TV Repair: Common Faults and Solutions.
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Results: 87441
Results: 87441
Repair Guide: Common Issues and Fixes
| Brand | Model | Fault | Detailed Problem | Solution | By |
|---|---|---|---|---|---|
| SONY | TAM50 | Unit dead, does not respond to any button - all lights off | Unit is dead. does not respond to any button. none of thelights turn on and no beep is heard.the micro ic-3 had all the right voltages, except for ic-3/pin 8 which waslow instead of high. found that the time stamp ic-10 had no supplyvoltage. | ||
| SONY | CCDTR5 | Dew and rec (vtr) light stays on, camera video flickers | Dew light and vtr rec light stays on and camera videoflickers. dew and vtr rec light do not affect vtr functions. | ||
| SONY | KV2780R | No pincushion, replace r-1514 | Unit had no pincushion correction. collector of q-1501 had dcbut, no waveshape. there was signal present at pin 3 of ic-1502 and atone side of r-1514. | ||
| SONY | KV27HFR | Vertical rolling of picture, replace r-527 | Checked the signal of ic-301 pins 47 and 48 found the synclevel at pin 48 was rounded off. checked surounding components and foundr-527 had increased in value. i also checked c-520. | ||
| SONY | CFSW303 | Wrong part numbers in manual for motors | The service manual has the wrong part numbers for the twomotors m-471 and m-481. the correct number for m-471 (deck b motor) hasbeen verified, but not for m-481 (deck a). the error seems to be only inthe later service manual which contains the aep mode | ||
| SONY | STRAV910 | Error in schematic and parts list for q-721 | The schematic and the parts list show this transistor as apnp, 2sa1841. in reality this is a npn, 2sc-1841 in the set. please explain is this an error and should a correction be made? -hq comments: the service manual has a misprint. if you reference | ||
| SONY | KV27TS22 | Intermittent video blanking, replace reg ic-601 | As the ac line voltage would fluctualte, the video wouldbecome blanked out in an area that would vary in size and shape. the135vdc line never increased over 117vdc. note: the blanked portions ofthe video would take weird sizes and shapes. | ||
| SONY | KPR4600B | No last channel memory at turn on, replaced q-308 and d-339 | No last channel memory at turn on. also the set wouldintermittently come on with a de-tuned picture or possibly a weirdcombination of numbers in the channel display area. we noted the resetvoltage to pin 7, ic-001 on m board never got over 1.5vdc and a | ||
| SONY | WMAF62 | No display | No display. tape worked. radio had static on am and fm, andvdd was at 0v. | ||
| SONY | WMAF62 | No fm, static | Vco was ok, am was ok and stations would scan on display butnot lock in on fm. on known station you will get static. ic-101 allvoltages were ok. ic-001 pins 1, 2 and 4 were low. i had this problemthree times in three months. | ||
| SONY | KV32CX10 | Purity, aperture grill came off, replaced crt | Aperture broken lose. | ||
| SONY | KV27TS25 | Poor picture, crt | Measured low emission. | ||
| SONY | KV27TW70 | Poor picture, low emission crt | Measured low emission. | ||
| SONY | KV19TR20 | Arcing, crt | Internal arcing. | ||
| SONY | WMAF58 | Part number missing for battery tube | There is no part number listed in the s/m for the batterytube. -hq comments: part number is 3-351-508-01. | ||
| SONY | WMAF54 | Part number missing for battery tube | There is no part number in the s/m for the battery tube. -hq comments: the part number is 3-351-508-01. | ||
| SONY | KPR4110 | New "e" boards defective, -18v shorted, tokyo has corrected | Original e board had a hole burned in it. customerpurchased a replacement board which did not work. two other replacementswere tried. in each case the board had the -18vdc line shorted toground, via a jumper. by removing the jumper the set would come | ||
| SONY | KV32XBR70 | No picture, ik related troubleshooting tip | As you may have noticed, when servicing this and other unitsusing this particular ic-301, rgb lines at the ic level are blanked any-time the c board is disconnected. the main reason for this blanking isa cathode current detect line (ik). when the unit | ||
| SONY | KV32XBR65 | No picture, troubleshooting hints | As you may have noticed, when servicing this and other unitsusing this particular ic-301, rgb lines at the ic level are blanked any-time the c board is disconnected. the main reason for this blanking isa cathode current detect line (ik). when the unit | ||
| SONY | KV32XBR50 | No picture, troubleshooting hints | As you may have noticed, when servicing this and other unitsusing this particular ic-301, rgb lines at the ic level are blanked any-time the c board is disconnected. the main reason for this blanking isa cathode current detect line (ik). when the unit |