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TV Repair Tips

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Size Model Chassis Symptom Problem Description Fix
2020VR4B  Shutdown Powers up for a few seconds, then shuts off C670 (100uF/16V)
2727CX5B VideoNo video, Sound OKCBH1 (0.22uF, filter cap)
2727FX49BNA6DVVideo No video or OSD, sound OK IC451 (LA7838), D561 (ECG552), R552 (2ohm/.5W)
2727UX5BA3LXUPowerTV dies after a while, and won't restartD744 (HZS12A2 or ECG5021A)
27CT2647 Video3 black bars at the top of the picC604 (33uF/160V)
27CT2670G6LXU Red Flare Red flaring on the outline of the picture Replace C724=4.7uF/250V
3231DX21B M1CLXUVideo Jitter, intermittent vert collapse or varying width Q706 (2SD2012)
3232CX11B A3LXU3Power Dead D744, Q201
3232UDX10S MF1Loss of Sync Loss of Sync from tuner or external signal Resolder or replace I005 (SMD)=BU4053BCF
3232UX01SM10LXUTunerInterference in picC938 (2200uF, 16V)
4242EDT41PW1AVideoAfter running for 10 min, thick vertical bar appears on left side of screenresolder resistors located on ribbons from the panel to X boards
4343F300DP-25KVideoWon't fully convergeRK50 (2.7ohm/1W), RK62 (2.2ohm/1W) RK63 (150ohm/2W), RK46 (1.8ohm/1W), IK05 and IK04 (STR392-110)
4343FDX15B DP-15KOSD No OSD C026
4343FWX20B VideoFocus on left and Right badAdd 2 Spark Gaps (#CJ00072R), between pin 4 & 5 and one between pin 8 & 5 of TF01
4343FWX20B Powerno video, audio, or OSDQ445
4343FWX20B VideoNo videoL306
4343FWX20BzzVideoHorizontal noise in picture on first turnonwiggle anode connector to identify weak connection. If this causes the symptom, replace the lead
4343FWX20BzzVideoScreen displays lockedresolder IC003 pin 1
4343FWX20BzzPowerIC401 fails multiple timesC417, add C480 (.1uF/50V) to pin 40 and 44 of IC401
4343FWX20BzzVideoScreen freezes, and other weird eeprom type problemsjumper I007 pin 1 to Cathode of D019
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Warning

: Don't kill yourself.  If you do, don't blame us...  We totally warned you.  These tips are intended for qualified service technicians that know what they're doing.  Unqualified persons should never service their own equipment.  Televisions contain very high voltage that could kill you.