OFFICIAL (Raven) Panasonic 7" LCD Monitor Thread

NERDtendo

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OFFICIAL (Raven) Panasonic 7" LCD Monitor Thread

This is the thread where people who have purchased the Panasonic 7" LCD Monitors that Raven was selling get to share how they hooked up the little guys and got them going. Also, you can post your questions for others about your monitor. I have 2 of these and 3 of Nephasth's wiring harnesses. I have not used anything yet as I have other projects lined up before making my portable test bench. However, I will start things off...

I am new to the monitor business. I have never capped a monitor nor have I actually repaired a monitor. All I have ever done is adjust the little dials in the back to mess with the screen. I am starting this thread as a resource for myself and others.

Here is the pin-out diagram for the monitor...

Panasonic7MonitorPin-Out.gif


There are 3 sets of grounds and 2 sets of 12v inputs for the monitor's power connector...do the grounds need to be linked and the 12v need to be linked to get power to the monitor???

Same grounding question for the video output. Also, where does the 4:3 wire go (if needed)??? If it's not needed, I should just cap it off to prevent it from shorting anything, right???



SaminVA has already done a ton of work so I'll let him know to post all his vids and material in this thread so it is all centrally located. (UPDATE: message sent)
 
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Now that everyone is getting their monitor cables from Nephasth I was hoping someone would start a thread where we all can share info and ideas about these Panasonic 7" LCD Monitors Raven got for us. Thanks again.
Sense I already had some plugs that fit the monitor I got a jump on most hooking the monitor up and testing it out. First I will try and answer NERDtendo's questions.

There are 3 sets of grounds and 2 sets of 12 v inputs for the monitor's power connector...do the grounds need to be linked and the 12 v need to be linked to get power to the monitor???

No,for power I only connected pin 1 +12 v and pin 2 ground on the 5 pin power connector and the monitor seems to run fine but if you have the plugs built by Nephasth which have all the wires then connect the 2 12 volt pins together and the 3 grounds together sense they are their.

Same grounding question for the video output. Also, where does the 4:3 wire go (if needed)??? If it's not needed, I should just cap it off to prevent it from shorting anything, right???

Same thing here, I only used what I needed the R,G,B,SYNC,GROUND and 4:3 wires but if you have all the wires in the plug then go ahead and connect all the grounds. As for the 4:3 wire that depends on if you want the monitor in the wide screen mode or not. For wide screen mode leave the 4:3 wire disconnected which will give you a full screen but will stretch your game on the screen. If you want the game the correct size then connect the 4:3 wire to +5 volts which will leave a black bar on each side of the picture but will be the correct size for the game. You can add a switch in the 4:3 wire so you can turn it on and off anytime you want.

We all should know JAMMA boards output negative composite sync and this monitor has worked perfectly with every JAMMA board I have tried so far which is a total of 3. RayStorm, Street Fighter II CE and Centipede / Millipede /Missile Command /Let's Go Bowling by Team Play. Here's the first JAMMA test video.

I had also tried my MT830A monitor signal generator which did not work as I found out it only puts out a positive sync. Before I figured this out I had made a video showing the monitor connected to the MT830A monitor signal generator

The last video shows it working with Street Fighter II CE and shows the controls on the back. The control pots rotate a full 360 degrees but are only a one turn pot so one rotation is its full range. You need a non conductive screwdriver, a metal screwdriver will short the pot making it impossible to see the adjustment.

That's about as far as I have gone with the monitor so far. I would like to try and make a sync inverter and try and get the monitor to work with a positive sync. I was looking at the wiring schematic that's on the first page and it shows the sync connected to a LM1881N which is a Video sync separator which is powered by a 78L05 5 volt voltage regulator which they also show powering the 4:3 mode which is how I knew it took 5 volts to power it. I am not sure what the LM1881N is doing in this circuit. Here is a description of what the chip will do
The LM1881 Video sync separator extracts timing information including composite and vertical sync, burst/back porch timing, and odd/even field information from standard negative going sync NTSC, PAL* and SECAM video signals with amplitude from 0.5V to 2V p-p. The integrated circuit is also capable of providing sync separation for non-standard, faster horizontal rate video signals. The vertical output is produced on the rising edge of the first serration in the vertical sync period. A default vertical output is produced after a time delay if the rising edge mentioned above does not occur within the externally set delay period, such as might be the case for a non-standard video signal.

Let the discussion begin :)
 
I was going to post this in my cable threads, but this is a more appropriate place for these. Here's how I have my monitors hooked up to an ArcadeVGA.

I installed a Molex MicroFit dual row 14 pin connector to the other side of the harness that I made.
2011-10-04_14-50-44_115.jpg


And installed the other side of the 14 pin connector to a VGA cable and power harness that I made. You can see how I daisy chained the grounds here. The 4 grounds from the monitor's 9 pin connector are grounded through the VGA cable. The 3 grounds from the monitor's 5 pin connector are grounded through the power harness. The power harness gets connected to a computer power supply via the 4 pin Molex MicroFit connector pictured. It has 2 grounds, 12V, and 5V. 5V of course being used for pin 8 of the 9 pin connector to letterbox 4:3 aspect ratio on the monitor (this will be switched in my final setup). You can see in the pic my sync wires are cut, I was messing with (and still having problems with) the sync of the monitor.
2011-10-04_14-53-32_570.jpg
 
Works great with my MAME machine. I only used it since it was the easiest to hook the monitor to quickly. Can't wait to build my test rig. I attempted to take a video of the screen, but it was laced with profanity yelling from when my cat climbed into the game and proceeded to pull a bunch of wires out during filming. It works though. :)
 
Works great with my MAME machine. I only used it since it was the easiest to hook the monitor to quickly. Can't wait to build my test rig. I attempted to take a video of the screen, but it was laced with profanity yelling from when my cat climbed into the game and proceeded to pull a bunch of wires out during filming. It works though. :)

What resolution are you running at? Are you using an ArcadeVGA or Soft15khz?
 
I wonder about opening it up and tapping into that pin 4 of the chip for testing boards that require separate sync?

Panasonic7MonitorPin-Out.gif

I am not sure if the circuit with the LM1881n and the 78L05 are on the monitor board or if it's another circuit board or even in a wire harness adaptor.The 9 and 5 pin sockets on the right of the pin-out diagram are the ones on the back of the monitor. I dont see the 6 pin and 2 pin connector anywhere on the monitor unless they are hidden inside the cover.
 
Highly doubtful the 6 pin and 2 pin connectors are inside the monitor, they're almost twice the size of the ones on the back of the monitor (2.5mm vs 1.5mm). That and with the 4:3 wire being dashed, I'm assuming it's optional and optional equipment most likely isn't installed inside the monitor.
 
Opened one up (there goes my waranty :)), surprisingly there is a lager 3 pin connector inside. There are also 2 additional pots that aren't accessable with the back cover on. No clue what they do. VR852 and VR901

2011-10-04_18-21-23_589.jpg
 
Opened one up (there goes my waranty :)), surprisingly there is a lager 3 pin connector inside. There are also 2 additional pots that aren't accessable with the back cover on. No clue what they do. VR852 and VR901

2011-10-04_18-21-23_589.jpg

Ok I see the pots but where's the large 3 pin connector? I see the one at the top which is maybe a 40 pin ribbon which should go to the screen matrix or what ever you call it and the large plug on the left with 2 wires should be the power for the CF back light and should be Hi voltage. What am I missing?:rolleyes:
 
Opened one up (there goes my warranty :))


That's OK....you didn't have one anyway. :D

Excellent idea for a thread guys. Now, before any of you start hacking away and break your new toys, let me offer this.....I have 5 or 6 of these that didn't pass testing for me. They did not power up, so I stuck them in a box off to the side. If you want something to experiment with, you can have these for $20 each plus shipping. They look perfectly fine, but I don't work on monitors and have no plans to try and fix them. Probably just a fuse anyway ;). I'd rather lose a little money and let these go to somebody than lose it all and toss them.

Oh, and the mystery connectors shown in the diagram that you guys are looking for may just be the original cables that these would have come with. Just a guess.
 
VR852 adjusts power supply voltage.

VR903 is vertical position.

You can thank Channelmanic for the updated info. He came over and helped me attack the insides on these.
 
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That's OK....you didn't have one anyway. :D

Excellent idea for a thread guys. Now, before any of you start hacking away and break your new toys, let me offer this.....I have 5 or 6 of these that didn't pass testing for me. They did not power up, so I stuck them in a box off to the side. If you want something to experiment with, you can have these for $20 each plus shipping. They look perfectly fine, but I don't work on monitors and have no plans to try and fix them. Probably just a fuse anyway ;). I'd rather lose a little money and let these go to somebody than lose it all and toss them.

Oh, and the mystery connectors shown in the diagram that you guys are looking for may just be the original cables that these would have come with. Just a guess.

Maybe they are working but the backlight is out? If you plug them in and look at an angle you may be able to see the LCD working but with no backlight.

Bill
 
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