[TechAssist] Re: fix: Hitachi Ultravision 46UX24B loses sound after warm]
- From: Philip Bader <tjanphyl@xxxxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Tue, 25 Nov 2003 18:35:02 -0500
I stupidly forgot to give the numbers on the tuner: It's the larger of
the two tuners.location U101.
HC00221 Sony D
BTF-WB451
Hitachi# ? cannot locate. Anyone have it for the record?
Thnks,
Phil Bader
Phil Bader wrote:
>
> My response to Alvie below:
> (Thanks, Bob).
> As usual, Alvie you are always so gratious to help, as you have in the
> past.
> I wanted to share the fix.
> I listened carefully when the sound went out. I realised the "buzz" that
> remained was the 4.5 MHz sound carrier. Ahh, "IF"... The main tuner
> "U101" is an
> integrated Sony tuner with audio and video IF processing internally.
> I happened to have a tuner and swapped it out. The set even has a better
> video
> display now,(it seemed to have a silver effect to the bright areas
> before) and
> sound is clear, and has been on for an hour OK. Looks like U101 was the
> fix.
> Inside Tuner U101 is an:
> IC02: SBX1838-01 (Sony IC,looks like a large version of a SBX1637, has
> 10 smd
> caps) ,
> IC01:(Sony IC) CXA1446S
> Trace side:
> two SMD ICs:
> numbers: DA5633 (Philips) and 4092FP (Mitsubishi)
> ceramic filters: SWF01, SWF02.
> Not sure the culprit. any guesses?
> Thanks, all, for the assistance.
> A true Thanksgiving week.
> Phil Bader
>
> "Alvie Rodgers C.E.T." wrote:
>
> > Hey Phil:
> > I don't have much on this symptom:
> > Here's some:
> >
> > Symptom: NO AUDIO. MUTE ACTIVATED. NOTE: C461 IS LABELED K464 ON THE PWB.
> > Cause: C461 SHORTING ACROSS R426 or K467. CAPACITOR IS BENT TO THE LEFT.
> > BEND THE CAPACITOR TO THE RIGHT, AS VIEW FROM THE BACK. LOCATION: JUST
> > BEHING THE REAR JACK PANEL PLASTIC, JUST IN FRONT OF THE 8 TUNER. NOTE: C461
> > IS LABELED K464 ON THE PWB
> >
> > Symptom: LOW AUDIO
> > Cause: REPLACE IZ01
> >
> > Do you have any activity on pin 48 of the Microprocessor?
> > Do you have any activity on Emitter of the Q013?
> > Do you have any activity on Base of the Q403?
> > What's the DC potential of pin 11 of I401 with and without Audio?
> >
> > **********************
> > Alvie Rodgers C.E.T.
> > Technical Writer/Trainer
> > Hitachi Home Electronics
> > www.hitachiserviceusa.com
> >
> > Please post your repair for others
> > to benefit.
> > **********************
> >
> > ----- Original Message -----
> > From: "Gemini Computer & TV" <geminitv@xxxxxxxxxxxxxxxx>
> > To: "Alvie Rodgers C. E. T." <rodgers@xxxxxxxxx>; <tjanphyl@xxxxxxxxxxxxxxx>
> > Sent: Monday, November 24, 2003 6:56 PM
> > Subject: Hitachi Ultravision 46UX24B loses sound after warm
> >
> > Phil,
> > I have forwarded this to Alvie Rodgers from Hitachi for his advice and
> > expertise.
> >
> > Bob Waterman, CET® #RI-28
> > Master Technician License #9109
> > Service Manager / Parts Manager
> > Gemini Computer, TV, & Security Alarms
> > (508)695-7302
> > (508)695-7769 FAX
> > geminitv@xxxxxxxxxxxxxxxx
> > geminitv@xxxxxxx
> > www.geminicomputertvsecurityalarms.com
> >
> > ----- Original Message -----
> > From: "Philip Bader" <tjanphyl@xxxxxxxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Monday, November 24, 2003 2:44 PM
> > Subject: [TechAssist] Hitachi Ultravision 46UX24B loses sound after warm.
> >
> > > Came in with sound working.After 10-20 min I noticed no audio. Turning
> > > up volume I hear a low buzz ( like a mic with bad ground).
> > > Has a jack panel with Sony ICs.Cool sprayed aropund, no effect so far.
> > > Any histories on this?
> > > I'm downloading the pdf on it, but going slow today.
> > > Of course this was dropped off just before close Saturday, she called
> > > this morning for a "status"...
> > > Thanks,
> > > Phil
> > > --
> > > Philip Bader
> > > Jan Phyl TV Inc. (estab. 1976)
> > > 3420 Recker Hwy. Winter Haven, Fl. 33880
> > > Fax (863) 299-8821
> > > email: tjanphyl@xxxxxxxxxxxxxxx
> > >
> > >
> > ****************************************************************************
> > *
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> > >
>
> --
> Philip Bader
> Jan Phyl TV Inc
> 3420 Recker Hwy
> Winter Haven, Fl. 33880
> Fax: 863-299-8821
> "consumer electronics service since 1977"
>
> *****************************************************************************
> Lost Password:
> http://www.tech-assist.org and select "Login Problems?".
> Email Archives:
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--
Philip Bader
Jan Phyl TV Inc. (estab. 1976)
3420 Recker Hwy. Winter Haven, Fl. 33880
Fax (863) 299-8821
email: tjanphyl@xxxxxxxxxxxxxxx
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