Sony TV Repair: Common Faults and Solutions.


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Search: Sony
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Sony Repair Guide: Common Issues and Fixes

Brand Model Fault Detailed Problem Solution By
SONYKV1722
Picture blankingThis unit was in full blanking. the b+ regulator was workingfine. we found the 11v zener off the base of q606 (evp-1) to bedefective. the zener threshold was approx. 5v.
SONYKV1515
Static related damageThis unit has now been repaired 3 times with static relateddamage to the tuner as the problem. a visit to the customer's homerevealed nothing out of the ordinary. we then carefully gift wrappedthe tuner cluster with 3m electric tape #1245 and grounded
SONYKV1515
Defective vc driveWe have found many units with defective vc drive transistors.the transistor generally fails within the first 30 days of operation.this is not a 2sc9450r 2sc1364 transistor. in fact i have not seen thisvariety in a sony product.
SONYKV1510
Picture distortionThis unit had bright bars at the left and right hand side -about 1 wide. the balance of the picture was close to normal althoughlacking detail. we found c532 to have opened up. this filters the b+ tothe video outputs.
SONYKP5040
Mechanical mis-operation, lubricated piston armsMirror would jam in either the inward or outward movement of the mirror. there was a hue shift in the center of the screen.
SONYKP5040
Channel drift off station, replaced leaky c209After about 10 minutes, channel would drift off station.found c209 had resistance.
SONYKX2501
Blanking display, replaced r472, sm error r472 labeled r453Unit displayed blanking problem. 2 wide bar on the left sideof the crt. i could find no problem except base of q401 was -1v (printcalls +0.3). i found r472 missing.
SONYKX2501
No picture control, replaced ic13021) rgb lines in the picture, red shaded area on the left sideof the screen which would change to green with the hue control. 2) nocontrol of picture, volume control would cause picture to vary and at aset point on the volume setting the picture control
SONYKX2501
Shut down, replaced flybackUnit would shut down every one or two minutes after 2 hourswarm up. i could not find anything wrong, but read fdrs and noticedflyback could be cause.
SONYKX2501
Shutdown, replaced h stat blockH. v. shut down activates intermittently.
SONYKV8100
DeadNo picture or sound when power was turned on. this symptomoccurred when unit was cold or after setting for several hours.
SONYKV2649R
Dead, replaced ic001Set would turn on but no function could be activated. if youpush for example ch. up it would immediately change 2 or 3 channels thenwould come back to the ch. it was on just before last turn off.
SONYKV2649R
Dead, replaced ic001Set would turn on but no function could be activated. if youpush for example ch. up it would immediately change 2 or 3 channels thenwould come back to the ch. it was on just before last turn off.
SONYKV2648RS
Missing r602Servicer found r602 missing from board. looked like it wasnever soldered, as the holes were clean.
SONYKV2643R
Intermittent shut down, replaced h stat control unitOccasional slight arcing could be heard and set would inter-mittently go into high voltage shut down condition. inspection of h-statcontrol unit showed cracks in the plastic housing around the bottom cornerwhere one of the ground leads exists the unit.
SONYKV2145R
Retrace lines on the screen, replace ic502Set had 6 or 7 retrace lines at top of the screen. i foundthat by cooling ic502 the lines disappeared.
SONYKV2145R
Intermittent channel change by itself, q007Intermittently self initiates rapid channel changing.
SONYKV1948R
Beat interference, normalBeat interference visible on the screen during low vhf bandoperation. the beat pattern is composed of individual dots such as onewould see from digital interference. it only shows up on a weak rabbitear signal. it is the second harmonic of the power s
SONYKV1913
Intermittent horiz. whistleThis unit had a very intermittent horiz. whistle. we foundt502 to be vibrating.
SONYKV1710
Intermittent loss of pictureHighly intermittent loss of picture and sound leaving onlygray raster. loss would be from seconds to hours with no patterndetectable.