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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | TCM5000 | STATIC IN AUDIO | This unit produced an intermittent pop/static in the audio.We found the capstan bearing to blame. I have noticed that this unit isespecially prone to static problems caused by poor grounds. | ||
| Sony | TCV7 | MALFUNCTIONING AMS MODE | This unit would engage when the AMS function was activated butwould not stop at the next selection. We found IC707 to be defective.Pin 10 would not change states. | ||
| Sony | TCK777 | POOR FREQUENCY RESPONSE | Poor high frequency response on recording. | ||
| Sony | TCFX505R | MALFUNCTIONING AMS MODE | No music scan or FWD AMS operation. Found that head chassiswas not staying up in AMS position, thus the RP head was not reading anyaudio off the tape. | ||
| Sony | TAF555ES | TRANSISTOR SUBSTITUTIONS | Power amplifier uses many 2SC1815-Y transistors in the firststages. Parts list subs them with 2SC1364. I believe this is incorrect,since for instance Q309 and Q310 would need a Vceo greater than 60V. Myspec list shows a typical Vceo for a 2SC1364 of 5 | ||
| Sony | STP7J | MALFUNCTIONING MEMORY CHIP | This unit worked fine except it was not possible to enter astation into memory. All inputs to the memory appeared to be correct.Replacing IC601 (CX761) resolved the problem. | ||
| Sony | ICF2001 | MALFUNCTIONING AGC CIRCUIT | In FM mode, if there is a large bass sound, it is verydistorted. But if the RF carrier level is low, the bass sound is notdistorted. | ||
| Sony | CFSF11 | JAMMED DECK | Head gear P/N 3-313-754-01 broke jamming deck. Afterreplacing gear, and replacing ball's back under head table, in RWD orREV mode head table does not come up enough to lock in position. With nodisassembly instructions unit cannot be serviced successful | ||
| Sony | CDP200 | DISTORTION AT OUTPUT | Went through alignment procedure, but found gross distortionin audio output. Noticed that waveform at Pin 1 IC506 and IC507 was blankfor a portion of the charging time. Could not find any voltages or wave-forms around IC505 wrong. | ||
| Sony | CDP200 | JAMMED GEARS ON CHUCKING MOTOR | Thrust play on chucking motor was excessive causing gears tojam. The limit switch (S805) did not close until cam chucking plate 60was at the mechanical end of its travel. This caused the motor tocontinue to run for a short time after mechanical movemen | ||
| Sony | CDP101 | PLL OUT OF SPECIFICATION | Disc motor turned backward at maximum speed as soon asturning on the power switch. There was no 1/4 RFCK at Pin 23 of IC210(CX193). | ||
| Sony | CDP101 | UNIT WOULD NOT RESPOND TO REMOTE CONTROL | Remote control RM101 would not work with this unit. Did nothave another hand unit to try. By repeatedly keying unit and examiningwaveform at base of Q1, we determined that product word code being outputwas wrong. For example 10011 instead of 10001. | ||
| Sony | WA33 | MALFUNCTIONING MOTOR | Motor speed will vary after unit runs about 30 minutes. | ||
| Sony | TCK555 | GROUND SHORT | The left channel looses record amplitude intermittently.The ground shield between the record and playback boards shorts againstRV301, the left channel record level control. | ||
| Sony | TCFX30 | ERROR IN S/M | In the schematic section (Pages 24B, 25 of both manuals)R321 and R322 are mislabelled as R332, R321 respectively. Also a missingconnection line exists in both service manuals. It is located to theleft of the mislabelled resistors. -HQ COMMENTS: The sc |