Panasonic TC-2185 (M15 core) type color TV power indicator light will light up, "and" a sound machine, a fault repair method of three |
| Time£º2014-07-04 07:54:03 Source£ºNetwork Author£ºUnknown Clicks£º1244 |
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hpnservice manual download site
hpnservice manual download site
When measured, filament light IC601 (42) foot voltage of 8.71 v, dies at about 2 v. Disconnect after R536, found no longer after filament light the flame, and grating to appear on the screen, the rapid measurement of each testing point voltage protection are not normal, and further measured Q504b just boot to 0 V voltage, and then gradually rose to (1.7 Vo considering Q503, Q504 each voltage contain each other, it is difficult to judge which one is the forerunner, decided to disconnect method to judge the fault source. Disconnect Q451b extremely, fault; still disconnect D502 one feet, fault; still disconnect D522 machine no longer after a foot protection, measuring D522 direction, resistance are normal. Remove the D520, Q503, Q504 inspection, no exception, its recovery after it no longer protect! Flip floor look carefully, found near Q504, Q503 there are stains on board. The stains come from? Where is the electrolytic capacitor leakage? Look around C580, C530, C525, C452 electrolytic capacitor, such as found C580 (100 mu F / 6.3 V) a foot of green mold, damage undoubtedly. With anhydrous alcohol cleaning besmirch, blow dry, with a 100 mu F / 16 V capacitance will C580 replacement, damp and rainy season, the fault does not recur.hpnservice manual download site
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