Dicas Reparação
Modelo - Chassis D4
Pesquisa: D4 Enviar Dica Resolvida
Resultados 434
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | FD42A | NO PIX, REPLACED Q802, D802, IC601 AND Q602 | 1. No picture. 2. No high voltage. 3. Bad keystone.1. Weak drive signal on Q801 base.2. Open Q802.3. No drive of pin 5 (IC601) open Q602. | ||
| Sony | FD42A | NO VIDEO, RESOLDERED Q401 | Cold solder on collector of Q401. | ||
| Sony | FD42A | PICTURE DISPLAYED KEYSTONE, Q602 | Picture displayed keystone problem, more severe with batteryoperation than with AC adaptor. See picture. Picture severely pulled intoward center at top of raster, from both sides. Waveform at collector ofQ602 was distorted. Resistance between E to B | ||
| Sony | FD42A | RV851 AND RV502 ARE REVERSED | Vertical size adjustment control RV851 and keystone adj.RV502 are reversed. That is, RV851 is the keystone adj. and RV502 is thesize adj. Schematic is correct. -HQ COMMENTS: We will publish a correction on this. | ||
| Sony | FD42A | KEYSTONE, REPLACED D602 | Unit had keystone problem, traced problem to base of regulatorQ602. Had a 5Vpp (mostly negative) waveform, nothing at collector.Found diode D602 open, not clamping negative half of waveform. | ||
| Sony | FD45A | MANUAL CORRECTION, CRT P/N 8736-853-05 | Part number in manual does not exist according to Kansas City,part number listed is 8-736-853-01. Should have been 8-736-853-05.This is a CRT, Ref # V901 listed on Page 31. -HQ COMMENTS: We sent information to Japan, will issue a S/B about this. | ||
| Sony | FD40A | ABSENCE OF VIDEO, ROTATED YOKE | Complaint was absence of video, raster was OK. Please notethat if anyone has replaced the picture tube on these units and acci-dentally installed the yoke 180 degrees out of position, the receiver willnot produce video. | ||
| Sony | FD40A | POOR VERTICAL SYNC, REPLACED IC201 | Poor vertical sync on TV operation. A/V input OK. Found weakvideo signal at CF201, but DC voltages checked OK on IC201. | ||
| Sony | FD40A | TRAPEZOID EFFECT ON SCREEN, REPLACED Q806 | Set came in with Q602, D603 defective. Replaced parts turnset on and 17V line was being load down to 8V causing Q602 to overheat.In process of troubleshooting found waveform at junction of R871, 872distorted. Checked collector of Q805 also distorted. | ||
| Sony | FD40A | TWO VERSIONS OF THE MOUNTED D BOARD, SEE SUPPLEMENT NO.2 | There are apparently two versions of the mounted D board beingdistributed under part # A-3015-311-A. They are different particularlyaround Q303. Lead wires are also mounted to the boards in differentspots. Number printed on boards, 1-613-769-11, same | ||
| Sony | FD40A | DEAD, REPLACED Q602 AND LEAKY D602 | Q602 melted because D602 was leaking. Fuse not blown. | ||
| Sony | FD40A | PIN CUSHION DISTORTION, REPLACED Q856 | Set displayed severe pincushion distortion. Inspection ofthis transistor revealed E to B region was open. | ||
| Sony | FD40A | RASTER DISTORTION WHEN MOVED WITHIN ANY MAGNETIC FIELD | When unit is moved, distortion occurs in raster, ie, bottom ofthe screen will bend causing distortion in scan lines and the raster willexpand and contract causing a change in size. -HQ COMMENTS: The symptom you are describing is common to all CRTs. Iti | ||
| Sony | FD40A | KEYSTONE PICTURE, REPLACED Q601 | Keystone raster. Found no 17 volts being generated. |