I generally don't use the bulb so perhaps Vincerogers69 can answer.
If it's falling to 63V then I assume it's at 323V prior to connecting PS_ON.
Connecting PS_ON then drops the voltage to 63V so the PFC circuit must be switching on because current is flowing through the lamp and dropping most of the voltage across the lamp which then becomes brighter.
I would with caution remove the lamp, replace the fuse and try again and hope everything is OK. The voltage at the capacitor should rise when PS_ON is connected.
You may wish to wait to hear from Vincerogers69 before trying.
i would try it now with out the bulb tester as you have your five volts standby etc i usually find if theres a short circuit the bulb lights full brightness straight away.
with no short the bulb should just barley glow if thats the case i usually remove the bulb replace the fuse and power on.
Last edited by vinceroger69; 11-20-2016, 06:44 AM.
i would try it now with out the bulb tester as you have your five volts standby etc i usually find if theres a short circuit the bulb lights full brightness straight away.
Im still learning myself but using a dim bulb tester does seem to save parts if you have missed a faulty item maybe budm will confirm the bulb wattage we should be using and what to expect as in bulb brightness etc under diffrent circumstances.
for future refrence ive just saw this post tom66 wrote about using a dim bulb tester
The lamp glowing indicates current is being drawn.
Once the lamp goes out, very little current is being drawn.
If there was a short, the lamp would be on continiously. So it should be OK.
Most power supplies will do one of several things:
- The lamp may flash or flicker
- The lamp may glow once then go out once the main capacitor has charged up.
- The lamp may glow dimly and the TV may operate (usually smaller TVs will run with a 100W bulb, larger ones may not work or may require a much larger bulb, 150-200W or so)
Now there is one exception, if the TV has a relay on the power board which may turn off, there could be a short beyond this relay. If there is a relay, you want to find some way to keep it on continuously.
so it depends how bright the bulb was glowing maybe something else was still short? its hard when we cant see things ourselves as in how bright the bulb is etc
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