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Sony Repair Tips




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Search: sony
Results: 20086
Make Model Symptom Problem Solution By
SONY KV27S15
AA-2 		No chroma Kv27s15 unit has no chroma. black & white is ok. also no chorma while using the pip. sound and on screen display ok. initializing eprom does not change the effect. Scoping the first place wsound the chroma signal can be readily available is on the pip module. they are marked ""c in"" & ""c out"" on connector cn501(1 & 5). we have chroma going into the pip board but nothing coming out. jumping these pins together with a 1 mfd capacitor caused the color to return, as long as the capacitor was in place. unit has bad "" Muller
SONY KV36FV75
AA-2 		No audio Kv36fv75. unit has no audio. but also has no osd stating ""main"" or ""stereo"" main picture is fine. "" Id codes are 0=25, 1=55, 2=47 3= 0 , 4= 155, 5 =143, 6 =6, 7=0 which is correct. initializing the eepom did not correct the trouble. tech will be returning with a manual Muller
SONY KV27V22
AA-2 		Intermittent snow Kv27v25 unit has intermittent snow in the picture zthe tuner pn# 8-598-340-20 was replaced. now the set has a symptom wsound the remote control causes the set to enter the video input mode when the channel is selected. also the set will enter the video input mode if the and another brand of remote that operates a stereo receiver will put the set into the video input mode. I instructed the tech to enter the tech mode and set the id codes...id0=25, id1=23, id2=47, id3=0, id4=27,id5=135, id6=1, id7=0 . write these in memory, then press ""8"" ""enter"" to initialize. this corrected the problem. "" Muller
SONY KV32S26
AA-2 		Int raster Kv32s26 unit has a brighter than normal picture. when g2 is lowered the picture blinks on an off. tech replaced the flyback and jungle chip with no changes in symptom I had tech short the cn1761(1, 2, 3, & 6) together. this should give a perfect black and white picture. but when this was shorted we had a black and white picture but the picture still was flashing. since the jungle ic was already replaced it was assumed the ik pulses were ok from the jungle chip. the main concern is if the pulses are leaving the main board, and if the pulses are getting back to pin 27. this flashing condition indicates the ik feedback pulses are insμFficient some wsound in this path. further static check indicated a shorted zener diode d1792 in the ik bμFfer path on the crt Muller
SONY KV35V75
AA-2 		Horizontal sweep Unit has shorted l511 and q512. tech replaced these items and they burn out again Tech needs to replace d503,d502, d504 and c511, c512 the retrace capacitor along wit the other components. Muller
SONY KV36FV1
AA-2 		Horizontal sweep Kv36fv1 serial 9023663 unit has a sever over scan condition for horizontal sweep. tech did not measure any voltages in the pin amp circuit Tech needs to check on l511, q512, c513, c511, d502 & d504. one or more of these are shorted. Muller
SONY KV35V35
AA-2 		Horizontal sweep Kv35v36 product has a insufficient horizontal sweep. the sweep is reduced by 10 to 15% on the left side and 2 ~ 5% on the right. When going into the tech set up parameters and adjusting the hsiz value the sweep will replace to full sweep. monitoring the voltage at the collector of @q512 the voltage will vary from 27 volts hsiz set to 22. when hsiz is set to 48 q512(c) will drop to 16 volts. the set will have full sweep but it has a slight foldover condition on the right side of picture. it is recommended the tech replace the retrace capacitors c511, & c513 and the yokes"" capacitors c518, & c515. tech replaced all of the capacitors and the symptom "" Muller
SONY KV32S40
AA-2 		Horizontal sweep Kv32s40 ser 8053998 unit has sever over scan of horizontal sweep. tech replaced q512 shorted and q511 open all elements. Measuring the collector of q512 tech finds the voltage running in excess of -7 volts. the voltage on this transistor in inconsistent with the symptom on the screen of a narrow raster that is hourglass shaped. l511 and q512 are burning up. suggest the tech replace the following additional components d502, d503, d504, c511, and c513. Muller
SONY KV27S20
AA-2 		Horizontal lines Sony kv27s20. black banding across the screen. symptom does not appear when playing a tape. Gave tech modification on the kv27s20 to replace c1267 from a .047 to a .47 tantalum capacitor. Muller
SONY KV32S40
AA-2 		Horizontal Unit has severe over scan of horizontal sweep. tech replaced q512 shorted and q511 open all elements. Measuring the collector of q512 tech finds the voltage running in excess of -7 volts. the voltage on this transistor in inconsistent with the symptom on the screen of a narrow raster that is hourglass shaped. l511 and q512 are burning up. suggest the tech replace the following additional components d502, d503, d504, c511, and c513. Muller
SONY KV36FV1
AA-2 		Horizontal Unit has a severe over scan condition for horizontal sweep. tech did not measure any voltages in the pin amp circuit. Tech needs to check on l511, q512, c513, c511, d502 & d504. one or more of these are shorted. Muller
SONY KV35V36
AA-2 		Horizontal Unit has a insufficient horizontal sweep. the sweep is reduced by 10 to 15% on the left side and 2 ~ 5% on the right. When going into the tech set up parameters and adjusting the hsiz value the sweep will replace to full sweep. monitoring the voltage at the collector of @q512 the voltage will vary from 27 volts hsiz set to 22. when hsiz is set to 48 q512(c) will drop to 16 volts. the set will have full sweep but it has a slight foldover condition on the right side of picture. it is recommended the tech replace the retrace capacitors c511, & c513 and the yokes"" capacitors c518, & "" Muller
SONY KV27S25
AA-2 		High voltage Unit has no high voltage. led in front is flashing on and off after power up. Tsound does not seem to be any horizontal drive to the horizontal drive transistor. defeating the horizontal output by removing the collector connection still will not allow horizontal drive to appear at ic351(37). this pin is sitting at nearly 8.5 volts, not the 3 volts it is supposed to be. also ic351(38) the hoff/afcpin is at 3.3 volts which is normal. unit has a bad ic351 cxa2025as Muller
SONY KV36FV1
AA-2 		Geometry Kv36fv1 serial 9032273 tech needs yoke modification for the yoke upgrade. Gave tech bulletin 387r2 relating to the shoulder roll off Muller
SONY KV32S45
AA-2 		Geometry Kv32s45 serial 8102913 picture is rotated clockwise by 1/4 inch. tech claims this tube does not have a pix tilt circuit or rotation on the crt bell Tech needs to break the bonding of the yoke ant reposition the yoke. Muller
SONY KV27V65
AA-2 		Geometry Kv27v65 serial 8027393 customer complaint is a slight geometry error or tilt in the lower right hand corner of the screen. it causes a symptom of horizontal lines that are not perfectly straight. in this case the lines are elevated by at width of 2 horizontal lines. This television is operating within specifications. the geometry errors should not deviate more than 1/8 of an inch across the length of the horizontal line. horizontal tilt can be no more than 1/8 of an inch. this television beats this measurements. tsound is nothing i can recommend to the tech to do to improve on the geometry of this receiver. Muller
SONY KV27S10
AA-2 		Geometry Kv27s10 serial 723009 unit has symptom every time the set looses power the geometry memory is lost vpos, vsiz, hsiz. pamp drop at least 10 points each. when resetting these values and writing them to memory the they will be erased as soon as power is removed Tech needs to replace the eprom??. i002 corrected the problem Muller
SONY KV36FV1
AA-2 		Focus Kv36fv1 serial 9046442 unit has poor focus on left and right side of picture The set has a dynamic focus error. tech needs to see if the dynamic focus circuitry is running correctly. also before any hardware is tested the parameters of hamp and dcsf should be adjusted to see if the dynamic focus is effected. when adjusting these parameters the values get the best focus when each is mixed out to 60. the focus becomes poor 2 inches from the left side of the screen and 5 inches from the right side of the screen. Muller
SONY KV36FV1
AA-2 		Focus Kv36fv1 customer is running the television on a dss satellite system. customer claims the set looses focus in the picture when tsound is a lot of detailed movement. This is caused by the 10 megabit throughput limit of the dss video compression format mpeg3. in order for the compression to work correctly the digitization process only updates the data that is changing. background data is not updated as regularly as the foreground data. hence when everything must get updated. but the max data throughput is finite. the entire video waveform will not be accurately represented, instead the smaller detailed portions of the picture will begin to have larger pixels so not to exceed the max data. this is why to the eye the set appears to loose resolution or picture detail. this is normal. Muller
SONY KV36FV1
AA-2 		Dead Unit is dead. after talking to customer they explained that they had a power surge caused by a car hitting a power pole. The set was completely dead. vdr602 was noticeably burned up. cutting this device our of the circuit found that it was open. however the device is connected in the circuit like a metal oxide varistor. it should measure open since it is in parallel with the a.c. line. it was discovered that no other shorted components could be found in the primer of the power supply. main line fuse was not blown! checking the raw ac voltage on the ac line filters t601, and t602 find that we have no ac voltage on the output of t602 but present on the input side. isolating the open coil and removing the defective vdr602 allows the set to turn on and operate correctly. tech will need to replace t602 and Muller