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TVs
TV Daewoo does not turn on
Televisor Daewoo DTQ-29S4SC
Televisor Daewoo DTQ-29S4SC
9 Soluciones
19 Reparaciones
36
hace 5 años
hace 5 años
Good evening friends of YOREPARO, I have a TV daewoo model DTQ-29S4SC chassis CN-011N does not turn on the + B has a voltage of 25v when I remove thisistor X0202 it reaches 145v but I can not find such a replacement some colleague could tell me what its replacement
9.501
hace 5 años
friend are you sure that the thyristor is damaged ... iguel I leave you a replacement x if you want to replace it ... ) ... looking straight ahead with the terminals at the bottom of the left is the 1st cathode ... the 2 is the gate ... and the last one on the right is the anode ... I leave a link with information of the same...
http://pdf1.alldatasheet.es/datasheet-pdf/view/77380/SEMTECH/MCR100-8.html..... comment if it was useful to you ... greetings !!
47.894
hace 5 años
hace 5 años
[i] Let's see, if installing this I805 (Thyristor) on the circuit again but disconnecting pin 2: + B of the FBT (Fly Back Transformer) and making a "bridge" between Q806 CE: KTC3198Y, you get that The + B also increases above the initial 25V (Stand By), so this Thyristor is not defective.
Install a filament lamp (bulb or incandescent bulb) on C403: 100uF / 160V, to verify if the + B is stabilized at 133V, if this Switching Source (SMPS) is not achieved, it must be repaired. In the first instance, check that the I802 Error Amplifier: DP133 is not defective.
Now, if in that test with lamp you get a + B of 133V, then the source is OK and you should check the protection circuit "OCP" (Over Current Protect), under normal operating conditions there should be no voltage on the C of Q801: KTC968AY, if any trace of voltage appears, then check that this transistor does not "leak" and that it is not "overrated" R810: 0.39Ω 1W, because an increase of a few tenths of Ohm is sufficient to activate the System of Protection and inhibit ignition.
Regards!
Joansoler. [/I]
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