Dicas Reparação SONY
Modelo - Chassis
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Resultados 18945
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KV2647R | SHUT DOWN, HVR CRACKED | These units would go into HV shutdown intermittently. Thereason is that the HVR block had a hair-line crack. The voltage out ofthe HVR block feeding Q505 would increase up to 30VDC at times activatingprotection circuit. | ||
| Sony | KV2645R | DEAD, REPLACED FBT | FBT (2) transformers were replaced the same week on twodifferent units for excessive vibrations or singing. Wedging did nothelp. | ||
| Sony | KV1920D | BLANKING BAR AT THE TOP OF THE SCREEN | A blanking bar at the top of the screen approx. 2 inches high.It did not vary with line voltage. Tech. had had some initial verticalproblems. Found only 33V on collector of Q502. Obviously 135V was noton D506. | ||
| Sony | KV1915 | POOR CONVERGENCE | Cannot adjust B & W tracking, the convergence changes, andthe only way that the set will come close to being in focus is if thecontrol is all the way to one end of its range. | ||
| Sony | KV1747R | NO CENTERING OPERATION | This unit had the picture centered too far left even afteradjusting the centering tap. Shorting L504 in series with the tapprovided enough range. | ||
| Sony | KP7220 | FAINT CROSS HATCH ON THE SCREEN, REPLACED D303 | This unit had a faint cross hatch superimposed on picture. | ||
| Sony | KP5040 | NO RED VERTICAL CONVERGENCE, REPLACED CRT NECK ASS'Y | The red vertical convergence does not move. Found open coilon the CRT neck assembly. | ||
| Sony | VTX1000R | HISS NOISE IN AUDIO | Slight hissing noise in audio only on channel 13. | ||
| Sony | KX2501 | SHUT DOWN AFTER WARM UP, Q1520 | Unit would go into shut down after warm up. The shut down wastraced to the hold down circuit, where the horizontal osc. output wasdefeated. Inspection revealed a voltage being developed at collector ofQ1520. All other voltages and devices checked OK. | ||
| Sony | KX2501 | DOTS IN PICTURE, REPLACED CRT | With no input signal, even with the brightness and picturecontrols completely off the CRT exhibits about 12 white dots distributedin a random pattern over the entire face of the CRT. These dots willrandomly burst in a sort of fireworks pattern, dispersi | ||
| Sony | KX2501 | UNABLE TO CONTROL CONTRAST, REPLACED C1568 | Unable to control contrast. Using pix control found ABL #3transistor reading 3.8VDC, should be 25.2VDC, isolated problem to C1568.Capacitor was read 200 ohms. | ||
| Sony | KX2501 | NO PICTURE, REPLACED R761B | Lose video immediately after turn on. Traced video info. upto the base of Q704 and no further on C board. Voltage on collector ofQ713 was about 7V DC and it would not allow Q707 to conduct. ReplacingQ713 would allow video to be present about 20 second | ||
| Sony | KV4100 | PARTS AVAILABILITY | Referring to Page 74 of the S/M, servicer claims that mountedon the capstan shaft above the flywheel there is a plastic gear which isnot shown in the S/M. My manual does not show such a gear either. -HQ COMMENTS: The plastic gear in question is a part | ||
| Sony | KV2648R | DEAD, REPLACE R616 AND Q603 | Set would operate for approx. one to two min. It would thenblow the converter out in power supply and the line fuse. Found R616open and Q603 leaky from collector to emitter. | ||
| Sony | KV2648R | PICTURE DISTORTION, RESOLDERED 135V RECTIFIER | Picture would expand and contract with the setting of thepicture control. There was also video noise in the picture and a highpitched faint arcing sound. |