Dicas Reparação SONY
Modelo - Chassis
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | SLHF900 | TAPE DAMAGE FROM CAPSTAN OVERRUN | Unit would intermittently eat tapes after on index search ofCUE/REVIEW. Capstan motor would overrun and spill tape. Observed amomentary low on Pin 3 of IC505 (PWM Gen) on SS-53 board would causecapstan motor to overspeed. This would continue even if t | ||
| Sony | SLHF450 | ADJUSTMENT METHOD IS INCORRECT | Adjustment method in manual is incorrect, regarding forwardtorque, P176, Section 3-14. The correct version may be found in theSL-HFT7 manual. SL-HF450 manual lists wrong connector and pin numbers. -HQ COMMENTS: We will issue a supplement on this matte | ||
| Sony | BMC220 | BLACK LINES IN PICTURE | Two diagonal lines black in picture during playback of self-recorded tapes. Unit connected to monitor via BMC-J88U jig for testing. | ||
| Sony | RMU880 | TV VOLUME CANNOT BE CONTROLLED WITH RM-U880 | TV volume cannot be controlled with RM-U880 unicommander.Even with System Selector set to TV it outputs command for Audio SystemVOLUME UP/DN. Customers are complaining about this shortcoming. Address-ing this is merely a matter of changing code bits wh | ||
| Sony | CDP70 | UNIT SCRATCHES COMPACT DISC WHILE PLAYING | One of three supporting pins does not go down intermittently,when disc is in for play. Also rubbing the disc gently while playing, itdoes not affect any playing disc. Ten customers with new discs have roundscratches in the middle of circumference. Eve | ||
| Sony | TAAX44 | NO DISPLAY OR OUTPUT | No display or output. All power supply voltages appearnormal. | ||
| Sony | CFD5 | INTERMITTENT NO REVERSE PLAY | This unit would intermittently attempt to go into reverseplay when reverse play button was pushed, but would then go into forwardplay. This would happen about every 4 attempts at reverse play. Found#360 missing. | ||
| Sony | KV2602 | POSSIBLE MODIFICATION OF EXISTING CIRCUITRY | Picture brightness varies with program content/material(random intermittently). Maybe weak sync tips/levels (only on cablechannel 25 scrambled cable channel), request permission to modifycircuitry only if advised by engineering. Also magenta bar on the | ||
| Sony | SLHFR30 | NOISE BAR IN LOW BAND | Unit had buzz in sound and a horizontal bar floating throughpicture. Traced problem to -20 volt line, very high ripple. Thisvoltage is used in the band select. Only channels 2-6 were affected,high band okay. | ||
| Sony | CDP55 | CENTERING CAP BREAKING | The centering cap and compression spring in the middle of discturntable fall out of place. The symptom is either the disc tray will notmove or the disc will not spin. The problem is the plastic legs that aresupposed to provide spring tension to hold th | ||
| Sony | CDP35 | DISTORTED AUDIO | Unit played but with sparse static in audio. Initiallysuspected switching IC (IC302) but scope showed spikes all the way back toIC701 (CLV). All CLV and processing working OK, so last suspect IC wasRAM. | ||
| Sony | SLHFR30 | REEL DRIVE FLYWHEEL BEARING | Servicer experienced several SL-HFR30 all sold by'same dealer, with reel drive torque problems. Flywheel was not turningfreely in bearing. | ||
| Sony | PCM501 | SHUTDOWN | Thermistor installed instead of 2.2 ohm resistor, causesshutdown and various problems. | ||
| Sony | KPR4110 | WHISTLE IN SOUND, UHF CHANNELS ONLY, REPLACED PLL CIRCUIT | Whistle in sound, UHF channels only. This was accompanied bya mild venetian blind effect in the picture. | ||
| Sony | XR27R | AUDIO DISTORTION IN RIGHT CHANNEL | Static thru R. ch. Best heard when playing a blank tape. |