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Sony Repair Guide: Common Issues and Fixes

Brand Model Fault Detailed Problem Solution By
SONYPSLX510
Incorrect ass'y numberCould not locate part number for stator assy. found on page27 the assembly is numbered 129. it should be 126. -hq comments: will issue a t/n and s/b.
SONYXRM10
Very low, yet undistorted am band audio levelAudio ok coming out of am ic, but would not pass thru c-60 onam pc board.
SONYCFSF11
No recordPause is engaged before record. indicator lights but recordlinkage is not engaged. the record trigger lever is jarred off recordlever a (see p.10 of the supplement #1). -hq comments: replacement of forward lever is necessary. the problemcomes from th
SONYSL25
No p/b or f/f functionsNo f/f mode at all. would enter rewind mode whenever the p/bmode was entered. the sensor leads resistance would change from 4Ω to20Ω whenever the leads or the pc bd of the sensor was agitated.
SONYKX2501A
All blue raster, retrace lines, very low video level, q1302Crt raster was all blue with faint retrace lines and very lowvideo level. we were unable to reduce the blue level with crt or bright-ness controls. dc voltage checks allowed me to trace problem to a leakytransistor, q1302 on bd board.
SONYKP4600B
No green vertical sweepWith set on, there was no green and display bar (which wasblack), rolling vertically. system looks like a problem in the picturetube area, but found no green vertical sweep. with loss of verticalsweep, there is no horizontal line, because itclue was th
SONYSLHF300
No powerUnit would not power up. replaced ic301 (timer) but ic wouldnot reset, so problem was not resolved.
SONYD5
Blown transistors and ic (sled circuit)Unit was brought in for service due to defective sled motorgears. upon inspection, we discovered that ic508 and q502-505 were burntseverely. the chip transistors disintegrated. ic508 is cracked and brownin color.
SONYBMC550
Incorrect p/n page 148Typo in manual, page 148. -hq comments: correct p/n sk-3 board (complete) a-7060-078-a ds-10 board (complete) a-7060-098-a ds-10 board part number is correct on page 175 in the s/m.
SONYKV2602
Only tunes low channels, replaced non sony q008Vc voltage at tuner would only go up to 10vdc.
SONYTCFX505R
Controller chips differenceWhen ordering ic501 and ic505, tc #9310n-032 (8-759-201-86)and tc #9310n-033 are sent instead of -021 and -022. the serial # showsthe unit falling into the former type but icalso fiche crosses to the new numbers. are the two compatible? -hq comments:
SONYKV2680R
Audio exists at vol zero, replace ic-1107When the audio level is turned all the way down, you can still hear audio.
SONYBMC550
Replacement numbers for cr2025 batterySince we do not have sample cr2025 battery, can you advise theduracell or eveready replacement numbers? -hq comments: the numbers are as follows: sanyo cr2025 duracell dl2025
SONYKV1515
No high voltageNo high voltage, +115v up to +142v. half of the dialindicators light at the same time. sometimes the tv would work normal.
SONYKP5040
Cable interference, soldered tuner, prescaler and ant swFine diagonal lines on ch. 4 spaced about one inch apart.
SONYICF200W
Ref #503 and 504 reversedRef. # 503 and 504 reversed. should be + board a p/n 1-605-271-00 - board b p/n 1-605-270-00 -hq comments: we will issue a t/n and s/b.
SONYTAAX44
Missing p/nPage 27 of the service manual, location 2-a. per kc, thepart number should be x-4882-013-1. this part number is not given in theservice manual. -hq comments: the part number is correct. will issue a t/n and s/b.
SONYTAAX44
Missing part numberNo part number in service manual nor in semiconductor book.you issued hifi bulletin #166 (july, 1983). -hq comments: the part number is 8-759-100-43 as in the hifi bulletin#164 issued in march 1983. the mpu w/-200 has been changed to -213.
SONYXM100
No audio outputNo sound. found power amp transistors q411 in left channeland q512 in right channel shorted e to c. after replacing transistorsstill had no audio out. further checks showed +3v on both e and c of q302(remote switch). found r305, 100 kΩ res. open.
SONYKV1922
Crescent moon effectWhen set was first turned on, you have a full picture. witha crescent effect on the left side of the picture, it was about 12 incheshigh. after approx. 1 min., this dark area would fade and then thepicture went into a christmas tree effect with about 4