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TV Repair Tips

HITACHI

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Size Model Chassis Symptom Problem Description Fix
4343FWX20B VideoConvergence can't alignClear DCU adj centering mag for correct offset for Red, Green, Blue according to service manual
4343FWX20B VideoPicture freezesadd jumper from pin 1 of I007 to Cathode of D019
4343FWX20B PowerShuts downTH01
4646EX3BAP-32PowerDead, will start rarelyC916=CP17 (47uF/25V), C921=CP40 (2.2uF/50V), C939 (10uF/50V)
4646EX3BAP-32Video No pic in tuner or video, Audio and OSD OK R3538 (10kohm), Q3508 (2SC458)
4646EX3B AP-32 Power Relay clicks on, does not click off, no HV, no secondary voltages IC901 (STRM6511)
4646EX3BS AP-32 Video Pic rolling vertically R993
4646UX10 Powerno HV, just noise for soundresolder T701
4646UX12B AudioHum in AudioC417
4646UX12B Powershuts down at power upQ935 (2SA778AK), C985 (47uF/16V)
4646UX12B Powerrelay clicks, powers up, then shuts downQ902
4646UX12B Powerstarts after relay click, but then shuts downD903
4646UX12B TunerIntermittently loses channelsZD-008, C0062
4646UX12B Audioloss of audioQ403, Q404
4646UX12B VideoLoss of colorZD-5514
4646UX12B Audiono audio in TV mode, video inputs okayMTS PCB
4646UX12B VideoLoss of brightnessIC-006
4646UX12B Videono OSDZD004, ZD005
4646UX12B Videotint is bad, can't be correctedIC0006
4646UX12B VideoPicture is darkZD5514
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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.