-2009||Re: Anode cap||See:
|05-02-2009||I've obtained four DTV boxes. Two are different models from one company. I've experimented with three out of the four and they all work basicly alike. The biggest differences are features (guides, graphics, Timer, etc.).
The only channels I see a problem|
|05-02-2009||If you unplug the cables going to the front panel and speakers, you should have enough slack to slide the board out and tip it up to gain access to the botton to unsolder the IC. The IC should be an LA7837 or someting close to that (this is from memory).|
|05-02-2009||Tv Hitachi CMT2588, no color||I want to ask, and help me, what the problem the Tv Hitachi CMT2588 no color. Any one can help me....?|
|05-02-2009||my guess is that the smps for that TV has stopped functioning. The SMPS provides power for the remote operation as well as other funtions in the TV. In other words, when the TV is in standby, the SMPS is on and providing power to the remote control rece|
|05-02-2009||midas venice 160||hi guys
i have a midas venice 160 desk ,there main master fader is destorting and there is no output i have already change the fader but still same problem arise i would appretiate any help as i have strugle for alengthy period
|05-02-2009||Don't ya just love people who don't read earlier parts of a thread.
To reiterate for "guest Feb 05, 7:05am Dan" info (TDA8172):
|05-02-2009||Service manual||I need service manual of AFICIO 1500 .
Please! send it to me through my email:[email protected]
Thanks and best regards. :)|
|05-02-2009||Is Color control working?|
|05-02-2009||If the SMPS has totally stopped functioning...how do red lights obtain power?
Some sets have a seperate "standby" power supply and some sets use a portion of the main SMPS to supply "standby" voltage(s).|
|05-02-2009||Have you tried going to the source:
|05-02-2009||Thank JTS. Great point!
I was thinking it sounded similar to the receiver I am working on. In my case, the red LEDs flash as the SMPS attempts to function. I believe you are saying that since his are on solid, some portion of the SMPS or the standby|
|05-02-2009||standby red led light comes on and the volume, program up and down leds come on but it refuses to switch on.
was working perfect then just turned it on one day and there was nothing.|
|05-02-2009||sorry forgot to login on post above.
so any ideas guys? would this indicate something on the power supply blown?|
|05-02-2009||This Parts & Service manual can now be purchased for $11.77 and downloaded immediately after payment from http://www.justmanuals.com