HITACHI TV Repair Tips

Size	Model	Chassis	Symptom	Problem Description	Fix
20	20VR4B		Shutdown	Powers up for a few seconds, then shuts off	C670 (100uF/16V)
27	27FX49B	NA6DV	Video	No video or OSD, sound OK	IC451 (LA7838), D561 (ECG552), R552 (2ohm/.5W)
27	27UX5B	A3LXU	Power	TV dies after a while, and won't restart	D744 (HZS12A2 or ECG5021A)
27	CT2647		Video	3 black bars at the top of the pic	C604 (33uF/160V)
27	CT2670	G6LXU	Red Flare	Red flaring on the outline of the picture	Replace C724=4.7uF/250V
32	31DX21B	M1CLXU	Video	Jitter, intermittent vert collapse or varying width	Q706 (2SD2012)
32	32CX11B	A3LXU3	Dead	Dead	D744, Q201
32	32UDX10S	MF1	Loss of Sync	Loss of Sync from tuner or external signal	Resolder or replace I005 (SMD)=BU4053BCF
32	32UX01S	M10LXU	Tuner	Interference in pic	C938 (2200uF, 16V)
42	42EDT41	PW1A	Video	After running for 10 min, thick vertical bar appears on left side of screen	resolder resistors located on ribbons from the panel to X boards
43	43F300	DP-25K	Video	Won't fully converge	RK50 (2.7ohm/1W), RK62 (2.2ohm/1W) RK63 (150ohm/2W), RK46 (1.8ohm/1W), IK05 and IK04 (STR392-110)
43	43FDX15B	DP-15K	OSD	No OSD	C026
46	46EX3B	AP-32	Dead	Dead, will start rarely	C916=CP17 (47uF/25V), C921=CP40 (2.2uF/50V), C939 (10uF/50V)
46	46EX3B	AP-32	Video	No pic in tuner or video, Audio and OSD OK	R3538 (10kohm), Q3508 (2SC458)
46	46EX3B	AP-32	Power	Relay clicks on, does not click off, no HV, no secondary voltages	IC901 (STRM6511)
46	46EX3BS	AP-32	Video	Pic rolling vertically	R993
46	46W500	DP33W	Dead	Dead, no HV, HOT is OK	Resolder L920
46	CU4600B	VP-8X2	Video	Tuner video smeared, left side darker. other inputs OK	C729 (33uF/350V)
46	CU4601B	VP-8X2	Dead	Pincusion, then Died	Jumper traces from L961, C596 and C958 (470uF/63V)
50	50EX10B	AP-32	power	Shuts down after 30 sec	Replace -12V regulator IC933, C945, C950

Size	Model	Chassis	Symptom	Problem Description	Fix
50	50FX18B	AP-62	Power	Locks up when OSD is on	I001 and I002
50	50FX18B	AP-62	Video	S shaped line in pic after magic focus	Replace defective DCU
50	50FX18B	AP-62	Power	shuts down intermittently	Leaky Q913
50	50FX18B	AP-62	Video	intermittent loss of video	15A4, CN05, CN06
50	50FX18B	AP-62	video	close captioning keeps coming on	I001, I002
50	50FX18B	AP-62	Audio	No Audio	D309
50	50FX18B	AP-62	Tuner	No channels above 22	I002
50	50FX18B	AP-62	Power	no power, no relay click	Q902, D912
50	50FX18B	AP-62	Video	focus drifts	Defective EFPK
50	50FX20B	HP-11	Dead	No sound or video	L204 on terminal PCB
50	50SBX78B	AP-82	Convergence	convergence changes intermittently	replace DCU
50	50SBX78B	AP-82	Convergence	Red convergence intermittent	Cold Solder joint on RK46
50	50SBX78B	AP-82	Dead	clicks and shuts down	E994 (fuse), C707 (.01uF/2kV)
50	50SBX78B	AP-82	Video	Horizontal lines and black box when any remote button pressed	I102
50	50SBX78B	AP-82	Video	intermittent video	Replace 3D Y/C comb filter
50	50SBX78B	AP-82	Video	low contrast on all inputs	IY01
50	50SBX78B	AP-82	Video	no brightness	C724
50	50SBX78B	AP-82	Video	dark edges, especially in motion	EEPROM
50	50SBX78B	AP-82	Video	Red misconverges	IK04, IK05
50	50SBX78B	AP-82	Video	Picture is smeared	replace 3D comb filter

Size	Model	Chassis	Symptom	Problem Description	Fix
50	50SBX78B	AP-82	Video	square box and dots on screen	needs memory initialization
50	50SBX78B	AP-82	Audio	replaced I401, but still no audio	need memory initialization
50	50SBX78B	AP-82	TV Guide	Will not load TV Guide +	replaced Guide + module
50	50SBX78B	AP-82	Video	Picture is dark, if you turn up screen you see retrace lines	Q806
50	50SBX78B	AP-82	Power	shutdown	I902, I905, I903, E994
50	50SBX78B	AP-82	Power	click and shutdown, E994 open	C707
50	50SBX78B	AP-82	audio	no audio	Q013
50	50UX11K	AP-23	Video	Unstable Video with many misc symptoms	Replace all surface mount electrolytic caps (4) on M301 (one is NP)
50	50UX22B	AP-53	Video	No video, but audio and OSD are OK	R708 (47kohm/.5W, on def PCB)
50	50UX27K	AP-63	Power	Shutsdown	STRM6511, resolder I907
50	50UX58B	AP-83	Convergence	All 3 CRTs out of alignment, will not adjust	Replaced both convergence ICs (STK392-110) then used the factory realignment procedure
50	50UX58B	AP-83	Video	sides pulled in	C605 (4500pF, in pincushion circuit)
50	50V500	LC-37	Video	All video inputs have red blob in center	Replace light engine
50	CU5001B	VP-8X2	Convergence	Convergence Off	C7002, C301, ZD7002, D735, D726
53	53FDX01B	DP-05F	Convergence	Convergence is bad	convergence repair kit (X480301, 6 resistors and 2 STK?s)
53	53FDX20B	DP-15H	Video	Red light is on, but no pic or OSD	C603= .068uF/50V poly cap
53	53SDX89BA	DP-86V	Dead	Dead, noise from flyback	Replace flyback transformer BW00633
53	53UWX10BA	DP-14G	Video	Pic is smeared and dark	IC01= TA1316AN
60	60FX32B	AP-5X and AP-6X	Video	No color or intermittent color	Replace XX02, XX03, IX01, X501, C505
60	60FX32B	AP-62	Convergence	convergence doesn't align	replaced all 3 STK convergence chips. Perform convergence in service mode.

Size	Model	Chassis	Symptom	Problem Description	Fix
60	60SDX88B	DP-86	Power	shuts down	Q401, D441
60	60SDX88B	DP-86	Power	shutdown	R777, Q657, EP98
60	60SDX88B	DP-86	Dead	Dead	I901 and D907
60	60SDX88B	DP-86	Power	x-ray protect shutdown	replace IH02
60	60SDX88B	DP-86	Dead	Shutdown	DH41
60	60SDX88B	DP-86	Video	Pincushion	Q657
60	60SDX88B	DP-86	Power	Shutdown	QH01, C655, IP05, IP06, DP05, DP39
60	60SX2K	AP-24	Convergence	convergence doesn't align	replaced all 2 STK convergence chips, replaced all SMD caps in digital comb filter
70	70VS810	LC-48B	Video	Pic goes green, red, dark, light intermittently	Drive PCB assy (#JP07452)
70	70VS810	LC-48B	Video	When using the HDMI connection, black picture with no sync on the OSD	Clean HDMI jack with rubbing alcohol
70	70VS810	LC-48B	Power	All front LED indicators are flashing in sequence, may be intermittent	Replace the lamp
		AP-1X	Audio	High pitched whistle in audio	IC4001 (2003425) also check Q4013 and Q4008
		AP-1X	Power	Intermittently goes dead	T701 needs resoldered (Horz driver, 2260291)
		AP-1X	Tuner	Channels won't stay in memory	Memory IC0002 (2381111)
		AP-1X	Dead	Dead	Q777 (2SC4589)
		AP-1X	Video	no color	X-501 (#2791501), C-508 (#0246443), ZD-7004 (#2331949)
		AP-1X	Video	weak color, tint may be wrong	ZD-306, ZD-307 (both #2339868M)
		AP-2X	Audio	High pitched whine in audio	IC4001 (2003425) also check Q4013 and Q4008
		AP-2X	Power	Intermittently goes dead	T701 needs resoldered (Horz driver, 2260291)
		AP-2X	Tuner	Channels won't stay in memory	Memory IC0002 (2381111)

Source : http://www.riddledtv.com