Samsung 500MP display green power indicator light, no fault repair method of grating |
| Time£º2014-07-31 08:59:51 Source£ºNetwork Author£ºUnknown Clicks£º1403 |
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DM9service manual download site
4. The power supply circuit is normal. Power supply circuit consists of Q505, L501, D508, etc. L501 when triode Q505 conduction, the current linear increase; When Q505 cut-off, L501 has risen to a certain extent, the current pulse voltage on both ends of L501, then through D508 after rectification, C516 filter into a dc voltage to the T501, Q502 power supply. Replacement after the problem is still, should check the drive tube Q504 and pulse width modulation integrated block IC501 is normal.DM9service manual download site
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