Dicas Reparação
Modelo - Chassis KX2501
Pesquisa: KX2501 Enviar Dica Resolvida
Resultados 67
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KX2501A | HIGH PITCH SOUND AND SHUTS DOWN, REPLACED IC1501 | After 5 days of playing (6 hours per day) unit would shutdown and high pitch sound would come from GA board. If set was turnedoff for a few minutes (2 min) set would operate OK for a few days. | ||
| Sony | KX2501A | ALL BLUE RASTER, RETRACE LINES, VERY LOW VIDEO LEVEL, Q1302 | CRT 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. | ||
| 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 | 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 | KX2501A | SET DEAD, REPLACED C666 AND D658 (ADD 4700PF ACROSS D658) | Should D658 short R675 opens. No 16V to IC651 allowing powersupply to produce 240V on 140V line. Blowing out C666. | ||
| Sony | KX2501A | NO SYNC, REMOVE COPPER INSERT FROM U1001 | There have been several units brought into the FSC for repairwith the symptom of no sync. The problem has been traced to theprotective insert installed on the U1001 input terminal. This plug shortstogether pins 1 and 18. This turns on Q1329/sync switc | ||
| Sony | KX2501 | INTERMITTENT SHUT DOWN, REPLACE HVR BLOCK | Unit would shut down intermittently. | ||
| Sony | KX2501A | DEAD SET, REPLACED D1514 | The power supply was whistling and there was no picture orsound. We found D1514 in the high voltage regulator to be shorted. Thispresented about 30 ohms to the 140V line. The fuse never opened. | ||
| Sony | KX2501A | PICTURE FADE IN AND OUT, REPLACED Q1320 | When set would get warm, the video information would fade inand out very slowly. By keeping Q320 turned off, the video would notfade. Everytime the video started to fade, the base of Q320 would go lowand it would turn on. Found Q1302 on BD board was l | ||
| Sony | KX2501 | BULLETS IN PICTURE, GROUNDED CRT PIN 10 | The unit had bullets on the screen even with no video input.It appeared to be caused by some kind of corona discharge. Furtherinvestigation revealed Pin 10 on the CRT to have a charge. This pin isnot connected to anything on the CRT board. Grounding t | ||
| Sony | KX2501 | MECHANICAL POPPING NOISE, TIGHTEN CABINET SCREWS | The customer said that the set made loud popping noises evenwhen turned off. The sounds were caused by the cabinet contractingduring temp changes. We found the screws mounting the mask to the maincabinet loose by 2-3 turns each. | ||
| Sony | KX2501 | IMMEDIATE SHUT DOWN, REPLACED R1602 | Unit would go into shut down within 2 minutes of turn on.Found R1602 open. Replaced with another 24 ohm resistor and performedmanual check for shut down circuit. | ||
| Sony | KX2501 | SHUT OFF, REPLACED IC651 | Set shuts off just after turn on. Found 140V B+ line goingup to 250V. | ||
| Sony | KX2501A | VERTICAL BARS IN THE PICTURE, REPLACED C1527 | Light vertical bars in the picture. | ||
| Sony | KX2501A | SHUT DOWN, REPLACED C657 AND Q652 | Transistor Q552 shorts out as soon as the voltage reaches70V on GA board. |