[TechAssist] Re: Hitachi Model 27CX29B511 Chassis No. HP334/ Is Panasonic
- From: walter wood <wwood_38478@xxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Fri, 19 Dec 2003 07:42:00 -0800 (PST)
This set has been identified as made by Panasonic
for Hitachi.
Does anyone know how to cross it to a Panasonic
model or chassis no??
That could be a big help, as I have many Panasonic
manuals of this era.
Walter
--- George <grndmstrg@xxxxxxxxxxxx> wrote:
> Walter,
>
> The B+ label should be over the line just below,
> they misplaced it on the B-
> line which is grounded on the print near the
> audio IC. So you are correct in
> your observation and no your not cross eyed. By
> the way the print that I
> have is quite clear.
>
> George
> Afana Electronics
> Moreno Valley, CA
>
> ----- Original Message -----
> From: "walter wood" <wwood_38478@xxxxxxxxx>
> To: "Tech Assist" <techassist@xxxxxxxxxxxxx>
> Sent: Thursday, December 18, 2003 2:33 PM
> Subject: [TechAssist] Hitachi Model 27CX29B511
> Chassis No. HP334
>
>
> > Set was shutting down at turn on.
> > After a few tries I could see that the vertical
> > wasn't working.
> > I replaced the Vertical output IC and now the
> set
> > stays on, and has High voltage and filiments.
> > No sound, No OSD, and turning up the screen
> reveals
> > No vertical.
> > I downloaded the schematic from the Hitachi
> > Website, but it is poor quality.
> > In trying to find a common fault for the sound
> and
> > vertical, I have found a descripency that I
> hope
> > someone can explain.
> > The voltage chart shows Pin 13, and Pin 8 of
> the
> > vertical IC and Pin 10 of the audio IC to have
> > about 26vdc on them.
> > They are low (about 23vdc) but present.
> > In trying to see if this was a common source I
> find
> > that the vertical source is from Flyback Pin 8
> > through D561 and R552.
> > However the audio vcc seems to come from pin 4
> of
> > T801 But it looks like to me that this would be
> > negative voltage due to the diode and elyc cap
> in
> > that circuit.
> > Sorry, I can't read the location number on the
> cap
> > and diode.
> > Can anyone shed any light on this, or an I
> looking
> > at a mis-drawn print?
> > Or maybe, I'm cross eyed.
> > TIA
> > Walter
> >
> > =====
> > Walter Wood
> > Future Tech Home Center
> > 2786 Hwy. 43 N.
> > Lawrenceburg Tn. 38464
> > 931-829-3337
> > Fax 931-829-4044
> > mailto:wwood_38478@xxxxxxxxx
> >
> > __________________________________
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=====
Walter Wood
Future Tech Home Center
2786 Hwy. 43 N.
Lawrenceburg Tn. 38464
931-829-3337
Fax 931-829-4044
mailto:wwood_38478@xxxxxxxxx
__________________________________
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