Dicas Reparação SONY
Modelo - Chassis
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | SLHF900 | NO DRUM AND CAPSTAN ROTATION | Machine will load tape and thread. Hit Play and drum won'trun. Capstan won't run. Reel motor running. | ||
| Sony | SLV676UC | WON'T COME ON AFTER POWER INTERUPTION | After a brief power interuption (unplug and then plug backin), unit would be inoperative. +5 volts was present but no clock displayor any functions. | ||
| Sony | KV2648R | UNIT IS INOPERATIVE, OPEN R-607 | Q-604 turned on disabling the oscillator on the power supplysection. The base of Q-605 is 2 volts thereby allowing Q-604 to conduct.I found out that R-607 is open. | ||
| Sony | KV19TR20 | INOPERATIVE SET, REPLACE C-563 & R-568 | Inoperative set. No horizontal osc function. IC-301 is inop-erative due to no 9V line. Inspection revealed horizontal output circuitinoperative due to open R-568. Replacing R-568 restored high voltagebut set was in high voltage protect mode. Pulse o | ||
| Sony | TCRX80ES | INCORRECT PART NUMBER IN SERVICE MANUAL (REF.# 908) | The part number for the (US) System Control PCB, Ref. No. 908,listed on page 25 of the TCRX80ES Service Manual is incorrect. Theincorrect part number is A-2056-460-A. -HQ COMMENTS: Use the part number shown on page 30 of the TCRX80ESService Manual, Ref | ||
| Sony | SLV585HF | UNIT CUTS OFF AND ON | Unit cuts off and on. During Play mode. Power (front panel)light stays on all the time. | ||
| Sony | CDX7520 | RECEIVING INCORRECT PART: L401 68UH INDUCTOR | When L-401 is ordered, replacement from Kansas City will notfit. Original part is axial type in shape, while replacement is radialtype and will not fit under cross brace of main board. -HQ COMMENTS: The radial type inductor which you received from NPC | ||
| Sony | SPP120 | NO DIAL TONE - NO SIDE TONE | No dial tone and no side tone but the hand set will transmitto the analyzer. Signal was being stopped by defective C-609 before itcould enter IC-303 pin 8 (telephone line duplexer). | ||
| Sony | TAM30 | UNIT LOCKS UP | When applying power to the unit without a tape in the deck,unit does a quick reset and gives an error detection signal. This was anindication that the micro was trying to perform a mechanical function.Scan pulses were found on IC-3 pin 58 telling the mi | ||
| Sony | ITA305 | LOW HUM IN UNIT | Unit had low hum when trying to break the dial tone and therewas also no OGM. This was the result of the power supply voltage beingpulled down to 8.5 volts. IC-606 was internally leaking to ground. VCCto ground was approximately 2K Ohms. Also credit | ||
| Sony | TAM30 | INTERMITTENT LINE CONNECT | With the line cord plugged in, unit will grab the line in 60seconds (with audible dial tone) and then release the line in 60 seconds.This is a continuous cycle. This is caused by C-1 leaking which activatesPH-1 and grounds pin 4. This in turn holds IC- | ||
| Sony | TAM30 | ACTS LIKE NO POWER AFTER KEY IS PRESSED | With line cord and power cord plugged in, the unit acts likethere is no power while performing OGM function. With line cord removed,OGM function can be performed. The cause was C-1 being leaky, which turn-ed on PH-1 and lowered pin 4 to ground holding | ||
| Sony | ITA205 | INSTANT HANGUP | When unit answered the ring, it would grab the line momentar-ily and release it. IC-401 pin 19 was not supplying the .7 volts to thebase of Q-106, which is necessary to operate the O.G.M. interupt detectcircuit. This in turn would not allow PH-604 to a | ||
| Sony | ITA305 | NO ANSWER | Unit will not answer the ring signal. C-601 is missing fromthe PCB. | ||
| Sony | SPP50 | NO SIDE TONE | No side tone but handset does receive dial tone. The problemwas isolated in the base. Defective C-71 was preventing side tone fromreturning to the handset. The capacitor was dried out which allowed theouter can to spin freely. Also pertains to serial |