64C Image scrolling vertically w/component mod

[djc6]

I just got done installing Component mod into a 64C with 8562R4 NTSC VIC-II chip. The issue I’m having is that the image scrolls slowly vertically when connected to my Yamaha RX-V867 receiver via component – here is a video:

https://www.dropbox.com/s/dr1g1zr0gvd61sd/c64%20component%20mod%20scrolling.mov?dl=0

The receiver doesn’t have an s-video input, but if I use the 8-pin DIN connector with an s-video cable directly to another TV, the image is rock solid and looks clearer than it did with old RF modulator.

Position 1 on the switch has no picture – just a green screen, position 2 and 3 look like the video above.

Any idea what the issue is? Also, I think my kit may have been short a few pin headers, I soldered on the two four-pin headers but the directions mention more. Don’t I need to connect the GND at the edge of the board? Also the board doesn’t seem particularly stable any recommendations on how to support the board better? Thanks!!

[djc6]

Something else unexpected occurred today.. My VIC-II sits snugly in the mainboard socket, but the VIC-II adapter for the component mod is very loose. A couple times the adapter came out on its own and the machine unceremoniously lost picture. Any suggestions how to improve this? Thanks!

[BuckoA51]

Do you have any picture processing turned on with your AV receiver?

Can you post pictures of your install, maybe someone can see some issues?

[djc6]

I don’t see anything in the receiver’s manual about video processing options, the options for the AV1 component input I am using are all related to audio – didn’t have audio connected. It a 10+ year old receiver, one review I found said “it doesn’t offer anything in the way of more sophisticated video processing or noise reduction.”

I uploaded pictures of install here, only thing that stands out to me are the PERHAPS missing GND pins if I’m reading install directions correctly, but I soldered everything that came with the kit (the two 4-pin headers). Here are pictures – thanks for help!

Link to pictures: https://www.dropbox.com/sh/pgdmy75z10e4c0x/AADwgyk3NRLiz7m7O-XWEf2ua?dl=0

[Hojo_Norem]

I have a Yamaha AVR (different model) myself and I also get the same rolling problem but only if I have the ‘VIDEO CONV’ setting turned ON. With my AVR, when VIDEO CONV is on it actively converts all input formats (Composite, s-video, component) and spits them out of the component and HDMI outputs.

Again, with my AVR, when VIDEO CONV is OFF, the video inputs act purely as switchers and the video enhancement mod comes through clean and stable. All the video formats are separated (IE, no cvbs>s-vid>ypbpr>hdmi conversion) and the AVR spits out the signal with no processing. I don’t normally make use of my AVR’s video conversion function (to minimise video lag) so I never knew that there was a incompatibility until I decided to see how good a job it would do converting the mod’s component to hdmi.

Turning the conversion off does mean a separate component connection from your AVR to your display is required.

[BuckoA51]

@djc6 If you had one of our first batch of kits then you may be one set of headers short, all our kits now have 3 sets so that should cover you whatever C64 you have. Get in touch if you need us to send you another set out.

[djc6]

Just to follow up..

I received pin headers, on the C64C kit they go between 3.5mm jack and toggle switch – the board is very sturdy now and no issues with it flexing of moving when connecting the composite breakout cable. All good now.

Additionally, from my photos it was determined my VIC-II adapter was not inserted all the way. You shouldn’t be able to see the legs of the adapter – the board with VIC-II adapter should be flush with top of VIC-II socket. I had to press harder than I was initially comfortable doing, but eventually the adapter popped in and its flush with the socket – no more worries about it being loose.

Hojo_Norem was right about Yamaha RX-V867 receiver incompatibility. On my receiver I had to set “Analog to Analog Conversion” to OFF – and connect component output from receiver to component jacks on TV. With this setting ON, it will convert component input on receiver and output via HDMI on receiver to TV which is how I wanted it, but you end up with that scrolling. C64 Component kit also works plugged directly into TV or into OSSC, and looks excellent.

Thanks for the help, everything working as expected now!

[djc6]

FYI in case anyone was curious, upgrading component mod firmware to version 2.9 didn’t help with Yamaha RX-V867 incompatibility.

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