| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | STRAV970X | NO DISPLAY - REPLACED OPEN D101 | No display, AC across pins 1 and 69 ok. The 33v line todisplay and IC101 also ok. Found D101 at 3.6v Zener that goes to thecenter of T902 open. | ||
| Sony | SDP777ES | NO LEFT OR REAR CHANNEL OUTPUT IN ALL MODES - REPL IC457 | Traced problem back to IC457 pin 4 which had only noisesignal. IC457 pin 15 checked ok. | ||
| Sony | MHCC33 | AUDIO PROBLEM IN CD MODE - REPLACED IC107 | Distorted audio in CD mode. | ||
| Sony | LBTG1000 | NO OPEN CD - CABLE REF. #4 SHORTED TO GND. | Unit's CD door will not open. Found cable #4 to be shortingto the chassis ground. The cable rubs on the bottom and wears theinsulations causing the short. | ||
| Sony | HCDC50U | HUM IN AUDIO - TIGHTENED GND SCREWS | Hum in audio. | ||
| Sony | HCD541 | UNIT DEAD - REPLACED C843 | Unit dead, + unreg. voltage is being supplied by SAW542.Reset voltage at Pin #4 or IC714 located on main PCB is low. In this caseit was measured at 2 volts. | ||
| Sony | HCD241 | NO POWER UP - RESET IC401 PIN 17 TO CHASSIS GND | Unit would not turn on. Five volt and 12 volt lines present.Microprocessor has all must haves. Jumped RY901 and unit functions withno display or audio. | ||
| Sony | DTC57ES | TAPE PATH ALIGNMNT - REMOVED SPACER UNDR CAPSTAN MOTOR SCREW | Cannot adj new type guide (unit always wrinkles tape.) | ||
| Sony | CDPC345 | CLICKING & KNOCKING WHEN CHANGING CD'S - REPL BRACKET ASSY | As the cam gear turns and brings the bu bracket up a knock isheard. This knock causes the CD not to be chucked properly it will loadthe CD off center and jam up. The knock or clicking also causes the buholder to bounce into position. | ||
| Sony | CDPC265 | WILL NOT READ DISC PAST 30 SECONDS - TRACE TO M101 BROKEN | disc player will only play for 30 seconds then unit won'tread disc anymore. | ||
| Sony | CDPC245 | HUMMING NOISE FROM MACHINE - ADD WEIGHT(S) TO BU ASSY | As per SBHFP0381, stated to add weight and screw to optic toeliminate noise. Works for some but not all. Noise originated fromspindle motor assy X49175233. Hot glued to 2 weights 496297901 toleft hand rear side of BU assy I cannot determine if this is | ||
| Sony | BM146 | R.F.I. CAUSES RECORD INHIBIT CKT TO ACTIVATE, INSTALL SHIELD | R.F.I. was being picked up by the Record Inhibit head causingthe machine to drop out of RECORD mode. The source of interference couldnot be removed. | ||
| Sony | XRU500 | NO AM OR FM (REPLACED IC601, IC502, AND D602) | No 8V to tuner (IC601 bad and IC502 bad). IC601 had novoltage out of pin 5 (replaced IC601 then voltage out of pin 5). IC502had no voltage out of pin 52 & 37 (replaced IC502 then voltage out of pins52 &37 was ok). Still no voltage to tuner, found D602 | ||
| Sony | XRC410 | GEAR STRIPS, WON'T EJECT TAPE | A gear on the reel assembly strips, the specific gear does nothave a reference # other than 128 (Bracket assy, reel). The stripped gearprevents the mechanism from releasing the tape. | ||
| Sony | XRC410 | NO POWER OR DISPLAY (R566 WAS OPEN) | Unit had no front panel display, no LED's were on. Tape wouldload, then eject. Determined that ACC check voltage at pin 46 of IC510was missing. Following voltage back to D554, dual diode, it was stillmissing at the anode. Located R566, had B+ on one |