Service Manual Transistor Technical Articles CD Download Register Member Login Exit Sign
Home A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
. TV  .  Camera  .  Video camera  .  Notebook  .  Audio  .  Monitor  .  Projector  .  Air conditioning  .  Refrigerator  .  Printer  .  Duplicator  .  Fax machine  .  Mobile  .  Telephone  .  Washing machine  .  Cooker  .  Microwave  .  Other  .  
Your current location£ºHome > Technical Articles > Other

Samsung 788DF color power, without any reaction, indicating lamp does not light the maintenance method

Time£º2014-08-14 09:51:59  Source£ºNetwork  Author£ºUnknown  Clicks£º1310
  

The machine for the 17-inch flat-screen sc-reens, power is the core component thick film ICDP904C, the appended drawings is according to the physical part of power supply circuit z52service manual download site
 z52service manual download site
As fuse in good condition, and electric logging C605 on both ends of the voltage of 310 v (I mains in around 240 v) normal, measuring T601 subprime each are no voltage output, obviously fault in power supply section. Measured again IC601 power end voltage of 0 v (abnormal), (3) feet suspected damage of thick film blocks DP904C of power shutdown (3) feet over the ground resistance measurement for 4 Ω, short circuit state, with a hollow needle with electric disconnect DP904C (3) after foot, ZD601 negative still dark short circuit to ground state, failure is nothing to do with IC601. So doubt stabilivolt ZD601 breakdown, or filter capacitor C606, C607 has serious leakage, by observing two capacitance appearance in good condition, considering ZD601 damage probability, remove the ZD601 its positive and negative to just 3.5 Ω resistance value, breakdown, has been completely replace with a 33 v voltage regulator tube, and welded good IC (3) feet. And an electrical commissioning power, troubleshooting. z52service manual download site
 z52service manual download site
 z52service manual download site
Note: the power when no vibration power should to C605 after discharge.z52service manual download site