Dicas Reparação SONY
Modelo - Chassis
Pesquisa: SONY Enviar Dica Resolvida
Resultados 18945
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KV27S36 AA-2 | audio | Sony KV27S36. Unit has choppy SAP audio. Stereo 0.K. | All SAP, Stereo, and mono functions come from the Tuner assembly and nowhere else. If a problem exists for the S.A.P. feature all circuitry relating to the feature is replaced when the tuner assembly is replaced. Recommend the Tuner/IF/MTS decoder assembly. Replacement corrected the | Muller |
| Sony | KV27S20 AA-2 | Audio | Sony KV27S20. Unit has a low pitch whine in the left audio channel. | Problem is best heard in the video input mode with no signal put to the input. It can be seen with an oscilloscope on one of the output pins of IC1401 but not on the input. Part number is 8-759-369-39. IC1401 corrected the trouble. | Muller |
| Sony | KV32S65 AA-2 | audio | KV32S65. Serial # 8014575. Sound and picture is fine but when the fixed or variable audio out is connected to an external audio amp and the set is muted a loud pop is heard in the right channel. | I had the tech try to measure if there was any DC voltages that resided on the Variable audio output connectors. There was ""4.5"" volts on the Right channel and ""0"" volts on the left channel. When the ""Mute"" transistors on the variable line triggered they pulled both lines to ground. When the external amp was connected to this circuit the input capacitor for the right channel charged with this 4.5 volts. We still had audio on this line even though it was at a 4.5 vdc potential. But when the Sony muted, the input capacitor inside the Big External amp discharged and caused a tremendous pop. C172 is a .47mfd used to decoupling the audio from IC101 the Variable audio control IC. This capacitor had 4.5 vdc on each leg measured to ground. Removing the capacitor and measuring the DC resistance across the cap measured 175 ohms. Replacement of the capacitor corrected the symptom. "" | Muller |
| Sony | KV27S45 AA-2 | AUDIO | KV27S45 serial 8046950 Unit has a very rapid change in volume when increasing the level from minimum to 4 notches above minimum | Tech needs to add a resistor in parallel with R432 to effectively reduce the value of R432. This changes the voltage divider ratio to the volume control circuit and makes the volume circuit more linear in operation. | Muller |
| Sony | KV27V65 AA-2 | AUDIO | Audio level adjustments will not increase in a linear fashion, instead the audio will increase rapidly in the first 1/3 of the bar graph. | A new microprocessor is available for this unit. It is part number T-998-600-32. It replaces the original IC001 which was M37273MF-251 | Muller |
| Sony | KV35XBR48 AA-2 | ARCING | KV35XBR48 serial 9014229. TUBE ARCING IN THE NECK | unit will need CRT A89LJT80XZ | Muller |
| Sony | KV35V76 AA-2 | ARCING | KV35V75 CRT is arcing in the neck | The CRT is bad. | Muller |
| Sony | KV32V26 AA-2 | arcing | KV32V26 serial 8019814. Arcing in the neck off CRT | Tech will need replacement CRT A80JYV51X | Muller |
| Sony | KV32V25 AA-2 | arcing | KV32V25 serial 7036251. Unit has an arcing inside the flyback transformer. Tech replaced the transformer now the unit has a bright band at the top of the screen. The tech replaced the jungle ""IC without effecting 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 was missing is the -15. This voltage must be there in order for the set to have any vertical sweep. D530 was shorted and open R536 the 0.47 ohm current | Muller |
| Sony | KV27V10 AA-2 | AC leakage claim | KV27V10 serial 7104657. When the CATV rep was out a few days ago he plugged in the set in to wall and when the prongs made contact with the AC wall outlet a small spark was seen. The CATV rep exclaimed, ""The television is a fire hazard, and you need to call for service!"" He left the set unplugged and we went out on this day. "" | Our tech plugged in the set and found the set did have a spark as soon as the set was plugged in the AC outlet. This is perfectly normal because this chassis has to fully charge 2 820 mfd electrolytics in a voltage doubler configuration. This causes a tremendous amount of in rush current that may draw several amperes until the filters are charges up. This will cause a contact arc the moment the set is connected to the AC line. This set poses no more fire hazard than any other electrical device that plugs into the AC outlet. We also performed an A.C leakage test on the chassis and found that it was less than .015 volts measured at the customers ground connection and neutral. | Muller |
| Sony | KV32S40 AA-2 | A.C Hum | KV32S40 serial 9028282 that has a low level audio hum in the video input or tuner mode. Looked in the FPR on web site but could fine nothing on the subject. The hum is at 60 Hertz | The hum is a result of magnetic flux from the vertical deflection yoke. The 60 hz is radiating into the low level audio circuits through inductive pick up from lead dress and ground loops. To minimize these Remove JW086 and JW1007.Add 22AWG wire from JW270 to ground side of R477. This wire should be on the top side of the A-board and routed to following the audio signal lines from IC1401 (audio | Muller |
| Sony | KV32XBR45 AA-1 | WEAK VIDEO | Sony KV32XBR45 Unit has a very faint picture But the OSD is fine. Problem shows up in the tuner and video input mode. Tech ordered Q401 but did not correct the symptom | There is video at the base of Q401 but not at the emitter. Q401 measures 9 volts on all elements. Base must be 4.5 volts. Transistor is in cut off. Bases and emitter are the same 9 volts. Unit has open R617 a 680 ohm resistor. | Muller |
| Sony | KV32V16 AA-1 | shutdown | KV32V16 serial 7089163 Unit will not stay on. Goes into shut down immediately after turn on | . When HV comes up the signal at the Collector of the horizontal output transistor is normal. No shorts can be found in the power supply. PM501(1-810-061-21) & IC601(1-810477-11). PM501 was to culprit in this case. | Muller |
| Sony | KV32XBR35 AA-1 | shut down | Unit will shut down each time the Remote headphones circuit is turned on. | Unit has an intermittent short to ground on the IR12 volt line located at the output of IC202(3-4) located on the ""A"" board. This short was caused by a solder splace on that circuit "" | Muller |
| Sony | KV32TW67 AA-1 | remote | KV32TW67 serial 70040800 Remote does not function RMY102 remote is being used. The menu displays when in the ""menu"" button on the remote is pressed. We are able to highlight each area of the menus selection which are the ""Video, Timer, Setup, and closed caption"" choices. But when selection of any of these are tried nothing happens. In the service mode Service menu the service menus comes up with AFC as the first selection. However the binary number (1000) displayed under the word ""Service"" keeps changing from 1000 to 1100) randomly "" | The remote has been changed without effecting the symptom.. This appears to be a system control failure. All ID codes are within normal values. Suggest the tech replace the following components IC101 and IC102 are 8-752-856-00 and 8-759-280-74. The components correct the symptom. | Muller |