Dicas Reparação

Modelo - Chassis

Pesquisa: Enviar Dica Resolvida
Resultados 80353
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INTERMITTENT OPERATION Eats tapes, no REW or FF. Unit had been to SSC two times with no problem found. Servicer found IC601 to be intermittent.
VERT JITTER ON SCRAMBLED CHANNELS Problem is intermittent every 10-30 sec. Cust. used ViacomCable Box. Signal strength measured 1000uV for cable and air signals.12dB attenuation stopped jitter but pix was snowy. Waveform check at TP12shows sync pulse distorted.
PERIODIC STATIC POP IN TAPE MODE WHEN WARM Unit would produce a static pop in tape mode through speakersapprox. every 20 sec. Noise was moderately loud and did not vary withvolume control setting. Eliminated problem by grounding shaft of gear(item 273 on pg 27 of S/M) which drained the static c
PART NUMBERS FOR BUTTON ASSY Page 42 of TC-FX7 service manual. There is no part numbersfor cassette door and button assy. Customer has unit that has beenscratched. -HQ COMMENTS: Cassette Lid Ref. #118 P/N A-2315-016-A Button Assy S805-S811 P/N 1-553-609-
TRANSMITTER DOES NOT TURN OFF WITH NO SIGNAL Xmitter does not turn off after audio signal is not detectedin allowed time. Found Q81 defective. Replaced Q81 unit worked OK.After 2 weeks unit came back with same problem. Unit was replaced withnew one. New unit came back with Q81 defective. Unit
UNUSUAL FAILURE OF BRAKE SOLENOID First three units received for service all displayed sameproblem, open solenoid.
RF BLEED THROUGH WHEN IN RGB MODE, READJUSTED RV709 & RV443 Using an IBM PC hooked up to the RGB/digital connector onthe side of the KV-1311CR and having an antenna hooked up to the TV input,with the computer turned on there was RF bleed on the screen. Looked atthe possibility of IC401 on the B board to be the c
NO RECORD DUB/LINE IN RECORD Poor connection between plug and plug wire where wire is pressfitted to connector. This resulted in no record dub or line input record-ing. Found problem by signal tracing to L107 and RY501 not energized.Found Q822 switching but not Q504.
WIRING DIAGRAM OF FRONT END BLOCK IS INCORRECT Wiring diagram of front end block as shown on Page 16 of theS/M is incorrect. Pin numbers are backwards: i.e. #1 is actually #6.Diagram attached to original. -HQ COMMENTS: We will issue a S/B.
B+ AND POWER RY ARE REVERSED ON SCHEMATIC Two lines on the outlet board labeled B+ and Power RY(audio schematic, section G-11) are reversed with respect to each other.+12 volts should be connected to the cathodes of D901, D902 and PowerRY control connects to the anode of D901. -HQ COMMENTS: Thi
SCREEN IS BLUE AND DARK Screen is blue and dark. Has also occurred on CPD-9000.
COARSE PICTURE Coarse looking picture and improper interface.
CAMERA OSCILLATOR FAILURE Camera attempting on run at 50% increase in sweep frequency.
NO PART NUMBER FOR J4 CAPSTAN IDLER ASSY We need part number for J4 capstan idler assy on page 15. -HQ COMMENTS: Part number is X-0027-003-0.
DEAD SET, REPLACED Q1524 The horiz. output device Q1528 would short out shortly afterturn on. If set was operated with 90VAC applied, you could service itwithout immediate failure of Q1528. Waveform inspection revealed distor-tion at collector of Q1528 relating to problem in d

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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