Dicas Reparação
Modelo - Chassis ITA3000
Pesquisa: ITA3000 Enviar Dica Resolvida
Resultados 15
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | ITA3000 | NO RECORD OAM AND DEFECTIVE OGM REMOTE - RESOLDER IC801 | Would not record OGM and no OGM remote. I checked signalat IC801/pin 69, DA out, after recording OGM announcement. No signalcame out. Signal is coming in at IC801/pin 75, MIC1. IC801 chip had alot of pins cold soldered. | ||
| Sony | ITA3000 | DEFECTIVE RAM TEST - REPLACE JOG SHUTTLE SWITCH (REF 29) | After Ram test, press play and stop button, no function.Switch at shuttle block was defective. | ||
| Sony | ITA3000 | NO BATTERY BACKUP - RESOLDER TP50 AND TP51 | Battery voltage is not reaching to the main board. I checkedbattery contacts TP51 and TP50. There was not enough solder on them. | ||
| Sony | ITA3000 | DEFECTIVE RINGER SELECT - INSTALL R735 | In answering mode or OGM activation, select switch at 3 ringsis defective. It takes 5 rings to activate OGM at 3 ringer select mode.I found that R735 is missing on the board. | ||
| Sony | ITA3000 | DEFECTIVE PLAYBACK OF OGM AND ICM - RESOLDER IC805 | OGM and ICM are cutoff after a few seconds of playback, but intest mode unit will pass RAM test. During visual inspection of board,found IC805 to be poorly soldered. Should RAM test have detected thisproblem? | ||
| Sony | ITA3000 | LOW SPEAKERPHONE VOLUME - RESOLDER C504 AND C522 | Very low audo when using speakerphone. When tracing audiosignal to IC501, I found both caps C504 and C522 torn off their traces.Resoldering these caps fixed problem. | ||
| Sony | ITA3000 | NO SPEAKERPHONE - C512 SHORTED | No audio is heard when using speakerphone. Checked voltageson IC501 and they measured 4.2v. Found leads on C512 to be touchingtogether, grounding out RV501 speaker volume. | ||
| Sony | ITA3000 | DEFECTIVE BELL DETECT - REPLACE PH201, P/N 8-719-156-79 | No OGM activation, constant high at PH201 pin 3 (output).PH201 coupler is defective. | ||
| Sony | ITA3000 | NO OGM ACTIVATION - C208 MISSING | Defective bell detect test. I traced the signal comingout PH201/pin 3, wave form has a lot of ripple at IC701 pin 14 input. Ifound out C208 missing at the main board. | ||
| Sony | ITA3000 | DEFECTIVE ANSWER ON/OFF INDICATOR - REPLACE D702 | No illumination at answer on mode indicator. I checked D702and it is cold soldered at diode side. | ||
| Sony | ITA3000 | DEFECTIVE BELL DETECT - BROKEN TRACE AT TP9 | No OGM activation. No signal going into IC701 pin 14. Tracedit down to PH201 output pin 3. It's missing between R208 to IC701 pin 14. I found a broken trace TP9 to R208 resistor. | ||
| Sony | ITA3000 | DEFECTIVE BELL DETECT - REPLACE Q301, P/N 8-729-927-24 | No ring and its connect or seized a line. I checked Q301collector and emitter shorted together. | ||
| Sony | ITA3000 | DEFECTIVE KEYPAD - RESOLDER CONNECTOR CN101 | Keypad will not register #, 0 or * out to the phone line.Found an open between CN101/pin 29 and CN102. Resoldering CN101 fixesthis problem. | ||
| Sony | ITA3000 | DEFECTIVE RECC/PLAYBACK, REMOTE AND RAM TEST- CHANGE IC802 | Fail at RAM test. Cuts off record playback at remote in ICM.I found IC802 and IC805 chips not reseated properly to the solder padand some pins are cold soldered. | ||
| Sony | ITA3000 | MISLABELED IC IN BLOCK DIAGRAM - IC306 SHOULD BE IC806. | In the block diagram on page 35 of the service manual forITA-2500/A3000 (9-957-952-11) IC306, should be IC806. -HQ COMMENTS: Thanks for the info. It will help other techs. |