| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KV10FMR20 | NO PICTURE | Y signal not passing through Q-302. Q-304 is on, should beoff. D-301 and D-303 reverse - biased. | ||
| Sony | FD35A | REG/DRIVE, REPLACED IC601 AND Q602 | Unit is dead. We found IC-601 to be dead. In addition,Q-602 had a B-C short. We suspect that Q-602 was the cause of IC-601'sfailure. Replacement resolved the problem. -HQ COMMENTS: In addition to Q-602 replacement, RC protective circuitcan be added | ||
| Sony | SL2406 | INTERMITTENT DRUM SPEED | Intermittent drum speed caused by aged yellow glue on the PGsensor located on the drum stator. After glue has aged, it starts to actas a conductor. | ||
| Sony | STRAV310 | UNIT SHUTS OFF WHEN VOLUME CHANGE WITH REMOTE | Unit would shut off when volume was changed up or down withremote. When remote was released, unit would immediately power back up. | ||
| Sony | KV32XBR10 | VOLTAGE DISCREPANCIES IN SERVICE MANUAL IC-651, CORRECTION 1 | Discrepancies have been found between service manual and theset as follows: On page 1, IC-651 in service manual: 128V, in set: 75V* Service manual shows Q-305, D-309, and - 7V regulator circuit - but itis not actually in set. -HQ COMMENTS: KV-32XBR10, | ||
| Sony | EVS700U | WRINKLES TAPES - TRACKING OFF | Lines in picture look like the tracking may also wrinkle oreat tape. | ||
| Sony | CDXR79 | WILL NOT PLAY OR DISC SKIPS OR STICKS | Unit came in with complaint of after accepting disc, it willnot play or disc skips or sticks after unit plays for a while. Anothersymptom is the MD base will work upside down and all adjustments look ok. | ||
| Sony | CCDV101 | MECHANICAL NOISE WHEN THREADING OR UNTHREADING | Metallic rattling noise during eject or threading modes. | ||
| Sony | CCDF35 | NO CAMERA VIDEO SIGNAL | IC-802 pin 31 had 0 voltage and would not open switchesQ-810 and Q-809 to get CLK, and data to IC-804 (EVR IC). All outputs ofIC were 0 volts. Iris was not opening. | ||
| Sony | SSTL5 | NO OUTPUT | No output from speaker. | ||
| Sony | CFD64 | INTERMITTENT AUDIO IN TAPE MODE | Intermittent audio in tape mode. Too much pressure on FUNCTIONselector switch in tape mode, due to the position of the AUDIO PCB, wascausing intermittent loss of audio, This because switch failed to close. | ||
| Sony | CDP350 | INCORRECT WAVEFORMS AND FREQUENCY | IC-3, CXD1130Q, pins 76 and 80 have incorrect timing for pin80 and incorrect timing and waveshape for pin 76. -HQ COMMENTS: Thanks for the info. The correct waveforms are in the D3service manual, which utilizes the same chip. | ||
| Sony | STRAV900 | NO POWER CONTROL | Unit had previously been worked on for power surge. Three ICs(IC-404, control computer/IC-301, display control/IC-302-GEQ, displaycontrol) had been changed for no turn on. Checking the Must Havesrevealed +5Vdc ok but the osc. signal Stop signals were i | ||
| Sony | STRAV900 | SERVICE MANUAL CORRECTION | Service manual schematic and PCB layout diagrams are quitedifferent from the PCB in this unit (especially in the systems controlarea). | ||
| Sony | CDX6020 | NO OPERATION | Transistor Q-409 shorts, damaging the board. |