Maker Pro
Maker Pro

27" Hitachi tv model:27CX7B,chassis:M3LXU2

S

Sidney

Jan 1, 1970
0
27" Hitachi stereo tv model:27CX7B,chassis:M3LXU2,year:June 96,PIP
with S-VHS input.3 months ago the customer dropped the tv off for
repair because of no power so I replaced the following parts:

In SMPS:
C918=100 Uf,6.3v
C920=100 Uf,16v
C923=470 Uf,16v

In Horizontal driver section:
C925=1 Uf,160v

In other areas:
C729=470 Uf,25v
C711=470 Uf,35v
C706=470 Uf,16v

In vertical section (as preventative maintenance)
C606=100 Uf,35v
C702=10 Uf,16v
C603=10 Uf,16v
C613=2.2 Uf,50v
C728=330 Uf,6.3v

And now three months later the customer called today and said no power
again,he has not dropped it off yet but I would like to know if anyone
has access to Hitachi repair tips for this model/chassis from all of
those tips repair sites.
Thanks in advance.

Sidney
Dartmouth,Nova Scotia (the land of berries)
Canada
 
S

Sidney

Jan 1, 1970
0
Apperently the tv below is missing the 5v vcc (B+) for the micro and I
have not accessed Hitachi's free service manuals site in several
months so my account became automatically deleted so I reapplied and
it may take several days so in the mean time can someone e-mail me the
schematics dealing with the micro area and power supply?.
Thanks in advance.

Sidney
E-mail:[email protected]
Dartmouth,Nova Scotia (the land of berries)
Canada
 
S

Sidney

Jan 1, 1970
0
Apperently the tv above is missing the 5v vcc (B+) for the micro after
extensive troubleshooting I noticed that when I take my Fluke DMM
series II model:29's lead and touch pin 8 of IC901=TDA4605-3=Hitachi #
2020392 the tv comes on and works normally but there are times when
the tv will not come on then after I touch pin 8 the tv comes on again
of course after I press the power button.
I replaced the three electrolytics around IC901 but problem is still
there,anyone have any tips to allow me to isolate the problem
more?.Thanks.

Sidney
E-mail:[email protected]
Dartmouth,Nova Scotia (the land of berries)
Canada
 
Top