Dicas Reparação




Modelo - Chassis


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Resultados 77937
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MarcaModelo
(Chassis)
SintomaCausaSoluçãoPor:
SonyKV1545R
NO TUNING, REPLACED PRE-SCALER No signal on any channel except sound on Ch. 13 only. Ifexternal voltage was introduced to VC line I could get some of the highband channels, which indicate tuner was good.
SonyKP7220
INSUFFICIENT WIDTH, REPLACED IC-2003 "K" BOARD Unit suddenly had insufficient width to fill the screen.Voltage on 115V regulator on K board was about 10 volts low.
SonyKP5000
POOR PURITY Color purity problems around edge of picture. Problem wascaused by flaking of phosphor edges on all three CRTs.
SonyKV2645R
INCORRECT OPERATION, REPLACED X002 When master power switch turned off and unit allowed to cooldown, it would take approx. 2-3 hours for any function to operate afterapplying power. Cooling the ceramic osc. X002 would cause unit to shutdown and all functions became inoperative.
SonyKV2645R
PICTURE DARK WITH EXCESSIVE COLOR, REPLACED R-751 Color overload or flaming color. Color was especiallyextensive mostly in the red spectrum. Even when the color was turneddown, some overload still existed.
SonyKV1945R
NO AUDIO, REPLACED OPEN R232 AND SHORTED Q205, Q206 No audio.
SonyKV1942R
TUNER DRIFTS, REPLACED ZENER D2103 Tuner drifts off channels and several lights are lit at thesame time. 18 volt line to tuning circuits would be low, about 10 VDC,and problem would occur. D2103 was zenering at lower voltage causing18V line to drop.
SonyKV1913
DARK PICTURE Dark picture.
SonyKV1913
SOUND DISTORTION After warm-up sound would distort and change in volume.
SonyKV1714
SET LOCKS ON CH 2 Set locked on Ch. 2 defective CX804 (IC033) decreasing 35Vsupply.
SonyKV4000
NO TUNING ON VHF LOW No automatic nor manual tuning on VHF low, VHF high andUHF band. Found no voltages at VC terminal of tuner - resistancemeasurement showed short to ground - tracing back found short at M1 plugon M board - Pin 8 shorted to Pin 9.
SonyKV2645R
SNOW PICTURE, REPLACED X001 Intermittently, TV reception would stop except for a verypoor channel 6, snow on all other channels. Address line A always high(11.9V) regardless of channel selected.
SonyKV2643R
PICTURE SHIFTS, DEMAGNETIZED CRT Graphics were shifted to the right. When unit was taken toservice shop and center-cross generator placed on set the centering wasoff approx. 2 inches to the right. All associated circuitry was checkedand found to be in proper operating condition. Repl
SonyKV2643R
NO PICTURE, REPLACED C607 The following parts were bad in this set: Q901, Q902, Q601,R605 open, R609 open, R232 open, connector A-10 on PC board arcing.After all these parts were replaced, the set would come on and thepicture would blink severely, both horizontally and verticall
SonyKV1945R
NO PICTURE, C1008 IN PRESCALER SHORTING TO FRAME The following notes were made in determining problem. 1) Nowave train at PLL IN, TP59. 2) No voltage on Pin 15, IC003. 3) Voltageat tuning point on tuner went to 31.5V and would not vary. Cause - C1008on prescaler was shorting to adjacent frame on p


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