| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KV27EXR15 | NO PICTURE/NO DISPLAY, REPLACE CRT | No picture and no display. Y/S inputs to IC-301 (pins 3 and 5ok). No RGB outputs. IC-301 pin 7 at 0.2vdc confirming IC-301 has pic-ture muted. G-2 voltage ok. IC-301 pins 19, 21, 23 all at 3.8vdc (shouldbe 4.2 - 7vdc), indicating missing cathode sam | ||
| Sony | DTC75ES | NOISE IN AUDIO | Customer complained of noise and glitches in audio. CheckedRF with scope and it was good. TY7252 tracking tape showed good envelope.However, when I changed back to my audio tape one head was missing. | ||
| Sony | DTC1000ES | TROUBLESHOOTING DIGITAL CIRCUITS | Intermittent audio distortion. Found that using a LeaderLB05860 waveform monitor hooked up to the digital output quickly demon-strated that one unit had a problem with its digital circuit and one didnot. Viewed the digital output on rear panel with the | ||
| Sony | DTC75ES | TROUBLESHOOTING DIGITAL CIRCUITS | Intermittent audio distortion. Found that using a LeaderLB05860 waveform monitor hooked up to the digital output quickly demon-strated that one unit had a problem with it's digital circuit and onedid not. Viewed the digital output on rear panel with th | ||
| Sony | DTC700 | TROUBLESHOOTING DIGITAL CIRCUITS | There were two DTC-700s in the shop both had intermittentaudio distortion. Found that using a Leader LB05860 waveform monitorhooked up to the digital output quickly demonstrated that one unit had aproblem with its digital circuit and one did not. Viewe | ||
| Sony | DTC700 | NO SOUND | The unit had no sound. Looked at coaxial digital out withscope. Found it distorted even in Stop mode. Checked IC-307 X-302 andX-303 waveform. Found both crystals producing a distorted waveform.Found X-303 was bad. | ||
| Sony | SLV757UC | INTERMITTENT SHUT DOWN | Found weak drive voltage from pin 11 of IC-001 on MD-22board causing flat spot on drum motor. | ||
| Sony | ITA600 | MAIN PCB HAS WRONG MICRO INSTALLED | Boards coming from Kansas City have wrong micros installed.The correct IC number is TMP47C47N-9613. The IC in the new boards isTMP47C47N-9635. These ICs are not compatible. | ||
| Sony | TAM50 | NO OPERATION OF TAPE TRANSPORT | No operations of tape transport i.e. pinch roller would notengage gear, Reference No. 75, was not engaging due to the washers,Reference No. 72, being gone. | ||
| Sony | SPP150 | UNIT WORKS O.K. IN NORM BUT DEAD IN BATT SAVE MODE. | Unit works fine in NORM mode, however no action in BATT SAVEmode when TALK is pressed. IC201/pins 12 and 29 went correctly from highto low when the mode switch was switched from NORM to BATT SAVE,indicating a good switch. IC201 was replaced to no avail. | ||
| Sony | SLVR5UC | CANNOT SET TIMER FUNCTION | When trying to set timer, after entering all information onremote it doesn't work. When the transmit button on the remote ispressed, the VCR indicates it has not received the information (bymultiple beeps) and the timer is not set. All other remote fun | ||
| Sony | KV1981R | NO MAIN AUDIO - LOW SAP OUTPUT, REPLACE IC-810 | Unit came in with multiple problems (lightning damage) inclu-ding no audio, IC-810 was changed, still no main audio, some SAP. InputMPX (pin 1, IC-810) was present. Pin 14 showed 0V (SAP mute) pin 29 (L &R out) had output but no signal on the other sid | ||
| Sony | CDX6020 | NO PRESET MEMORY FOR RADIO STATIONS | Unit would not preset audio station memories. Stations andbuttons functioned normally but when memory 1-6 was attempted unit wouldnot hold and would revert back to prior selection. | ||
| Sony | HSTV102 | DECK B RECORDS FROM DECK A BUT NOT OTHER SOURCES | Tape deck B would only record from deck A not from othersources such as tuner or CD. Found voltage at pin 13 of IC-502 was high(+6 volts) regardless of deck A being in Stop or Play mode. Unsolderedpin 13 from the pad and still had high voltage on the p | ||
| Sony | SLV70HF | MISSING GROUND IN SWITCH BLOCK SCHEMATIC | The schematic of the switch block (page 158) does not show theground reference connection for most of the buttons. Only the odd anderase buttons are shown to have a ground. |