Dicas Reparação

Modelo - Chassis

Pesquisa: Enviar Dica Resolvida
Resultados 78138
Pedir dica reparação
BATTERY PACK AVAILABILITY Have been contacted by two customers regarding replacementbatteries for Eveready type 563. They both stated they contactedEveready Distributors for a replacement and were informed that type 563is no longer available and that there is no substitute. Hav
INCORRECT BRIGHTNESS OPERATION Right side of the screen is brighter than left.
PART MISMOUNT On printed circuit board W, capacitor C524, the marks forpositive and negative connection are incorrectly placed.
DEAD Days to weeks after repair unit blows 2SC1034 chopper andfuse. Original service was chopper transistor and fuse replacement.Servicer did not find cause of this failure.
H STRIPE ON THE SCREEN, REPLACE IC501 This unit had a 1/2 inch wide horizontal stripe across thetube that was slightly darker than the remainder of the CRT. The signalat IC501 was down to about 1Vpp at Pin 9. The dark stripe was causedby the spreading of the raster lines in this area. The
NO HUE CONROL WITH REMOTE, REPLACED IC4002 No hue control in remote operation. Pins 9 and 11 only go1.3V high. Also both go high at the same time.
PICTURE DISTORTION, REPLACED YOKE Raster was distorted at top of picture. Customer complainedproblem most noticeable when any vertical line (or lines) appears onscreen. Straight lines were bent in towards center of CRT. Looked likepincushion correction problem. Any physical movement
AUDIO POP NOISE, REPLACED T207 When changing channels, a pop occurred at the speakers.Sound was normal otherwise. Troubleshooting revealed a signal distortionat IC202 Pin 5 that is synchronized with the muting input at Pin 4.
INCORRECT TUNING OPERATION, REPLACED IC001 Pressing channel up or down button on remote or on the manualfunctions would give no response. Direct access tuning worked.
NO LAST CHANNEL MEMORY, PARTS TOUCHING Unit came into servicer with complaint of intermittent nolast channel memory, volume level and brightness level. Servicer checkedall voltages. They were OK. He replaced IC001 thru IC006 but unit stillhad the problem.
Q510 FAILURE, REPLACED DAMPER D517 Intermittent failure of GCS (Q510). The technician complainedthat all voltages waveforms etc. were in order. Yet this set would veryintermittently blow the horiz. output Q510. Careful examination revealedthe solder land on D517 (damper) to be loose.
DEAD Problem of replacement FBT first reported out of Houston FSCand later from servicers. FBT P/N 8-983-126-15 subs to 1-439-120-00replacement flyback has added resistors for protection and pin #3 isgrounded at terminal. Pin #3 is 18V supply and should not
INCORRECT REMOTE OPERATION,REPLACED IC101 Pressing on/off or picture up buttons on remote transmitterwould not affect receiver.
SHUT DOWN, REPLACED BLUE CRT Immediate shut down at turn on. Could hear arcing from unit.With back removed could see blue CRT arcing.
POOR CONVERGENCE Poor convergence with some controls such as tilt and key stonenear limit of their range.

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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