Dicas Reparação
Modelo - Chassis
Pesquisa: Enviar Dica Resolvida
Resultados 81403
Pedir dica reparação
| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | ITA4000 | CN901 AND CN902 - PART NUMBERS MISSING | No part numbers for CN901 and CN902. -HQ COMMENTS: These connectors are not supplied as Repair Parts. Theyare only available as part of Main Board assy p/n A-3015-458-A. | ||
| 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 | ITA2500 | VOX DTMF TEST - REPLACE IC504, P/N 8-759-996-43 | No telephone line signal detection on DTMF display. There wasa signal coming in IC302/pin 11 to IC504/pin 2(input). There was no signalon IC504/pin 1 (output). IC504 was defective. |