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Sony Repair Tips




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Search: sony
Results: 20072
Make Model Symptom Problem Solution By
SONY SL2700
Capstan running too fast The capstan was running too fast on this unit. all otherfunctions were ok. we found the fg1 input to the servo ic to be very low.the problem was caused by incorrect bias at the fg amp/ic306 p9, we foundc340 to be leaky. -hq comments: we received info.
SONY SL2700
Clogging video heads Lately we have been seeing a large number of units comingthrough with dirty video heads. sometimes the symptom is in the form of aslight vertical jitter. other times it is a traditional snowy picture.cleaning resolves the problem for only a short time.
SONY SL2710
No beta hifi playback This unit had no beta hi-fi playback. we found q002 to beopen on the af-2 board (9v pb switch). also changed was c002 as itappeared to be somewhat leaky.
SONY KX2501
Jail bars, replaced c1527 Picture was slightly reduced in brightness and there werenumerous dark vertical bars across the raster, about one inch in width.i suspected some sort of oscillation in the horiz. output circuit,possibly caused by poor capacitor filter action. scoping tp
SONY CFS5000
No sound on tape playback No sound on tape playback. other functions ok. ams seems towork. in play (with cassette in) ams solenoid occasionally kicks.
SONY WMF8
Buzzing noise Buzzing noise through head phones in tape mode.
SONY KV2670R
No brightness control, leaky d-301 Unable to adjust brightness. found abl clamp diode d301reading 100Ω both directions (forward and reverse).
SONY CDP101
Sled goes to one end with power applied With disc inserted for 2 to 3 seconds, it would eject disc.
SONY TCFX510R
No record This unit came in with no record function. rec led did notlight up because pin 35 of ic601 stayed low in rec mode. since this unitis old type, i ordered ic601 with the part #8-755-640-71. however the ici received from npc was a new type cx-564-072.
SONY SLHF300
Drifting rf switching position This unit shows the same problem as sl-2300/2400 series. rfswitching in picture of t/n #b0060 modifies to correct the problem in2300/2400 series. do we have a similar solution for sl-hf300? drum drivecircuit q15-q20 in sl-hf300 appears to be very simi
SONY KV1911
Ringing on left side of screen Ringing on left side of screen.
SONY KV1961
Vertical jitter only on ch 10 off the air Vertical jitter. only on ch. 10 off the air. worked normalon cable. transmitter was approx. 10 miles from dealer.
SONY HVA220
Ac adapter no longer available Customer purchased hvc-1000, ac adapter, cma-100. video is okbut audio was distorted. 800 # suggested him to purchase hva-220.
SONY TCFX707R
No tape transport or int tape transport No tape transport or int. tape transport.
SONY TCK60
Part number missing When ordering tape counter for tc-k60, service manual showspulley attached to the counter, however when received the pulley is notwith counter.
SONY KX2501
C709 on "c" board reversed In troubleshooting routine, i noted that c709 polarityindication on the pc board is reversed, likewise on the service manual.the positive element is shown going to gnd. this is incorrect. -hq comments: we will publish correction on this.
SONY XO5
Rev play problem When in reverse play the forward reel would be engaged andturning against reverse reel, therefore tape did not move.
SONY CDX5
Unit would not drop disc into play position Unit would take in disc but would not drop disc into playposition, the disc would then be ejected. this problem would occur onlyabout 50% of the time.
SONY KV2680R
Intermittent shut off, cold solder on c-1182 Power relay would intermittently begin to chatter and setwould lose raster and audio. the 18.9 volt line would drop to approx.14 volts when this happens. found one leg of filter c1182 had a coldsolder connection.
SONY PSFL9
Eccentric loading gear Loading gear was slightly eccentric which cause the module todrag when loading.