| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | PS333 | DEFECTIVE PITCH CONTROL | Neither 33 or 45 rpm would lock in. Speed was excessive.Voltage were correct. | ||
| Sony | PCMF1 | DEFECTIVE D102 | Left channel was noisy - REC level control had minimal effecton noise - input signal was weak and distorted - line amp had some DCoffset at input to LPF - found constant current diode D102 breaking down.When testing this diode on a curve tracer using a 1 | ||
| Sony | ICF9540W | DEFECTIVE Q1 | This unit had poor sensitivity and distorted output in theFM mode. We found the RF amp to be defective. | ||
| Sony | CFM200 | MISSING PART NUMBER | The P/N for the mechanism chassis is missing from the servicemanual. However, the chassis from the CFS-400 appears to be very similar,this chassis is P/N A-3102-043-A. Are these two chassis the same?The part for the CFM-200 was researched by KC with ne | ||
| Sony | CDP101 | UNIT OUT OF ADJUSTMENT | Unit would skip on 2nd track and 5th track. | ||
| Sony | CDP101 | WOULD NOT READ TOC | Would not read TOC. I could hear something rattling insideunit when I took it out of the box. I found one screw inside that shouldhave been in the sled motor bracket. After correcting this, it still didnot read disc. Output of IC403 (eye pattern) was | ||
| Sony | CDP101 | STUCK OBJECTIVE LENS/COIL ASSEMBLY | The disc would eject before the TOC could be read. FocusDC drive out of IC204 (TP 10) was correct, but the objective lens in theTOP was not moving. | ||
| Sony | XR77 | DEFECTIVE RY301 | The left channel would intermittently cut out on AM/FMfunctions during first 5-10 minutes. This at first appeared to be causedby a defective semiconductor. Further examination revealed relay 301 tobe the cause. Heating and cooling the relay confirmed | ||
| Sony | XR77 | DEFECTIVE Q105 | The left channel fluctuated between distorted low output andno output. We found Q105 (muting transistor) leaky. | ||
| Sony | XR70 | ERROR IN MANUAL | Terminal marking for Q303 as shown on PC board incorrect(Emitter and base leads reversed.) The picture on Page 6 of the servicemanual (Supplement #1) is correct but it does not match the silk screenon the PC board. | ||
| Sony | WMD6 | PINCH ROLLER SUPPORT NEEDED BENDING | C-90 tape (TDK) would not run properly through capstan andpinch roller. Problem existed only on TDK 90 minute tapes. Hi Freq.would drop out-left channel would decrease in volume. Tape wrinkleevident at capstan. Pinch roller and capstan replacement do | ||
| Sony | TCK777 | POOR CHASSIS GROUND CONNECTION | Low level hum in output. | ||
| Sony | TCK55 | DEFECTIVE RELAY | Right channel meter erratically PEGS accompanied by loud hum. | ||
| Sony | TCK44 | Q310 SHORTED | This unit had a squeal in the left channel, about 5 kHz, itfirst appeared to be a ground problem but closer examination revealedG106/Q206 muting transistors to be partially turned on. | ||
| Sony | TCFX500R | BENT TAB ON HEAD CHASSIS | Head deck would cycle up and down about 3 times after FWDbutton was pushed, then there would be a graunchy noise and deck would gointo FF. |