PT-46001 (hitachi) shutdown.

J

Jason D.

Guest
Have you seen this like this and tell me what was usual faults for
this Hitachi PT-46001?

I can see horizontal pulses for a second the instant projector plugged
in also same thing with power button.

Checked for burned resistors, convergence & vertical circuit looks
good.

This model is 1991 manufacture.

Cheers,

Wizard
 
Jason does this chassis swing outwards to the right ?

kip

--
"Watch the return E-Mail addy its false"
"Jason D." <jpero@sympatico.ca> wrote in message
news:40305c82.5908313@news1.on.sympatico.ca...
Have you seen this like this and tell me what was usual faults for
this Hitachi PT-46001?

I can see horizontal pulses for a second the instant projector plugged
in also same thing with power button.

Checked for burned resistors, convergence & vertical circuit looks
good.

This model is 1991 manufacture.

Cheers,

Wizard
Click to expand...
 
On Mon, 16 Feb 2004 07:21:11 -0500, "john"
<va3mmTAKEOUTTHIS@niagara.com> wrote:

Jason does this chassis swing outwards to the right ?

kip
Click to expand...
Kip,

Not this awful kind (had one!). The board (horizontal & HV, power)
sits in black tray that slides into cabinet like usual TV. Much
better physical design for service. Vertical IC lives on the micro &
video (vertical board).

I'd be surprised if Hitachi used same model for different old and new
chassis designs.

Cheers,

Wizard
 
Jason,
That sounds like the description of a CU-4600/4601 model.
That model is known for loads of bad/leaky caps.
Wholesale cap replacement similar to a Mits V-11 chassis.

Good Luck,
Bill Jr



"Jason D." <jpero@sympatico.ca> wrote in message
news:403178a5.8713994@news1.on.sympatico.ca...
On Mon, 16 Feb 2004 07:21:11 -0500, "john"
va3mmTAKEOUTTHIS@niagara.com> wrote:

Jason does this chassis swing outwards to the right ?

kip

Kip,

Not this awful kind (had one!). The board (horizontal & HV, power)
sits in black tray that slides into cabinet like usual TV. Much
better physical design for service. Vertical IC lives on the micro &
video (vertical board).

I'd be surprised if Hitachi used same model for different old and new
chassis designs.

Cheers,

Wizard
Click to expand...
 
On Tue, 17 Feb 2004 13:03:54 GMT, "Bill Jr" <bill@nospam.usa2net.net>
wrote:

Jason,
That sounds like the description of a CU-4600/4601 model.
That model is known for loads of bad/leaky caps.
Wholesale cap replacement similar to a Mits V-11 chassis.

Good Luck,
Bill Jr
Click to expand...
Even for that Hitachi projector? That black tray is one piece and has
to take the board off the tray to get at solder-side. HV leads caps
simply screws in and out of HV block.

What areas of this caps involved? I checked the deflection/power
board and appears to be good with ESR meter and didn't stink up when
heated with soldering iron.

The power supply is SMPS instead of linear regulators.

Cheers,

Wizard

"Jason D." <jpero@sympatico.ca> wrote in message
news:403178a5.8713994@news1.on.sympatico.ca...
On Mon, 16 Feb 2004 07:21:11 -0500, "john"
va3mmTAKEOUTTHIS@niagara.com> wrote:

Jason does this chassis swing outwards to the right ?

kip

Kip,

Not this awful kind (had one!). The board (horizontal & HV, power)
sits in black tray that slides into cabinet like usual TV. Much
better physical design for service. Vertical IC lives on the micro &
video (vertical board).

I'd be surprised if Hitachi used same model for different old and new
chassis designs.

Cheers,

Wizard
Click to expand...
 
Yes,
Start by replacing every polarized aluminum electrolytic capacitor on the
deflection/power board.
Then remove the board with the tuner/vertical/etc and do the same.
After the do the same for the audio, convergence output and convergence
waveform board.
Only then can you be assured of a repair that won't come back and bite you
in the butt.

Good Luck,
Bill Jr


"Jason D." <jpero@sympatico.ca> wrote in message
news:4032a440.3385660@news1.on.sympatico.ca...
On Tue, 17 Feb 2004 13:03:54 GMT, "Bill Jr" <bill@nospam.usa2net.net
wrote:

Jason,
That sounds like the description of a CU-4600/4601 model.
That model is known for loads of bad/leaky caps.
Wholesale cap replacement similar to a Mits V-11 chassis.

Good Luck,
Bill Jr

Even for that Hitachi projector? That black tray is one piece and has
to take the board off the tray to get at solder-side. HV leads caps
simply screws in and out of HV block.

What areas of this caps involved? I checked the deflection/power
board and appears to be good with ESR meter and didn't stink up when
heated with soldering iron.

The power supply is SMPS instead of linear regulators.

Cheers,

Wizard




"Jason D." <jpero@sympatico.ca> wrote in message
news:403178a5.8713994@news1.on.sympatico.ca...
On Mon, 16 Feb 2004 07:21:11 -0500, "john"
va3mmTAKEOUTTHIS@niagara.com> wrote:

Jason does this chassis swing outwards to the right ?

kip

Kip,

Not this awful kind (had one!). The board (horizontal & HV, power)
sits in black tray that slides into cabinet like usual TV. Much
better physical design for service. Vertical IC lives on the micro &
video (vertical board).

I'd be surprised if Hitachi used same model for different old and new
chassis designs.

Cheers,

Wizard
Click to expand...
 
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