Re: Goodmans TV does not respond to the TV remote


"ian field" <gangprobing.alien@xxxxxxxxxxxx> wrote in message
news:TXNxm.410827$bU2.403825@xxxxxxxxxxxxxxxx

The symptoms described certainly sound like a PSU/caps problem, just to
put the OP's mind at rest concerning the remote, the IRLED can be
observed in action with any digital camera that has an LCD panel.

An extra comment on PSU caps, not all faulty caps bulge when they fail -
some just get moderately hot. If the OP doesn't have an ESR meter the
touch test might identify a failing electrolytic. But it is important to
remember that the cans are not isolated, so don't touch the cans with the
PSU powered, and as capacitors can hold a dangerous charge, do the touch
test with one hand in pocket so a circuit through the body can't be
completed.

An idea for a poor man's ESR checker, is an inverse-parallel pair of LEDs
in series with a DC blocking capacitor, the idea being that a large
ripple on an electrolytic will look like AC to the DC blocking cap and
pass enough current to light the LEDs. A series resistor of about 1k2 to
limit switch on surge is a good idea, the cap could be about 0.68uF/400V
to cover most eventualities.

Testing is a little time consuming as the PSU needs to be powered down
between each test - the tester is soldered to the print side under each
electrolytic in turn. One of the LEDs will flash once at switch on, if
both then glow there is excessive ripple on the electrolytic.




"Wild_Bill" <wb_wildbill@xxxxxxxxxxxxxx> wrote in message
news:Zg1ym.1713$yi2.56@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Almost any video camera will be sensitive to the infrared of a remote
control. A camcorder with LCD display is most convenient since the display
is integral, so one doesn't need to set up a camera and separate monitor.

--
Cheers,
WB
.............


A mobile phone that everyone has in their pocket, is even more convenient
....

Arfa


.

Relevant Pages

  • Re: [Not home built] Old Gateway PC freezing
    ... The only _serious_ issue with the original 145W mini ATX PSU (apart ... keen on just simply replacing it with a spare SFF style 270W ATX PSU I ... The bad caps ...
    (uk.comp.homebuilt)
  • Re: Gateway E4000 will not turn on
    ... I suspect a bad power supply, but the fact the LEDs light makes me ... This is no common power supply either, ... If another PSU ... that extra 4 pin connector I mentioned is on all P4 ...
    (sci.electronics.design)
  • Re: Gateway E4000 will not turn on
    ... I suspect a bad power supply, but the fact the LEDs light makes me ... This is no common power supply either, ... If another PSU ... that extra 4 pin connector I mentioned is on all P4 ...
    (sci.electronics.design)
  • Re: Very strange standard voltage regulator behaviour
    ... > Perhaps you used the wrong regulator puppet in your layout, ... the 220nF bypass caps, surrounding the voltage regs. ... increased over time until the psu was overloaded. ... caps and put them back in the labs component inventory. ...
    (sci.electronics.design)
  • Re: Humax F2FOXT dead?
    ... caps on the PSU board: Black, 105°C types made by SamYoung in Korea. ... I'll try C10 first, then I'll change C12. ... you must use low ESR high temperature types. ...
    (uk.tech.digital-tv)