|28-09-2012||philips Lc 7.2e||Hello i have a philips Lc 7.2e chassis and the problem is that sudently i have blur picture,
like the old CRT TV use to have when the tube (screen ) have problem.
Any sugestion or help?|
|29-09-2012||KR-A4030 intermittent sound both channels||Can someone help?
My KR-A4030 has an annoying intermittent loss of sound in both channels. It's not a contact fault. When I touch one the first amplifiers transistors (Q301-Q304) it's like some current is injected and it returns to work fine. After some |
|30-09-2012||Kenwood KR-A4030 intermittent sound both channels||Can someone help?
My KR-A4030 has an annoying intermittent loss of sound in both channels, but mostly in the right one. It's not a contact fault. When I touch a finger in the terminals of one of the first amplifiers transistors (Q301-Q304) it's like some|
|30-09-2012||I am not sure if "touching transistors" would tell you a whole lot?
Strictly working out of memory; how about goosing the volume control?
Does it have the same effect when the problem occurs?
I seemed to recall something about the dirty volum|
Thank you very much for your the help.
The first thing I've thought to blame was the volume control. But it's not.
When I touch the circuit after the volume control I inject 60Hz noise. I here the HUMMM and one or both amplifiers return to s|
Thanks to you I have found the problem.
Trying to find the diagram for 5030 instead I came across another forum where someone had the same problem for the 5030.
And the cause is very simple: bad contact inside the relay of output stage!
Glad you got it. Persistence pays.|
|01-10-2012||check mosfets||check the pair of power mosfets near the fuse. 8 pin chips, 4 legs on one side tied together on the board, 3 pins on the other side together. the last pin is control. just ohm it like a transistor and you will quickly see if you have a shorted one.
|01-10-2012||onida no sound||onida 21" picture is very well. but no sound|
|01-10-2012||how to reset bios phoenix notbios4.0 password||Hello
I have a sony VGN-FE28H requiring ENTER PASSWORD. I disconnected the battery but nothing. if there's really an alternative
I'm looking solution to reset bios password. What is the eeprom data to the stock bios.
And how to reset the bios pas|
|01-10-2012||minnie||help repair my changhong no power but when i remove the suply of flyback 130v power light is on|