Dicas Reparação SONY
Modelo - Chassis
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| 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 |
| Sony | KP53S25 AP | CRT | KP53S25 Serial 9002282 Unit has burned tubes caused by the word ""VIDEO"" is burned on the screen "" | This unit has 3 defective CRT's that have letter burns on them. All three tubes need replacement. | Muller |
| Sony | KP53V15 AP | CONVERGENCE | Unit has a pulsating red convergence . | Tracing the pulsating we find the output of IC506 has a pulsing on it that is coinciding to the pulsing on the screen. Unit has a defective IC506. | Muller |
| Sony | KP53V15 AP | CONVERGENCE | Sony KP53V15 AP chassis. This unit will not allow the customer convergence centering to function. Tech needs to know where the electronic centering takes place. | Electronic centering is accomplished by the customer using the remote. Serial data codes will instruct the bus decoder IC506 to change the D.C. offset voltage to IC551 on ""V board"" Defective IC551. "" | Muller |
| Sony | KPR46EXR1 5 AP | CONVERGENCE | KPR46EXR15 Unit has no control over the Red or blue Horizontal centering for the customers convergence adjustment. | Suggest the tech check the possibly that a problem on the ""A"" board IC506 may be causing the trouble. This IC controls both the horizontal and vertical centering of the red and blue CRT registrations. The Horizontal correction voltages are simply a DC voltage that is fed to the ""V"" board. The ""V"" board houses the IC's and drivers that will change the DC offset voltage that effects the Horizontal centering. However these circuits were operating correctly. It was determined that IC902 was running warmer than normal. Unit had defective IC902 CXA1268P the Wave generator was defective. "" | Muller |
| Sony | KP53V15 AP | convergence | KP53V15 serial 9011915 Unit was serviced by another service vendor. Unit has a pulsating red convergence . | Tracing the pulsating we find the Output of IC506 has a pulsing on it that is coincident to the pulsing on the screen. Unit has a defective IC506 | Muller |
| Sony | KP46V15 AP | CONVERGENCE | KP46V16. Unit does not have control of Red horizontal centering | Tech needs to look at the output of IC506(5) for the Red horizontal centering. This IC is the Bus Decoder that decodes the data to 4 separate outputs. Each output is for Red H & V, B H & V Centering. Since the Centering is fine for the B Horizontal and poor for red it is suggested too replace the IC. New IC corrected the symptom. | Muller |
| Sony | KP53XBR45 AP | control panel | KP53XBR35 Unit has symptom of when the volume up is activated the channel down is activated instead. All other buttons act normally on this analog string. Tech did not check the other analog string which is where the ""Menu, +, -, and display key. "" | There are two identical analog keyboard voltage dividers attached to the KSENS0 & KSENS1 lines to the microprocessor. The should act identical in operation. The switches that acts as the volume up was swapped with the Menu key switch. The volume switch began working correctly and the menu stopped. The switch was replaced and now it works correctly. | Muller |
| Sony | KP61V15 AP | ARCING | TV will turn on but the Front panel LED will continually blink on and off. Unit gets high voltage but has a lot of arcing around the High voltage distribution block. Unit does have sound and has vertical sweep. The chassis is heavily corroded due to the environment. Unit is located next to an open window that receives ocean spray from the surf. | After closer inspection tech found the focus screen block assembly wires were falling off of the assembly. Cleaning the connections with water and thoroughly drying the connections then resoldering them to the block assembly corrected the fault. | Muller |