Repair Tips

Search:
Results: 87709

Make	Model	Symptom	Problem
SONY	KP5040	Test signal interference, install cap	Cross hatch bleed through on kp-5040. bar pattern when view-ing a weak incoming active channel. this condition sometimes can be moreeasily observed by setting the tv line switch s907 to the line position.in this configuration a faint bar can be seen ru
SONY	KP5040	Picture distortion (oscillation), add cap	Oscillation (snivet) down center of screen noticed on set inclose proximity. also had white horizontal lines similar to ignitionnoise.
SONY	KP5040	Color distortion, replaced ic3301 and crt	Red very weak, unable to set gray scale. bias wrong onpicture tube. changed ic3301 corrected bias, but red picture tube bad,had to change it too.
SONY	KP5020	Incorrect convergence	All three colors would not center properly. found d5501shorted on da board. also schematic is labelled wrong, voltage afterresistor r5597 should read +5 volts but schematic indicates +12vdc onda board.
SONY	KX2501	No color, replaced ic1302	No color under any input, faint retrace lines in black andwhite picture. sometimes flickering of colored snow but out of colorsync.
SONY	KV9000	Tv would not come on	Tv would not always come on. found c508 intermittently open.
SONY	KV2648R	Color confetti on b/w, adj cv301	Color confetti on b/w telecast.
SONY	KV2648R	No picture, replaced f601, q602 and q603	This unit keeps on blowing f601 and q602. isolated problemon the f board by disconnecting the 135v b+ and supplying a separateexternal b+ (tp92 was the ground return) to the a board. this makes thea board work. hv normal but no raster. then by using
SONY	KV2648R	No manual operation, replace c4038	You cannot turn set on or off by manual button. set wouldwork ok with remote. i found no logic high at pin 33, ic4001. capacitorc4038 was shorted on mz board.
SONY	KV2648R	Bottom of screen blank out, replaced cx841	Bottom and left side area of the screen blanked out. foundcx841 defective.
SONY	KV2647R	Black line on the screen, replace v out ic502	After set would warm up a black line about 3/8 inch (veryfaint) would appear in the center of screen.
SONY	KV2647R	No operation, h out q-502	No sound, no picture. found horizontal output shorted.
SONY	KV2643R	Vertical bars on the screen, replaced c539	Vertical bars on left side of screen. almost like ringing.horizontal spike riding on b+.
SONY	KV2602	Vertical jitter, replaced c511	After 5 to 10 minutes on, vertical jitter is noticed andbecomes increasingly severe. sometimes a brighter line is apparent acrosscenter of screen (slight folding). found c511 2.2ufd at 20v tantalumcapacitor very slightly leaky (100k).
SONY	KV1943R	Intermittent sound, replaced t207	Sound intermittently goes dead. troubleshooting indicates that the sound is not passing through the if section. isolated problem to t207.
SONY	KV1923	Picture noise	Retrace line.
SONY	KV1923	Dead	Dead set. found defective the following parts f602, q901,d514, d502. after replacing defective parts it was found r560 and r561were getting hot. traced cause to an open contact between circuit boardand l502 the hlc coil.
SONY	KV1914	No uhf	No uhf. found b-e of q103 shorted.
SONY	KV1913	Sound only on channel 5	Intermittent or garbled sound only on channel 5. because theproblem was only on channel 5 the audio ic and outputs were ruled out.monitoring q107 it was found to be muting on and off when on channel 5.nl2204 was then replaced and the problem was cured.
SONY	KV1912	Channel no change	Cannot change channels, push buttons will not light whenselected. found 35v missing at pin 10 of ic033.