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Harry
HITACHI
Thu Dec 18, 2003 3:38pm
24.235.161.123


Hitachi
Model 50UX58B
Chassis:AP8X
Will not power up
Zener Diodes in primary of power supply D906,D907, D910,D911.
Comments:This applies to most of the Hitachi projection tvs from 1995 to present.Replace,do not test,any zeners in the primary of the power supplies.

Hitachi
27CX21B
M3LXU2
INTERMITTANT VERT SWEEP PROBLEM VENETIAN BLIND EFFECT
REPAIRED BAD SOLDER AT R609

Hitachi
Model:CF27H50
Chassis:
HV comes up then collapses immediately power led flashes
Q801(STRZ4214),Q471 & Q472,C449

Hitachi
Model:CT2250W
Chassis:
No audio
Replaced C457 47uf @ 16v

Hitachi
Model:35UX85B
Chassis:
Dead, Relay clicks HOT reads shorted in circuit C-E
HOT is NOT shorted (when measured out of circuit, C715 is shorted 2200pf @2kv pn 0244729

Hitachi
Model:50UXB7B
Chassis:
Dark, Distorted pict. pulls to right, PIP not working right
Replaced on comb filter C201,217 both 1uf and C001 10uf smd

Hitachi
Model:27CX1B
Chassis:
shuts down after turn on
F601 and connection
Comments:look at pico fuse .75 amp and chk to see if open and repair solder conn on rectifier located at the base of the H.O.Transistor ..

Hitachi
Model:43GX01B
Chassis:AP74
No main video luminance, PIP OK
Change Q512 on video module AP9X

Hitachi
Model:CT7881B
Chassis:G9LXU
faint dots intermmittet flashes in picture
repair bad connections in tuner

Hitachi
Model:43FDX01B
Chassis:
Dead
IP01 CZ00865 (STR-F6629B) & EP91 7amp protector

Hitachi
Model:CU4601B Projo
Chassis:
No Power up
Corroded Area On Power Supply Board Near Smps Transformer.

Hitachi
Model:CT2020W
Chassis:NP83X-5
Picture flutters when first turned on. OK after short warmup period.
C949 a 47uF @ 200 Vdc. on Power supply board.

Hitachi
Model:27ax2b
Chassis:
dead
(c724 2200pfd@2kv)(c631 220@6.3v)(c927 220@6.3v)

Hitachi
13GA1B
Chassis:NA
insuficent vertical
C608 fixed set

Hitachi
50fx18b
Chassis:
set shuts down after 5-10 min.
replace Q928

Hitachi
Model:27AX2B
Chassis:M1LXU
no High Voltage start when cold
C929 10uf 16V
Comments:cap is in cneter of board between 2 heat sinks

Hitachi
Model:50dx10b
Chassis:
vert collaspe on top of pix, with vert horz blanking
replace D611, with ECG-125 diode off pin 13 of IC I601

Hitachi
Model:50dx10b
Chassis:
vert collaspe on top of pix, with vert horz blanking
replace D611, with ECG-125 diode off pin 13 of IC I601

Hitachi
Model:27ax3b
Chassis:
picture pulled in on sides
ic901 str30130
Comments:ic is running hot. havent found out why. maybe it just does.

Hitachi
Model:ts-2214
Chassis:np83lx
Missing vertical top & Blanking problem
c608 33mf/160v
Comments:when turned on large blanking appears on right side and missing top of pict.

Hitachi
Model:27CX6B
Chassis:M3LXU
shutdown
F601 open
Comments:F601 feeds the vertical IC I601 check also,other possible items to cause shutdown are C915, C725, or install cap 0.47uf across R302

Hitachi
51uwx20B/DP-23
Screen and images turn white, tv shutdown no power.
Replace IC I401 Part Number CP08191U
Comments:You can reduce the screen voltage and the set should power on to test terminal inputs and monitor out signals...I found that my video was good to rainforest ic.... I replaced rainforest ic and restored normal operation.

Hitachi
36CX39B / ML9LXU
No Vertical sweep.
Defective solder connections at IC601 (LA7838)

hitachi
31KX41K
erratic hard start ... standbys all ok
leaky diode D0107

Hitachi
31CX4B
Set will start up when first switched on and play ok but if set is switched off will not start back up until set stays unplugged for several minutes.
D744 12 volt zener dioded defective

Hitachi
Model:32CX11B
CY61
Dead No Video, No Audio
Video Repair D744 12V zener diode, Audio Repair Q201 2SC485
Comments:Came in dead. I've got the video up and running. D744 (zener diode >> 12V) did the job on the Video. Still have Audio problem. If I turn the >> Volume up I can hear audio but very low no matter how hi I run it up. >> Next we hooked a VCR to Avx 1 R and L audio worked fine. Using the >> block diagram backed tracked and found Q201 2SC485 leaky. Replaced and >> FIXED!

Hitachi
CT19B5
N/A Mfg 11-85
Picture dim, pulled in on rt side, with weave.
IC901 (STR30135); C904 (100/200v); C908 (33/160v)
Parts replacement restored proper operation, w/good pict.

Hitachi
Model: 32CX32B
Chassis: A3LXU
Int or no start
D744 12v zener diode in horiz. drive circuit OPEN
Comments: This is the "tickle diode" that gets the horz running until the FBT takes over


    • Hitachi TV & vcrsHarry, Mon Sep 6 11:17am
      Hitachi TV CT2646 Customer Complaint: 3 black bar at the top of the picture. There was a black bar at the top of the raster, and there was no vertical foldover. C604 a 33uf 160V capacitor was open.... more
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