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Sony Repair Tips




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Search: sony
Results: 20100
Make Model Symptom Problem Solution By
SONY ITD10
Low dial tone on the speakerphone - reflow c-347 The unit had a low dial tone on the speakerphone. i foundc347 was cold soldered.
SONY SPP57
No ring nor page - replace sw-501, p/n 1-571-377-11 The unit would not ring or page. i found sw501 was always inan off position no matter what position the switch was in.
SONY SPP57
No line led - replace d-9, p/n 8-719-029-97 The unit would grab a line, but line led would not light. d9(line led) had proper voltage to light. eventually, i found d9 was open.
SONY SPPA20
Handset did not receive - replace ft502, p/n 1-239-459-11 The handset did not receive. i found ft502 was open.
SONY SPP75
No talk- error beeps - replace q-551, p/n 8-729-821-27 When the talk button was pressed on the handset, the unitwould not scan through the channel led's but led 1 and 2 would blink alongwith five error beeps. the handset was not transmitting during the test.i found q551 open which is the tx switch to supply
SONY SPP95
No talk- error beeps - replace q-551, p/n 8-729-821-27 When the talk button is pressed on the handset, the unit wouldnot scan through the channel led's but led 1 and 2 would blink along withfive error beeps. the handset was not transmitting while in test. ifound q551 to be open which is the tx switch to su
SONY ITD200
No tone dial - reflow c-334 The unit would not tone dial. i found c334 open (coldsoldered).
SONY CDPC315
Intermittent open and no open disk skip (resolder m701) The unit intermittently opened, and there was no disk skip.upon diagnosis of unit, i found a cold solder joint on the negativeterminal of the table motor m701.
SONY STRAV770X
No audio output - f852 & f851 faulty, cnb731 shorted Fuses f852 and 851 would blow when the speaker selector switchwas turned to the off position. i found +20 volts on the surround relaylines of cnb731 on the surround amp board. upon further inspection, ifound b+ and surround relay line of cnp732 shorted
SONY SPP85
No talk/error beeps - replace q-551, p/n 8-729-821-27 When the talk button was pressed on the handset, the unitwould not scan through the channed led's but led 1 and 2 would blink alongwith five error beeps. the handset was not transmitting while in test. ifound q551 to be open, which is the tx switch to
SONY SPP75
Rings, but will not connect-replace ry-301, p/n 1-515-773-11 I found the unit was able to ring, but it would not grab aline. q302 was turning on, but the line relay ry-301 would not kick.
SONY SPP95
No handset transmit - replace d-551, p/n 8-719-949-46 The handset would not transmit. i checked ic651 (pll) and itwas operating properly. next, i checked pin 1 of ic551 and found nofrequency. also, d551 was open.
SONY SPP85
No handset transmit - replace d-551, p/n 8-719-949-46 The handset would not transmit. i checked ic651 (pll) and itwas operating properly. i checked pin 1 of ic551 and found no frequency.in addition, d551 was open.
SONY SPP75
No power led - reflow r-260 No power led. unit worked fine, but the power led did notlight. i found r260 cold soldered.
SONY SPP85
No power led - reflow r-260 There was no power led, the unit worked fine but the power leddid not light. i found r260 cold soldered.
SONY SPP95
No power led - reflow r-260 No power led, the unit worked fine, but the power led did notlight. i found r260 cold solered.
SONY SPPA60
Unit repeatedly seized and released line - replace c-46. The unit would repeatedly seize and release the line. i foundc46 was leaking.
SONY SPP95
No handset transmit - l553 popped through board Handset was not putting out any transmit signal. l553 waspopped through the board and did not allow for oscillation.
SONY SPP85
No handset transmit - l-553 popped through board The handset was not putting out any transmit signal. as itturns out, l553 was popped through the board wich did not allow foroscillation.
SONY SPPA20
Handset transmit frequency is low - replace x501 (157976811) X501 is defective because it prevents ic501 (pll) fromoperating properly. x501 is producing a low amplitude which is notsufficient to correctly run ic501 (pll). in addition, it prevents the txfrequency from being adjusted to the correct frequency.