Dicas Reparação




Modelo - Chassis


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MarcaModelo
(Chassis)
SintomaCausaSoluçãoPor:
SonyITA850
UNIT CONTINUOUSLY SIEZES AND THEN RESIEZES THE LINE Q-101 was not fully saturated, causing the line to be seizedand released continuously.
SonyITA750
UNIT CONTINUOUSLY SIEZES AND THEN RESIEZES THE LINE Q-101 was not fully saturated, causing the line to be seizedand released continuously. Also pertains to serial number 54571.
SonyITA850
DIAL TONE OUT OF HANDSET AND SPEAKERPHONE WAS LOW Q-105 was leaking E to C dropping the voltage on Q-101 andZD-106 in half, from 4.6V to 2.3V.
SonyITA750
DIAL TONE OUT OF HANDSET AND SPEAKER PHONE WAS LOW Q-105 was leaking E to C dropping the voltage on Q-101 andZD-106 in half, from 4.6V to 2.3V.
SonyCFD750
NO SOUND ON CD No sound from CD. Disc spinning and display counting. IC-704has LH5116NA-10 instead of CXK5816M-12L as listed in service manual.
SonyD25
INTERMITTENT OPERATION W/ DC-IN & BP100, INTERNAL BATTERY OK Unit would not work intermittently. Moving DC input cablecaused power to cut in and out. While upside down, unit runs reliably.When sitting flat on bench, power would cut on and off. Moving FOP sub-chassis slightly would also cause power to cut out.
SonyKV27XBR60
HOR. OUTPUT TRANSISTOR REPEATEDLY FAILS, REPLACED C-525 The horizontal output transistor would short every five to sixdays. We found the problem to be caused by a defective coupling capacitor(C-525) in the base circuit of the horizontal driver. C-525 wouldintermittently change value which caused the output
SonyGEN-CAM
SERVICE TOOL When replacing No. 6 tape guide, it is very difficult toloosen the screw that holds this guide in place. By taking the screw-driver bit No. 7-700-752-01 heating it and bending it at a 90 degree angleit is very easy to get to this screw. We did this at
SonyCCDF56
NO REMOTE OPERATION Confirmed output of remote, although no remote functions.Isolated to poor contact at pin 17 CN-502.
SonyDTC75ES
INTERMITTANT STOP/TAPE JAM Intermittantly the unit will stop, lock-up, eat the tape. Theproblem was seen more in the beginning of the tape.
SonyDTC75ES
TRACKING ELAPSED TIME ON DAT HEAD DRUMS U.S. machines store head drum elapsed running time. I nowrecord these times on all DAT workorders. Not only does this show howintensely some customers have used their consumer machines (especiallyradio stations and recording studios) but when you repai
SonyKV2775R
NO TUNER CONTROL, REPLACE R-1576 ON "D" BOARD The tuner was locked up on channel 2 and it was not possibleto change volume or picture settings. The 5V line supplying the tuner andD/A was 3.5V. This line is developed via regulators Q-503 and Q-501. Thesource is the flyback at pin 7. We found the
SonySTRAV920
SURROUND SOUND SHUTS DOWN ON LEFT CHANNEL The left channel of the surround sound amplifier would quitafter about 10 minutes of operation. The output IC (IC-731) was runningvery hot. We found the problem to be caused by an open decoupling capaci-tor C-739.
SonyKPR46CX25
DEAD, Q601 AND Q602 SHORTED, SEE SERVICE BULLETIN 95R1 The power supply converters (Q-601, Q-602) were shorted. Thereplacements immediately shorted and R-632 (surge resistor) opened whenpower was applied.
SonyCCDV11
CORRECT P/N FOR IC-401


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