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Modelo - Chassis


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(Chassis)
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SonySTJX235
NO STEREO Unit arrived with complaint of dead stereo light and nostereo. Replacement of IC-401, MPX chip was in vain. We noted that theVCO was inoperative. Tracing back to the IF chip we discovered that thetuned pin (8) was not toggling. We found a significant
SonyCDX5080
PART NUMBER ADDITION - WALKMAN INPUT DUST COVER The service manual does not list the part number for theWalkman input jack dust cover.
SonyCDX5040
PART NUMBER ADDITION - WALKMAN INPUT DUST COVER The service manual does not list the part number for theWalkman input jack dust cover.
SonySLHF900
NO DRUM AND CAPSTAN ROTATION Machine will load tape and thread. Hit Play and drum won'trun. Capstan won't run. Reel motor running.
SonySLV676UC
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.
SonyKV2648R
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.
SonyKV19TR20
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
SonyTCRX80ES
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
SonySLV585HF
UNIT CUTS OFF AND ON Unit cuts off and on. During Play mode. Power (front panel)light stays on all the time.
SonyCDX7520
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
SonySPP120
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).
SonyTAM30
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
SonyITA305
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
SonyTAM30
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-
SonyTAM30
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


Assistência TécnicaAs dicas apresentadas destinam-se a técnicos de eletrónica, a tentativa de reparação ou assistência sem ter conhecimentos de eletricidade e eletrónica, podem provocar danos mais graves aos equipamentos e, devido a tensões muito elevadas em alguns circuitos, graves danos fisicos que podem constituir um risco em determinadas reparações.

Não arrisque reparar equipamentos com tensões elevadas se não tiver conhecimentos técnicos para o fazer em segurança.

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