CF19G22Chasís TAC9700.pdf [638.18kb]
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TVs
TV Toshina CL20121 Chassis TAC 9901 There are 26 and 12 v. It does not
184
hace 5 años
hace 5 años
I have tested after the god and resistance looking for 26 and 12 volts, but they do not appear, there are 150 of the + b, they reach pin 4 the 150 volts, the only voltages that appear are the 32 v of the tuner and the 5 volts of Eprom memory pin 8.
The 32v and 5 volts appear on the tuner. The 9 volts are missing.
+ B 150 volt capacitor.
I add toshiba diagram very similar all the elements of the power source match.
I would like to know how the 12 volt and 26 volt voltage generation is activated
I can help CF19G22Chasís TAC9700.pdf [638.18kb]
CF19G22Chasís TAC9700.pdf [638.18kb]
2.308
hace 5 años
suggestions. You remove the flyback and the hot. place a focus of 75 / 100w of the b + to ground .checa how much you have of b + .- you must have 134vcd. This is a very stable source, the Sanyo uses it, and we use it to make adaptations. If you have the 134vcd, we will check the oscillation, even if you do not have the flyback or the hot, I send you a vpp probe diagram. Regards. Felipe ascencio
hace 5 años
hace 5 años
Friend if the TV does not turn on you will never have the voltages of 12 and 26 because those voltages are delivered by the flyback, and the voltage of 150 volts in + B is very high, the correct voltage is 134 volts check the state of str and R811, regards.
184
hace 5 años
Check the resistance and it is fine, every indication that is the str or regulator, change the electrolytic capacitor from 10 uf to 160 volts, and the 150 volts continue to come out.
2.308
hace 5 años
-in pin 3/4 can not have 64VAC.- since that voltage comes from the bridge rectifier. .- 1.- how much is your vca line. 2.- connect your multimeter in vcd and place a tip on pin 3 and the other tip on pin 4, it has to have a voltage of 25vcd. .- 3 .- disconnect pin 4 which is the output and check how much voltage it has with the pin connected and with the pin disconnected.
184
hace 5 años
VCA line 117.8
Pin 3 and 4 11, .31 volts connected and disconnected measures me almost the same 11. 20v
2.308
hace 5 años
If the VCA line is 117VAC, the 117V multiples by 1.41 are 164VCD. These are what you have to have in filter C 810. - Place your voltmeter in c 448, and check how much voltage you have, then disconnect only pin 4, if it has no regulation, you can be certain that the regulator it does not work.
184
hace 5 años
Although last night the TV on gave image and sound, it was about 5 minutes on, and then it was paid only I have not been able to identify what is wrong, I replaced the resistor r811, the filter of 33 uf, to solve the area. But I can't turn it on.
Any other suggestions. Thank you
hace 5 años
I suggest that you measure in the continuity scale you must have a cracked track or false weld that you cannot detect with the naked eye.
184
hace 5 años
Thanks "Electronica" I'm going to clean the area with thiner, to do what you recommend. Thank you for your contribution
184
hace 5 años
hace 5 años
I managed to clean the circuit with thiner, then repair all the welds, and the TV is already working, I have it in test. I solve this issue. Thanks to the two partners who gave me a hand to help me through their repair guides
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