TV Repair: Common Faults and Solutions.
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Results: 87420
Results: 87420
Repair Guide: Common Issues and Fixes
| Brand | Model | Fault | Detailed Problem | Solution | By |
|---|---|---|---|---|---|
| SONY | XR747R | Part no problem in manual | Above part number not in system. looking at fiche i foundpart number a-3217-255-a as correct number for filter assy in xr-747r. -hq comments: the number from the microfiche is correct (a-3217-255-a).a service bulletin will be issued. | ||
| SONY | CCDV8AFU | Distorted camera output | Sample crystal changed oscillator frequency from 28.6mhz to5mhz after 10 minutes. | ||
| SONY | VTX1100R | Dc to dc converter runs extremely hot | Dc to dc converter runs extremely hot. this is the secondunit at same dealer location within 30 days. -hq comments: q112 failure is rather accidental and its replacementshould be sufficient. we can protect q112 by adding 33Ω 1/6w(1-247-795-00) resi | ||
| SONY | TAAX5 | Intermittent engagement of the speaker protection circuit | Intermittently the speaker protection circuit would engagewithout any apparent reason. we found that intermittently there would beapprox. 1v on pin 4 of ic401/protector. we traced the problem back toconductive glue found in the area of ry301. | ||
| SONY | HVC2800 | Horiz jitter/pulling | The picture would jitter horiz and pull in from the leftside. we found the output waveforms to be distorted around ic4/horiz out. | ||
| SONY | CCDV8AFU | Tape jams around drum during threading | When a new tape is inserted, and tape starts to thread, itjams around the drum assy. this happens because there is no excess tapewhich can be pulled out from take up reel. -hq comments: under normal operation, the tape is fast forwarded for afew second | ||
| SONY | WMF100 | No part number - door latch | Need part number for the latch that holds the cassette doorshut. -hq comments: there are two types of design for this part. originaldesign had latch riveted to chassis p/n x-3329-721-1. new type is screwedon p/n 3-329-706-04 for latch and p/n 3-333-12 | ||
| SONY | CCDV8AFU | No drum lock | Unit would not drum lock, sound distorted. intermittent shut-down due to overheating of ic501, q501 and l502 (too hot to touch). usingscope checked outputs at ic501 pins 3, 22, 24 and pins - no output.traced back to q508 tf4 amp. | ||
| SONY | KV25XBR | Only channel up switch would work | Only channel up switch would work. all other functions wereinoperative. | ||
| SONY | SPKM8 | Leak sensor always active | The water leakage checking window always is red and the !indication always appears in the window, even when unit is dry. | ||
| SONY | KV1957R | Horiz. output transistor would get very hot, r522 replaced | Horizontal output transistor would get very hot and eventuallyfail. inspection revealed that r522 had increased in value. | ||
| SONY | KV1975R | Dead, replace q501, t501 and r522 | The unit would not power up. we found the problem to becaused by a shorted horiz. drive transistor. the horiz. drive transformerand collector resistor were also defective. while this is not an unusualproblem, it is interesting to note that these compo | ||
| SONY | CDP70 | Hiss in left and right channels | There was a hiss in both channels which was present in betweentracks and with the audio. we found the problem to be a dead x103 on thed/a converter -ic109. i was surprised that any audio at all was processedthrough the ic under this condition. this ap | ||
| SONY | CDP70 | No laser output after install new top ass | Assembly is being received with jumper in following positions.(see diagram) | ||
| SONY | KV2080R | Audio noise, add capacitors | Annoying high pitch sounds from audio (not horiz squeal).hisses and high freq from audio may be because our audio does stretchtowards the high end and tv sound is just not that good. | ||
| SONY | CCDV8AFU | Counter will not read | Counter will not change, stays in the 000 position. foundsensor ph602 defective. | ||
| SONY | BMC200 | No color | Unit had no color. black/white ok. going through alignment,could not balance horiz. (h. balance adj. on page 8, section 2-2-1).output on one side was half the other, that is why we had a good black/white. | ||
| SONY | KV1952RS | Poor low band reception, replace band sw ic002 | The unit had a snowy picture on #2 and progressively gotbetter through #5. high band and uhf worked ok. we found the power supply ofthe problem to be a defective band switch ic. in the low position the h/sterminal on the tuner is supposed to be -10v. it wa | ||
| SONY | KV1943R | Fold over on top of picture, replaced c-523 | The unit has a fold over on the top of the picture and doesnot fill the screen. the problem is caused by c-523 drying out. this isbecoming a more common problem with this chassis now because the capacitoris located near components that become warm and | ||
| SONY | SLHF300 | Won't hold station memory | The tuner would not hold memory. we found r39, r40 and c22to be missing from the ss-32 board. they never had been installed.after installing the correct parts the unit operated correctly. -hq comments: we will watch closely for similar problems and co |