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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | TFM7720W | COLD SOLDER | No AM on low end. | ||
| Sony | TFM6160W | LOOSE PULLEY | The tuning dial does not work. The pulley near the speakerpulls loose causing the dial string not to work. | ||
| Sony | TCS300 | IDLER OUT OF POSITION | Spindle assy take-up reel will not turn in playback or recordonly. | ||
| Sony | TCK81 | BACK TENSION TORQUE ADJUSTMENT | Back tenstion and tape path was incorrect. Complaint of tapewrinkle on maxell tape. | ||
| Sony | ICK81 | STEEL BALL OUT OF PROPER LOCATION | Tape jammed. Found head deck wouldn't retract properly. | ||
| Sony | TCK65 | DEFECTIVE IC802 | After operating approx. 1.5 to 3 hrs, the transport willstop - rewind - stop. The LED display will then indicate 1 and none ofthe function switches have any effect. This is with RMS off, with RMS on- cannot be programmed. Found Pins 12, 13, 15, 16 of | ||
| Sony | TCK5 | MISSING BUSHING | Both of these units came in with excessive wow and flutter.What causes this is the absence of a bushing which holds motor switchlever in place. Without this bushing motor lever is allowed to movefreely and ends up meshing with the teeth on supply gear c | ||
| Sony | STRV55 | LEAKY C412 | AM and FM very slow to lock on station - then drifts offagain. Tantalum capacitor C412 in LPF was leaky. | ||
| Sony | STRV45 | DEFECTIVE C412 | Tuning incorrect - AM station at 920 kHz, tuned in at1600 kHz. No local on 1600 kHz. FM tuning out of band and picking upmicroprocessor RFI. | ||
| Sony | STRV35 | OUTPUTS OPEN UNDER LOAD | The output transistors in these receivers were intermittentlyopening under load. All these were used with 4 ohm speakers.Re: JR0803 STR-V35 listed did not have A979 failure. | ||
| Sony | STRV25 | MODIFICATION FOR RELIABILITY | 2SA979 transistor (Q605/655) fails. -HQ COMMENTS: See upcoming S/B: 100 ohm emitter resistor gets replacedby 150 ohms (also in Technical Newsletter #8110). | ||
| Sony | STRV25 | ERROR ON PCB SILK SCREEN | Q605/655/606/656/607/657/608/658/609/659/610/660/612/613/614/615/616 are all marked wrong on PC board. | ||
| Sony | STJ60 | DEFECTIVE NOR GATE | Normal output levels on pins 1 and 7 of IC302 (audio ampoutput) relay will not turn on - no output. Q404 was 15.5V potentialshould be near 0V when relay activates. Voltages on IC401 pins 8, 9, and10 was all 0V nor gate defective. | ||
| Sony | M203 | DEFECTIVE C122 | Newly made recording had low playback volume. LED indicatedexcellent sensitivity during recording but playback was low. Previouslyrecorded tapes were OK. | ||
| Sony | ICFC11W | DEFECTIVE Q11 | Brightness control does not work. Voltage stays the same on2 leads of the brightness control. Base voltage of Q11 too high. |