Sony TV Repair: Common Faults and Solutions.


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Search: Sony
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Sony Repair Guide: Common Issues and Fixes

Brand Model Fault Detailed Problem Solution By
SONYPSX800
Glue on s/n 800439Intermittent cue up/down malfunction. symptom was no dampingaction. checking output of vert. mfb det coil with scope showed inter-mittent no signal or noisy erratic signal. tan glue on the solderpads of the coil's pcb in the bearing assy caused proble
SONYPSX800
Open lead in s/n 802218Intermittent cue up/down malfunction. symptom was no dampingaction. checking output of vert. mfb det coil with scope showed inter-mittent no signal. an open lead, confirmed withΩmeter was the cause.
SONYKV1222R
Bright picture with retrace linesSet would come on ok when very cold. then after abouta minute, pix would get very bright and have retrace lines.
SONYSTRAV880
No power - unit deadUnit had no power - completely dead.
SONYD7
Insufficient line mutingInsufficient line muting. when pushed, line output wasreduced by better than 40db but not totally muted. signal level slowlydropped off from this point and finally muted completely after severalseconds. the effect was not noticeable on headphone outpu
SONYKX2501
Dead, connector shorted,also replaced q652, q651, and q653Set came in dead. found connector shorted and q653 and q651reading 40Ω between base and emitter (forward and reverse the same).
SONYRM708
No commander operationThis remote commander produced no infrared output. thetransmit indicator did light.
SONYKV2650R
Aft drift, leaky q024When you tuned a station it appeared as if the aft wassearching before it locked in on the strongest portion of the signal.vc was changing slightly before it locked.
SONYKV2649R
No sound, replace ic605No sound in left or right channels.
SONYKV2648R
No bar display, replace shorted q4028No bar display in any function except if volume was atmid-range. picture control would increase or decrease length of bardisplay. with color, hue or brightness there was no bar display.pressing hue, bar was all green. checking input to counter reset,
SONYKV2647R
White h lines on the picture, replace q001The picture had white horiz lines producing a venetian blindeffect. there was also a buzz of 7-8khz in the sound. we found that thevc line was not being properly filtered. found q001 (fet) in the activefilter to be defective.
SONYKV2647R
Dark picture, shorted c725This unit had a dark picture and the picture control did verylittle. found c725 shorted.
SONYKV2142R
No picture, replace c221333v line shows video on dc of about 1 1/2v. after warm-uptuner drifts off channel with or without afc.
SONYKV1953R
No tuning operations, replace ic003Channel up or down inoperative. also unable to erase anychannels. no logic change at pins 1-4 on ic003.
SONYKV1952RS
No function, replace x2001Unable to control volume picture or channel change. led wouldnot light. found osc crystal low in amplitude at ic2001. freezingcrystal would change amplitude from 20mv to 2v.
SONYKV1946R
Dark picture, r715 openPicture was dark. measured screen voltage. range was from105-185 vdc. found r715 reading in the megΩ.
SONYKV1922
Picture distortionSet had pincushion problem. traced problem to q514. signalat collector was distorted.
SONYKV1915
Dark picturePicture was very dark. no brightness and no 900v to crt.
SONYKV1914
Tuning driftStations could be locked in, but then would drift off. pin 10of ic201, aft amp out was floating, and voltage was varying.
SONYKV1747RX
Dark pictureColor information was present but there was no luminance atoutput of ic341. input signal was ok.