Dicas Reparação SONY
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KV2647R | CONVERGENCE CHANGE IN HOT CONDITION, REPLACE YOKE | After the set would warm up convergence would change. Lowerright corner would start to misconverge and get worse the longer set wason. | ||
| Sony | KV2145R | DEAD, FUSE & DAMPER DIODE | Unit came in with blown DC fuse and a shorted damper diodemounted on the conductor side of board, cathode connected to cathode ofD501 and anode to ground. This is a production mod. and no informationexists as to its type or part number. As it resembles | ||
| Sony | KV1922 | JAIL BARS ON LEFT SIDE | Jail bars on left side. Servicer had replaced flyback andyoke - no help. | ||
| Sony | KV1743R | REPAIR BOARD COMPATIBILITY | Chassis #SCC204A-A found change in M-2 board not reflected onprint. R025 exists in series with IC031. Which print applies? Are thereany other changes? -HQ COMMENTS: R025 resistor's function is to fine tune RC constant forVC formation from PWM pulses. | ||
| Sony | KV1541R | TUNING DRIFT, REPLACED D2007 | After about 8 hours this set would start drifting on low band.Servicer claimed that only ch. 2 and 3 would drift, rest of low band OK.Upon further inspection I determined that what was actually occuring wasthat low band channels were switching into high | ||
| Sony | KV1222R | DEAD | All six above sets were dead out of the carton. Inspectionrevealed no B+ to receiver. I then noted the leads to R901 were bothbroken right at the terminals of the resistor. Throwing out thepossibility of sabotage, it appears that the problem was cause | ||
| Sony | KV1207 | NO PICTURE, SEE SB0200R | Found D064 leaky, this was replaced and 15 days later unitcame back and this time D063 was found to be leaky. Ten days later unitcame back with D063 leaky again. Each time the diode is replaced. | ||
| Sony | KV1206 | LOOSES MEMORY, REPLACED D514 | This receiver had no memory. Stations could be programmed,but would be lost as soon as channel was changed. Inspection revealed thatIC034/Pin 7 was positive, -24V was missing. Scope showed horiz. pulse on-24V line. Further checking quickly revealed D51 | ||
| Sony | KV1200U | INTERMITTENT COLOR DISTORTION, REPLACED C342 | Highly intermittent color-wrong colors-complete loss of color.Drastic hue changes would occur faces would be all blue or all green.Red would drop out completely, then chroma would degenerate into narrowrainbow lines, eventually resulting in absolute loss | ||
| Sony | KP5040 | PARTS AVAILABILITY | Please investigate if the drive cords for the electromotivearms may be available as a separate part for replacement instead ofreplacing the complete arm assy which is so expensive. Refer to page 29of Service Manual. -HQ COMMENTS: The pipe side end of d | ||
| Sony | FD210 | SHIFTED PICTURE, REPLACED YOKE | Picture shifted up and slightly to the left. | ||
| Sony | XR77 | REPLACEMENT OF Q801 | The sound cuts off with a high level bass signal. | ||
| Sony | XO7 | NEW IC USED | The above unit uses uPD1703C517 P/N 8-759-100-18. Thispart is listed on Page 35 of the Preliminary Service Manual. The lastS/M printed list this IC on Page 96 as uPD1703C522 P/N 8-759-100-59.Do they have the same program? If not please inform KC to st | ||
| Sony | WMD6 | DEFECTIVE FE COIL | No control of speed, it is too fast on two stock units. | ||
| Sony | WM10 | CAREFUL REASSEMBLY REQUIRED | The spring was out of the grove on the auto shut offmechanism. After placing spring in grove and reassembling unit, it wouldnot shut off at end of tape. |