Frogger sync question

jimbodeanny

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So tonight I installed the G07 into my Frogger that I recently rebuilt. Fired it up and everything seems fine, except I'm having the hardest time getting the game to sync/hold. I played with the v. hold and h. freq and after some time and LOTS of TINY tweaking, I got the picture to stabilize for moment. Eventually, the picture SLOWLY starts rolling.

I've got the board running on negative sync to the G07 (I took the neg. sync wire coming from the board and ran it into the two pins of the 3pin connector going into the G07 chassis by looping it.) Then I've got the RGB and ground going into the 6pin molex. The SLIGHTEST touch on the h. freq and the picture goes nuts.

Is there something I'm missing here?

Other than that, the picture looks GREAT - at least when it slows down so I can see it!
 
So tonight I installed the G07 into my Frogger that I recently rebuilt. Fired it up and everything seems fine, except I'm having the hardest time getting the game to sync/hold. I played with the v. hold and h. freq and after some time and LOTS of TINY tweaking, I got the picture to stabilize for moment. Eventually, the picture SLOWLY starts rolling.

I've got the board running on negative sync to the G07 (I took the neg. sync wire coming from the board and ran it into the two pins of the 3pin connector going into the G07 chassis by looping it.) Then I've got the RGB and ground going into the 6pin molex. The SLIGHTEST touch on the h. freq and the picture goes nuts.

Is there something I'm missing here?

Other than that, the picture looks GREAT - at least when it slows down so I can see it!

You could try running your sync wire to only the horizontal (-) input.
 
No dice. Tried just the horizontal (shifted the 3pin over 1) and still the same. I get a picture, but it's still rolling and EXTREMELY touchy with the v. hold and h. freq.

The image is also upside down, but I assume that's minor and just a matter of swapping a couple wires. This wouldn't affect the sync, right?
 
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No dice. Tried just the horizontal (shifted the 3pin over 1) and still the same. I get a picture, but it's still rolling and EXTREMELY touchy with the v. hold and h. freq.

The image is also upside down, but I assume that's minor and just a matter of swapping a couple wires. This wouldn't affect the sync, right?


Nope won't affect it, you can flip the vertical yoke wires to invert the pic though.
Assuming your sync signal from the boards is good, you can try changing c302 a 220/16 cap which filters the 12 v for the sync amps and IC.

The HA11244 IC may be flakey though.
Since you have neither horiz or vert sync it seems to be an issue in the sync amp circuit.
I doubt both x305 (x301) and x306 (x302)are bad so IC 501 (HA11244) would be a suspect since it is the common denominator.

BUT... you have to make sure your sync signal is good (+2 to +4 volts).
And make sure your ground is good as well.
 
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Well I know the sync is fine coming from the board since it worked fine on another monitor.

So where is HA11244 IC? And where can I find replacements for it and the other transistors?
 
Well I know the sync is fine coming from the board since it worked fine on another monitor.

So where is HA11244 IC? And where can I find replacements for it and the other transistors?

Which G07 chassis do you have before we get too far. I was assuming a CB0.
 
Yes it's a CBO

The Ic (IC501) HA11244 is located directly behind the vertical height control.
X301, X302, X305 and X306 are located along the edge of the board near the video connector and are all 2SC454C or 2SC1685 transistors. Both these can be sourced online.
Does your game have a composite sync output, or separate vertical and horizontal outputs?
 
Composite sync output

Is there a number on your frogger boardset...

834-0086, 800-0084, 834-0084 etc
And is your wiring harness for the video original?
If so, what color are the wires?


Video wiring from frogger edge connector should be red, green, blue, white/blue, black, yellow, white
White/Blue being composite sync, yellow = horizontal sync, white = vertical sync

I'm wondering if your ground and sync wires might be flipped.
 
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834-0086

The wires coming from the harness are R,G,B,black and white, with white being the composite negative sync. I know it's that way because it worked fine on the 8liners/wei-ya monitor I tried it on.
 
834-0086

The wires coming from the harness are R,G,B,black and white, with white being the composite negative sync. I know it's that way because it worked fine on the 8liners/wei-ya monitor I tried it on.

Is there a plug in between the monitor video wires and the game harness?
If so, what does the white wire change to on the frogger side of the plug?
If it's a composite signal I would expect a white/blue wire.
 
There's no plug. The wires had previously been cut. The wires I described are the ones coming from the board edge connector/harness.

One thing that I should note is that I have both the 3pin connector (for negative sync) and the 6pin (R,G,B,Ground) connectors being used. However, I only have the 2 sync wires running into the 3pin connector - as Bob Roberts has illustrated. Do I need to to run a 3rd wire to that 3pin connector?
 
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There's no plug. The wires had previously been cut. The wires I described are the ones coming from the board edge connector/harness.

One thing that I should note is that I have both the 3pin connector (for negative sync) and the 6pin (R,G,B,Ground) connectors being used. However, I only have the 2 sync wires running into the 3pin connector - as Bob Roberts has illustrated. Do I need to to run a 3rd wire to that 3pin connector?



No, ground is common between the two connectors.
Assuming the board outputs negative composite sync that should work.
But if you have only a single white wire for sync, and if it is an original frogger harness, the white wire (according to the frogger schematic I'm looking at) is for vertical sync only, a yellow wire should be for horizontal.... composite sync should be a white wire with a blue stripe.

Did you notice if there is a number on your board?
834-0086 or 800-0084 or 834-0084??
I'm curious as to what pin the white wire is coming from on your frogger board.
 
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sync

for shits and giggles try putting your sync wire next to the ground wire in the 6 pin plug and then in the 6 pin plug number six postion and if that does not work try both 5 and 6 position at the same time. This is pos. sync but if you say you did hook everything up right then try it.
Also check in the 3 pin plug if the pins are crushed in the plug and will not make good connection. Try measuring continuity between 2 and 3 pins to see if you have no break.
Look at schematic for the transistors that might be shorted, that the sync pins lead to.
Usually when you have a go7cbo that barely locks in and then rolls its the wrong sync or you dont have both h/v syncs hook up, correctly.
Maybe you only have a few strand of wire in the pin and it wont make a good connection?

?
 
Usually when you have a go7cbo that barely locks in and then rolls its the wrong sync or you dont have both h/v syncs hook up, correctly.
Maybe you only have a few strand of wire in the pin and it wont make a good connection?

?

I'd agree in that situation, but I don't think this is it. This is mimicking a G07 I've been fighting with on and off for a while. It never stops scrolling. I suspect one of the new caps I put in are bad, but I would like an ESR meter to be sure. I"ll order one eventually, unless someone near me has one I can use.
 
Test the G07 in question with one of your other games. If it locks up sync using another game, then it is your wiring in your Frogger cab. If it doesn't sync up, then you have a monitor issue.
 
I've got a similar problem with a G07 chassis I got recently. I didn't cap it myself, so I'm not sure what all was replaced on it, but I can get it to roll really slow, but never completely stop. Happens on the 2 boards I have, a 48-in-1, and a Crazy Kong board.
 
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