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Make	Model	Symptom	Problem
SONY	KP5040	No red vertical convergence, replaced crt neck ass'y	The red vertical convergence does not move. found open coilon the crt neck assembly.
SONY	VTX1000R	Hiss noise in audio	Slight hissing noise in audio only on channel 13.
SONY	KX2501	Shut down after warm up, q1520	Unit would go into shut down after warm up. the shut down wastraced to the hold down circuit, where the horizontal osc. output wasdefeated. inspection revealed a voltage being developed at collector ofq1520. all other voltages and devices checked ok.
SONY	KX2501	Dots in picture, replaced crt	With no input signal, even with the brightness and picturecontrols completely off the crt exhibits about 12 white dots distributedin a random pattern over the entire face of the crt. these dots willrandomly burst in a sort of fireworks pattern, dispersi
SONY	KX2501	Unable to control contrast, replaced c1568	Unable to control contrast. using pix control found abl #3transistor reading 3.8vdc, should be 25.2vdc, isolated problem to c1568.capacitor was read 200Ω.
SONY	KX2501	No picture, replaced r761b	Lose video immediately after turn on. traced video info. upto the base of q704 and no further on c board. voltage on collector ofq713 was about 7v dc and it would not allow q707 to conduct. replacingq713 would allow video to be present about 20 second
SONY	KV4100	Parts availability	Referring to page 74 of the s/m, servicer claims that mountedon the capstan shaft above the flywheel there is a plastic gear which isnot shown in the s/m. my manual does not show such a gear either. -hq comments: the plastic gear in question is a part
SONY	KV2648R	Dead, replace r616 and q603	Set would operate for approx. one to two min. it would thenblow the converter out in power supply and the line fuse. found r616open and q603 leaky from collector to emitter.
SONY	KV2648R	Picture distortion, resoldered 135v rectifier	Picture would expand and contract with the setting of thepicture control. there was also video noise in the picture and a highpitched faint arcing sound.
SONY	KV2647R	Snowy picture, replace d012	Unit displayed snow on all channels. inspection revealed b+to prescaler was about 5v dc instead of 6.8v dc. zener diode in basecircuit of 6.8v regulator was defective.
SONY	KV2645R	Sound distortion	Two transformers were replaced the same week on two different units for excessive vibrations or singing. wedging did not help.
SONY	KV2643R	No tuning, replaced c519	No programming any channels on manual or auto. you could setthe stations appear on the screen but they would not be programmed in thememory. during auto program, the neons would not light up in sequence asthe set tuned through the bands, only channel 2
SONY	KV2602	Intermittent shut down, replaced cracked hvr block	This unit would intermittently shut down. the hvr block had acrack across the bottom.
SONY	KV1947R	No tuning most channels, resistor change	Kv-2649r will not tune most channels, only 5 and 6. kv-2647rwill tune some of them, some sets will and some of same model will not.
SONY	KV1945RS	Dead, d603g	Set will not turn on.
SONY	KV1941R	Dead, replaced open r812	This tv was dead when servicer received it. replacing thegcs, q901, f602 and t801 restored both picture and sound. however, therewas severe ringing on the left side of raster. all sweep derived voltageslooked clean on scope. further troubleshooting r
SONY	KV1922	No color	No color, found no 3.58mhz output at cx172. traced problemto capacitor c330 (leaky, reading 300Ω).
SONY	KV1730R	Dead	This unit lost all signal at the 3rd stage of the remotepre-amp. we found the capacitor in the tank circuit off the collector ofq1103 to be shorted.
SONY	KV1546R	Intermittent no color, replaced l304	This unit was losing color intermittently. servicer reportshe has had 2 other units with the same problem.
SONY	KV1511	Darker picture on the left side of the screen	This unit had a darker picture on the left side of the screen.the screen was divided almost down the middle with the right side normal.scoping the 110v line revealed about 35vpp of horiz. noise c528 was foundto be defective.