Dicas Reparação
Modelo - Chassis KP7220
Pesquisa: KP7220 Enviar Dica Resolvida
Resultados 12
Pedir dica reparação
| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KP7220 | PICTURE NARROW BEFORE IT WENT OUT, REPLACED C541,F801,F601 | Inoperative set, F-801 and F-602 open 2 Ohms on +135 volt B+line to ground. Eliminated connectors G-17, G-5, G-6, G-7, G-14 and G-15.Still 2 Ohms to ground. Opened C-538, D-514, C-539 and checked D-515.Still 2 Ohms to ground. Opened C-541 and short wa | ||
| Sony | KP7220 | RED WIDTH WOULD EXPAND AND CONTRACT INTERMITTENTLY, D5306 | Red width would expand and contract intermittently. Knowingthat D-5306 controls the B+ voltage to the red convergence output circuitin the horizontal section, found B+ at D-5306 anode varying the circuit.All other circuits stable measured D-5306, found | ||
| Sony | KP7220 | ERRATIC TUNING AND DISTORTED PICTURE, REPLACED R547, R546 | Picture is dark and shrunken in on sides, will not staytuned on channel selected. Tuning is erratic. | ||
| Sony | KP7220 | NO BLUE, REPLACED CRT AND D5320 | The stopper diode associated with the blue CRT was shortingout about every 30-60 days. We found the problem to be caused by adefective CRT. The CRT was intermittently shorting. Evidently when alarge enough arc occurred the associated transient would d | ||
| Sony | KP7220 | FAINT CROSS HATCH ON THE SCREEN, REPLACED D303 | This unit had a faint cross hatch superimposed on picture. | ||
| Sony | KP7220 | KEYSTONE, REPLACED D5313, D5312, Q5537 | Keystone effect on all three tubes. Pix normal at top butnarrow at bottom. | ||
| Sony | KP7220 | PICTURE DISTORTION, REPLACED D5319 | Overscan. | ||
| Sony | KP7220 | NO PICTURE, CONNECTOR DA-5 INTERMITTENT | Connector DA-5 gets loose and causes picture tubes to blankout, can also cause a line on green tube which burns to mark in tube. | ||
| Sony | KP7220 | PICTURE DISTORTION | Set had about 8 inch overscan. Found set-up cord was18 inches too long. | ||
| Sony | KP7220 | INSUFFICIENT VERT HEIGHT, REPLACED C5521 | Insufficient vertical height on all three CRTs: about 3inches short top and bottom of the screen. Found vertical sawtooth atbase of Q5510 (on DA board) reading 2.4Vpp, should have read 3Vpp. | ||
| Sony | KP7220 | 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. | ||
| Sony | KP7220 | INCORRECT BLUE CONVERGENCE, REPLACED D5320 | This unit had a blue convergence problem. The blue verticallines were wider than the red or green. |