Sony Repair Tips
Search: sony
Results: 20073
Results: 20073
| Make | Model | Symptom | Problem | Solution | By |
|---|---|---|---|---|---|
| SONY |
KV32V25
AA-2 |
Arcing | Kv32v25 serial 7036251. unit has an arcing inside the flyback transformer. tech replaced the transformer now the unit has a bright band at the top of the screen. the tech replaced the jungle ""ic without effecting the symptom "" | Tech noticed the +15 volt power supply was lower than expected. it was only 10 volts. it is not unusual. the voltage is normally 12 volts. what the tech was missing is the -15. this voltage must be there in order for the set to have any vertical sweep. d530 was shorted and open r536 the 0.47Ω current | Muller |
| SONY |
KV27V10
AA-2 |
Ac leakage claim | Kv27v10 serial 7104657. when the catv rep was out a few days ago he plugged in the set in to wall and when the prongs made contact with the ac wall outlet a small spark was seen. the catv rep exclaimed, ""the television is a fire hazard, and you need to call for service!"" he left the set unplugged and we went out on this day. "" | Our tech plugged in the set and found the set did have a spark as soon as the set was plugged in the ac outlet. this is perfectly normal because this chassis has to fully charge 2 820 mfd electrolytics in a voltage doubler configuration. this causes a tremendous amount of in rush current that may draw several amperes until the filters are charges up. this will cause a contact arc the moment the set is connected to the ac line. this set poses no more fire hazard than any other electrical device that plugs into the ac outlet. we also performed an a.c leakage test on the chassis and found that it was less than .015 volts measured at the customers ground connection and neutral. | Muller |
| SONY |
KV32S40
AA-2 |
A.c hum | Kv32s40 serial 9028282 that has a low level audio hum in the video input or tuner mode. looked in the fpr on web site but could fine nothing on the subject. the hum is at 60 hertz | The hum is a result of magnetic flux from the vertical deflection yoke. the 60 hz is radiating into the low level audio circuits through inductive pick up from lead dress and ground loops. to minimize these remove jw086 and jw1007.add 22awg wire from jw270 to ground side of r477. this wire should be on the top side of the a-board and routed to following the audio signal lines from ic1401 (audio | Muller |
| SONY |
KV32XBR45
AA-1 |
Weak video | Sony kv32xbr45 unit has a very faint picture but the osd is fine. problem shows up in the tuner and video input mode. tech ordered q401 but did not correct the symptom | There is video at the base of q401 but not at the emitter. q401 measures 9 volts on all elements. base must be 4.5 volts. transistor is in cut off. bases and emitter are the same 9 volts. unit has open r617 a 680Ω resistor. | Muller |
| SONY |
KV32V16
AA-1 |
Shutdown | Kv32v16 serial 7089163 unit will not stay on. goes into shut down immediately after turn on | . when hv comes up the signal at the collector of the horizontal output transistor is normal. no shorts can be found in the power supply. pm501(1-810-061-21) & ic601(1-810477-11). pm501 was to culprit in this case. | Muller |
| SONY |
KV32XBR35
AA-1 |
Shut down | Unit will shut down each time the remote headphones circuit is turned on. | Unit has an intermittent short to ground on the ir12 volt line located at the output of ic202(3-4) located on the ""a"" board. this short was caused by a solder splace on that circuit "" | Muller |
| SONY |
KV32TW67
AA-1 |
Remote | Kv32tw67 serial 70040800 remote does not function rmy102 remote is being used. the menu displays when in the ""menu"" button on the remote is pressed. we are able to highlight each area of the menus selection which are the ""video, timer, setup, and closed caption"" choices. but when selection of any of these are tried nothing happens. in the service mode service menu the service menus comes up with afc as the first selection. however the binary number (1000) displayed under the word ""service"" keeps changing from 1000 to 1100) randomly "" | The remote has been replaced without effecting the symptom.. this appears to be a system control failure. all id codes are within normal values. suggest the tech replace the following components ic101 and ic102 are 8-752-856-00 and 8-759-280-74. the components correct the symptom. | Muller |
| SONY |
KV36FV15
AA-1 |
Raster | Kv36fv15 unit will turn on with the front panel control but the set will not develop raster or sound. the high voltage will turn but no raster. after 3 minutes the raster and sound will appear | Tech needs to look into the data & clock lines of the chassis. these lines must be 5 volts peak to peak and have a typical word length of 1000 milli seconds. tech discovered the sda pulses were 3.3 volts peak to peak whereas the clk pulses were at 5 volts. tech had to isolate each load on the sda line and found the pip tuner was responsible for loading down the data line. | Muller |
| SONY |
KV32XBR250
AA-1 |
Noise video | Sony kv32xbr50 this customer has a goldstar 8mm/vhs dual deck vcr located under this television on the built in shelf. when customer uses the 8mm deck the playback of the tape has corrupted audio, and poor tracking performance when played back on this television | The design of the 8mm format is significantly different from that of the vhs. the 8mm format does not have any stationary heads and completely relies on the signals from the rotary video heads on drum. 4 atf (auto tracking fix) carriers are recorded on to the tape. apparently the shielding in the 8 mm vcr, this close proximity to the tv, and the lack of shielding in the sony tv caused the corruption of the 4 atf signals. placing the vcr on the bottom shelf of the tv cabinet corrected the symptom. | Muller |
| SONY |
KV32XBR85
AA-1 |
No raster | Kv32xbr85 unit has no raster. has sound and weak osd. stand-by light is not flashing. | Unit appears to have a normal ik feed back to the jungle ic. screen voltages are 670 vdc and the cathode is running at 180 vdc. unit looks like a defective jungle ic. replacing the jungle ic corected the symptom. | Muller |
| SONY |
KV32XBR37
AA-1 |
No raster | Kv32xbr37 serial 80139945. unit has no raster. has sound, crt filaments, and high voltage. led in front is flashing | Tech may have a ik failure. when bringing up the g2 the raster will appear with full vertical sweep and a purple screen. not much green. tech needs to look at the ik bμFfer collectors on q771, q772, & q773. normally with beam current there shall be about 1 volt on each collector. with the crt socket removed all collectors must drop to ""0"" volts. q771 did not. it was 1.2 volts regardless if the tube was connected or not. tech needs to short q771(e&b) and see if the collector will drop. it did not. tv will need a replacement q771. replacement cured the symptom. "" | Muller |
| SONY |
KV32TW77
AA-1 |
No high voltage | Sony aa-1 chassis. unit no high voltage or sound. ry602 latched at turn on. tech replaced the flyback and q601, q602, vdr601, vdr602, vdr603 & r607. after theses components were replaced the unit still did not produce secondary b+. only 3 volts on the collector of the horizontal output. | Inspected the power oscillator and discovered that it was running and producing 167 volts dc at the input side of ry602, but a <13 volts on the low side. jumping ry602 restored high voltage. unit had a bad ry602 relay in the power supply. | Muller |
| SONY |
KV32XBR45
AA-1 |
Geometry | Unit is trying to constantly adjust the vertical height and horizontal size intermittently. | When monitoring the e/w pin output of the m board the signal was very instable. it was decided to replace ic351 the jungle ic. this corrected the trouble. | Muller |
| SONY |
KV32TS46
AA-1 |
Dead | Unit was dead. has shorted horizontal output and shorted q601, & q602 components in power supply replaced. after replacement unit will turn on but still has no secondary voltage output of power transformer. all relays click but no high voltage. has sound. | Tech needs to check the condition or ry602. ry602 is the switching relay that turn on and off the set. the relay is ""hot"" switched. in other words one side of the relay is connected to power oscillator output that runs nearly 350 vac peak to peak at 90khz. once the relay is closed this energy is placed across the power output transformer and provides the drive necessary to produce the b+.measuring the input voltage of the relay to ""hot' ground found it to be 150 volts dc mode. but on the other side of relay we has 3 volts dc mode. unit has defective ry602 relay. "" | Muller |
| SONY |
KV32XBR45
AA-1 |
Convergence | Unit has nis-convergence of red & blue vertical lines which are displaced horizontally. tech replaced the crt. this did not solve the problem. | Suggest tech look for r789 and see if it is open it is on the on ""c"" board. the value is around 10 meg. there are two different chassis and crts used for this model. if they have the older chassis type that requires h stat convergence (crt board has h stat control) they need to order the older crt as per the manual. if newer type (no h stat) then the new crt as per service manual supplement -1 is needed. crt 8733-743-05 the h stat is done using the yoke ring magnets. "" | Muller |
| SONY |
KV32XBR45
AA-1 |
Convergence | Unit has mis-convergence of red and blue vertical lines. they are displace horizontally. tech replaced the crt without correcting the symptom. | R789 open h-state not operational. what i'm finding is a resistor that appears to be open on this ""c"" board it is r789 the value cannot be read nor is it listed in the esi software parts list. trying another value from 10 to 20 megΩ. this resistor is in the ground return of the h-stat resistor that is installed in the crt. tech needs to try different values to try and make this set converge horizontally. this tv converged with a 10 megΩ resistor. "" | Muller |
| SONY |
KV32XBR45
AA-1 |
Convergence | Kv32xbr45 unit has severe horizontal static convergence error. tv cae to us from another shop where the crt and flyback was replaced. customer call us for second opinion. | Suggest tech look for r789 and see if it is open it is on the on ""c"" board. it the value is around 10 meg. there are two different chassis and crts used for this model. if they have the older chassis type that requires h stat convergence (crt board has h stat control) i have attached the two service manual supplements, and the sb325r1. however none of them have show this resistor. we were able to install a resistor in this unit that was a two 10 megs in series. trimming the value by adding another 10 meg in parallel with one of the other 10 megs. we were able to converge the set. original part was not available. "" | Muller |
| SONY |
KV32XBR45
AA-1 |
Convergence | Kv32xbr45 unit has convergence of all vertical lines are displace horizontally. tech replaced the crt without authorization. this did not solve the symptom | Suggest tech look for r789 and see if it is open it is on the on ""c"" board. it the value is around 10 meg. there are two different chassis and crts used for this model. if they have the older chassis type that requires h stat convergence (crt board has h stat control) they need to order the older crt as per the manual. if newer type (no h stat) then the new crt as per service manual supplement -1 is needed. crt 8-733-743-05 the h stat is done using the yoke ring magnets. i have attached the two service manual supplements, and the sb325r1. "" | Muller |
| SONY |
KV32XBR45
AA-1 |
Convergence | Kv32xbr45 convergence is way off in the horizontal direction | Unit has an open r789 a 18 meg 1/2 watt resistor for the horizontal static convergence. the tech will have to make a resistor out of 3, 6.2 meg resistors. | Muller |
| SONY |
KV32XBR45
AA-1 |
Convergence | Kv32xbr45 convergence is way off in the horizontal direction | Unit has an open r789 a 18 meg 1/2 watt resistor for the horizontal static convergence. the tech will have to make a resistor out of 3, 6.2 meg resistors. | Muller |