Sony Repair Tips
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Results: 20086
Results: 20086
| Make | Model | Symptom | Problem | Solution | By |
|---|---|---|---|---|---|
| SONY |
KV32XBR76
FN |
Poor color | Kv32xbr76. unit has poor color registration but color bars appear near normal. but when cross hair pattern is put up on the screen there are no blue vertical line. there are red and green vertical line | This symptom is a result of a high frequency loss. the ability for the amplifiers in the b drive to turn on an off rapidly is a direct result of how high the bandwidth is. in this case the three outputs of the jungle ic301(20,22,&23) had the typical signal when viewed on an oscilloscope. all three outputs had the same vertical spike in the center of the horizontal line on the oscilloscope scope. waveform showing the cross hair | Muller |
| SONY |
KV32XBR76
FN |
No high voltage | Kv32xbr76 unit will not turn on no high voltage. measuring the condition of the d1409 is shorted. | The problem is caused by d1409 on the a board shorting. problem caused by an intermittent b+ regulator on the g board, ic651, 1-809-524-11. replacement resolves problem. we have seen a number of these units lately with d1409 shorted. often it is simply ring cracks on ic651 causing the problem. this unit did have a loose solder connection on ic651(1) but it did not drop the voltage down enough across d1409. the voltage was always 36.6 volts across a 36 volt | Muller |
| SONY |
KV32XBR96
FN |
Horizontal sweep | Kv32xbr95s unit has an extremely wide picture. | I had tech look at q501(e) the voltage should be about 16 volts. this is the pin modulator input for pincushion correction. in this tv it was 2 volts. a resistance check finds theΩ value to be under 10Ω. tech needs to check | Muller |
| SONY |
KV32XBR36
FN |
Dead | Kv32xbr36 unit will not power on. monitoring the 17 vdc stand by supply we find the voltage running at 4.6 volts | One of the primary filters on the 17 vdc standby supply c662 a 220mfd @ 35vdc was open. | Muller |
| SONY |
KV32XBR96
FN |
Dead | Kv32xbr96. unit is dead and has no vertical sweep. | R623 and vdr 602 burned up. tech needs 8.2Ω resistor to replace. tech does not have 8.2Ω in his stock. however he can make an 8.2Ω by paralleling a 10 and 47Ω resistor. this will create a 8.24Ω resistor. c531 vented is connected to r881. | Muller |
| SONY |
KV32XBR76
FN |
Dead | Unit will not turn on. no high voltage. measuring the condition, d1409 is shorted. | The problem is caused by d1409 on the a board shorting. problem caused by an intermittent b+ regulator on the g board, ic651, 1-809-524-11. replacement resolves problem. we have seen a number of these units lately with d1409 shorted. often it is simply ring cracks on ic651 causing the problem. this unit did have a loose solder connection on ic651(1) but it did not drop the voltage down enough across d1409. the voltage was always 36.6 volts across a 36 volt | Muller |
| SONY |
KV32XBR36
FN |
Dead | Unit will not power on. monitoring the 17 vdc stand by supply we find the voltage running at 4.6 volts. | One of the primary filters on the 17 vdc standby supply c662 a 220mfd @ 35vdc was open. | Muller |
| SONY |
KV27XBR10
FN |
Aft | Kv27xbr10. serial 7009564. unit has aft drifting as soon as the channel is addressed. it never stops the aft search | Unit needs to have the if/demodulator module removed from it's shielded compartment and resolder all the adjustable tuning transformers. the afc coil/transformer has ring fractures around the pins that protrude through the | Muller |
| SONY |
KV32XBR100
DA1 |
Retrace lines | Kv32xbr100 unit has a bright screen with retrace lines | The 200 vdc line at the crt is only running at 144 vdc on all cathodes. unit has an open diode on flyback transformer for the 200 vdc power supply | Muller |
| SONY |
KV32XBR100
DA1 |
Raster | Unit will not get raster even if the g2 is raised all the way up. we still don't get a bright screen with retrace lines. tech requesting the feature box. this will be a waste of time because the feature box is not necessary | R554 was open | Muller |
| SONY |
KV9PT50
BN1 |
Sys con | Sony kv9pt50 serial unit does not respond with the remote or keyboard. in fact when the keyboard is activated the volume goes low and any other key causes the set to either turn off or change channels | Shorted c009 on pin ic100 | Muller |
| SONY |
KV20FV10
BA4 |
Vertical line | Customer claims the set develops a symptom of a black vertical line in the center of the screen. it is spreads rapidly across the screen until there is no raster. afterwards there is still sound but no on screen display or raster. customer claims the led in front does not flash. | Taking a conservative approach to this repair the tech needs to enter the tech menu and reset the vss parameter from 0 to 1 and the cdmd from 0 to 3. this will cause intermittent loss of raster. there are no error codes listed in the tech menu. tech will need to check back in two days an see if the symptom shows up again. | Muller |
| SONY |
KV27V42
BA4 |
System control | Kv27v42 serial 8028220. when this television is on channel 2 the raster will go out. changing the channel the raster returns. going back to channel 2 the raster disappears again. led in front flashes when the ""no raster"" symptom is present. "" | Tech needs to enter the tech menu and adjust the cdmd parameter from ""0"" to ""3"". "" | Muller |
| SONY |
KV27V40
BA4 |
Sys con | Kv27v40 serial # 8015653 unit is connected to antenna and two different satellite systems and want to auto program each satellite receiver in both a and b inputs. | Customer want to autoprogram all of these power supplys into antenna a and the other power supply into antenna b. this is not possible with this type of television. | Muller |
| SONY |
KV27V42
BA4 |
Shuts down | Kv27v42. unit runs but will shut down intermittently with the timer led flashing in a sequence of two flashes then a 4 second pause, then two flashes. seem be sensitive to the effects of beam current. just prior to shut down the set will exhibit horizontal instability. the main b+ from the power supply is stable | Suggest the tech try running the set with the crt disconnected. the set runs fine in this mode. the horizontal output is running normal temperature. suggest the tech measure the collector of q571( c ) it should be close to 4 to 5 volts with beam current. it was 9 volts with a normal screen brightness. it would drop to 8 volts but never lower than that. the q571(b) was at 135.1 and q571(e) was 135. the device is a pnp transistor. with these voltages this transistor should be turned off. ""0"" volts on the collector. i had the tech remove q571( c) and the set ran fine. the collector then measured 135 vdc. transistor checked statically ok but suggested the tech replace it anyway "" | Muller |
| SONY |
KV27S42
BA4 |
Shutdown | Kv27s42 unit will turn on but will shut down after 1 second. the led in front flashes 5 times. if you check the error codes of 4 times which indicates the set has a vertical failure. however when we jumper the relay ry602(ac contacts) the set will come on and id power button is pusher the set will have a normal picture with sound. but obviously it will not turn off. | While running in this condition i discovered the base of q610 was in saturation. floating the collector of q610 allowed the set to run without the jumper on the relay. on - off operation was normal. measuring the anode of d620 found it to be 4.5 volts where the cathode was at 7.5. this appears to be a 10 volt zener. replacing the diode d620 cured the trouble. | Muller |
| SONY |
KV27V42
BA4 |
Shut down | Kv27v42. unit had led in front flashing 4 times after turn on. this indicates the unit has no vertical deflection. | The vertical out is shorted and burns out the -15 volt supply. the resistor r561 is a 1/4 watt and r562 is a 1/2 watt. these resistors typically are both the same wattage. it is suggested to replace both with the same value. 0.47Ω @ | Muller |
| SONY |
KV27V42
BA4 |
Osd | Kv27v42 when playing the dvd player through the s-video input the letters ""dvd"" show on the screen. "" | I asked the tech to enter the tech menu and replace the setting in the vss parameter from ""0"" to ""1"" also replace cdmd from ""0"" to ""3"" . this relates to the bulletin tv420. however this did not correct the symptom. i had the tech scrutinize the picture very closely and he discovered the image begins to have a slight sync stability prior to the event where the set displays the words ""dvd"". i had the tech interrogate the composite video out of the dvd player and look for any anomalies in the composite video, vertical blanking interval, and horizontal sync. this unit uses sync to determine if the input port is live with valid sync. if sync is missing or corrupt the osd will show the words that are defined by how the input label programmed. this unit may "" | Muller |
| SONY |
KV27S42
BA4 |
No raster | Kv27s42 unit has a flashing picture on channel 2. the raster will increase to a point where the raster will disappear with the front panel led flashing 5 times indicating an akb failure. | Tech need to enter the tech menu and reset the vss parameter from 0 to 1 and the cdmd from 0 to 3. channel 2 is broadcasting a signal in the vbi area of the video signal. | Muller |
| SONY |
KV27S40
BA4 |
No raster | Sony kv27s40 serial 8070786 no raster. has osd and sound. timer led not flashing. tracing the video signal found that it was getting to the comb filter but no chroma or luminance output. | Pin 27 of the combfilter did not have and 3.58 mhz signal on it. looking in the tech menu of the chassis found the parameter #51 fsc was set to ""0"" we set it to ""1"" and restored the chroma and luminance. "" | Muller |