Sony TV Repair: Common Faults and Solutions.


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Sony Repair Guide: Common Issues and Fixes

Brand Model Fault Detailed Problem Solution By
SONYWMF8
Buzzing noiseBuzzing noise through head phones in tape mode.
SONYKV2670R
No brightness control, leaky d-301Unable to adjust brightness. found abl clamp diode d301reading 100Ω both directions (forward and reverse).
SONYCDP101
Sled goes to one end with power appliedWith disc inserted for 2 to 3 seconds, it would eject disc.
SONYTCFX510R
No recordThis 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.
SONYSLHF300
Drifting rf switching positionThis 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
SONYKV1911
Ringing on left side of screenRinging on left side of screen.
SONYKV1961
Vertical jitter only on ch 10 off the airVertical jitter. only on ch. 10 off the air. worked normalon cable. transmitter was approx. 10 miles from dealer.
SONYHVA220
Ac adapter no longer availableCustomer purchased hvc-1000, ac adapter, cma-100. video is okbut audio was distorted. 800 # suggested him to purchase hva-220.
SONYTCFX707R
No tape transport or int tape transportNo tape transport or int. tape transport.
SONYTCK60
Part number missingWhen ordering tape counter for tc-k60, service manual showspulley attached to the counter, however when received the pulley is notwith counter.
SONYKX2501
C709 on "c" board reversedIn 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.
SONYXO5
Rev play problemWhen in reverse play the forward reel would be engaged andturning against reverse reel, therefore tape did not move.
SONYCDX5
Unit would not drop disc into play positionUnit 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.
SONYKV2680R
Intermittent shut off, cold solder on c-1182Power 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.
SONYPSFL9
Eccentric loading gearLoading gear was slightly eccentric which cause the module todrag when loading.
SONYPSFL9
No function controlNo function control and erratic display.
SONYKV1205
Poor color low brightness, replaced c801Picture looks like gray scale off, as with bad picture tube.screen voltage to c board reads 700v, should be 900v. b+ to c board reads117v, should be 178v. brightness control will not turn brightness downall the way.
SONYWMF10
Speed way too fast (intermittent)The speed in play would intermittently increase drastically.flexing the main board in the servo area would cause the problem to comeand go.
SONYKV2680R
No vip or timer function, v size adj cured vipIntermittent vip, sometimes no vip function at all.
SONYKV2654R
Burning r608, replaced d604R608 gets very hot and opens up in few hours. found d604leaky, had to unsolder the diode to find it was defective.