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TV Repair Tips

HITACHI

Page 2 of 7
Size Model Chassis Symptom Problem Description Fix
2020VR4B  Shutdown Powers up for a few seconds, then shuts off C670 (100uF/16V)
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 A3LXU3Dead 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
4646EX3BAP-32DeadDead, 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
4646UX7BAP11Powerwon't Power onC913 (47uF/25V), C921(2.2uF/50V), C939 (10uF/25V), C940 (2.2uF/50V)
4646W500DP33WDeadDead, no HV, HOT is OKResolder L920
46CU4600B VP-8X2Video Tuner video smeared, left side darker. other inputs OK C729 (33uF/350V)
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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.