Dicas Reparação SONY
Modelo - Chassis
Pesquisa: SONY Enviar Dica Resolvida
Resultados 18945
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KV9PT50 BN1 | SYS CON | Sony KV9PT50 serial Unit does not respond with the remote or Keyboard. In fact when the keyboard is activated the Volume goes low and any other key causes the set to either turn off or change channels | Shorted C009 on pin IC100 | Muller |
| Sony | KV20FV10 BA4 | VERTICAL LINE | Customer claims the set develops a symptom of a black vertical line in the center of the screen. It is spreads rapidly across the screen until there is no raster. Afterwards there is still sound but no On screen Display or Raster. Customer claims the LED in front does not flash. | Taking a conservative approach to this repair the tech needs to enter the tech menu and reset the VSS parameter from 0 to 1 and the CDMD from 0 to 3. This will cause intermittent loss of raster. There are no error codes listed in the Tech menu. Tech will need to check back in two days an see if the symptom shows up again. | Muller |
| Sony | KV27V42 BA4 | system control | KV27V42 serial 8028220. When this television is on Channel 2 the raster will go out. Changing the channel the raster returns. Going back to channel 2 the raster disappears again. LED in front flashes when the ""NO raster"" symptom is present. "" | Tech needs to enter the tech menu and adjust the CDMD parameter from ""0"" to ""3"". "" | Muller |
| Sony | KV27V40 BA4 | SYS CON | KV27V40 serial # 8015653 Unit is connected to antenna and two different satellite systems and want to auto program each satellite receiver in both A and B inputs. | Customer want to autoprogram all of these sources into antenna A and the other source into Antenna B. This is not possible with this type of television. | Muller |
| Sony | KV27V42 BA4 | SHUTSDOWN | KV27V42. Unit runs but will shut down intermittently with the timer LED flashing in a sequence of two flashes then a 4 second pause, then two flashes. Seem be sensitive to the effects of beam current. Just prior to shut down the set will exhibit horizontal instability. The main B+ from the power supply is stable | Suggest the tech try running the set with the CRT disconnected. The set runs fine in this mode. The horizontal output is running normal temperature. Suggest the tech measure the collector of Q571( C ) It should be close to 4 to 5 volts with beam current. It was 9 volts with a normal screen brightness. It would drop to 8 volts but never lower than that. The Q571(B) was at 135.1 and Q571(E) was 135. The device is a PNP transistor. With these voltages this transistor should be turned off. ""0"" volts on the collector. I had the tech remove Q571( C) and the set ran fine. The collector then measured 135 vdc. Transistor checked statically OK but suggested the tech replace it anyway "" | Muller |
| Sony | KV27S42 BA4 | shutdown | KV27S42 Unit will turn on but will shut down after 1 second. The LED in front flashes 5 times. If you check the Error codes of 4 times which indicates the set has a vertical failure. However when we jumper the relay RY602(AC contacts) the set will come on and id power button is pusher the set will have a normal picture with sound. But obviously it will not turn off. | While running in this condition I discovered the base of Q610 was in saturation. Floating the collector of Q610 allowed the set to run without the jumper on the relay. On - Off operation was normal. Measuring the anode of D620 found it to be 4.5 volts where the cathode was at 7.5. This appears to be a 10 volt zener. Replacing the diode D620 cured the trouble. | Muller |
| Sony | KV27V42 BA4 | shut down | KV27V42. Unit had led in front flashing 4 times after turn on. This indicates the unit has no vertical deflection. | The vertical out is shorted and burns out the -15 volt supply. The resistor R561 is a 1/4 watt and R562 is a 1/2 watt. These resistors typically are both the same wattage. It is suggested to replace both with the same value. 0.47 ohm @ | Muller |
| Sony | KV27V42 BA4 | OSD | KV27V42 When playing the DVD player through the S-video input the Letters ""DVD"" show on the screen. "" | I asked the tech to enter the tech menu and change the setting in the VSS parameter from ""0"" to ""1"" Also change CDMD from ""0"" to ""3"" . This relates to the bulletin TV420. However this did not correct the symptom. I had the tech scrutinize the picture very closely and he discovered the image begins to have a slight sync stability prior to the event where the set displays the words ""DVD"". I had the tech interrogate the composite video out of the DVD player and look for any anomalies in the composite video, vertical blanking interval, and horizontal sync. This unit uses sync to determine if the input port is live with valid sync. If sync is missing or corrupt the OSD will show the words that are defined by how the input label programmed. This unit may "" | Muller |
| Sony | KV27S42 BA4 | NO RASTER | KV27S42 Unit has a flashing picture on channel 2. The raster will increase to a point where the raster will disappear with the Front panel LED flashing 5 times indicating an AKB failure. | Tech need to enter the tech menu and reset the VSS parameter from 0 to 1 and the CDMD from 0 to 3. Channel 2 is broadcasting a signal in the VBI area of the video signal. | Muller |
| Sony | KV27S40 BA4 | No Raster | Sony KV27S40 serial 8070786 No raster. Has OSD and Sound. Timer LED not flashing. Tracing the video signal found that it was getting to the comb filter but no chroma or luminance output. | Pin 27 of the combfilter did not have and 3.58 MHz signal on it. Looking in the Tech menu of the chassis found the parameter #51 fsc was set to ""0"" We set it to ""1"" and restored the chroma and luminance. "" | Muller |
| Sony | KV24FV10 BA4 | NO HIGH VOLTAGE | KV24FV10 unit will not turn on. No High voltage. LED in front blinks 4 times indicating there is a vertical deflection has stopped. Both relays will latch but RY600 will unlatch after 15 seconds | RY600 is the degaussing relay. The 15 second delay is normal. Since the unit never develops high voltage it would be obvious to all that vertical deflection will not occur. However the flashing of the LED ""4"" times is a bit misleading. The turn-on relay (RY602) latches but we are not able to achieve secondary B+. Closer inspection discovers that we are not getting primary voltages either. Jumping the relay (RY602) achieves High voltage and all functions work normally. Unit has a defective RY602. part # 1-755-266-11 "" | Muller |
| Sony | KV27S45 BA4 | NO HIGH VOLTAGE | KV27S45 serial 8015302 Unit will turn on but will have high voltage. It will shut down with the LED in front flashing 5 times indicating there is no vertical sweep. Jumping RY602 I was able to keep the set on and test the power supply and IC451 integrity. | Checking all the ""MUST HAVES"" I found that all B+'s were normal on the vertiical output IC. But checking the Data and clock I found that the pulses, after the power is pressed the data and clock pulsed 3 time during a the 3 second period wait affter power button was pushed. After the 3 seconds there was a were a series of pulses with a duration of only 120 microseconds wide remaining for 3 more seconds then disappeared. The pulses were 5 volt peak to peak and looked OK. Artificially I was able to ""tickle"" IC451(1 & 7) with my Fluke 77 meter in the diode check mode. This tests the ability of the IC to deflect the beam up or down to check the intergrity of IC451. I was able to get the beam to move up and down with this test. We had the same type of Data and clock going to all peripherials. I unplugged the ""P"" board and started the set again. The Data and Clock now changed dramatically. Instead of a 120 Microsecond pulse train, it increased to was 1000 microseconds. Unit has defective ""P"" "" | Muller |
| Sony | KV27FV15 BA4 | INT RASTER | KV27FV15 Unit has Unit has a symptom when it is on Channel 4 (KNBC Los Angeles) the set will display a normal picture then get brighter and brighter then go to a no raster symptom with sound. | Tech needs to enter the tech menu mode and change the values of CDMD to 1 and VSS to 3. | Muller |
| Sony | KV27V40 BA4 | Dead | Unit is dead. Only the Timer LED flashes. | There are apparently no shorts circuits on the secondary of the main switcher supply. However when trying to discover why the IC601 was shorted we could not find any evidence of line surges that might have shorted the VDR601 or open R618. But when checking the secondary of the Flyback transformer at the outputs of D560 and D561 we found nearly 4.6 ohms from the +13 to the -13 volt source. Floating IC541(2&4) removed the shorted condition. Unit has a shorted vertical output IC541 shorted from the +13 volt to the | Muller |
| Sony | KV27S45 BA4 | Dead | KV27S45 VDR5050 Unit dead. Inspection of the chassis discovered there is no stand by voltage. Inspecting the ""E"" board found that the fuse F5050 was open and the VDR5050 had a chunk of material blown off of it. "" | VDR5050 is metal oxide varistor. It is in parallel with the AC line voltage . It appears the customer had a AC line source that blew the MOV, then the fuse. Checking Q5001 we do not find a short between Drain and Source. Suggest the tech remove the MOV and replace the fuse and try operating the set. It operates fine. Suggest the tech replace the MOV, but disable the television until the MOV can be replaced, since the MOV is a Protection device in the event the Power surge returns. NOTE: It was discovered the VCR was also dead which not was not evident at the time of the call. This confirms the power surge theory. VDR5050 = 1-801-074-41 F5050 =1-576-193-11 6.3 amp @ 125vac. | Muller |