TV Repair: Common Faults and Solutions.
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Results: 87414
Results: 87414
Repair Guide: Common Issues and Fixes
| Brand | Model | Fault | Detailed Problem | Solution | By |
|---|---|---|---|---|---|
| SONY | KV1948R | Ch 14 would not lock, adj t202 and t203 | Ch. 14 would not lock up on a cable co. using the hrc cablesystem, all other channels operate properly. | ||
| SONY | KV1947R | Picture distortion, replace ic501 | Total loss of vertical sync. | ||
| SONY | KV1945RS | No color, replaced bpt, t301 | No color. | ||
| SONY | KV1945RS | No uhf q008 shorted | Would not receive uhf channels. | ||
| SONY | KV1945RS | Incorrect tuning, replaced x003 | No channel indicator (blank), no tuning of signal. voltageson ic001 and ic002 were all wrong. servicer had changed both chips andchecked the clock freq. of ic001 cl1 with a counter, 400khz. when clockwas finally checked with a scope pp v was only 0.5v | ||
| SONY | KV1923 | No picture, has sound, replaced c516 | No picture, just sound. | ||
| SONY | KV1922 | Picture noise | Three inches wide bar at right side of screen top of bottomonly on hbo cable channel and only at customer's home only on thisparticular unit, other units tried and work fine. servicer blamingcable co. found 150pf capacitor between q512 collector and gr | ||
| SONY | KV1915 | Picture distortion | One and half inches of top of picture is black. | ||
| SONY | KV1912 | Tuner locked on ch 2 | Tuner locked on channel 2. | ||
| SONY | KV1910 | Picture stretching after warm up | Picture stretches vertically after about one hour operation. | ||
| SONY | KV1512 | Dead | This unit initially appeared to have a shorted sg613 and2sc867. upon powering up the set with a dc supply it was noticed thatthe waveforms were irregular. closer examination revealed r522 hadchanged in value. | ||
| SONY | KP7220 | Keystone, replaced d5313, d5312, q5537 | Keystone effect on all three tubes. pix normal at top butnarrow at bottom. | ||
| SONY | TV790 | H picture distortion | Horizontal frequency changes after short warm-up. | ||
| SONY | TV123 | No picture | Q502 runs red hot for about one week and then fails, causingno raster. | ||
| SONY | KX1901 | V foldover on the bottom | Severe foldover on bottom. | ||
| SONY | KV2648R | Gray bar on the screen | Gray bar very dark on left side and becoming lighter lookingtoward right side of crt. | ||
| SONY | KV2647R | Jailbars, poor ground on "s" board | Jailbars present on left side of screen more pronounced onthe higher channels. found poor ground on s board opposite the groundingposts from the tuner. | ||
| SONY | KV2647R | No vertical sweep, replace rv2206 | No vertical sweep. voltage at ic501 pin 11 should be 6.3 vdc.actual reading was 2.2 vdc. found vertical hold control had an 8000Ωreading center tap to case at all times. | ||
| SONY | KV2643R | Vertical line on the picture, remount q701 | Vertical line appears in the center of screen on brightscenes. found q701 installed wrong at factory. c was connected to e.b was connected to c and e was connected to b. | ||
| SONY | KV2602 | Picture blanking, adj jerrold cable box, vari-loser | When using models with 30p chassis on cable systems thatscramble the pay channels (by removing the sync pulses at the head end andreinserting them thru a converter) the sync is sometimes compressed tooclose to blanking. this apparently reacts with the k |