TV Repair: Common Faults and Solutions.

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Repair Guide: Common Issues and Fixes

Brand	Model	Fault	Detailed Problem
SONY	KV1945R	No picture, c1008 in prescaler shorting to frame	The 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
SONY	KV9300	Incorrect brightness	The set has an excessive brightness. the screen control ishigh and cannot be adjusted, r706 is open.
SONY	KV9300	Retrace lines	Retrace lines, no screen control.
SONY	KV2645R	Audio cracking, replaced t207	Intermittent audio cracking.
SONY	KV2643R	No sound	No sound, picture ok.
SONY	KV2643R	Channel lock, replaced l001	Right 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).
SONY	KV1945R	Poor remote operation, resoldered x002 on md board	Poor response from remote control. poor range - missesfunctions.
SONY	KV1945R	Poor remote operation, resoldered shield to n board	Weak remote range. this unit had poor shield ground on then board causing the short range of remote control.
SONY	KV1913	No audio on ch 10-12	No audio on channel 10/12 or very low sound. found channelind. lamp for channel 10/12 defective.
SONY	KV1545R	Remote operation range too short, open ground "n" board	This unit had poor shield ground on n board causing shortrange on remote when set was on.
SONY	KV1221R	Picture distortion, replaced c524	Picture pulled up 3 inches on bottom of the screen and upperright hand corner blanked. found c524 off pin 13 ic301 was installed withpolarity reversed.
SONY	KP7220	Incorrect blue convergence, replaced d5320	This unit had a blue convergence problem. the blue verticallines were wider than the red or green.
SONY	KP7200	Incorrect tuning operation	Tv would scan but would not stop on stations.
SONY	CFS45	Defective side plates	Plastic handle side plates on this model brake. handle side plates may not be strong enough to carry weight of this model under allstress conditions.
SONY	KV8000	Poor h sync	Set displayed poor horizontal sync.
SONY	KV1945R	Color distortion, replace ic301	No blue, yellow picture. base voltage at q701 was 0 volts.output at pin 28 at ic301 0 volts, input to ic good.
SONY	KV1913	No picture	Loss of vertical deflection.
SONY	KV2643R	Shut down, removed l810	This unit would shut down by itself. the picture wasexpanded in size (a lot of overscan). the hv was 3kv lower.
SONY	KV2643R	Sound no mute during change, replaced q042	Sound would not mute during channel change. checked pin #13of ic032 positive pulse was present during channel change, therefore,q042 was suspected.
SONY	KV2643R	Clock display dims, replaced display	Clock display dims when touched by hand. display flickers when someone walks by tv.