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Sony Repair Tips




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Search: sony
Results: 20072
Make Model Symptom Problem Solution By
SONY TCK88B
Loose wire between servo board and syscon board Counter was intermittently not advancing. determined thatic602 derives count from supply reel revolutions using output of q536 andq535 on servo board.
SONY TCFX77
Missing part # in manual There is no p/n for the capacitor c134, 234 (56pf/500v),which are connected to the r/p head, in the service manual.
SONY TCFX44
Defective relay Erratic system control operation. when record button isdepressed, unit will intermittently enter rewind mode after 2-3 sec(record deactivates). results from high resistance of relay contacts.
SONY SPP11
Service manual instructions P31. lacking a linear detector, i adjust rv2 to energizebase relay.
SONY SPP11
Service manual instructions P10 of service manual instructs tech. to turn rv6 ccw forfreq. adjustment. it is my belief that it should read rv5, instead.
SONY PSX800
Glue on s/n 800439 Intermittent 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
SONY PSX800
Open lead in s/n 802218 Intermittent 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.
SONY KV1222R
Bright picture with retrace lines Set would come on ok when very cold. then after abouta minute, pix would get very bright and have retrace lines.
SONY STRAV880
No power - unit dead Unit had no power - completely dead.
SONY D7
Insufficient line muting Insufficient 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
SONY KX2501
Dead, connector shorted,also replaced q652, q651, and q653 Set came in dead. found connector shorted and q653 and q651reading 40Ω between base and emitter (forward and reverse the same).
SONY RM708
No commander operation This remote commander produced no infrared output. thetransmit indicator did light.
SONY KV2650R
Aft drift, leaky q024 When 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.
SONY KV2649R
No sound, replace ic605 No sound in left or right channels.
SONY KV2648R
No bar display, replace shorted q4028 No 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,
SONY KV2647R
White h lines on the picture, replace q001 The 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.
SONY KV2647R
Dark picture, shorted c725 This unit had a dark picture and the picture control did verylittle. found c725 shorted.
SONY KV2142R
No picture, replace c2213 33v line shows video on dc of about 1 1/2v. after warm-uptuner drifts off channel with or without afc.
SONY KV1953R
No tuning operations, replace ic003 Channel up or down inoperative. also unable to erase anychannels. no logic change at pins 1-4 on ic003.
SONY KV1952RS
No function, replace x2001 Unable 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.