CurtPalme.com Home Theater Forum

the big E · Joined: 20 Apr 2013 Posts: 1928 Location: speedwell Tn.

Ok I have been eyeing this set for a few weeks at my local thrift store and decided to get it as I am have been wanting a older 4:3 set to use with my older game consoles

It is a rca model pjr500sr(made by hitachi for rca)

It works great just I need to tweak a few convergence adjustments (I think?) on the pcb along with clean the insides up

Ok so I remove the back of the set and am suprised to be staring at the back side of a weird looking set of lens(along with the electronics) with the tubes pointing bell down towards the bottom of the set

Ok now here is the part I can't seem to figure out how do I get to the mirrors to clean them?

I am afraid to remove the lens units as I worry about cooling fluid coming out(which would trash the set) if I did

It didn't come with a remote(not that it matters though)but it would be nice to have

Is there anyway I can get a service manual for this set at all?(have looked on line with no luck)

If pics are needed I can upload them

Btw I have already checked the inputs and they work(sucks it would need a convertor to get over the air as that would take away from the looks of the set)

I plan on putting it in my shop once I get it straightened out

Jeremy112 · Joined: 28 Sep 2006 Posts: 2649 Location: Fond du Lac, WI

You'll probably have to remove the screen for the TV to get at the mirror, I had to do that on every RPTV I've cleaned, its the only way. Usually the tubes are separated from the mirror by a board in-between the screen and electronics... Anf you generally don't remove that to clean it all up.

You should also be able to get to the lenses from the screen face as well (I would think...) I've worked on probably 10-12 projection TV's total, but they are all more or less designed the same way.

the big E · Joined: 20 Apr 2013 Posts: 1928 Location: speedwell Tn.

I have worked on projection tvs(both cleaning and service) many times and never seen one like this

I would love to get ahold of a service manual(it would be a godsend really)

What's weird is how it's setup instead of the tubes at the bottom of the chassis pointing up at the mirror they point down and the lens fire towards the front bottom of the set at a small mirror(it's this mirror I need to clean) then it reflects it up to another mirror then to the screen

I will upload a few pics of it today so someone can see it and help me to figure out how to work on it

Jeremy112 · Joined: 28 Sep 2006 Posts: 2649 Location: Fond du Lac, WI

**AnalogRocks** · Posted: Wed Mar 18, 2015 3:12 pm Post subject:

What if you search for an Hitachi service manual instead? Hitachi # VP3X

the big E · Joined: 20 Apr 2013 Posts: 1928 Location: speedwell Tn.

the big E · Joined: 20 Apr 2013 Posts: 1928 Location: speedwell Tn.

the big E · Joined: 20 Apr 2013 Posts: 1928 Location: speedwell Tn.

No luck searching for it as a hitachi set either(weird)
Anyway here is a few pics of the set
The front
(You can tell the insides need cleaning)

The tubes

The back side of the lens units(afraid to remove as I don't know how the cooling chambers are set up on the tubes)

The model number sticker on the back

Back side of the user controls(at the bottom of the pic you can see the service convergence board which I need to get to)

Layout diagram of the set

Jeremy112 · Joined: 28 Sep 2006 Posts: 2649 Location: Fond du Lac, WI

I'm no expert on TV's from 31 years ago... But it still looks like you need to remove the front screen to get at the lenses and mirrors according to the pic right above.

ecrabb · Posted: Wed Mar 18, 2015 11:34 pm Post subject:

Man, that's some LD - low definition! That mirror must be caked with smoke, dust, and dirt.

A lot of those sets had screen frame/bezel that was in four sections - top, bottom, left, right. The bezel sections held the screen on and snapped off to remove the screen material. Those sections were held on with t-slot or a few even used alignment guide pins and velcro if I'm not mistaken. Just a thought.

Hope you didn't pay too much for it! I see RPTV's all the time for free or nearly free - especially older stuff.

SC

the big E · Joined: 20 Apr 2013 Posts: 1928 Location: speedwell Tn.

I will try and remove the screen
I think the bezels PPP into place it's just I am afraid I will damage the screen

I didn't pay a lot for it so If it does kick the bucket I ain't out much

I mainly got it for my older game consoles(nes, snes and n64) so if the tubes have wear it won't matter(it's cheaper then tubes for my projector anyway)

I have been messing around with the controls and got the picture a lot better then what it is in the pic(well for a sd set haha)

Ecrabb I will try and remove the bezel as it seems that's the only way to get to the mirrors
Just need to figure out how to get the conference controls in case I need to adjust them(Its near the front of the set on the right side if facing the front without removing the screen)

**AnalogRocks** · Posted: Thu Mar 19, 2015 12:44 am Post subject:

Hey is this the original remote here: https://www.partstore.com/Part/Thomson/RCA/PJR500SR/Thomson/RCA/156532/Refurbished.aspx

El Duderino · Joined: 23 Jan 2011 Posts: 4653 Location: Portland, OR

the big E · Joined: 20 Apr 2013 Posts: 1928 Location: speedwell Tn.

the big E · Joined: 20 Apr 2013 Posts: 1928 Location: speedwell Tn.

the big E · Joined: 20 Apr 2013 Posts: 1928 Location: speedwell Tn.

Got it cleaned and man it looks great

I have been doing the convergence at the service level to get it back in spec as the blue was messed with
I need to add some glycol to the tubes as they are a bit low
Here is a few screen shots

You can't tell it in the pics but the bottom corners have double image due to the low glycol
Not sure as too how long it's been like that