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Modelo - Chassis
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | TA2650 | REPLACEMENT TRANSISTORS ARE IMPROVED | Customer complained of noise with volume control at midposition, standard input levels. | ||
| Sony | TA2650 | SWITCH OUT OF PROPER LOCATION | No audio output on any function - function switch (S1) wafers180 degrees out. | ||
| Sony | STRV55 | LEAD DRESSING NEEDED | Whining noise from processor with no FM signal and muting off. | ||
| Sony | STRV55 | WIRE NUMBERS ARE REVERSED | Incorrect wire number. Numbers #1 and #3 reversed. | ||
| Sony | STRV35 | DEFECTIVE OUTPUTS | The NPN output transistor opened on one channel of each ofthese receivers. No other problems found. | ||
| Sony | STRV2 | P/N FOR GLASS | Cases of concealed damage to front glass on these models havebeen reported. Present solution is to replace entire front panel assemblybut it is costly. -HQ COMMENTS: A similar situation developed on the STR-4800SD, -5800SD,-6800SD models 3 years ago. | ||
| Sony | STR7065 | PROTECTION TRANSISTORS REVERSED | Burned main amplifier board was replaced (X-482-232-50).Amplifier clipped at 1 watt out. | ||
| Sony | STR212 | DEFECTIVE IC20, 301, Q301, 302 | No AM or FM - IC201 voltages incorrect, Q301 collector read 11volts. Replacement of individual IC, would knock the other chip out. | ||
| Sony | STC7000 | ADJUSTMENT NEEDED | The maximum deflection on tuner input meter did not correspondto center channel on tuning meter. Adjustment of FM discriminator and FMIF was unsuccessful. | ||
| Sony | SQA2030 | DEFECTIVE Q701 | Noise in back channel outputs. -HQ COMMENTS: Replaced regulator transistor Q701, 2SC1124. | ||
| Sony | PSX70 | WEAK MOTOR | Tone arm would not complete return and play cycle wouldstop widway most times. | ||
| Sony | PSX40 | DEFECTIVE MGH | Turntable speed erratic. Maximum output from MGH was 15-20MVp-p. Even slight readjustment of the head caused it to scrape theplatter. | ||
| Sony | PSX30 | LOOSE LEAD ON C101 | Frequent slowing down of motor. Found one lead of C101loose. | ||
| Sony | PSX30 | DEFECTIVE DETECTION LEVER | Scraping noise. Cause: detection lever had been jammed underprotrusion on bottom of cam gear in shipping and was permanently warped.This was touching the top of the magnet ass'y on the motor shaft. | ||
| Sony | PSX20 | DEFECTIVE IC101 | In play mode turntable operates normally, in stop mode (poweron) turntable rotates backwards. In STOP mode, IC102-2 output goesnegative 2.1V and inverting input remains slightly positive (Pin 6). Theoutput of LOGIC Pin 6 of IC101 remains at +1 volt. G |