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Modelo - Chassis
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KV2726R | SET IN SLEEP MODE AT TURN-ON, REPLACE IC-101 CONTROLLER | When set was turned on, it was in the sleep mode per non-authorized servicer. After several checks, found pin 15 of IC-102(memory) to read zero volts. Isolated pin 15 and 5 volts would appear onthe 5 volt line. All other readings were good. With pin | ||
| Sony | FD2A | PICTURE LOOKS OUT OF FOCUS, REPLACED C555 | Picture appears as raster only, out of focus. In reality, thesweep is displaced far above the top of the tube due to DC level upsetcaused by shorted C-555. | ||
| Sony | FD10A | NO HORIZONTAL SYNC, REPLACED C506 | No horizontal sync. OV at pins 17 and 18 of IC-501 causingphase detector inoperation due to shorted C-506 (pin 15, also 0 volts). | ||
| Sony | TAM50 | UNIT DEAD, DOES NOT RESPOND TO ANY BUTTON - ALL LIGHTS OFF | Unit is dead. Does not respond to any button. None of thelights turn on and no beep is heard.The micro IC-3 had all the right voltages, except for IC-3/pin 8 which waslow instead of high. Found that the TIME STAMP IC-10 had no supplyvoltage. | ||
| Sony | CCDTR5 | DEW AND REC (VTR) LIGHT STAYS ON, CAMERA VIDEO FLICKERS | Dew light and VTR REC light stays on and camera videoflickers. DEW and VTR REC light do not affect VTR functions. | ||
| Sony | KV2780R | NO PINCUSHION, REPLACE R-1514 | Unit had no pincushion correction. Collector of Q-1501 had DCbut, no waveshape. There was signal present at pin 3 of IC-1502 and atone side of R-1514. | ||
| Sony | KV27HFR | VERTICAL ROLLING OF PICTURE, REPLACE R-527 | Checked the signal of IC-301 pins 47 and 48 found the synclevel at pin 48 was rounded off. Checked surounding components and foundR-527 had increased in value. I also checked C-520. | ||
| Sony | CFSW303 | WRONG PART NUMBERS IN MANUAL FOR MOTORS | The service manual has the wrong part numbers for the twomotors M-471 and M-481. The correct number for M-471 (deck B motor) hasbeen verified, but not for M-481 (deck A). The error seems to be only inthe later service manual which contains the AEP mode | ||
| Sony | STRAV910 | ERROR IN SCHEMATIC AND PARTS LIST FOR Q-721 | The schematic and the parts list show this transistor as aPNP, 2SA1841. In reality this is a NPN, 2SC-1841 in the set. Please explain is this an error and should a correction be made? -HQ COMMENTS: The service manual has a misprint. If you reference | ||
| Sony | KV27TS22 | INTERMITTENT VIDEO BLANKING, REPLACE REG IC-601 | As the AC line voltage would fluctualte, the video wouldbecome blanked out in an area that would vary in size and shape. The135VDC line never increased over 117VDC. Note: The blanked portions ofthe video would take weird sizes and shapes. | ||
| Sony | KPR4600B | NO LAST CHANNEL MEMORY AT TURN ON, REPLACED Q-308 AND D-339 | No last channel memory at turn on. Also the set wouldintermittently come on with a de-tuned picture or possibly a weirdcombination of numbers in the channel display area. We noted the resetvoltage to pin 7, IC-001 on M board never got over 1.5VDC and a | ||
| Sony | WMAF62 | NO DISPLAY | No display. Tape worked. Radio had static on AM and FM, andVDD was at 0V. | ||
| Sony | WMAF62 | NO FM, STATIC | VCO was ok, AM was ok and stations would scan on display butnot lock in on FM. On known station you will get static. IC-101 allvoltages were ok. IC-001 pins 1, 2 and 4 were low. I had this problemthree times in three months. | ||
| Sony | KV32CX10 | PURITY, APERTURE GRILL CAME OFF, REPLACED CRT | Aperture broken lose. | ||
| Sony | KV27TS25 | POOR PICTURE, CRT | Measured low emission. |