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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | WMF10 | MOTOR NOISE | Servicer has had several complaints of motor noise throughhead phones. This problem does not show up on WM-10 but only on WM-F10. -HQ COMMENTS: Electrical motor noise occurs when the B+ line is furthertaxed by: 1) loaded motor 2) decayed battery 3) l | ||
| Sony | WMF1 | OPEN RV-1 | When receiving stereo FM signals the sound was distorted.We found RV-1 to be open - VCO adjust. | ||
| Sony | WM10 | LOOSE SPRING | Small hair spring that sets in plastic groove of auto shutoff part of pinch roller comes out of groove and unit will not start toplay auto shut off taken over. | ||
| Sony | TCK555 | DEFECTIVE IC202 | Unit would go into REC mode, however reel tables would notturn and it would eat tapes. Found that B+ (10V) to board was low.Isolated problem to shorted IC202. | ||
| Sony | TCFX44 | DEFECTIVE RY301 | This unit would play back fine. However when recording therewere intermittent passages with MOTORBOATING. We found RY301 (whichswitches the head between PB and REC) to be defective. This caused a poorground connection on the head. | ||
| Sony | TAAX500 | FRACTURED GROUND LUG | With the volume control set at minimum there is an imbalancein the sound level and static in one or both channels. | ||
| Sony | STRVX550 | MISSING PART NUMBER IN MANUAL | No part number for FM tuner in S/M. FM tuner number isA-434-402-9A. | ||
| Sony | STP75 | DEFECTIVE CONTROL UPC - IC603 | This unit did not light any display segments and there wasno tuning. A check of - control uPC - IC603 revealed that the IC wasinoperative. | ||
| Sony | RS30 | SHORT ON SECONDARY OF T901 | No power. Spring connector was bent towards PC board,shorting to ground the secondary of T-901 (power trans). | ||
| Sony | PSLX500 | AUDIBLE NOISE | Low level thump or rumble like noise is heard when everhorizontal drive motor moves tonearm. | ||
| Sony | PSF5 | INSTRUCTIONS IN MANUAL | Page 17 of service manual, in order to perform verticalbalance and horizontal balance we recommend using a 70mg, a 245mg anda 315mg weight. Servicer has asked if we have a P/N for these weights. -HQ COMMENTS: Use the following number of washers to get | ||
| Sony | PCMF1 | DEFECTIVE IC531 | Sound breaks up (muting) on E to E and on playback ofprerecorded tape. Found VCO drifting. Found no DC change at output ofIC531 Pin 1 although input to Pin 3 was changing. | ||
| Sony | MTL10B | DEFECTIVE Q511 | All functions inoperative. Unit had been worked on by dealerand microprocessor had been changed (IC502). Found that there were nokey scan pulses to Pins 30/31/32 and IC502. | ||
| Sony | M205A | DEFECTIVE PANASONIC CASSETTES | I have had several instances of erratic or non-operation ofM205A at the Pittsburgh FSC counter. In all of these, the customer wasusing Panasonic MC60 cassettes. Replacement with Sony MC60 cassettescured all problems to satisfaction of customer. | ||
| Sony | ICF2001 | DEFECTIVE IC201 | The AM was very weak and only strong stations could BLEEDthrough. We found the problem to be caused by incorrect bandswitching.We found IC201 to be putting out the wrong commands. |