| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | SRFM40W | WEAK FM | Weak FM - no FM. | ||
| Sony | STRAV460 | 60HZ HUM ON FM ONLY | 60Hz hum on FM only. Q-804 was shorted. In addition, D-811which is a zener on the base of Q-804 was shorted on this unit. | ||
| Sony | STRAV760 | 60HZ HUM ON FM ONLY | 60Hz hum on FM only. Q-810 was shorted the B+ line to FM. Itread 80 volts rather than the 2.7V indicated in the service manual. Itwas putting about 1V AC on this line which was causing the hum. | ||
| Sony | WMAF55 | PART NUMBER MISSING - BAND SWITCH KNOB | There is no reference in the exploded view for the bandswitch knob. It is not even shown in the exploded view. I need a partnumber for this knob. -HQ COMMENTS: From Tokyo (fax A891381): P/N is 3-346-595-02 which isthe same as the WM-AF42. | ||
| Sony | ICFPRO80 | NO SINGLE SIDE-BAND OPERATION | No single side-band operation. No OSC from X1. C-79 open. | ||
| Sony | CCDF50 | PARTIALLY EJECTS AND DAMAGES TAPE | Intermittent shutdown - would eject part way then reloadeating tape. | ||
| Sony | CCDF70 | NO ZOOM MOTOR DRIVE | No zoom motor drive. | ||
| Sony | STRAV700 | AFTER A FEW MINUTES THE +/- 15V LINES DROP TO 0V | The +/- 15V lines drop to 0V after a few minutes. | ||
| Sony | D4 | INTERMITTENT NO POWER | Unit does not turn on - but turns on when upper lid is pusheddown. The open leaf switch (S-801) does not contact well because the openleaf switch is bent or the pushing lever in the upper lid is worn out. | ||
| Sony | D15 | NO SPIN/SCRAPING NOISE DURING PLAY | The height of the turntable is too low. It should be 1.5mm or2mm from MD chassis. A disc does not spin because there is no gap betweenthe turntable and MD chassis or the gap between them is just too small. Adisc touches the MD chassis intermittently. | ||
| Sony | MDP200 | RADIO FREQUENCY INTERFERENCE | Unit had herringbone type interference caused by A.M. radiostation 850 K.C. WHDH Needham, Massachusetts (approximately 1 1/2 milesaway). Problem showed up in both video and R.F. out. The interference isA.C. line related. | ||
| Sony | GEN-CAM | 8MM LAPPING TAPE | What is the part number for the 8mm lapping tape? -HQ COMMENTS: The part number for the 8mm lapping tape is 8-883-103-10. | ||
| Sony | WMF100II | TAPE WILL NOT PLAY OR EXCESSIVE WOW AND FLUTTER | Pinch roller touches part of cassette shell causing excessivewow and flutter or no play. | ||
| Sony | STRAV900 | PART NUMBER NEEDED - INSULATING MICA | Is there a part number for the insulating mica for the outputtransistors (2SC3856 and 2SA1492)? -HQ COMMENTS: The mica insulators are shown on page 29 of the servicemanual as reference number 57. Part number is also listed it is4-885-901-31. | ||
| Sony | EVS700U | LP MODE PLAYBACK PICTURE IS DISTORTED WITH SELF-RECORDING | SP mode is ok. When I recorded and played it back in LP mode,one channel of RI waveform level is too small. |