TV Repair: Common Faults and Solutions.
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Results: 87425
Results: 87425
Repair Guide: Common Issues and Fixes
| Brand | Model | Fault | Detailed Problem | Solution | By |
|---|---|---|---|---|---|
| SONY | KV2783R | Dead, replace fbt and fuse | Fuse f501 was blown, after replacing fuse, humming noise fromflyback and waveform at hor. out. collector had several humps. alsocredit j. shirley with this report 12/08/92. also pertains to serialnumber 7004483. | ||
| SONY | SLHF1000 | Shuts off | Unit shuts off when during stop mode, the superbeta switch isdepressed. -hq comments: found tracings on board touching (fr-25). tracings forhigh band led and power switch touching. | ||
| SONY | CCDV110 | Viewfinder | Pix in viewfinder rolls during playback and record no u sync.pix on monitor is fine during playback and record. note this problem wasoccurred 3-4 times and have had calls from other fsc's experiencing sameproblem. | ||
| SONY | CFS700 | Antenna base too large-temporary parts problem | The part of the antenna that fits into the case is too large. | ||
| SONY | CCDV3 | No raster - viewfinder | No picture in the viewfinder, problem traced to the connectorcn207 on the mv-11 board. resoldered all 8 pins, unit came on. you couldnot see anything wrong. this is the second unit i have come across withthe same problem, just soldering the pins unit | ||
| SONY | CCDV110 | No autofocus due to ps801 open | Fuse open (ps801) on auto focus board, replaced fuse, noticedthat support strap metal would short out to af-23 board when handle wasgrasp and blow the fuse again. inserted insulation between af-23 boardand strap. replaced the fuse again. unit worked o | ||
| SONY | KV25XBR | Line in picture | 1/2 black line down left side of pix. c1657 apparently opening up. we have seen this cap bad on 3 sets. this repair was the second time cap had failed on this set. | ||
| SONY | KV25XBR | No brightness after warm-up | After approx. 10 min warm-up pix would dim. g2 volts woulddrop approx. 80v while g1 volts would rise approx 80v indicating internalshort in crt. | ||
| SONY | KPR4620 | Dark line in picture, replaced c-5079 (e board) | Black bar approx. 1/8 horiz. across center of screen. some-times would be 2 or 3 bars. troubleshooting 18v line it was noticed thathash appeared on 12v line after ic5005 12v ref. external supply hooked to12v and line and bar disappeared. further check | ||
| SONY | CCDV110 | No picture in vf | In camera mode, raster but no pix in viewfinder. pix okduring p/b. signal tracing found video missing pin 39 ic703. dc ok. | ||
| SONY | TCU270 | P/n for 13 pin connector cord | Service manual doesn't have a p/n for the 13 pin ribbonconnector needed to connect the tc-u270 to the avu-270. -hq comments: the part number is in the tc-u270 s/m. the p/n is1-558-156-11. the description is limited to cord, connection. | ||
| SONY | KPR4620 | No picture, replaced d-17, l-8 (e board), see sb #27 | Picture is muted, hv is present and sleep light comes on thengoes off. l8 opens up, d17 defective. | ||
| SONY | SSCD5 | Availability of s/m | Customer would like to order a s/m. what is the availabilityof this manual? -hq comments: the ssc-d5 is identical to the avc-d5. please send thats/m to the customer. p/n 9-966-922-01. | ||
| SONY | XR70 | Missing part number | The service manual does not give the part number for thecnp-901-902 cable and connector assembly for this unit. i have a unitthat needs these cables. -hq comments: these connectors are shown on page 25 of the s/m(ref. #16). the p/n is 1-555-525-00. | ||
| SONY | CCDV110 | No color | No color. replaced ic two times. after replacing ic unit hadno lum. or chroma. put old chip back unit had lum., but still no color.original part cx-20151 8623-n65replacement part cx-20151 8623-4103 -hq comments: there have been no reports | ||
| SONY | SPP100 | Hand unit will not acknowledge | The hand unit would not acknowledge a command from the baseunit. we found that the front end of the hand unit was working, butthat the upc would not respond to the incoming msk and set the localosc. to the correct freq. the problem was caused by poor s | ||
| SONY | KV25XBR | Excessive high voltage | The unit was producing too much hv and going into shut down.we found the problem to be caused by a defective c1664 on the d board.this cap is supposed to be a 0.025uf, however, it had decreased to approx.0.016 which of course changed the tuning. | ||
| SONY | KV2657R | No volume or picture control | There was no picture or sound control. unit would power upand change channels, led indicators worked. found the problem to becaused by two shorted buffers - q005 and q006. it is strange that theupc was not defective. i suspect that this was lightning | ||
| SONY | KV1542R | No color on channel 6, aligned l175 | All functions appeared to work fine except that there was nocolor on ch. 6 when i looked at the unit. the tuner had already beenreplaced. found vc and bandswitch to be correct. resolved the problem bytweeking l175 in the local oscillator of the tuner. | ||
| SONY | TC850 | Tape lifter mechanism intermittently activates in off mode | The tape lifter would intermittently engage when the circuitwas switched off. this of course prevented the tape from contacting thehead. we found the problem to be caused by a leaky q605 on the systemcontrol board. this was preventing the b+ reg. from |