No one has yet respond to my questions below posted 23 March 2021 but have responded to other users posts, posted msgs after my post?
One problem is moderation takes time so by the time my post get approved it is date wise way back in the queue. Can mods take away my restriction so that my post do show top of the queue when posted?
See my original questions in original post quoted below, let me highlight two most important questions
In essence I want to connect RGBS direct feed from arcade PCB, 5pin molex that normally goes into arcafe monitor chassis for the tube, to a TV CRT monitor chassis board that do have on the board a place to have a chip/adaptor socket to feed Red Green Blue from old devices. I do not have the chip, the purpose of tge chip explaned below bur it only do switch between AV feed comping from external socket or the three RGB feed feed as a secondary feed. I do not have any av feed just rgb from srcade pcb.
Can I just link my 5 wires one by one to each connection point on the TV CRT chassis board which contain a socket which allowfor external rgbs feed. see below my explanation in original feed.
How do I sent GND and Sync from pcb to the TV CRT AV sicket? Can I just wring the endpoints togehthet and solder it on the av input line or an sync line that goes into the CPU? Original post got link to the schematic
I do have an LG CRT which I want to hook into by linking the RGB output feed from my Pac-Man PCB dierctly to this TV CRT.
There is a RGB switch holes which are indicated as RGB external switch. The actual RGB CIRCUIT switch IC is not installed but the lines
runs through from LEFT to RIGHT. So if I hookup the RGB lines to the OUTPUT of the RGB switch circuit block
then the R(OUT) , G(OUT) and B(OUT) will feed the jungle chip as input.
See attached diagram :
I have read previous post below and I am not understanding what is written below.
cyborc wrote:
Fallen Kell wrote:
Sorry, long time lurker on this forum and I finally needed to post. I recently picked up a Sharp 27DV-S100 TV. Yes, it is a VCR/DVD combo system (and the DVD does not work), but the picture is extremely nice. After looking it over, I am trying to figure out if it is possible to RGB mod it. From everything I can find, I believe the answer is yes, but I wanted to ask someone more knowledgeable than myself to see if I am not thinking this is going to be easier than it looks.
External, everything is composite. Internally, the VCR and DVD are connected essentially through S-Video (just not using the port). However, everything is converted to RGB for the CRT. In the service manual, I found the diagram for these connections go through a single chip:
I also found the complete pin diagram for the chip:
To me that, looks like there are RGB input pins on 32-34 which are currently just going to ground (through either caps or resistors). Anyone see this chip before and know how difficult it would be to mod? I am thinking it is just a matter of wiring up an external connection to those grounded pins and and send the proper signal to tell the chip to use the RGB inputs as the source. Again, am I missing something that would make that impossible?
Here's the datasheet for that jungle IC.
http://www.datasheetcatalog.com/datashe ... 76AN.shtmlYou should be able to insert your RGB signal on pins 33-35 and blanking on pin 32. (0.75v) You will need to remove those capacitors to ground on the R, G and B lines and add your own capacitors in series with your external RGB signal. (0.1uf most likely) Overall, a relatively easy job. You lucked out! In my experience, Sharp CRTs look great when RGB modded.
Question:
=======
So I will do the same hack mentioned above but on pin 16, 13, 11 on the diagram block where the RGB Circuit switch called TEAC5114, suppose to be.
See red circled spaces in my attached diagrams here in this post?
Question:
=======
What is mean by "blanking on pin 32"? What is one need to do by blanking? What wire is a blank? Is that ground from the external RGb feed?
Question:
=========
What is mean by removing capacitors, adding own capacitors? Why is this needed? Do I have capasitors in my shematic on RGB flow?
MarkOZLAD wrote:
It may be possible to cut the ground plane traces but your plan is solid
I would just pump Sync and Audio through the AV port. Can solder underneath them if you want, (I generally break them out into RCA ports and run cables, but I'm weird.) If you need to trigger stereo you can by putting a cut RCA plug in the right channel. I have never soldered sync internally. Not sure why you think there needs to be a diode.
You should only need a switch for the RGB blanking. With blanking voltage disabled the RGB input won't do anything. If you will have a blanking voltage from your Scart/RGB cable you can use that to switch the RGB on, that way the TV enables RGB when you turn the console on.
Question:
=-======
To get sync from my Pac-Man PCB. Which nr on my schematic must I send/link sync to from RGB 5pin connector from Pac-Man PCB, white wire, I think it is a composite/combined sync from Pac-Man PCB?
Question:
========
How can one sent sync to AV port from white wire (sync) from Pac-man 5pin molex , balck (ground)? What is meant by "Sync and Audio through the AV port"?
Can I just combined white threaded wire and the ground and toe it together by hand and stick it into AV port or solder it to which SYNC line on my schematic
of the jungle chip?
Question:
"You should only need a switch for the RGB blanking. With blanking voltage disabled the RGB input won't do anything"
What is meant by switch here? RGB blanking? In my RGB Curcuit switch there is not chip so I just want to solder the RGB and sync on the RGB output
of RGB witch which led to the Jungle chip RGB input?
Question:
=======
On the RGB Circuot switch block diagram, there is GROUND (labelled as nr 2), and VCC (Voltage) as nr 14.
Must I wire RGB ground from Pac-man PCB to this nr 2?
Must I wire volatge from Pac-Man PCB (5 volt) red wire to nr 14?
How do I get ground from Pac-Man PCb to this chassis? Must the same power that switch on the TV (main plug 220V) feed
join somewhere the ground of the Pac-MAN PCB? into this chassis? If not will that stop any picture of showing?
So is any ground wire just ground or must the same ground feed coming RGB 5pin Pac-man PCB, also be the same
ground that feed the ground for SYNC generate the picture from jungle chip? So do I need GND from Pac-Man PCB feed
into Jungle chip somewhere?
Question:
=========
Where must I sent SYNC in (white wire) from PAc-man PCB SYNC to Jungle chip or RGB circuit switch output?
To be safe then: Please explain to me how to sent SYNC from PAc-man PCb to AV port and also wire another SYNC wire
to chassis - where on this block diagram?
[url]I do have an LG CRT which I want to hook into by linking the RGB output feed from my Pac-Man PCB dierctly
to this TV CRT.
There is a RGB switch holes which are indicated as RGB external switch. The actual RGB CIRCUIT switch IC is not installed but the lines
runs through from LEFT to RIGHT. So if I hookup the RGB lines to the OUTPUT of the RGB switch circuit block
then the R(OUT) , G(OUT) and B(OUT) will feed the jungle chip as input.
See attached diagram :
I have read previous post below and I am not understanding what is written below.
cyborc wrote:
Fallen Kell wrote:
Sorry, long time lurker on this forum and I finally needed to post. I recently picked up a Sharp 27DV-S100 TV. Yes, it is a VCR/DVD combo system (and the DVD does not work), but the picture is extremely nice. After looking it over, I am trying to figure out if it is possible to RGB mod it. From everything I can find, I believe the answer is yes, but I wanted to ask someone more knowledgeable than myself to see if I am not thinking this is going to be easier than it looks.
External, everything is composite. Internally, the VCR and DVD are connected essentially through S-Video (just not using the port). However, everything is converted to RGB for the CRT. In the service manual, I found the diagram for these connections go through a single chip:
I also found the complete pin diagram for the chip:
To me that, looks like there are RGB input pins on 32-34 which are currently just going to ground (through either caps or resistors). Anyone see this chip before and know how difficult it would be to mod? I am thinking it is just a matter of wiring up an external connection to those grounded pins and and send the proper signal to tell the chip to use the RGB inputs as the source. Again, am I missing something that would make that impossible?
Here's the datasheet for that jungle IC.
http://www.datasheetcatalog.com/datashe ... 76AN.shtmlYou should be able to insert your RGB signal on pins 33-35 and blanking on pin 32. (0.75v) You will need to remove those capacitors to ground on the R, G and B lines and add your own capacitors in series with your external RGB signal. (0.1uf most likely) Overall, a relatively easy job. You lucked out! In my experience, Sharp CRTs look great when RGB modded.
Question:
=======
So I will do the same hack mentioned above but on pin 16, 13, 11 on the diagram block where the RGB Circuit switch called TEAC5114, suppose to be.
See red circled spaces in my attached diagrams here in this post?
Question:
=======
What is mean by "blanking on pin 32"? What is one need to do by blanking? What wire is a blank? Is that ground from the external RGb feed?
Question:
=========
What is mean by removing capacitors, adding own capacitors? Why is this needed? Do I have capasitors in my shematic on RGB flow?
MarkOZLAD wrote:
It may be possible to cut the ground plane traces but your plan is solid
I would just pump Sync and Audio through the AV port. Can solder underneath them if you want, (I generally break them out into RCA ports and run cables, but I'm weird.) If you need to trigger stereo you can by putting a cut RCA plug in the right channel. I have never soldered sync internally. Not sure why you think there needs to be a diode.
You should only need a switch for the RGB blanking. With blanking voltage disabled the RGB input won't do anything. If you will have a blanking voltage from your Scart/RGB cable you can use that to switch the RGB on, that way the TV enables RGB when you turn the console on.
Question:
=-======
To get sync from my Pac-Man PCB. Which nr on my schematic must I send/link sync to from RGB 5pin connector from Pac-Man PCB, white wire, I think it is a composite/combined sync from Pac-Man PCB?
Question:
========
How can one sent sync to AV port from white wire (sync) from Pac-man 5pin molex , balck (ground)? What is meant by "Sync and Audio through the AV port"?
Can I just combined white threaded wire and the ground and toe it together by hand and stick it into AV port or solder it to which SYNC line on my schematic
of the jungle chip?
Question:
"You should only need a switch for the RGB blanking. With blanking voltage disabled the RGB input won't do anything"
What is meant by switch here? RGB blanking? In my RGB Curcuit switch there is not chip so I just want to solder the RGB and sync on the RGB output
of RGB witch which led to the Jungle chip RGB input?
Question:
=======
On the RGB Circuot switch block diagram, there is GROUND (labelled as nr 2), and VCC (Voltage) as nr 14.
Must I wire RGB ground from Pac-man PCB to this nr 2?
Must I wire volatge from Pac-Man PCB (5 volt) red wire to nr 14?
How do I get ground from Pac-Man PCb to this chassis? Must the same power that switch on the TV (main plug 220V) feed
join somewhere the ground of the Pac-MAN PCB? into this chassis? If not will that stop any picture of showing?
So is any ground wire just ground or must the same ground feed coming RGB 5pin Pac-man PCB, also be the same
ground that feed the ground for SYNC generate the picture from jungle chip? So do I need GND from Pac-Man PCB feed
into Jungle chip somewhere?
Question:
=========
Where must I sent SYNC in (white wire) from PAc-man PCB SYNC to Jungle chip or RGB circuit switch output?
To be safe then: Please explain to me how to sent SYNC from PAc-man PCb to AV port and also wire another SYNC wire
to chassis - where on this block diagram?
I do have an LG CRT which I want to hook into by linking the RGB output feed from my Pac-Man PCB dierctly
to this TV CRT.
There is a RGB switch holes which are indicated as RGB external switch. The actual RGB CIRCUIT switch IC is not installed but the lines
runs through from LEFT to RIGHT. So if I hookup the RGB lines to the OUTPUT of the RGB switch circuit block
then the R(OUT) , G(OUT) and B(OUT) will feed the jungle chip as input.
See attached diagram :
I have read previous post below and I am not understanding what is written below.
cyborc wrote:
Fallen Kell wrote:
Sorry, long time lurker on this forum and I finally needed to post. I recently picked up a Sharp 27DV-S100 TV. Yes, it is a VCR/DVD combo system (and the DVD does not work), but the picture is extremely nice. After looking it over, I am trying to figure out if it is possible to RGB mod it. From everything I can find, I believe the answer is yes, but I wanted to ask someone more knowledgeable than myself to see if I am not thinking this is going to be easier than it looks.
External, everything is composite. Internally, the VCR and DVD are connected essentially through S-Video (just not using the port). However, everything is converted to RGB for the CRT. In the service manual, I found the diagram for these connections go through a single chip:
I also found the complete pin diagram for the chip:
To me that, looks like there are RGB input pins on 32-34 which are currently just going to ground (through either caps or resistors). Anyone see this chip before and know how difficult it would be to mod? I am thinking it is just a matter of wiring up an external connection to those grounded pins and and send the proper signal to tell the chip to use the RGB inputs as the source. Again, am I missing something that would make that impossible?
Here's the datasheet for that jungle IC.
http://www.datasheetcatalog.com/datashe ... 76AN.shtmlYou should be able to insert your RGB signal on pins 33-35 and blanking on pin 32. (0.75v) You will need to remove those capacitors to ground on the R, G and B lines and add your own capacitors in series with your external RGB signal. (0.1uf most likely) Overall, a relatively easy job. You lucked out! In my experience, Sharp CRTs look great when RGB modded.
Question:
=======
So I will do the same hack mentioned above but on pin 16, 13, 11 on the diagram block where the RGB Circuit switch called TEAC5114, suppose to be.
See red circled spaces in my attached diagrams here in this post?
Question:
=======
What is mean by "blanking on pin 32"? What is one need to do by blanking? What wire is a blank? Is that ground from the external RGb feed?
Question:
=========
What is mean by removing capacitors, adding own capacitors? Why is this needed? Do I have capasitors in my shematic on RGB flow?
MarkOZLAD wrote:
It may be possible to cut the ground plane traces but your plan is solid
I would just pump Sync and Audio through the AV port. Can solder underneath them if you want, (I generally break them out into RCA ports and run cables, but I'm weird.) If you need to trigger stereo you can by putting a cut RCA plug in the right channel. I have never soldered sync internally. Not sure why you think there needs to be a diode.
You should only need a switch for the RGB blanking. With blanking voltage disabled the RGB input won't do anything. If you will have a blanking voltage from your Scart/RGB cable you can use that to switch the RGB on, that way the TV enables RGB when you turn the console on.
Question:
=-======
To get sync from my Pac-Man PCB. Which nr on my schematic must I send/link sync to from RGB 5pin connector from Pac-Man PCB, white wire, I think it is a composite/combined sync from Pac-Man PCB?
Question:
========
How can one sent sync to AV port from white wire (sync) from Pac-man 5pin molex , balck (ground)? What is meant by "Sync and Audio through the AV port"?
Can I just combined white threaded wire and the ground and toe it together by hand and stick it into AV port or solder it to which SYNC line on my schematic
of the jungle chip?
Question:
"You should only need a switch for the RGB blanking. With blanking voltage disabled the RGB input won't do anything"
What is meant by switch here? RGB blanking? In my RGB Curcuit switch there is not chip so I just want to solder the RGB and sync on the RGB output
of RGB witch which led to the Jungle chip RGB input?
Question:
=======
On the RGB Circuot switch block diagram, there is GROUND (labelled as nr 2), and VCC (Voltage) as nr 14.
Must I wire RGB ground from Pac-man PCB to this nr 2?
Must I wire volatge from Pac-Man PCB (5 volt) red wire to nr 14?
How do I get ground from Pac-Man PCb to this chassis? Must the same power that switch on the TV (main plug 220V) feed
join somewhere the ground of the Pac-MAN PCB? into this chassis? If not will that stop any picture of showing?
So is any ground wire just ground or must the same ground feed coming RGB 5pin Pac-man PCB, also be the same
ground that feed the ground for SYNC generate the picture from jungle chip? So do I need GND from Pac-Man PCB feed
into Jungle chip somewhere?
Question:
=========
Where must I sent SYNC in (white wire) from PAc-man PCB SYNC to Jungle chip or RGB circuit switch output?
To be safe then: Please explain to me how to sent SYNC from PAc-man PCb to AV port and also wire another SYNC wire
to chassis - where on this block diagram?
LGMC994A schematic below link:
https://drive.google.com/file/d/1Wv_4N546pbU-ltLu4c9nbdESwBMcZuiF/view?usp=sharingLG RGB Circuit Switch Link:
https://drive.google.com/file/d/1Wv_4N546pbU-ltLu4c9nbdESwBMcZuiF/view?usp=sharing
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