Sony Repair Tips
Search: sony
Results: 20092
Results: 20092
| Make | Model | Symptom | Problem | Solution | By |
|---|---|---|---|---|---|
| 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. | ||
| SONY |
ITA2500
|
Defective ram test - reseat connector cn102 | No response when pressing keyboard dial buttons. i cleanedkeyboard and resoldered ic701. still the same problem. i found cn102connector was cold soldered. | ||
| SONY |
ITA2500
|
Defective bell detect - remove solder splash at mj301 | No ring and no connect, seized a line. q301 checked o.k.i found mj301 jack had a solder splash underneath the connector, pinsshorted together. | ||
| SONY |
ITA2500
|
Defective bell detect - replace q301, p/n 8-729-927-24 | No ring and its connect or seized a line. i checked q301 andemitter shorted. | ||
| SONY |
ITA2500
|
Icm timing failure - replace c539, p/n 1-163-809-11 | Calling in for incoming message, took only 10 seconds max. isuspected problem in the vox detect chip ic506. no signal was going intoic506/pin 1 output, but ouput ic504/pin 1 signal was getting thru, ifound c539 capacitor chip broken. | ||
| SONY |
ITA2500
|
Ogm line distorted - remove solder bridge at ic301 | Distorted audio at on hook and handset dial tone. i hadtraced the problem into ic301, but the ic is working correctly. i hadvisually inspected and found ic301/pin 8 and 7 shorted together. | ||
| SONY |
ITA2500
|
Defective bell detect - replace lf301 | Unit will not ring/connect. checked ring signal and foundlf301 to measure open. fuse f301 checked out ok. |