Sony Repair Tips
Search: sony
Results: 20086
Results: 20086
| Make | Model | Symptom | Problem | Solution | By |
|---|---|---|---|---|---|
| SONY |
KP41T25
RA2 |
Convergence | Kp41t25.. red convergence will not write to memory. when convergence is properly aligned red horizontal lines will migrate up or down after time | Suggest that the red sub deflection yoke plug be removed. this action eliminates the influence the convergence correction circuitry has over the red crt. once this was done the tv was turned on again and the cross hatch was placed on the screen. one of the intersection points of the red cross hairs was marked with a post-it note. the tv was allowed to run for 15 minutes. after 15 minutes the red cross hair mover 1/4 inch down the screen. this indicated the crt was defective. the only deflection the red tube had was the deflection that feed all the tubes. if vertical center were to drift it would drift on all the crt not just the red crt. | Muller |
| SONY |
KP41T65
RA2 |
Convergence | Sony kp41t65. cannot converge set. technician replaced all microprocessors, eprom, and convergence output ic's without effecting a cure | I had tech check the data pulses from the microprocessor to the dac chips. one of the data chips was only 3 volts peak to peak not the 5 volts necessary to communicate to the dac. problem was a leaky zener diode d803. | Muller |
| SONY |
KP61V45
RA2 |
Colored spot | Kp61v45 unit has a purple dot in the center of the picture. can be seen in when tsound is a white screen. | Tsound is a burn in the center of the green tube. tech will need to replace the green crt. tech also needs to follow the directions for the crt module upgrade bulletin # 380. addition of a 1ss83td diode between (anode)@r708 and cathode to ic (pin 6). in the event the ic is not available the crt driver board is. crt generic # is 07mac2(g) the possible subs are 8-733-494-05, 8-733-561-05, and 8-733 | Muller |
| SONY |
KP53V65
RA2 |
Colored shadows | Kp53v65 unit has purple and cyan shadows on the screen. these shadows are very pronounced when an all white pattern is shown on the screen | Unit has crt burn caused by a dvd player or a catv marquee that was allow to stay on the screen for an extended period of time. this apparently is caused when the dvd player has a disk in it and not playing the disk, a logo of the disk movie will appear on the screen. on a conventional direct view television this is not a problem if the display is left on the screen for several hours. but this is not true with projection televisions. sever damage will result if a stationary image if left on the screen for prolonged period of time. this is especially true with sony when it is in the external video input mode and the dvd/vcr is off. all sony's will say ""video"" printed on the screen. in 1 to 2 hours the tubes ion the projection television will be destroyed requiring them to be replaced. replacement cost is over $800.00. be aware, do not leave any projection television ""on"" with a stationary picture. just like screen savers are used to keep the computer monitors from leaving an imprint "" | Muller |
| SONY |
KP53V85
RA2 |
Bright raster | Kp53v85 unit has bright screen with retrace lines. crt socket ""cr"" board has a hole burned through it. previous tech out simply ordered all three crt driver boards and the 3 crt's because of a burn in the center of the tube. "" | Tech has no 200 vdc power supply from the g board . the 1Ω resistor is open from the d520 200 vdc rectifier to the cr board. | Muller |
| SONY |
KP53S35
RA2 |
Blue screen | Kp53s35 serial number 9022580 unit has blue screen swapped. | Tapping on neck of blue crt gives flashes of heave blue horizontal lines then returns to normal b&w tracking. unit will need a blue crt 8-733-497-05 | Muller |
| SONY |
KP53S35
RA2 |
Blows fuses | Sony kp53s35 ra-2 chassis. unit looses ps601 and ps602 intermittently | Factory upgrade. replace c815, c897, 858, & 889 from a 1000mfd @ 35 vdc to a 470 md @ 35 vdc. | Muller |
| SONY |
KP53V75
RA2 |
Black lines | Kp53v75 unit has black lines that appear across the picture. further talking to the customer reveals that they were wondering why when they operated this television it caused interference on other televisions in the house. | This set appears to have a slight high voltage arc or corona discharge that is causing interference to other televisions. this arc is also causing problems in the video circuit which is why the tech and the customer are seeing it on the screen of this television. tech needs to isolate the high voltage block, and crt from possible suspect by one by one disconnecting them from the high voltage power supply. the only indicator the tech can use is another television and look for the interference to disappear, since the sony will not allow the raster to appear if any one of the tubes is disconnected. after | Muller |
| SONY |
KP53V75
RA2 |
Audio | Unit has no audio. ic404 has audio up to the input of ic404(2&4). | Measuring the ic404(7, & 11) which are the outputs of the ic404 finds 1.3, & 32 vdc respectively. each of these outputs must be exactly 50% of the b+ of ic404(9) which was 32 volts. unit has defective ic404. ta8216 part # 8-759-246-70 | Muller |
| SONY |
KP53V45
RA2 |
Audio | No audio. while in the process of servicing the set, the unit lost green and blue convergence. | Unit has a defective ps401 fuse and ic403 in the output stage. as for the convergence problem tsound is a loose connection between the ""a"" board and the ""g"". "" | Muller |
| SONY |
KP53V75
RA2 |
Audio | . unit has no audio. tech ordered the ""a"" board under the says program. cannot get the eeprom reader to read the data from the eeprom to transfer the convergence alignment data from the old board to the new board. "" | Suggest the tech check the ps401 fuse. it was open. suggest tech to replace the fuse and audio output ic ic401 instead of replacing the ""a"" board "" | Muller |
| SONY |
KP53V75
RA2 |
Audio | Kp53v75 unit has no audio. ic404 has audio up to the input of ic404(2&4). | Measuring the ic404(7, & 11) which are the outputs of the ic404 finds 1.3, & 32 vdc respectively. each of these outputs must be exactly 50% of the b+ of ic404(9) which was 32 volts. unit has defective ic404. ta8216 part # 8-759-246-70 | Muller |
| SONY |
KP53V75
RA2 |
Audio | Kp53v75 serial # 9018895. after the set is on for only a brief period of time tsound will be a slight hiss that will come an go in the right channel audio. it can be heard even if the tv is placed in ""aux"" mode, with no input the his is noticeable "" | I have never heard of this symptom but since the television is under warranty and is covered in the s.a.y.s. program then it would be best that the ""a"" board be replaced. note to tech is that he must copy down the eprom values or the tech will need to re-converge the set from scratch. "" | Muller |
| SONY |
KP53V45
RA2 |
Audio | Kp53v45 no audio. while in the process of servicing the set the unit lost green and blue have lost convergence. | Unit has a defective ps401 fuse and ic403 in the output stage. as for the convergence problem tsound is a loose connection between the ""a"" board an the ""g"" "" | Muller |
| SONY |
KP53V45
RA2 |
Arcing | Kp53v45 unit has red tube that is arcing. | Tech calling in for red crt approval. crt is arcing in the neck. | Muller |
| SONY |
KP53S65
RA2 |
A.c. hum | Sony kp53s65. cust has two complaints. 1. unit has low level ac hum when using an external amp connected to the variable/fixed or the monitor outputs of the television. the hum is present when the volume on the tv is muted or set to minimum, and the volume of the external is turned up 20%. the hum is quite noticeable at this level. 2. when using the variable/fixed outputs the set will not have left channel output. | I had tech disconnect all connections (except to the variable/fixed output) to the rear of the set while in the condition mentioned in the first complaint. after all other inputs to the set was disconnected the catv connection was the only connection remaining. when it was disconnected the hum disappeared. this indicated the trouble is caused by a ""ground loop"" this condition is caused by the catv ground is a different potential than the rest of the equipment. this may not be able to be corrected without an electrician checking the customer electrical neutral and ground connections in the customer house wiring. we can simply solve the trouble by having the catv company installing a ""ground breaker"" in series with the catv feed. 2. the no output to the left channel output is caused by a torn trace at the left output connector for the variable/fixed outputs. "" | Muller |
| SONY |
KP46S25
RA1 |
Wrong color | The picture turns a reddish or pinkish cast after 20 minutes this is intermittent. pix flashes upside down then back to normal. this takes about 20 minutes but can be accelerated by heating the ic301 with a heat gun. | Defective jungle ic chip ic301 | Muller |
| SONY |
KP46S25
RA1 |
Vertical | Pix flashes upside down then back to normal. this take | Defective jungle ic301?. | Muller |
| SONY |
KP53S15
RA1 |
Smear | Kp53s15 unit has a green smear | When tapping on green crt the picture the picture will smear. tapping | Muller |
| SONY |
KP53V35
RA1 |
Shuts down | Sony kp53v35 ra-1. unit shut down as soon as set is turned on. tech ordered r865 and d814 because they were shorted after parts were installed a new symptom was evident. ""unit turns on but enters shutdown after the tube warm up. crt's get bright with ret "" | Unit had torn trace on e board that connects the 200 vdc line to cn708(7) which connects to the cr board. apparently the traces were accidentally torn in the process of moving the chassis around. repairing the traces corrected the symptom. | Muller |