Sony Repair Tips
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Results: 20072
Results: 20072
| Make | Model | Symptom | Problem | Solution | By |
|---|---|---|---|---|---|
| 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 tsound 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 wsound 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 replace 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 replace 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 wsound the ""menu, +, -, and display key. "" | Tsound 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 |
| SONY |
KV32SR10
ANU-2 |
Raster | Kv32sr10 unit has dark raster with flaring across the picture. | Measuring the g2 voltage at 1000 vdc power supply for the g2 only finds 62 volts. r519 is open. replacing r519 a 2.2k resistor & d501. | Muller |
| SONY |
KP41EXR96
ANU-1 |
Dead | Sony anu-1 chassis. unit has defective horizontal output transistor | Apparently nothing else is damaged with this chassis. however if the horizontal output is shorted after several hours of operation. unit has defective horizontal driver transformer and driver transistor. leads on driver transformer show signs of oxidation | Muller |
| SONY |
KV27HSR10
ANU1 |
Raster | Unit has intermittent raster. bringing up the g2 voltage stops the intermittent action of the crt | Remove the following parts on the c-board. r754 resistor, 10kΩ, c719 capacitor, electrolytic 22nf/25v, r755 resistor, 5mm jumper, 330Ω. confirm and readjust the g2 for correct white balance. | Muller |
| SONY |
KV32XBR50
ANU1 |
No highvoltage | Sony kv32xbr50 . no high voltage,. has sound. tech claims all b+'s are normal from power supply however no high voltage. | B+ ok on horizontal output but not ok on horizontal driver. no b+ on driver. tech found small connection loose on primary connection of driver transformer. resoldered and restored normal operation. | Muller |
| SONY |
KV32XBR10
ANU1 |
No audio | Kv32xbr10 unit has no audio | Product has a defective mts audio controller part # 8-741592-2 (8-741-100-56) original number sbx1592-02 corrected the symptom | Muller |
| SONY |
KV32XBR51
ANU1 |
Intermittent raster | Kv32xbr51unit has intermittent symptom of no raster. has sound and high voltage. | Further visual checks in the television discover the filaments become dim intermittently. more visual inspection reveals many small ""ring"" fractures around the heater pins of the flyback transformer. "" | Muller |