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Sony Repair Tips




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Search: sony
Results: 20072
Make Model Symptom Problem Solution By
SONY KV27V20
AA-2 		Closed caption Kv27v20 8015729 no closed caption on premium channels These are ok then the tech will need to replace the ic001 with an upgraded version per bulletin 329r1 original generic Muller
SONY KV27S20
AA-2 		Closed caption Kv27s20 serial # 7042141 unit will not operate in the closed caption mode if using the dvd player. however if the television operates in the tuner mode for over the air telecasts, closed caption works fine. Tech needs to order ic001= t-935-001-61 per bulletin r329r1. after replacement the tech will need to enter the tech menu and select ""criw"" and replace it from 15 to 3. also check the ""lblk"" must be 7, ""rblk"" must be 7 and ""hbswo"" must be 0. at this point save the new data and "" Muller
SONY KV35XBR48
AA-2 		Chroma Unit is connected in to component video input mode through a dvd player. the picture has a predominately green picture When operating a different dvd player the symptom is the same. tsound is no cure to this phenomin from sony at this time Muller
SONY KV35XBR20 0
AA-2 		Chroma Kv36xbr200 when the customer is using the rf input labeled vhf/uhf the set will picture will lose chroma intermittently. but when using the aux input the chroma is solid and does not vary. the tech replaced the rf switch without effecting the symptom. The customer is using two different rf power supplys. cable tv and a satellite dish. the catv is being feed into the rf input labeled vhf/μHf and the satellite is fed into the aux input. it appears the tuner does not correct the aft when two different rf power supplys are used. the channel will has to be readdressed again for any aft correction to occur. suggest the customer used the satellite in the s-video and separate video input mode. in his present configuration the customer is loosing all stereo reception, and all high frequency detail over. this corrected the symptom. Muller
SONY KV35S26
AA-2 		Chroma Kv35s36. unit has random chroma phase shifting. the tint will vary radically. ntsc color bars are not stable. ""barber polling"" effect of colors on bars. "" Suggest the tech look very close to the connection s to ic351(4) this the chroma afdc filter. components r354, c355, c355 are in the afcfil circuit. it is possible the trouble is a jungle ic but before replacing it is recommended to check the aforementioned components first. note: when checking the components it was found that c366 has glue touching each end of the device. the glue effectively replaced the value of the device. cleaning the glue and reinstalling the device corrected the problem. Muller
SONY KV35S26
AA-2 		Chroma Kv35s26 unit has the tint phase shift and color lock up problems only on the hughs satellite receiver. vcr and over air signals have solid color lock up. This symptom acts like it is a problem with the satellite receiver. inside the satellite receiver tsound is a ntsc encoder which injects the 3.579547 mhz color oscillator signal in the video. if this oscillator is too far off frequency it will not phase lock with the 3.579545 mhz in the television. this is a software problem with the satalite receiver. a software download will be available to all receivers in late Muller
SONY KV27S22
AA-2 		Bright raster Kv27s22 serial # 8102548. unit goes to a bright blue screen with retrace lines then shuts down. Unit has a defective crt. when unit is able to turn back on again the set will sometimes be in the video input mode. Muller
SONY KV35XBR35
AA-2 		B&w tracking Kv35xbr35. unit has color temperature error in the yuv input mode only According to sony tech support tsound is no adjustment for this input. refer this customer to sony customer affairs. Muller
SONY KV27V65
AA-2 		Audio Sony kv27v65 sound does not ramp up correctly. seems to get very loud as soon as the volume gets higher in a very short time I had tech get into the id codes and reset id2 from 239 to 175 and id 4 from 130 to 194. then initialize the eprom . set returned to normal operation Muller
SONY KV27S36
AA-2 		Audio Sony kv27s36. unit has choppy sap audio. stereo 0.k. All sap, stereo, and mono functions come from the tuner assembly and nowsound else. if a problem exists for the s.a.p. feature all circuitry relating to the feature is replaced when the tuner assembly is replaced. recommend the tuner/if/mts decoder assembly. replacement corrected the Muller
SONY KV27S20
AA-2 		Audio Sony kv27s20. unit has a low pitch whine in the left audio channel. Problem is best heard in the video input mode with no signal put to the input. it can be seen with an oscilloscope on one of the output pins of ic1401 but not on the input. part number is 8-759-369-39. ic1401 corrected the trouble. Muller
SONY KV32S65
AA-2 		Audio Kv32s65. serial # 8014575. sound and picture is fine but when the fixed or variable audio out is connected to an external audio amp and the set is muted a loud pop is heard in the right channel. I had the tech try to measure if tsound was any dc voltages that resided on the variable audio output connectors. tsound was ""4.5"" volts on the right channel and ""0"" volts on the left channel. when the ""mute"" transistors on the variable line triggered they pulled both lines to ground. when the external amp was connected to this circuit the input capacitor for the right channel charged with this 4.5 volts. we still had audio on this line even though it was at a 4.5 vdc potential. but when the sony muted, the input capacitor inside the big external amp discharged and caused a tremendous pop. c172 is a .47mfd used to decoupling the audio from ic101 the variable audio control ic. this capacitor had 4.5 vdc on each leg measured to ground. removing the capacitor and measuring the dc resistance across the cap measured 175Ω. replacement of the capacitor corrected the symptom. "" Muller
SONY KV27S45
AA-2 		Audio Kv27s45 serial 8046950 unit has a very rapid change in volume when increasing the level from minimum to 4 notches above minimum Tech needs to add a resistor in parallel with r432 to effectively reduce the value of r432. this replaces the voltage divider ratio to the volume control circuit and makes the volume circuit more linear in operation. Muller
SONY KV27V65
AA-2 		Audio Audio level adjustments will not increase in a linear fashion, instead the audio will increase rapidly in the first 1/3 of the bar graph. A new microprocessor is available for this unit. it is part number t-998-600-32. it replaces the original ic001 which was m37273mf-251 Muller
SONY KV35XBR48
AA-2 		Arcing Kv35xbr48 serial 9014229. tube arcing in the neck Unit will need crt a89ljt80xz Muller
SONY KV35V76
AA-2 		Arcing Kv35v75 crt is arcing in the neck The crt is bad. Muller
SONY KV32V26
AA-2 		Arcing Kv32v26 serial 8019814. arcing in the neck off crt Tech will need replacement crt a80jyv51x Muller
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 tsound 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