Dicas Reparação SONY
Modelo - Chassis
Pesquisa: SONY Enviar Dica Resolvida
Resultados 18938
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KPR53EX35 AP | NO RASTER | KPR53EX35 Unit has no raster but has audio and high voltage | Unit has no filaments to any of the three CRT's Tech needs to look at the output of T607. This is the filament supply transformer. Note: the filament voltage rides 240 volt above cold ground.. Filament voltage can be read between connector G4(3,4). Product had loose solder connections around this transformer and R613. | Muller |
| Sony | KP53EX35 AP | NO RASTER | KPR53EX35 Unit has no raster but has sound and high voltage. | Unit has no filament voltages. Tech needs to measure the filament source at G4(3 & 4) This should be about Unit has loose solder connection on At D624. Also the connections to the Filament transformer were loose on the board. Several loose solder connections on T605 (4 & 6) were also in question. I suggested the tech resolder all dubious connections in the ""G"" board "" | Muller |
| Sony | KPR46EX25 AP | NO Raster | Sony KPR46EX25 Unit has no raster. Filaments do not warm up. No pulses to the filament pulses to CRT but filaments are 200 volts above ground. | Unit had open resistor R697 a 1.2 ohm resistor for the filaments | Muller |
| Sony | KP53S55 AP | no High voltage | KP53S55 Serial 9003661. Unit has no high voltage, Tech replaced the High voltage block and the set still has no High voltage. | Measuring the B+ 's at the ""A"" board connector A2(1 &9) we fins -90 & +115 respectively. The -90 is a wrong. It should be -135 vdc. Measuring the collectors of the Drivers for the HV output Q806 we find the voltage at 122. This would indicate the Horizontal drive may be missing. Tech needs to look at the H driver circuit for a no drive condition. "" | Muller |
| Sony | KP41EXR96 AP | line paring | Sony AP chassis. Unit has line paring at the vertical rate. Appears like the scanning lines are spreading apart in the middle of the screen. These disappear after the fuses are removed from the ""D"" board. "" | This is a very good test to insure the trouble is in the convergence correction. Unit had defective Convergence output IC's | Muller |
| Sony | KP53XBR35 AP | horizontal | Unit has a intermittent symptom of a horizontally doubled picture. In other words, if a 1 inch wide re vertical bar were to be displayed at the center of the screen another I inch wide red vertical bar would be seen about 4 inches from the left side of the picture. | Recommend the Digital comb filter for this unit to be replaced. Since the jungle IC was replaced to try and correct this symptom. The digital combfilter is the only thing that could cause the storage of several lines of video and insert it in the wrong spot if the digital counters in the combfilter malfunction. | Muller |
| Sony | KP53S55 AP | HIGH VOLTAGE | Unit has no high voltage, Tech replaced the High voltage block and the set still has no High voltage. | Measuring the B+ 's at the ""A"" board connector A2(1 &9) we find -90 & +115 respectively. The -90 is wrong. It should be 135 vdc. Measuring the collectors of the Drivers for the HV output Q806, we find the voltage at 122. This would indicate the Horizontal drive may be missing. Tech needs to look at the H driver circuit for a no drive condition. "" | Muller |
| Sony | KP53XBR35 AP | ghosting | KP53XBR35 After unit has been playing a while the picture will duplicate it self on the left side of screen. Customer was able to take a photograph of the symptom, | The duplicated picture is in the proper chroma phase, sync, brightness, and contrast. but is slightly elevated in height about 3 or 4 horizontal lines. The symptom may stay on the screen for a few minutes or several hours. The second phantom picture is delayed by, what calculates in the photograph, 31 microseconds which is about 1/2 H. Forwarding this case to Sony. This symptom is intermittent. Recommend the Digital comb filter for this unit to be replaced. Since the jungle IC was replaced to try and correct this symptom with. The digital combfilter is the only thing that could cause the storage of several lines of video and insert it in the wrong spot if the digital counters in the combfilter malfunction. Swapping the combfilter cured the | Muller |
| Sony | KP53V15 AP | Dead | Unit is dead. Will not turn on. Just shuts down | Q811 shorted. Tech replaced the transistor with a 2SD188. Tech checked the distribution of high voltage for pin holes in the lead dress. Nothing was found. The transistor did not overheat and he let it run for 45 minutes. Suggest the set run for a while and see if it shorts again. All looks well in its operation. | Muller |
| Sony | KP46S55 AP | Dead | Unit is a dead set. Unit has an extremely hour glass picture. Q508 getting very hot. | Tech needs to check the B+ on the emitter of the Horizontal output. Tech will need to check the areas around the Q508 and it's drivers. It was found the voltage was normal but Q508(C) was at -106 vdc. But further visual inspection on the driver Q507 found ring fractures in the solder connections in this circuit.. While the voltages were being measured the set began to operate correctly. | Muller |
| Sony | KPR53EXR15 AP | DEAD | KPR53EXR15. Unit had no power Unit has Q603 and Q614 are shorted. When all are replaced only Q614 shorts. | Tech needs to apply power to this unit easily, with the use of a variac. While watching current go up gradually. Suggest that the ""D"" board be disconnected and see if it will turn on with no more than 1 amp of current. It did not. An Amp of current was reached at 38 vac.. Further checking found a "" | Muller |
| Sony | KP46S55 AP | dead | KP46S55 serial 9104007 Unit is a dead set Unit has an extremely hour glass picture. Q508 getting very hot. | Tech needs to check the B+ on the emitter of the Horizontal output. Tech will need to check the areas around the Q508 and it's drivers. It was found the voltage was normal but. Q508(C) was at -106 vdc. Further visual inspection on the driver Q507 found ring fractures in the solder connections in this circuit.. While the voltages were being measured the set began to operate correctly. | Muller |
| Sony | KP41EXR96 AP | dead | .KP41EXR96 unit dead. Will not power up. But will turn if the convergence board is disconnected | The 15 or -15 volt supply was missing?.Diode D605 shorted. Tech should check all devices on the + and - 15 volt supply line as well as the 4 post regulators on the ""D"" board. Tech found a shorted C1742 located on the ""D"" board. It connects between the -15 and + 15 regulators IC905, IC906. "" | Muller |
| Sony | KP41EXR96 AP | dead | .KP41EXR96 unit dead. Will not power up. But will turn if the convergence board is disconnected. Customer claimed, ""Picture separated in to colors then the TV went out."" "" | No 15 or -15 volt supply?.Diode D605 shorted. Feeds all devices on the + and - 15 volt supply line. Note the replacement Dual diode be sure it is a common ANODE device. | Muller |
| Sony | KV35S40 AP | CRT | Unit has preglow at the instant the television is turned on. The preglow shows in the lower left and right hand corner and stays until the raster appears. | This phenomena is normal and is caused by the IK pulses that are produced at the instant of turn on. Even thought the cathodes are not completely warmed up there will be a slight amount of beam current produced by just the IK pulses. Since these pulses are at the top portion of the tube or on the curved funnel portion of the CRT this symptom is common and is not considered a defect in the CRT. | Muller |