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Modelo - Chassis 20
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KV5020 | NARROW PICTURE | Narrow pix - all three CRT's were narrow pix remained ingood convergence. Looked like the low voltage power supply was weak. | ||
| 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 | KV9200 | RETRACE LINES | Customer objected to three-four vertical retrace lines onlyvisible while watching two channels 9 and 32. Lines appeared to sparkleas if they were being modulated with information. Scoping verticalblanking pulse, noticed excessive pulse width. Working | ||
| 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 | KV1207 | PICTURE NOISE | Vertical bars across screen, excess ringing off 190V line offlyback. C540 was missing from circuit. | ||
| Sony | KV1207 | NO LOW VHF | No low VHF channels, voltage on Q102 remains high regardlessof band switch position. Found D059 diode on M4 board leaky. | ||
| Sony | KV1207 | POOR VERTICAL | VC amp leaky. Repaired by replacement Q101, 2SC1815 withreplacement 2SC1364. Unit was OK for 6 weeks, then Q101 failed again insame way. Replaced and checked circuit. Found no reason for failure.Perhaps static problem. Enclosed you will find the ori | ||
| Sony | KP5020 | INCORRECT CONVERGENCE | All three colors would not center properly. Found D5501shorted on DA board. Also schematic is labelled wrong, voltage afterresistor R5597 should read +5 volts but schematic indicates +12Vdc onDA board. | ||
| Sony | KV1207 | NO CHANNEL LOOK | Set changes channel by itself usually ending on Ch. 13position. | ||
| 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 | KP5020 | DEAD | DC block assy failure (distorted waveform) DC fuses open. | ||
| 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. |