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Make	Model	Symptom	Problem
SONY	KV1923	No picture, has sound, replaced c516	No picture, just sound.
SONY	KV1922	Picture noise	Three inches wide bar at right side of screen top of bottomonly on hbo cable channel and only at customer's home only on thisparticular unit, other units tried and work fine. servicer blamingcable co. found 150pf capacitor between q512 collector and gr
SONY	KV1915	Picture distortion	One and half inches of top of picture is black.
SONY	KV1912	Tuner locked on ch 2	Tuner locked on channel 2.
SONY	KV1910	Picture stretching after warm up	Picture stretches vertically after about one hour operation.
SONY	KV1512	Dead	This unit initially appeared to have a shorted sg613 and2sc867. upon powering up the set with a dc supply it was noticed thatthe waveforms were irregular. closer examination revealed r522 hadchanged in value.
SONY	KP7220	Keystone, replaced d5313, d5312, q5537	Keystone effect on all three tubes. pix normal at top butnarrow at bottom.
SONY	TV790	H picture distortion	Horizontal frequency changes after short warm-up.
SONY	TV123	No picture	Q502 runs red hot for about one week and then fails, causingno raster.
SONY	KX1901	V foldover on the bottom	Severe foldover on bottom.
SONY	KV2648R	Gray bar on the screen	Gray bar very dark on left side and becoming lighter lookingtoward right side of crt.
SONY	KV2647R	Jailbars, poor ground on "s" board	Jailbars present on left side of screen more pronounced onthe higher channels. found poor ground on s board opposite the groundingposts from the tuner.
SONY	KV2647R	No vertical sweep, replace rv2206	No vertical sweep. voltage at ic501 pin 11 should be 6.3 vdc.actual reading was 2.2 vdc. found vertical hold control had an 8000Ωreading center tap to case at all times.
SONY	KV2643R	Vertical line on the picture, remount q701	Vertical line appears in the center of screen on brightscenes. found q701 installed wrong at factory. c was connected to e.b was connected to c and e was connected to b.
SONY	KV2602	Picture blanking, adj jerrold cable box, vari-loser	When using models with 30p chassis on cable systems thatscramble the pay channels (by removing the sync pulses at the head end andreinserting them thru a converter) the sync is sometimes compressed tooclose to blanking. this apparently reacts with the k
SONY	KV1946R	Shut down, replace ic601	Set turns off by itself after 45 minutes.
SONY	KV1946R	Sound and picture distortion, replace q051	Set would not go all the way off. when turned off, pix woulddim, sound goes off. found q051 relay drive transistor completelyburned out.
SONY	KV1945RS	Intermittent sound, replaced ic202	Unit had very intermittent sound.
SONY	KV1945R	Sound pop noise, replaced c226	Sound would pop off and on intermittently.
SONY	KV1922	No low vhf	No low band vhf-uhf ok. vhf high ok. no negative 6 volts atvhf hi terminal of tuner apply external -6 volts could tune in low band.q102 vhf hi drive had no negative voltage at base troubleshooting found-12v rectifier being loaded.