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| gary |
 Posted: Tue Apr 18, 2006 4:24 pm Post subject: Re: What means THP651 |
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| Neo wrote: |
| I`m working on the power supply of a TV Sony and in the diagram and Board it`s written THP651, it`s a little black box with three terminals and I don`t know what is it? Somebody know? |
it is probably the degauss thermistor which is used to remove any stray magnetic field variations round the crt, that is the loud buzzing noise you heere briefly at startup. cant be sure without knowing tv model no. |
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| Guest |
| Posted: Sat Apr 15, 2006 4:47 pm Post subject: |
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What do you mean by the power transformer?
The primary ground needs to be isolated from the secondary ground for safety reasons. Make sure you are measuring from the correct ground on a component. Most heatsinks are not at ground potential.
There should be nearly 320 Volts dc across the mains capacitor, if not check the bridge rectifier. |
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| Neo |
| Posted: Sat Apr 15, 2006 1:16 pm Post subject: What means THP651 |
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| I`m working on the power supply of a TV Sony and in the diagram and Board it`s written THP651, it`s a little black box with three terminals and I don`t know what is it? Somebody know? |
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| Bigaltoo |
| Posted: Tue Aug 10, 2004 5:58 pm Post subject: Sony TV Model KP-53XBR35 Power Supply problems |
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Have been troubleshooting captioned for several hours. All DC voltages are either low or zero. Cannot locate short. Power transformer primary voltage is 62 AC which seems low.
Haven't serviced TV's in several years. Schematic states all voltages taken from ground unless noted to contrary. Primary and secondary seem to have separate grounds although symbols the same (????). Advice and suggestions please. Cordially, Alan |
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