Dicas Reparação
Modelo - Chassis KV25XBR
Pesquisa: KV25XBR Enviar Dica Resolvida
Resultados 95
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KV25XBR | NO BRIGHTNESS AFTER WARM-UP | After approx. 10 min warm-up pix would dim. G2 volts woulddrop approx. 80V while G1 volts would rise approx 80V indicating internalshort in CRT. | ||
| Sony | KV25XBR | EXCESSIVE HIGH VOLTAGE | The unit was producing too much HV and going into shut down.We found the problem to be caused by a defective C1664 on the D board.This cap is supposed to be a 0.025uF, however, it had decreased to approx.0.016 which of course changed the tuning. | ||
| Sony | KV25XBR | SHUT DOWN | Unit would shut down upon turn on. Brought up set with lowvoltage, found shut down being activated at horizontal osc. Found R1531was not a resistor but a capacitor. This set never worked. Capacitorwas installed at the factory by mistake. | ||
| Sony | KV25XBR | VERTICAL JITTER | Vertical jitter on satellite and prerecorded copy guardedtapes. | ||
| Sony | KV25XBR | NO MANUAL CONTROL OF VOLUME | No manual control of volume, channel change. No data presenton common buss to these switches and Pin 11, IC1301. This line measured200 ohms to ground. | ||
| Sony | KV25XBR | NO ON-SCREEN DISPLAY | At turn on set had display, but after a few min., displaywould go out. I had all correct inputs to display IC104 but no outputsafter warm up. | ||
| Sony | KV25XBR | FLASHING IN RASTER | Set would have flashing in raster when it was cold. Aboutafter 20 minutes, flashing disappeared. By splaying coolant on componentsproblem was isolated to C1653. | ||
| Sony | KV25XBR | VERTICAL FOLDOVER AT TOP OF SCREEN | Vertical foldover at top of screen with overscan. Foundslight distortion in waveform at DY-3 Pin 1. All voltages normal with theexception of collector of Q1507 being 40V instead of 62.4V as received. | ||
| Sony | KV25XBR | NO POWER | Replaced Q1524, all waveforms looked normal. -HQ COMMENTS: Q1524 is pin drive transistor. | ||
| Sony | KV25XBR | THESE UNITS HAD A VERTICAL JITTER ON A SATELLITE ANTENNA | When using these units on the satellite, they had a verticaljitter. I received four calls this week for this problem. Three wereKV-25XBR | ||
| Sony | KV25XBR | HIGH PITCHED SQUEAL | Customer complained of high pitched squeal. He also told methat he hears the same noise from several XBR units and also competitionmodels also. I told him I would see what I could do to alleviate theproblem. Using my sniffer, a hose with a small trans | ||
| Sony | KV25XBR | EXCESSIVE HV | The unit would go into HV shut down. We found after defeatingthe shut down circuit that the B+ was normal but that the HV was 35KV withno beam current/32KV max beam. We traced the problem to a defective C1664on the D board. This is the main tuning cap | ||
| Sony | KV25XBR | VERTICAL JITTER ON PAY-PER-VIEW CHANNEL | Customer in Chicago subscribing to Group W Cable set experi-ences vertical jitter and roll on Pay-Per-View channel only. All otherbroadcast and pay channels OK. -HQ COMMENTS: Pls compare composite video waveform at Pin 22/IC1501 forOK channels and the | ||
| Sony | KV25XBR | PICTURE TOO WIDE | Picture about 3 too wide on each side. If size reduced withwidth control then pin cushion adjustments lost most of their control. | ||
| Sony | KV25XBR | DEAD | Set would shut down after coming on. |