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hi, my tv is cutting off on its own and it wont turn back on unless i reset the main power
Problem for Pioneer SD-533HD5 53 in. Rear Projection HDTV Television
Pioneer projection TV- hard time starting, shuts off at times.
Hi, I recently inherited a non-working Pioneer SD-533HD5 projection TV, built Dec. 02. Initially, it would not turn on at all, but I found and replaced an open 5 amp fuse.
When I push the power button, the TV will try to start- the green light will come on for a second then turn red again. After I do this 5 or 6 times, the green light will stay on and the TV will work properly with a decent picture. After an indefinite time, if there is a particularly bright scene that comes up on the screen, the TV will turn itself off, then back on right away. Sometimes this may be accompanied by a green flash on the screen. After it turns itself back on, it'll work fine until another bright scene comes up again on whatever show I'm watching.
I removed and inspected the power supply board and resoldered a bunch of questionable joints, but it didn't make much difference.
What else should I do?
Thanks,
Dave
When I push the power button, the TV will try to start- the green light will come on for a second then turn red again. After I do this 5 or 6 times, the green light will stay on and the TV will work properly with a decent picture. After an indefinite time, if there is a particularly bright scene that comes up on the screen, the TV will turn itself off, then back on right away. Sometimes this may be accompanied by a green flash on the screen. After it turns itself back on, it'll work fine until another bright scene comes up again on whatever show I'm watching.
I removed and inspected the power supply board and resoldered a bunch of questionable joints, but it didn't make much difference.
What else should I do?
Thanks,
Dave
Comments:
Sep 03, 2009
- Thanks for the quick reply. I am having trouble seeing any capacitors that have damage- is there any other way to diagnose them? And here's a dumb question: is the "deflection section" the area where the convergence ICs are located? I will remove whichever board is necessary again to have a better look.Thanks,
Dave
Solution #1
posted on Aug 31, 2009
Sounds TV has few weak/dry/leaky electrolytic capacitors in circuit.
Check and find out electrolytic capacitors that are leaky or top is bulged or their plastic jacket/ cover seems shrink in power supply board and main board of TV specially in deflection section, replace them with same value and working volts that are written on those bad capacitors.
Hope that will solve TV problem.
Thanks.
Check and find out electrolytic capacitors that are leaky or top is bulged or their plastic jacket/ cover seems shrink in power supply board and main board of TV specially in deflection section, replace them with same value and working volts that are written on those bad capacitors.
Hope that will solve TV problem.
Thanks.
Solution #2
posted on Sep 03, 2009
hi,
have a friend assist you measuring the output voltages of the
power supply
have it noted:
a) when you plug the unit
b) when the unit is on
c) when the unit is turning off
might also be better wiring 2 insulated wires, if only possible
on the capacitors that have 160V rating, secondary side of the
power supply.
please unplug the unit when doing solder work.
try also to check for cold solder on the flyback pins,
resolder it to be sure, use a good quality soldering lead.
hope this helps initially, thanks for using Fixya!
you have mentioned:
"I removed and inspected the power supply board and resoldered a bunch of questionable joints, but it didn't make much difference."
we will focus our attention first on the power supply board you are talking., and that part is i'm
pertaining about. measuring the output voltages.
the TV have vertical and horizontal deflection circuits.
the convergence IC you are asking about works only when horizontal deflection circuits is
running.,
without the necessary voltages on the horizontal deflection circuits your convergence circuits
will not work.
ABL - automatic brightness limiter
it might just be a resistor coming fro the B+ , which is feed to the ABL circuit of the flyback
these resistor might have change value.
have a friend assist you measuring the output voltages of the
power supply
have it noted:
a) when you plug the unit
b) when the unit is on
c) when the unit is turning off
might also be better wiring 2 insulated wires, if only possible
on the capacitors that have 160V rating, secondary side of the
power supply.
please unplug the unit when doing solder work.
try also to check for cold solder on the flyback pins,
resolder it to be sure, use a good quality soldering lead.
hope this helps initially, thanks for using Fixya!
Comments:
Sep 03, 2009
- hi, againyou have mentioned:
"I removed and inspected the power supply board and resoldered a bunch of questionable joints, but it didn't make much difference."
we will focus our attention first on the power supply board you are talking., and that part is i'm
pertaining about. measuring the output voltages.
the TV have vertical and horizontal deflection circuits.
the convergence IC you are asking about works only when horizontal deflection circuits is
running.,
without the necessary voltages on the horizontal deflection circuits your convergence circuits
will not work.
Sep 22, 2009
- the problem of your TV is on the ABL circuits on the deflection boardABL - automatic brightness limiter
it might just be a resistor coming fro the B+ , which is feed to the ABL circuit of the flyback
these resistor might have change value.
Oct 08, 2009
- these can be best explained and pointed if you have the service manual you might get it with a fee., been trying to look for free one , but still unluckyPopular Solutions for Pioneer SD-533HD5 53 in. Rear
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