SONY TV Repair: Common Faults and Solutions.


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SONY Repair Guide: Common Issues and Fixes

Brand Model Fault Detailed Problem Solution By
SONYKP5000
Poor purityColor purity problems around edge of picture. problem was caused by flaking of phosphor edges on all three crts.
SONYKV2645R
Incorrect operation, replaced x002When master power switch turned off and unit allowed to cooldown, it would take approx. 2-3 hours for any function to operate afterapplying power. cooling the ceramic osc. x002 would cause unit to shutdown and all functions became inoperative.
SONYKV2645R
Picture dark with excessive color, replaced r-751Color overload or flaming color. color was especially extensive mostly in the red spectrum. even when the color was turned down, some overload still existed.
SONYKV1945R
No audio, replaced open r232 and shorted q205, q206Not audio.
SONYKV1942R
Tuner drifts, replaced zener d2103Tuner drifts off channels and several lights are lit at thesame time. 18 volt line to tuning circuits would be low, about 10 vdc,and problem would occur. d2103 was zenering at lower voltage causing18v line to drop.
SONYKV1913
Dark pictureDark picture.
SONYKV1913
Sound distortionAfter warm-up sound would distort and change in volume.
SONYKV1714
Set locks on ch 2Set locked on ch. 2 defective cx804 (ic033) decreasing 35vsupply.
SONYKV4000
No tuning on vhf lowNo automatic nor manual tuning on vhf low, vhf high anduhf band. found no voltages at vc terminal of tuner - resistancemeasurement showed short to ground - tracing back found short at m1 plugon m board - pin 8 shorted to pin 9.
SONYKV2645R
Snow picture, replaced x001Intermittently, tv reception would stop except for a verypoor channel 6, snow on all other channels. address line a always high(11.9v) regardless of channel selected.
SONYKV2643R
Picture shifts, demagnetized crtGraphics were shifted to the right. when unit was taken toservice shop and center-cross generator placed on set the centering wasoff approx. 2 inches to the right. all associated circuitry was checkedand found to be in proper operating condition. repl
SONYKV2643R
No picture, replaced c607The following parts were bad in this set: q901, q902, q601,r605 open, r609 open, r232 open, connector a-10 on pc board arcing.after all these parts were replaced, the set would come on and thepicture would blink severely, both horizontally and verticall
SONYKV1945R
No picture, c1008 in prescaler shorting to frameThe following notes were made in determining problem. 1) nowave train at pll in, tp59. 2) no voltage on pin 15, ic003. 3) voltageat tuning point on tuner went to 31.5v and would not vary. cause - c1008on prescaler was shorting to adjacent frame on p
SONYKV9300
Incorrect brightnessThe set has an excessive brightness. the screen control ishigh and cannot be adjusted, r706 is open.
SONYKV9300
Retrace linesRetrace lines, no screen control.
SONYKV2645R
Audio cracking, replaced t207Intermittent audio cracking.
SONYKV2643R
No soundNo sound, picture ok.
SONYKV2643R
Channel lock, replaced l001Right after turn-on, tuner would lock on a channel. wouldnot change channels manually or by hand unit. it had no clock on pins12 and 13 of ic001 (volume and on/off ok).
SONYKV1945R
Poor remote operation, resoldered x002 on md boardPoor response from remote control. poor range - missesfunctions.
SONYKV1945R
Poor remote operation, resoldered shield to n boardWeak remote range. this unit had poor shield ground on then board causing the short range of remote control.