Dicas Reparação
Modelo - Chassis V25
Pesquisa: V25 Enviar Dica Resolvida
Resultados 289
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| LG | 32LV2500 | Parada | Ao ligar a TV apaga o stand by arma o relé e desliga.capacitor em curto na saída de áudio c528 ou c520 matando osso. 12 voltes da fonte | Cabeça | |
| LG | 32LV2500 | Tv standby piscando não liga | Capacitores grandes na saída de som em curto. | Rivaldo | |
| LG | 32LV2500 | nao liga led apagado | capacitores 453+456 na placa principal perto da l2 | retirar os cap. eir para o abraço | rn eletronica fortaleza ce |
| LG | 19LV2500 | pisca standby e não inicia, não acende leds e desliga | bga principal | feito o reflow funcionou normalmente. equipamento barato, não da para cobrar muito | trovarelli bauru |
| LG | 32LV2500 | Acende LED vermelho, passa a verde e desliga | Q202 na fonte com defeito | Marco Souza SP | |
| LG | LG-DV256K | Falhava ao tocar disco de cd e dvd (os discos executavam porém engasgando), as vezes dava uns trancos na unidade óptica e disco ao abrir a gaveta saia girando. | C121 1000uF/10V , C123 1000uF/16V e motor spindle (motor que gira o disco disco). | Trocar componentes citados em causa. | edcomp@ig.com.br |
| LG | DV256K | Não lê CD e DVD e fica dando uns trancos na unidade óptica. | C121 1000uF/10V e C123 1000uF/16V | edcomp@ig.com.br | |
| Sony | KP53V25 RA1 | NO TURN ON | KP53V25 Unit will not turn on. Shorting the Emitter and base of highvoltage output allows the h. drive to appear at the collector of the h. driver transistor. Update: unit had bad flyback. Anode lead will not come out of flyback. Must replace lead link fro | Anode 1-900-211-34 short link for anode lead | Muller |
| Sony | KP61V25 RA1 | DEAD | KP61V25 serial 9001930 Dead | Unit has no high voltage. ""E"" board is wet from glycol coolant leak from the Red and Blue CRT's that are leaking Red an Blue tube "" | Muller |
| Sony | KV27V25 AA-2 | system control | Unit has intermittent snow in the picture. 8-598340-20 tuner was replaced. Now the set has a symptom where the remote control causes the set to enter the video input mode when the channel is selected. Also the set will enter the video input mode if another brand of remote that operates a stereo receiver is used. | I instructed the tech to enter the tech mode and set the ID codes...ID0=25, ID1=23, ID2=47, ID3=0, ID4=27,ID5=135, ID6=1, ID7=0 . Write these in memory, then press ""8"" ""Enter"" to initialize. "" | Muller |
| Sony | KV32V25 AA-2 | retrace lines | KV32V25 serial 7019547. Unit has bright screen with retrace lines then shuts down. | Measuring the 200 volt B+ at the CRT socket we found the voltage to be under 126 vdc. This indicated the 200 volt source was not running. I had the tech check R553 a .47 ohm 1/2 watt resistor and it was open. Replaced the resistor and the set operated normally | Muller |
| Sony | KV32V25 AA-2 | retrace | Unit has bright screen with retrace lines then shuts down. | Measuring the 200 volt B+ at the CRT socket we found the voltage to be under 126 vdc. This indicated the 200 volt source was not running. I had the tech check R553 a .47 ohm 1/2 watt resistor and it was open. Replaced the resistor and the set operated normally | Muller |
| Sony | KV32V25 AA-2 | raster | Unit had an arcing inside the flyback transformer. The tech replaced the transformer now the unit has a bright band at the top of the screen. The tech replaced the jungle IC without affecting the symptom | Tech noticed the +15 volt source was lower than expected. It was only 10 volts. It is not unusual. The voltage is normally 12 volts. What the tech missed is the -15. This voltage must be there in order for the set to have any vertical sweep. Resistor for the -15 volt source from the Flyback was open. D530 and R537 a 0.47 ohm resistor. | Muller |
| Sony | KV32V25 AA-2 | no video | KV32V25 Unit has no video when using the front input jacks. All other inputs are O.K. | When tracing the video signal from the front input connector we find good video on the connector but less than an inch away from the connector is a coupling capacitor C2233. Apparently the trace was torn after the video input jack entered the board. Placing a hard jumper wire from the Jack to the C2233(-) corrected the fault. | Muller |
| Sony | KV32V25 AA-2 | No Highvoltage | KV32V25 serial # 7014651. Unit has no high voltage. | The horizontal driver has tremendous amount of ringing on it. Does not change if we remove horizontal output transistor. The transistor has drive has 7 distinct pulses on the base that go above and below the cut off point of the transistor. These seven pulses are 1 microsecond in duration and are grouped in clusters after where the horizontal drive pulses are supposed to be. If allowed to operate for more than a minute the horizontal driver transistor Q502 will short C to E. The product has a bad jungle IC301 | Muller |